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A certain freely falling object requires 1.45 s to travel thelast 38.0 m before it hits the ground. From what height above theground did it fall?
A ship sets out to sail to the point 158 km due north. An unexpected storm blows the ship to a point 134 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive an..
A dentist's chair of mass 234.0 kg is supported by a hydraulic lift having a large piston of cross-sectional area 1596.0 cm2. What force must be applied to the small piston
A Styrofoam cup holding 135 g of hot water at 93°C cools to room temperature, 22.0°C. What is the change in entropy of the room
A mountain climber looks up a slope and sees an avalanche ofboulders accelerating toward her. The boulders are initially60.0m above, moving at an initial speed of 2.00m/s and acceleratingat 4.00m/s^2.
A submarine dives to a depth of 157 feet in the ocean. What is the force (in pounds) acting on a hatch
A person undergoing radiation treatment for a cancerous growth receives an absorbed dose of 1.8 Gy. All the radiation is absorbed by the gowth. Determine the rise in temperature
A space traveler weighs 750 N on earth. Illustrate what will the traveler weigh on another planet whose radius is three times that of the earth and whose mass is twice that of the earth.
Absolute zero is only theoretical because
Refrigerant 22 is used as the working fluid in an ideal vapor-compression refrigeration cycle. Saturated vapor enters the compresssor at -40°C at a flow rate of 1 kg/s. What is the power input to the compressor
A flywheel rotates at 7200 rev/min when the power is suddenly cut off. How many revolutions does the flywheel makes before coming to rest
A runner wearing spiked shoes pulls a 18 kg sled across frictionless ice using a horizontal spring with spring constant 170 N/m. What is the acceleration of the sled
A refrigerator does 18.0 kJ of work while moving 115kJ of thermal energy from inside the refrigerator. what is its coefficient of performance
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