PHYSICUS

Commentary and Walkthrough by Soren Andersen

 

 

COMMENTARY

 

If physics and math turn you off, then Physicus may not be for you. Solving puzzles based on elementary Newtonian physics is at the heart of game progress in saving the world. (It claims to be for ages 10-102.) It comes with fairly simple animated treatises on optics, mechanics, electricity, heat, and acoustics that can be used as reference at any time, at least after you master the game interface. However, I must point out that it is a standard linear Adventure game in which something must be found or done to find or do something else in order to do that again, and if spoilers are used to answer challenging scientific puzzles, then the game flows along in a very satisfying manner.

 

With regard to interfacing, moving about is far from perfect. The scene shifts are abrupt (no panning), you may have to advance as the only way to move out of one, or you may have to turn to one side or turn around, and very frequently only one of these options is available. All but one of the cursors are identified on page 9 of the instruction booklet, the missing one is a reverse arrow that allows you to move directly backward from the screen into which you have just moved, and at times it is hard to locate it as it may appear only in a particular small area of the screen. You will just have to learn with practice.

 

The game designers have chosen to provide only eleven slots to store games, which is insufficient since the Adventure gamer is always advised to save often. As you progress through the game you will have to decide which stored games are important enough to retain, and store over the others.

 

The inventory with its red and green scanners as described on page 8 are devices that so far I have found to be unique to this game. There are numerous objects to be acquired (green scanner) but fortunately they are used (red scanner) before long, so the inventory is not large at any one time. None of the inventory items are identified by name.

 

The planet that is the locale of this game has a rather cartoonish quality about it insofar as the structures that you will find in it, and the limited views that are presented make it sometimes difficult to identify what they are and their purpose. Carefully examining scenes as you pass through them will help. However, the details of the graphics are superb throughout.

 

As Mark Twain put it, “There is something fascinating about science. One gets such wholesome returns of conjecture out of such a trifling investment of fact.”

                      Soren Andersen,  Feb 04


 

 

WALKTHROUGH

 

The opening video sets up the game premise, “Save the World with Science”, and is well worth looking at more than once; for one thing, it gives a view of the island locale that you won’t get elsewhere. There is a view of the windmill as you fly by, and it identifies one of the strange buildings as an observatory. You must pay attention to details about the planet saving impulse machine, both in the video and the narrative.

 

The Toonerville Trolley spacecraft in which you arrive has put you down on the edge of the sea at the end of a pier facing a gate. Go through the gate and enter the beach cottage, the first of the strangely contrived structures of this game. Turn left and approach a wooden table on which is a laptop computer (so to be designated shortly) of a type that you will never have seen before. Click on it to have it unfold, and a list of the five science/engineering tutorials is presented.

 

At this point you can take the time to run through any or all of these interactive treatises, and it will indeed take time, but it is not time wasted. Depending upon your attitude, however, it may get tedious. Immediately, or at any time you wish to do so, you can return to gameplay by clicking on the red button at lower left.

 

Note: when viewing the tutorials, the controls for them are immediately below the screen on the right. The left one of these, an outline of a tape cassette, brings up a table of contents (TOC) for the tutorial being examined, and from this you may choose a subject subdivision to explore. Also, keep an eye on the interactive legends immediately above the screen at the right, in the game as well as in the tutorials.

 

Back away from the table and the laptop is no longer there because you are now carrying it with you to use as desired at any time by clicking on the green button at lower left. Turn left and a communications device begins ringing and flashing. Go to it and press the center arrow key to get a message that is a continuation of the one from the introductory video. You are to locate three generators and associated equipment that when placed in operation and properly adjusted will supply the impulse machine with the correct voltage to place it in operation and set the planet rotating again.

 

Nothing more to be found in the cottage, so leave and go left into the rocks and trees. After several forward moves the path leads to a stone arch and a butterfly flies across it. Take that as a sign not to press forward, turn left instead, and you will see two of the strangest buildings on this island: one looks like a large metal oil drum and the other, a smithy, somewhat resembles a potbellied stove with three large chimneys.

 

When you enter the latter the most prominent item is another potbellied stove resemblance on which is cast the legend 100 kg. This is a drop forge, with the hammer being the dark cylinder below the cast value and in front of the corrugated tube opening. On the forge is a black knob that when dragged to the right raises the white and tan notched lever arm; bringing the arm back down raises and drops the hammer. What you want to do is use one of the three calibrated weights to have the lever arm produce a lifting force of 100 kg at the hammer, whereupon the arm is level and the hammer remains raised so that something can be placed under it to be forged. One way to do this is to try each weight in the seven notches along the bar until it moves and remains level; however, what you are supposed to do is click on the legend “simple machines” above the screen on the right, and this will take you to the point in the Mechanics tutorial that shows how to calculate the solution, which is to hang the 20 kg weight in the fifth notch (20x5=100).

 

Climb the ladder to the left of the forge and find a furnace to melt metal that is fed down to the forge. The red scanner indicates that something goes in the bucket atop the furnace, but you have nothing in inventory. Go around to the back of the furnace to see the valve to turn on the gas for it. Nothing to do up here since you have no metal to melt, so return to the room below and look around before you leave. Resting on a round forging you will find a red and green cylinder that you will learn is a bar magnet. Click on it to put the green scanner to work and place the bicolored cylinder in your inventory.

 

Leave and go to the other building. This appears to be someone’s dwelling, and recently vacated since there is a pot boiling on the

stove. Two items are to be found for inventory: a mirror above the sink and a 2 kg clock weight. There is a rolled up note in a jug on the table that must be read; it shows a puzzling sketch and a reference to

the boiling point of water. Above the screen are two references that will take you to tutorials for magnetism and heat. Check them out.

 

That’s it for this area for now. Return to the pathway through the arch and proceed along it until you come to a stucco house with a ladder leaning on it and a woodpile on the left. Along the way be sure and note what appears to be a large trashcan suspended from a curved girder high above the path. To the left of the woodpile is a rickety wooden walkway ending at a stream that runs behind the house. On the other side of the stream is a raised drawbridge with no way to lower it, so turn around and go to the front of the stucco house. The door is locked, so move around it to the right.

 

Here you find a barrel, conveniently indicated to weigh 18 kg, covering a cellar entrance to the house. Affixed to the barrel is a rope and pulley arrangement giving a mechanical advantage of 3 (reference tutorial TOC Mechanics/Simple machines/Pulleys). You can raise the barrel by pulling on the magnet at the end of the rope, but of course it falls back when you release the magnet. If you had an iron weight of at least 6 kg (18/3) to attach to the magnet you could keep the barrel up and enter the cellar, but you only have 2 kg from the clock, so you must find 4 kg more. Before starting to do this, look at the wood plaque on the wall of the house, where you will see a drawing of the trashcan and the notations 3040 W and 4 Amp. Keep this in mind.

 

Go back to the front of the house, then move to the right where there is a long walkway leading up to what appears to be at least part of a ship, so identified by an anchor on it, wrecked on top of a great rock. On either side of this walkway are pillars on top of which are representations of the moon and sun. If you click on the sun’s disk it will open to reveal illustrations of three moon phases, the significance of which will appear later.  

 

Proceed up the walkway to the ship hulk. You can turn the handwheel on the entry hatch but the hatch won't open. You can, however, swing back the cover of the porthole on the left. Get a closeup and lower the cover by pressing the red button, and you will see the source of the sketch that you found in the oil drum dwelling. Moving the lower magnets will force the numbered upper ones up. The red scanner indicates that something is to be placed on the pedestal to the right, and this is obviously the bar magnet that you have in inventory, so do that. (reference tutorial TOC Electricity/Permanent magnetism/Magnet and magnetic field.)

 

There are three values for the referenced boiling point of water, depending upon which temperature scale is used. Fahrenheit is not used in scientific work, leaving Centigrade (Celsius) and Kelvin. Go to the Heat tutorial TOC and choose Melting and Boiling from Aggregation States, where you will be told that the boiling point of water is 100ºC. There will be a device for you to raise and lower water temperature so that it boils or condenses, and there is a temperature readout in both Centigrade and Kelvin. Watch these readouts and note the Kelvin reading when the Centigrade reading momentarily is 100. Move the magnets in the unit in the porthole to this Kelvin value and the hatch will open when you turn the handwheel.

 

Enter the ship. To the left is only darkness; you can turn around and go that way but it is pointless. Go up the ramp to the right and into a room containing a telescope and an adjustable frame with an oval opening in the center. A closeup of the frame brings up the red scanner; if you look in inventory you will see that the mirror you got in the drum dwelling has the right shape to fit, and indeed it does, so that now light from the broken porthole is reflected down the ramp and the far end is no longer dark. Go down there to find and pick up another 2 kg weight.

 

Return to the telescope. Get close to it and you can then move to look out the porthole and see a tan tower of stepped construction with trees at its base. Look through the scope and you will see a very blurred image of the tower. Lift the cover on the top of the scope to get a lens for inventory. Now when you look through the scope you see a much improved image, but still blurred.

 

Look around for a glass fronted cabinet. Inside above a yellow triangular high voltage warning icon is a red tapered cylinder with three green stripes on it; this is a resistor, and it goes into inventory. Leave the ship and head down the walkway. About half way down you get a good view of the windmill high on a large boulder—-note that the sails are not rotating--and near its base can be seen the suspended trashcan (the black mark on the rock face is the can’s shadow). Continue moving straight ahead toward the windmill rock and you will come to a metal box with the high voltage icon in it.

 

Click on the tan handle on the right side of the box and hold down the mouse key until a click is heard, then pull the handle and the box lid will rise. Inside is an obvious location for the resistor that you have just put in inventory, so place it there. These are very special resistors that exist only in this game because their values can be set by the switches in their holders. In the Electricity tutorial under the Current, voltage, resistance section of the Electrical Circuit exposition you learn that resistance is equal to voltage divided by current, R=V/A.

 

The voltage is right there on the panel, 760 volts. The amperage value, however, takes a little intuition: you are right under the suspended trashcan, and the plaque on the stucco house on which was the can drawing showed 4 Amp. Using these values the resistance is calculated to be 190 ohms. This is a total value, and since the resistors are in connected series, their values can be set to any pair that totals 190. Push the red ON switch, the red pilot light comes on and the resistance setting switches are activated. Set them so the total is 190 and the green pilot light comes on. Click and hold the tan handle, then push it back to close the box lid, whereupon the trashcan descends and  is revealed to be an elevator.

 

Enter the elevator, push the up button, and click on the door to exit when the elevator stops at the base of the windmill. (What is the energy source that runs the elevator?) The door to the windmill is locked, of course, but you can go around to the shed at the back, in which you find the first of the three generators that you are to work with. It is not in operation. There are switches and transformers on the walls, but with no electricity none of them work. In a corner behind the generator, however, is another 2 kg weight. Now you have the needed 6 kg total, so you must make a weight of that value.

 

Return to the elevator, take it down, step out and turn right to go back to the smithy and the drop forge. When you get there, move the black knob on the forge to raise the hammer lifting lever, hang the weight on it so that it is level and the hammer is up, and go up the ladder to the furnace. Put the three 2 kg weights in the bucket on top of the furnace; the scale will register each weight as you put it in. Go behind the furnace and open the gas valve, then push the FIRE button on the front of the furnace to ignite the gas. The fire produced must be exceedingly hot because it immediately melts the iron weights so that when you pull down the arm that is on the right of the furnace the molten iron flows down to the forge. Go down to the forge and click on the black knob to release the hammer onto the smoking hot metal and forge the 6 kg weight. Use the 20 kg weight to raise the hammer once more, and put the new weight in inventory.

 

It’s back to the side of the stucco house where you can affix the weight to the magnet. Now when you pull the magnet down it stays down and the barrel is clear of the cellar entrance so that you can go in. It is pretty dark in there and the light does not come on if you pull the switch cord; still no electricity. Try raising the trapdoor leading into the house at the top of the ladder. Can't be done, but you can find a key hanging just to the right of it.

 

The last place that a key was needed was to open the lock on the door to the base of the windmill. Go through the routine with the metal box to bring down the elevator, then go up and try the new key with the door lock. It works and you can enter the windmill. Inside there is a shaft coming down to turn the millstone and a power takeoff shaft toward the shed behind, undoubtedly to drive the generator. You are not here to grind grain, so turning the millstone is wasted energy. Slide the block that rests in the millstone shaft slot up the shaft past the catches and the millstone is disengaged. Climb the ladder to the floor above where you can pull a lever that releases the clamps on the windmill shaft cam and the sails and shaft begin to rotate. Go to the shed in back to find that the generator is running.

 

To the left of the generator is a triple locked green door that may be unlocked by a switch to its left. On the right of the green door mounted on the wall is a transformer with an adjustable pickoff on one coil, a damaged voltmeter, and three triangular colored lights that may be turned on one at a time. Tutorials are suggested on magnetism and optical colors.

 

Turn around to the entrance door, to the right of which is a switch with a drawing of a house tacked next to it. Flip the switch to the 1 position.  This drawing could well be the stucco house, and flipping the switch on may supply electricity to it, but rather than going back to check at this time, go out the green door for more exploring. You emerge at the top of a trestle that has tracks going steeply down to an inoperative railcar. Take a moment while at the top to examine what can be seen, which is primarily the Observatory on the left and a village square on the right.

 

At the bottom of the trestle go left to investigate what may be found, including the Observatory and a beached submarine with a bucket of ice on top of it and a large mirror behind it. When you get behind this mirror it will be seen to actually be a parabolic reflector and the red scanner appears on it. Inside the submarine is another idle generator. There is nothing that may be done in this area now, but you have noted several things for future action.

 

Return to the trestle and proceed beyond it through the gate into the village. There are a number of places to inspect around the square; start with the spoked wheel on the pillar at the right. When you are facing the wheel, click on it and the drawbridge goes down. Cross the drawbridge to the wooden walkway and onward around the house to the cellar entrance. Raise the barrel and enter the cellar, pull the light switch cord and now the light comes on. Apparently the switch in the generator shed did indeed supply electricity to the house. With light you can now see several items on a table in the corner to the right of the entrance, one of these being a battery connected to a table lamp. Throw the switch on the top of the lamp; the bulb glows briefly, then goes dark. Evidently you have exhausted what little charge the battery had left. The green scanner indicates that you should put the dead battery in inventory.

 

Return to the square and move straight ahead from the drawbridge to the low stone steps and into the short alley. On the left is a door with a lock for which you do not have the code, but if you do examine it, click on the panel handle to raise it so the arrow cursor to back away becomes visible. Across the alley from the door are some trash barrels, one of which contains a hammer that will doubtless be useful.

 

Leave the alley and turn right to see a house with a display window and a door on which is a mailbox-sized lock (unless it really is a mailbox). Move to it and click on the lock, raising the cover and showing four lens and reflector types below a display screen. Press the red button to begin a rapidly changing random showing of the lenses and their associated light rays, and which pauses briefly once in a while. When this happens you are to click on the lens type displayed, and if you do this correctly in the very short time allowed a red light turns green; do this three times without making a mistake and the changing display becomes static and you can click again on the red button to open the door. However, if you make a mistake a green light becomes red. (The easy way to do this is to pick a shape with the cursor and wait for it to show up in the pause.)

 

Items inside the house indicate that this is an optical shop. You can find a crank on a pedestal under a glass cover, but you can’t remove the cover to get it, though clicking on the cover produces a pleasant note. On the desktop beside the crank the red scanner indicates that something should be placed there, but nothing in inventory will work. Get behind the desk to open the top drawer and get a green filter. Leave the shop.

 

Across the square is a door in which there is a red disk. Move to it and press the disk to open the door, where there is a sandy courtyard and a stone paved walkway. At the far end of the walkway is a wind driven device with wires leading to an electric meter on a table next to it. To the right of the meter is a holder that activates the red scanner, and the only thing electrical in your inventory is the dead battery, which will remain when placed there. Throw the switch on the meter and the needle moves to the upper end of the scale. You have recharged the battery and the scanner is now green, so return the battery to inventory.

 

Back off and turn right. Here you see pair of large double doors, locked of course, as you discover when you get close to the handle to open them. In the crack between the doors you can also the locking bar on the other side. The red scanner is active on the + sign. Return to the village square.

 

You haven’t yet examined the well in the center of the square. Do that, and looking down into it you will see a ladder. (You will also see what appear to be snakes, but are only tree roots.) Climb down the ladder, and before you get to the water at the bottom you can enter a dark tunnel in the well wall. On the side of the tunnel is a cabinet. Open it. [Here the programmers have made an omission: the red scanner is supposed to show near the bottom of the cabinet, but it doesn’t.] Put the battery in the cabinet and close the door. A light is now on and you can proceed into the tunnel, which terminates at a brick wall. Drag the hammer from inventory to the bricks, click on it, and in one blow it will break an opening.

 

When you go through the opening you will be in the village jail, and in fact in a jail cell, as attested by a bed in it. Move to the bed and turn right to the door; when you try to leave the door opens a little, then swings back and locks. Not to worry, someone has very conveniently left three dynamite sticks attached to the lock(!). Get a closeup, then place the lens from inventory in the light coming from the cell window and ignite the hanging fuse; the dynamite explodes without injuring you (or destroying the dynamite), blowing the door open, and you may leave the cell. Go left to find the exit door, then up the stairs to a vestibule.

 

On the left is a door to police headquarters. In it there is a desk that has a key in the lower left drawer, and on top an arrest warrant for a thief at an address that you won't be able to find, though it indicates that it is on the square. He has stolen a lens. On the wall behind the desk is a multitude of case files, and passing the cursor over the black disks will show that you can examine two in the middle row. The one on the left is irrelevant. The other one shows a drawing of a sound source impinging on a bar with the m/s sound velocity desired. Go to the tutorial Acoustics/Sound waves/Speed of sound which shows three examples; of the three, the one in the drawing could only be iron, and the value is given. The drawing also says this is the access code to the thief’s address.

 

Go across the vestibule to the door that leads to the police darkroom. Here you will find three photographs hanging. Get closeups of all three and note the wallpaper pattern in #2. Now find the light on the ceiling and place the green filter in the blank space indicated by the red scanner. Click on this filter to have it replace the red one, and under this light color, code numbers will be seen in photo #3.

 

Leave the darkroom, unlock the vestibule door, go out into the square, and on to the alley where you found the hammer. Click on the round lock cover, then on the panel handle to lower it. Enter the iron sound speed value and again click on the panel handle to raise it. Back off and click on the door latch to open the door. Inside the room are the many objects that the thief has stolen, and from these you want to get a golden sphere that is in a bowl of apples. On the wall is the lady’s portrait of darkroom photo #1 and next to it the wallpaper pattern of photo #2. Click on the right edge of the portrait to have it swing back and reveal the safe of photo #2. Enter the code from photo #3, turn the handwheel to open the safe wherein is the lens for which the arrest warrant was issued. Take the lens, close the safe and the portrait, and leave the house.

 

Recall that you removed a lens from the telescope in the ship, and that the image was not all that clear with or without it. Now you have a replacement lens, so go over the drawbridge and up the ramp into the ship and to the telescope, where you can put the thief’s lens in it. The view is now clear, but much more magnified and limited. You can use your mouse to move it around and you will find that you can look at the double doors that are in the courtyard next to the battery charger. You can zero in on the + and a 5-place code lock beginning with an F. Knowing what the scope is viewing is a good hint that you should go there.

 

Return across the drawbridge to the village square, go through the red disk gate beyond the well, and into the courtyard where the locked gate is. When you get a closeup of the lock, close scrutiny of the + reveals that it is a keyhole, and you have in inventory a key that fits. Insert the key, turn it, and the cover panel moves aside to show the lock. The first place is covered, but you know from the telescope view that it contains an F. You are referred to Mechanics and motion. Call up the tutorial TOC Mechanics/Motion/Force and acceleration, click on the next page arrow below the screen, and the code for the lock is right there as Newton’s second law, Force is equal to mass times acceleration: F=m•a. With the last four of these five characters in place in the lock code, pull on the lever, which swings all the way over and back, the cover slides back over the code, and you are looking at the doors with the locking bar no longer visible in the crack between them. Use the right hand latch to open the door and go through. 

 

Ahead you will see the tower that you saw when looking out the broken porthole of the ship, and a couple of spherical buildings. On the right is another generator, including a transformer on it that is much like the one in the shed behind the windmill, except that the buttons are square. Turn around to explain something that should have puzzled you: how you could have seen the door code lock from the telescope, including the reversed covered F, before you used the key to slide the cover panel back.

 

Proceed toward the water. If you try the doors in the several buildings you will find all of them locked, including the one in the tower. Note that this door has a sun icon over it. Nothing you can do with the generator either, except break off a handle on the other side. The sound of running water is quite pronounced whenever you are next to the generator. When you get to the shore, go out on the pier at the right and read a note in a floating bottle indicating the Observatory lock code as being the density of chlorine. Call up the tutorial TOC for Mechanics/Force, mass, density/Density and click on the next page arrow at the bottom of the screen for the answer.

 

At the shore, instead of going to the pier you can move to the left along a short walkway, and here you will find a door that will open. Go to the puzzle built into the table on the left and place the golden sphere from inventory into the hole at the bottom next to the other two. The layout represents the sun shining on the earth and locations of the eight phases of the moon, three of which are to be selected by placement of the three small spheres.  The key to this puzzle is the sun disk that is on the right pillar of the walkway to the ship, which when opened showed (1) a waning crescent moon, (2) a full moon, and (3) a waxing crescent moon. Access the TOC of tutorial Optics/Light and shadow/Phases of the moon for an animated display of the moon orbiting the earth, with the continual changing illumination of the moon as this happens. Note the position of the moon in orbit when the moon illumination is that of the above three shown in the sun disk, and place the three small spheres in those positions around the earth sphere. If you do it correctly the sun will spin. Do not press the orange button, which resets the puzzle, unless the sun does not spin, in which case you must try again after resetting.

 

The spinning sun leads you to the door in the tower, since it has a sun icon over it. The door is now unlocked, and upon entering it looks as though you have found something of a shrine, with a tuning fork and a striker on the central altar. Use the striker to tap the fork, and if you are musically adept you will recognize the note as being the same as the one from striking the glass cover in the optical shop. That is now the place to go after putting the tuning fork in inventory.

 

After you get to the shop and go through the door lock opening procedure again, enter and put the tuning fork on the desk next to the glass covered crank. Click on the striker to sound the tuning fork and the resonance will shatter the glass and you can pick up the crank. (Reference tutorial TOC Acoustics/Oscillation and sound/Resonance.) There does not seem to be anything to indicate how to use this item, but you have not as yet done anything in the area beyond the trestle and Observatory that you explored earlier, so go there.

 

On the back of the parabolic reflector is a hole that accepts the crank, which when turned moves the reflector to focus concentrated sunlight on the bucket of ice atop the submarine. Climb the ladders to look at the bucket, and observe that the ice has melted and the resulting water is agitated, presumably near the boiling point. There is a piece of pipe on the bottom of the bucket under the hot water.

 

Climb back down and enter the submarine. Turn left to a boiler, then look up to a valve. Turn the valve to the drain the water from the bucket into the boiler and click on the FIRE button on the front of the boiler, whereupon steam makes the generator operational. To the right of the generator is a transformer differing from that the others in that the buttons are round and the voltmeters are unbroken. Go back up to the empty bucket to retrieve the piece of pipe that you can use to replace the handle that broke off the beach generator.

 

While you are here near the Observatory and you have the code for the door lock, you may as well investigate that. Climb the steps and get a closeup of the lock, then click on the panel handle to slide it down. Enter the number for the density of chlorine. (This is the British version of a German game; Europeans usually use a comma instead of a decimal point.) Raise the panel and click on the orange button to open the door. Go up the stairs to the control room. Look over the control panel to see what is there, and look out the window above it to see the impulse machine set to go.

 

However, the most important thing at this time is the sketch tacked to a panel; you have had a glimpse of this drawing in the message left on the communications unit in the beach cottage at the beginning of this game (review it?) in which the scientist behind the rescue effort says it contains the exact figures to launch the impulse machine, and that you must set the transformers to supply the few volts that he could not. The information and formulas that you will need may be found in the tutorial on Electricity TOC chapters and pages.

 

The basic data from the sketch is that you will have to supply the impulse machine 5,000,000 watts at 125 amps from the three generators. Using the formula at the sketch top: W=e·I, it may be calculated that you must generate 5,000,000/125 = 40,000 volts. (Hardly a “few” volts.) Now some investigation is in order.

 

Go to the remaining generator on the beach and put the pipe from inventory in the place where the handle broke off. Click on the pipe to move the large shaft below it and free the waterwheel to rotate and drive the generator.

Go around the generator to the transformer on the other side, which shows that the waterwheel driven generator is putting out 1300 volts as indicated by the voltmeter below the primary coil. The tap on the secondary coil has three positions of 2150, 4050, and 8000 turns, or turns ratios of 2.15, 4.05, and 8, and thus the transformer output is 1300x2.15 =2795 volts, 1300x4.05=5265 volts, or 1300x8=10,400 volts, depending on the tap setting. These voltage values must be calculated because the output voltmeter is broken.

 

In summary, the available voltages to be added, one from each generator, to equal 40,000 are

        Submarine               Windmill                  Waterwheel

       Turns Volts            Turns Volts                Turns Volts

       2000   3040            1500   8250                2150   2795

       5000   7600            2000 11,000                4050   5265

       8000 12,160            4000 22,000                8000 10,400

 

With 40,000 being a nice round number it is not much effort to select 7600, 22,000, and 10,400 as the ones that you want and to set the secondary taps accordingly.

 

While you are at the waterwheel beach generator, set the transformer  secondary coil tap at 8000 turns so the output will be 10,400 volts. Click on one of the square buttons, it does not matter which one as long as you note the shape and color. Go to the windmill generator and  set the transformer secondary coil tap at 4000 turns so the output will be 22,000 volts. Click on one of the triangular buttons, it does not matter which one as long as you note the shape and color. Go to the submarine generator and  set the transformer secondary coil tap at 5000 turns so the output will be 7600 volts. Click on one of the round buttons, it does not matter which one as long as you note the shape and color.

 

Return to the Observatory control panel and move the toggle switch on the left from 0 to 1. The displays above the panel should show the numbers 7600, 22,000, and 10,400. Adjust the colored push switches so the circle, triangle, and square shapes are the colors you chose at the transformers. From the five resistors select the one that produces 125 amps on the meter. Push the red TEST button, and if the green pilot light flashes, you are ready to go. Move the handle on the right from bottom to top and watch the concluding video.

 

 

 

SPOILERS

 

Moon phases puzzle solution

 

 

   The boiling point of water is 373ºK.

 

The velocity of sound in iron is 5.170 meters/sec.

 

   The density of chlorine gas is 3.214 kg/cubic meter.

 

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