Wind, solar and geothermal power are called renewable energy sources because . a. tax breaks for these sources are renewed every year b. they are continuously replenished c. humans can replenish these sources periodically d. they produce few toxic byproducts

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.