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Q1. An engine does 20000 J of work and rejects 6120 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir?
Q2. A string of 11 identical Christmas tree lights are connected in a series to a 128v source. The string dissipates 78 watts. What is the equivalent resistance of the light string?
Q3. If the accelerating plates are 2.9 cm apart, and have a potential difference of 28,000 V, what is the magnitude of the uniform electric field between them?
What is velocity relative to the ice surface
What is an angular speed of the small cylinders, which is between two inner and outer cylinders
What is the magnitude of the runner's total displacement . What is the phase difference between the two waves next they reach the observer.
What is electric field in the wire
Find speed of the block at the bottom of the ramp. What is tangential acceleration of a bug on the rim of a 78 rpm record of diameter 7.41 in. if the record moves from rest to its final angular speed in 4 s.
Establish the average net force
Defined time necessary for one complete oscillation
Find out that the value of the gravitational field strength
Some athletes can put out as much as 800 watts in short bursts. If you could sustain such energy output long enough to reach the top of a mountain, how much time would it take you to get there from the valley, 3000 meters below the peak? So how does ..
A 3.10-m-long, 310 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 73.0 kg construction worker stands at the far end of the beam. What is the magnitude of torque abou..
A cube of ice is taken from the freezer at -9.4°C and placed in a 94 g aluminium calorimeter filled with 315 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of ice cube.
A 32.0 kg hammer strikes a steel spike 2.70 cm in diameter while moving with speed of 24.0 m/s. The hammer rebounds with speed 11.0 m/s after 0.110 s. What is an average strain in the spike all through the impact.
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