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e. if you knew the pressure, volume, and temperature of the helium in the balloon, what equation would you use to determine its number of moles? (2 points)
f. your friend's mom has a great new car. what type of device does it use to move? describe how this device operates, in terms of the second law of thermodynamics. (3 points)
g. the heat is getting to your friend. you start to share your iced drink with her, but the ice has disappeared! what phase change did the ice cubes undergo? what happened to the ice's molecules during this phase change? if the drink continued to heat, what would be its next phase change? (3 points)
h. did the entropy of the ice cubes increase or decrease over time? explain your answer, including a definition of entropy. (3 points)
6.a. the following is a nuclear equation for which type of decay process? (1 point)
235 92 u --> 4 2 he + 231 90 th
b. describe this type of decay process. what are the other two types of decay? how are the types of decay different? (4 points)
c. what is the name for the length of time of a decay process? how can this be used to calculate the amount of a radioactive element, compared to its original amount? (4 points)
7.a. describe einstein's famous equation, e = mc2, using two well-known conservation laws. give an example of when you would use this equation. (4 points)
b. describe fission and fusion. explain how einstein's equation relates to the concepts of fission and fusion. (5 points)
8. describe an alternative energy source that involves the earth. (2 points)
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Plz will give brainliest and 85 points and u can answer one at a time if u want
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