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On a winter day heat leaks out of a house at the rate of 2.5x10^4 kcal/h. The temperature inside the house is 21 d celsius and the temperature outside is -5 d celsius. At what rate does this process produce entropy?
Dan is gliding on his skateboard at 2.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
The water system in a town is designed by a careless engineer. He places the new water tower at the top of an extremely tall hill, Calculate the minimum height of the water level in the tower
A 47-g golf ball is driven from the tee with an initial speed of 52.0 m/s and rises to a height of 24.2 m.
100.0 W tungsten filament bulb generates 95.0 W of heat, which dissipated through glass bulb which has radius of 3.00 cm and 0.500 mm thick. If thermal conductivity of glass is 0.836 W/m°C, determine difference in temp. between inner and outer sur..
An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell (r >> R). What initial speed v0 is needed for the electron to just reach the shell before reversing direction.
What does it means when I say that a light truck and a heavy truck have the same momentum, What is renewable energy
A long, straight wire carries a 25.0 current. An electron is fired parallel to this wire with a speed of 280 in the same direction as the current, 2.30 from the wire.
In an electron microscope, there is an electron gun that contains two charged metallic plates 2.90 cm apart. Determine the acceleration of the electron
I just got this wrong for the third time. A u-tube manometer is used to measure the pressure of a vessel under vacuum. Assume the manometer is open to atmospheric pressure.
What is the sound level of a sound whose intensity is 6.5 × 10-8 W/m2, What is the intensity of a sound whose sound level is 30 dB
A 3.0x10 ² kg piano is being lifted at a steady speed from ground level straight up to an apartment 10 m above the ground. How much time does it take to lift the piano
A proton is initially at rest at a point where the potential is 515V. Sometime later the proton is at a point where the potential is 190V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy.
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