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An athlete grips a light rope that passes over a low-friction pulley attached to the ceiling of a gym. A sack of sand precisely equal in weight to the athlete is tied to the other end of the rope. The athlete climbs the rope, sometimes speeding up and slowing down as he does so. What happens to the sack of sand? Explain.
A shop sign weighing 245-N is supported by a uniform 155-N bean. Find out the tension in the guy wire, and the horizontal and vertical forces exerted by the hinge on the bean.
A particular Bohr orbit in a hydrogen atom has a total energy of -0.54eV. What is the electric potential energy of the system
A ruler of mass m = 75g and L=3.0meters is placed so that it is exactly balanced across two spinning cylinders a distance d = 1.0meters apart. What is the frequency of oscillation in the ruler
A building having a steel infrastructure is 5.94 102 m high on a day when the temperature is 0.00 °C. How much taller is the building on a day
A converging lens of focal length 0.25 m forms a virtual image of an object, What is the distance between the object and the lens
Suppose a grower sprays 7.2 kg of water at 0 °C onto a fruit tree. How much heat is released by the water when it freezes
A light plane is headed due south with a speed of 190km/h relative to still air. After 1.00 hour, the pilot notices that they have covered only 137km, What is the wind velocity (magnitude)
consider a direct vision prism. if a crown component n = 1.523 has an apex angle of 11. what is the apex angle of the flint component n = 1.72
What is an initial velocity of the boulders
question1an object floats with half its volume beneath the surface of the water. the weight of the displaced water is
Compute the camels eastward displacement
What is water speed along the boat during the vertical cross
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