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A plank 2.00 cm thick and 13.7 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 79.9 kg is forced to stand on the very end. If the end of the board drops by 5.40 cm because of the man's weight, find the shear modulus of the wood.
A 80.0cm3 box contains helium at a pressure of 2.30atm and a temperature of 90.0?C. What is the final pressure in each box
Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. Estimate the net force that ultimately stops the person
Estimate the volume of your body. (Consider your body to be a cylinder having a radius of about 6 inches (or 0.15 m) and a height of about 1.5 meters
Calculate the probability of finding the electron in the ground state of hydrogen at less than one Bohr radius from the nucleus
A circular saw blade 0.180m in diameter starts from rest. Find the angular acceleration and the angle through which the blade has turned in this time
Two 4.0kg masses are 1.0m apart on a frictionless table. Each has 1.0?C of charge. What is the initial acceleration of each mass if they are released and allowed to move
A disc has a radius of 2.20 cm and a mass of 27.0 grams and is initially at rest. Starting at time t=0, two forces are applied tangentially to the rim as indicated, calc the moment of inertia of the uniform disc
A mini-fridge needs to maintain a temperature of 277 K. The air outside the mini-fridge has a temperature of 292 K. What is the power output (that is, the work done per second) of the compressor in the mini-fridge
Two balls are rolled off the tabletop that is 0.75m above the floor. how far does each ball travel horizontally before hitting the floor
A playground merry-go-round is a disk of radius 4.0 m and mass 5,0 x 102 kg, initially stationary. what is the resulting angular velocity
A crate of potatoes of mass 8.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.72 and μk = 0.43. Find the frictional force (magnitude and direction) on the crate if the crate is sliding up t..
A thin metallic shell of radius 40 cm has a charge of -25 nC on it. At the center of sphere is a point charge of 35 nC. What is the electric field 15 cm from the center of the shell.
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