A small object is attached to a horizontal spring, pushed to position x=−A , and then released. The object undergoes simple harmonic motion with period T. How long does it take for the object to travel a total distance of 3A ? 12T 14T T 34T 54T Now assume that the object is initially at x=0 and given an initial velocity such that it oscillates with the same amplitude A. Relative to your previous answer, how much does the time to travel 3A change under these new conditions? The time will increase by 12T . The time will increase by 14T . The time will decrease by 12T . The time will decrease by 14T . No change in the answer.

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An charge with mass m and charge q is emitted from the origin, (x, y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit