Imagine a rocket that has the ability to move close to the speed of light. This rocket is traveling at 0.78 c. 

2. A clock is on the rocket. How much time would a stationary observer measure 60.00 seconds of elapsed time on the clock?
4. A piece of metal that is 1.63 meters long is on the rocket. How long would this piece of metal appear to a stationary observer?

Remember to show work and provide answers with correct units. 2. A photon with a frequency of 5.57 E14 Hz strikes a photoemissive surface whose work function is 1.75 eV. Planck's constant is 4.14 E15 eV s.

2. Calculate the energy of the photon.
4. Calculate the maximum kinetic energy of the ejected photoelectron.
6. Calculate the threshold frequency for the material.

Remember to show work and provide answers with correct units. 3. Describe the concept of thermal equilibrium.

2. Give your own example of a thermal equilibrium.
4. 250 mL of water at 35 C was poured into a 350 mL of water at 88 C.

The final temperature of this mixture was measured to be 67.22 C. Is this final temperature possible? Justify your reasoning.