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A hiker, who weighs 642 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3710 N, and rests on two concrete supports, one on each end. He stops 1/3 of the way along the bridge. What is the magnitude of the force that a concrete support exerts on the bridge (a) at the near end and (b) at the far end?
A 6.0 centimeter tall cylinder floats in water with its axis perpendicular to the surface. Determine what is the cylinder mass density
In the air over a particular region at an altitude of 500 m above the ground, the electric field is 130 N/C directed downward. At 600 m above the ground, the electric field is90 N/C downward. What is the average volume charge density in the layer of ..
a 70-kg bicyclist coasts down a hill that makes a 10degree angle with the horizontal at a speed of 10 ms.a if the drag
Two tuning forks are played at the similar time in a room where the velocity of sound is 340 m/s. One of them has a frequency of340 Hz and the other a frequency of 360 Hz. What is the beat frequency? What is the successive time among beats?
a piano wire with mass 3.00 g and length 80.0 cm is stretched with a tension of 25.0 n. a wave with frequency 120.0 hz
A man's leg can be thought of as a shaft of bone 1.2m long. If the strain is 1.3x 10^-4 when the leg supports his weight, by how much is his leg shortened
A five-slit system with 7.8 um slit spacing is illuminated with 615 nm light. Find the angular positions of the first two maxima
an 80 mm segment of wire is at an angle of 53 degrees south of a westward 2.3-t b field. what is the magnitude of the
a small coil has a cross section of 5.5 cm2 and consists of 18 turns of wire. if the loop carries a current of 100 ma
around the core of a nuclear reactor shielded by a large pool of water cerenkov radiation appears as a blue glow.
A positive charge of 4.80 C is fixed in place. From a distance of 3.60 cm a from the fixed positive charge, a particle of mass 5.70 g and charge +3.70 C is released from rest.
A barber's chair with a man it weighs 2100 Newton. The output plunger of a hydraulic system begins to lift the chair when the barber's foot applies a force of 55 Newton to the input piston. Find the ratio of the radius of the plunger to the piston
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