1. Consider a plane that flies due east on a trip, and then returns due west following the same exact route. Imagine also that there are no winds in each trip. Flying due east, the plane flies with the rotation of the Earth, while flying due west, it flies against the rotation. Will the flight times be the same? Different? Why?
2.The velocity of an object falling in free fall increases with time. Does the acceleration also increase? Why or why not?
3.Why is that a cat that accidentally falls from a 50-story building hits a safety net below with the same speed as if it fell from a 20-story building?
4.What is the acceleration at the top of a jump?

1) A gas changes its state quasi-statically from A to C along the paths shown in the figure below. The work done by the gas is
2) When 23 cal of heat are absorbed by a gas, the system performs 25 J of work. What is the change in the internal energy of the gas?
3) An ideal gas is allowed to expand isothermally until it reaches its final volume. It is then heated at constant volume until it reaches its final pressure. The initial state of the gas is P1 = 3.25 atm, V1 = 1.00 L, and Eint 1 = 470 J, and its final state has volume V2 = 3.25 L and Eint 2 = 974 J.
a) Calculate the work done by the gas. Be careful with signs: if the work you calculate turns out to be, for example, -50 J in our sign convention, this means that 50 J of work were done by the gas.
b) Find the heat absorbed by the gas during this process.

In a two-page paper, research three examples of technologies that use quantum mechanics. Explain, in your own words, how these applications impact society. If you or someone you know has ever had an MRI scan for a medical diagnosis, you have experienced the result of quantum physics for measuring bodily structures. Finally, provide another specific example from your own life that could be influenced by these applications.