Find the volume of a slab whose dimensions are l=45.24 cm, w=23.981cm, h=2.33002 cm in proper significant digits

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.