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Voyage Hints
How do I use the scale to isolate the lightest isotope?
1 of 11: Your insect friend says that you need to use the scale to separate the lightest isotope. It should be possible to do it in only two weighings.
2 of 11: (Note: It is not required to solve this puzzle in two weighings. In fact, you can make as many weighings as you want; however, you will only get points if you can isolate the lightest isotope in two weighings or less.)
3 of 11: Examine the scale. There are two pans that make up the balance -- one on the left, and one on the right.
4 of 11: The nine isotopes are displayed at the top of the screen when you move into a close-up of the machine.
5 of 11: To begin, drag any number of isotopes to the left and right pans. (It only makes sense to drag the same number of isotopes to each pan, or you won't learn much during the weighing process.)
6 of 11: When you are ready to test them, push the button in the middle.
7 of 11: A symbol will appear on the display, representing one of three results.
8 of 11: If the weight of the two pans is equal, the "=" symbol will be displayed. (This can only happen with the same number of isotopes in each pan.) The machine will then identify each of the isotopes as NOT being the lightest (since they were all equal), and you can move the isotopes around, and begin another weighing.
9 of 11: If the weight of the two pans is unequal, either a "<" symbol or a ">" symbol will appear, indicating which pan was heavier (or lighter) than the other.
10 of 11: Any isotopes in the "heavier" pan (using the two symbols to represent "less than" and "greater than", as in mathematical expressions) will be returned to the top of the screen, and marked with a red check mark, indicating that none of them can be the lightest isotope. All of the isotopes in the "lighter" pan will be returned to the top with no check mark, since it is still unknown which of them might be the lightest. (Only in the case of a single isotope being in each pan would the first weighing possibly be able to identify the lightest isotope of the nine.)
11 of 11: Continuing weighing any isotopes that have not yet been marked with a red check mark, until you have identified which single isotope is lighter than the others.
