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A construction hoist exerts an upward force of 500 N on an object with a mass of 50 kg. If the hoist started from rest, determine the power it expended to lift the object vertically for 10 seconds under these conditions.
A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 12.0s. What force is required at the edge
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 6.75 10-7 m, What is the maximum acceleration of the eardrum
A 20.33 gram ice cube at -8.87 degrees celsius is placed in an aluminum cup whose initial temperature is 182.02 C. What is the mass in grams of the cup
The temperature of a black body can be estimated based on the wavelength of light that it is emitting, Find the surface temperature of a star
Consider a comet in a long, thin elliptical orbit with a semi-major axis of one AU. Illustrate what can you say about the sidereal period of this comet?
A thin lens has a focal length of 10.00 cm for red light. If the index of refraction for the lens material tends to decrease with increasing wavelength
A cart loaded with bricks has a total mass of 21.2 kg and is pulled at constant speed by a rope. The rope is inclined at 27.2 ? above the horizontal and the cart moves 27.1 m on a horizontal floor. The coefficient of kinetic friction between groun..
assume that a scale is in an elevator on earth. what force would the scale exert on a 57.6kg person on it if the
Water flows through a Venturi meter with a pipe diameter of 10.0 cm, The U-tube manometer is partially filled with mercury, Find the flow rate of the water in the pipe
A spaceship of mass 2.20×106kg is cruising at a speed of 5.80×106m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
470 cm3 of water at 82°C is mixed with 95 cm3 of water at 8°C. Calculate the final equilibrium temperature, Calculate the final equilibrium temperature assumning no heat loss after mixing occurs
Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 30.8 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa
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