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You are holding a 35 kg dumbbell straight out at arm's length. Assuming your arm is 0.74 m long, what torque is the dumbbell exerting on your shoulder?
A 72 kg man in a 5-kg chair tilts back so that all weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with the radius of 1.0 cm, and find out the pressure exerted on the floor by eac..
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.979 rad/s. You, with a mass of 70.3 kg, walk clockwise around the platform along its edge at the speed of 1.11 m/s with respect to the platform. Calculate the ..
Sam, whose mass is 71.0kg , takes off down a 45.0m high, 8.00? slope on his jet-powered skis. What is the coefficient of kinetic friction of his skis on snow
A converging lens with a focal length of 30cm and a diverging lens with a focal length of -52cm are 127cm apart. Calculate the distance between image and diverging lens
A styrofoam cooler (K = .030 W/mo C) has an average surface area of 0.338 m2 and an average thickness of 2.8 cm. How much heat is required to melt the ice in the cooler
A copper-bottomed kettle, its bottom 24 cm in diameter and 3.0 mm thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 800 W.
A 150g steel ball and a 300g steel ball each hang from 1.0-m-long strings. At rest, the balls hang side by side, barely touching. To what angle does each ball rebound
q1. revolutionary war cannon with a mass of 2220 kg fires a 22.7 kg ball horizontally. the cannonball has a speed of
Find the approximate mass of the dark and luminous matter in the Milky Way galaxy. Assume the luminous matter is due to approximately 1011 stars of average mass 1.5 times that of our sun
A spaceship moves past you at speed v. You calculate the ship to be 364 m long, whereas an astronaut on the ship measures a length of 420 m. Find v.
A Styrofoam box has a surface area of 0.87 m2 and a wall thickness of 2.0 cm. determine the thermal conductivity of the Styrofoam
A system does 136 J of work on its environment and gains 66 J of heat in the process. compute the change in the internal energy of the system
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