Which of the following best describes what is “relative” in the theories of relativity? a. Measurements of time and motion change relative to their frame of reference.
b. Everything is relative.
c. The speed of light is relative.
d. Antimatter twins are relatives.

True or false a high force means an object is moving fast100 points!

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct