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Superman leaps in front of Lois Lane to save her from a volley of bullets. In a 1-minute interval, an automatic weapon fires 148 bullets, each of mass 8.0 g, at 350 m/s. The bullets strike his mighty chest, which has an area of 0.72 m2. Find the average force exerted on Superman's chest if the bullets bounce back after an elastic, head-on collision.
An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. how much kinetic energy did each piece acquire
a. questions for weekly discussions and conversations not part of the required discussion board assignmentthese
A block of mass M, at rest on a horizontal fictionless table, is attached to a rigid support by a spring of constant K. obtain the amplitude of the resulting simple harmonic motion
You measure an electric field of 1.32*10^6 N/C at a distance of 0.156m from a point charge. What is the magnitude of the charge
A 3.00 kg mass resting on a level table top is pulled along by a horizontal force of 16 N and accelerates at 4.00 meters per second per second. What is the force of friction between block and table.
Nancy pulls box with 6 N force northward; Edward pulls with 4N force eastwood and Sally pulls with 5N force 36.9 degrees south of west
A blood transfusion is being set up in an emergency room for an accident victim. What is the distance h above the victim's arm where the level of the blood in the transfusion bottle should be located
The truck slows down uniformly with an acceleration of 5.60 m/s2 for 4.20 s, making skid marks 62.40 m long that end at the tree. With what speed does truck then strike the tree.
q1. a stone thrown upward from the top of a 108 ft cliff at 132 ftsec eventually falls to the beach below. for this
A46dB sound wave strikes an eardrum whose area is4.0multiplied by10-5m2. How much energy is absorbed by the eardrum per second
Show that with equal values for the object and image distances (Do=Di), they must both be equal to twice the focal length: Do=Di=2f. What is the predicted magnification
A ball with a horizontal speed of 1.25m/s rolls off a bench 1.00m above the floor. How long will it take the ball to hit the floor
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