A 50 gram bullet traveling 200 m/s hits and sticks (as shown) to an apparatus originally at rest. The apparatus has a rotational inertia of 10 kgm2. Determine the angular speed of the bullet and apparatus after the collision. My teacher briefly went over something similar, but I was really confused. A good explanation on how to do it would be greatly appreciated! Thanks so much!

Which best describes the difference between internal and thermal energy?

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.