Which of the following best describes the use of a non-renewable resource? a. Nuclear energy heats water into steam that turns the turbines of a power plant.,
b. Water falls through openings in a dam turning turbine blades that generate electricity.
c. Wind turbines gather energy from the wind and convert it into electrical energy.
d. The electronic signs along the highway are run by solar power.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

What object a collides with object b and bounces back its final momentum is?

The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?