If you throw a ball in the air with a Vi=23 and its in the air for 30 seconds, distance it travels is 20 m, what is the Vf once it lands on the ground?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal