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An electric current heats a 335 g copper wire from 25oC to 100.oC. How much heat was generated by the current? The specific heat of copper is 0.390 J/(g.Co).
An engine goes through a cyclic process. In the process, the engine does 700 J of work and has a heat output of 2200 J. What is the efficiency of the engine?
A 13g bullet traveling 221 m/s penetrates a 2 kg block of wood and emerges cleanly at 160 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
a 2500-kg truck moving at 10 ms strikes a car waiting at a traffic light hooking bumpers. the two continue to move
Jamal pulls a 200N sled up a 28° slope at a constant speed by a force of 100N. Near the top of the hill he releases the sled, With what acceleration does the sled go down the slope
A 3.00-kg block starts from rest at the top of a 33.0° incline and slides 2.00 m down the incline in 1.75 s. Find the frictional force acting on the block
A scuba diver is 42 m below the surface of a LAKE, where the temperature is 5°C. He releases an air bubble with a volume of 13 cm3. What is the volume of the bubble
You're a production engineer in a cookie factory, where mounds of dough drop vertically onto a conveyer belt at the rate of one 14 mound every 2 seconds. What average force must the mechanism exert on the belt
What is the significance of the negative sign in the equation E- = -∇ V ?
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 87.0 m/s2 for 1.95 seconds, What maximum altitude (above the ground) will the rocket reach
A string length 2.0 m and linear mass density 25.0 mg/m vibrates at a fundamental frequency of 450.0 Hz. What is the speed of the transverse strin waves
Discuss how the results of the photoelectric effect experiment would differ if light behaved purely as a wave.
A motorcycle accelerates uniformly from rest and reaches a linear speed of 22.0 m/s in a time of 9.0 s. What is the angular acceleration of each tire
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