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1. Make two free body diagrams for a falling coffee filter: one at the instant when it is released and the other after it has reached terminal velocity. Your diagrams should include numerical values...

1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...

A heat pump is used to keep a house warm at 22 degrees Celsius.   (a) How much work is required of the pump to deliver 2900 J of heat into the house if the outdoor temperature is 0 degrees...

A 10-g sample of a cookie is allowed to dry before putting it in a bomb calorimeter. The aluminum bomb has a mass of 0.615 kg and is placed in 2.00 kg of water contained in an aluminum calorimeter...

The value of specific heat for copper is 390 J/kg⋅C°, for aluminum is 900 J/kg⋅C°, and for water is 4186 J/kg⋅C°.   (a) What will be the equilibrium temperature in degrees Celsius when...

1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...

At a building site, an iron girder of mass 400 kg is suspended from a crane by a steel cable. Assume that the cable has a circular cross-section of diameter 24 mm. a.What is the tensile force...

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