Jessica says, "In an elastic collision the kinetic energy of the objects is conserved so that the total kinetic energy before the collision is the same as it is after the collision. Don't you agree, Josh?" Josh says, "Yes, I agree, but for an inelastic collision, momentum is not necessarily conserved and a heavier object will have a smaller change in momentum than a lighter object. If the masses are equal," he argues, "the momentum will be conserved in an inelastic collision."Who is right?a. Jessicab. Joshc. Bothd. None of them

The step-down transformer gives a current of 10a at 24v if the primary voltage is 240v calculate the 1_primary current 2_the power input 3_the power output

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.