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On a cold winter's day, heat leaks slowly out of a house at a rate of 20.0kW. If the inside temperature is 22C and the outside temperature is -14.5C, find the rate of entropy increase.
A 120-V motor has mechanical power output of 3.00 hp. It is 80.0% efficient inconverting power that it takes in by electrical transmission intomechanical power.
Suppose that while moving into an apartment you move a refrigerator into place by sliding it across the floor. The refrigerator weighs1566 N and the coefficient of staticfriction between the floor and the refrigerator is 0.48. What is the least force..
A concave mirror is to form an image of the filament of a headlight lamp on a screen 8.00 m from the mirror, How far in front of the vertex of the mirror should the filament be placed
Two ice-skaters, whose masses are 45 kg and 75 kg, hold hands and rotate about a vertical axis that passes between them, Find the angular momentum of the system about it's center of mass
A spotlight at the bottom of a pool emits a cone of light upward 22 degrees wide. n= 1.33, How wide (as angle w) is the cone of ligh outside of the pool
A proton ,a deutron and an alfa particle ,accelerated through the same potential difference ,enter a region of uniform magnetic field moving at right angles to B.(a) compare their kinetic energies .(b) if the radius of the proton’s circular path is 1..
A 1.50cm diameter parallel plate capacitor with a spacing of 0.600mm is charged to 400V. What is the total energy stored in the electric field
The dimensions of the picture on a 35.0 mm color slide are x = 24.0 mm by y = 36.0 mm. How far is the slide from the lens
an astronaunt of mass 67.3 kg is on a space walk to repair a communications satellite. suddenly she needs to consult
calculate the specific heat of a metal. in jkg.k from the following data. a container made of the metal has a mass of
If the police car accelerates uniformly at 3.00m/s^2 and overtakes the speeder after accelerating for 9.00 s, illustrate what was the speeder's speed?
The invaders’ thermometer shows the temperature on earth to be 58 °I. Using logic similar to that in Example 1 in the text, illustrate what would this temperature be on the Celsius scale?
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