A spacecraft moves at 2/5 of the speed of light (.4c) relative to the Earth, when its headlights are turned on. An observer on the Earth will observe the headlights moving at speed .

Amachine, modeled as a simple spring-mass system, oscillates in simple harmonic motion. its acceleration is measured to have an amplitude of 5,000 mm/s with a fre- quency of 10 hz. compute the maximum displacement the machine undergoes during this oscillation.

Which two objects have the greatest gravitational force acting between them

In the 1980's, congress authorized the u. s. department of energy to build the wipp facility in the chicuahuan desert in new mexico. what is the purpose of wipp?