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A large person sits on a four-legged chair with his feet off the floor. The combined mass of the person and chair is 95.0 kg. If the chair legs are circular and have a radius of 0.400 cm at the bottom, find what pressure does each leg exert on the floor?
a boy weighing 3.9 102 n jumps from a height of 1.80 m to the ground below. assume that the force of the ground on his
A sealed cubical container 22.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 20.0°C
A sample of an unknown substance appears to weigh 15.1 N in air and 9.18 N when immersed in a solvent with density 0.945 g/mL. Find the density of the sample
For the house in Question 3, calculate the infiltration heat losses in Btu/h when ?T = 40°F. What percentage of the heat loss is because of infiltration
A 675 kg elevator starts from rest. It moves upward for 3.48 s with constant acceleration until it reaches its cruising speed, 1.86 m/s
A 4.7-g bullet leaves the muzzle of a rifle with a speed of 334 m/s. What force (assumed constant) is exerted on the bullet
A 20-kg rotating disk of radius 0.30m has an angular momentum of 0.40kg?m2/s. What is the angular speed of the disk
three charges are placed on the y axis. one charge of -2.4 micro-coulombs is placed at y 0 another charge of 1.7
q1. a 48-m length of wire is stretched horizontally between two vertical posts. the wire carries a current of 64 a and
a machinist is using a wrench to loosen a nut. the wrench is 25.0 cm long and the exerts a 17.0 n force at the end of
two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. transferring 1.60 109 electrons from one disk
calculate the change in potential energy of a 88.4 kg man when he takes an elevator from the first floor to 33th floor
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