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A heat pump uses an ideal Carnot cycle to heat a house. The outside air has a temperature of 292 K and the house is kept at a temperature of 303 K.
1) What is the coefficient of performance of this heat pump?
2) If the heat pump does 1700 J of work on the working substance, how much energy is transferred into the house?
3) In the scenario described in the previous question, how much energy is transferred out of the outside air?
A plane is headed due west with an air speed of 224 m/s. Find the velocity of the plane relative to the earth
Violet light and red light travel through air and strike a block of plastic at the same angle of incidence, find the index of refraction for violet light in plastic
A converging lens of focal length 7.930cm is 16.6 cm to the left of a diverging lens of focal length -6.0cm. A coin is placed 12.60cm to the left of the converging lens. Determine the location of the coin's final image.
An airplane travelling 1001 m above the ocean at 125km/hr is to drop a box of supplies to shipwrecked victims below. How various seconds (t) before being dropped directly overhead should the box be dropped.
A 9 m, 220 N uniform ladders rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50° angle with ground. How far up the ladder can an 850 N person climb before ladder beg..
Neglect air resistance, as well as any energy absorbed by the pole, and clarify her altitude as she crosses the bar.
A speeding motorist traveling 100km/h passes a stationary police officer. The officer immediately begins pursuit at a constant acceleration of 12km/h/s (note the mixed units).
A 40 kg child sits in a swing suspended with 2.5 m long rope. Use energy conservation to determine the speed the child will have at the bottom of the arc when she is let go
A small car is pushing a larger truck that has a dead battery. The mass of the truck is twice as large as the mass of car. At one instant of time the car and truck both have an acceleration of 3.5 m/s2. Which of the following statements is true? D..
A rabbit runs in a straight line with a velocity of +1.6 m/s for a period of time, rests for 9 s, and then runs again along the same line at +0.55m/s for an unknown amount of time. The rabbit travels a total distance of 1116m, and its average spee..
A light bulb is placed 22.3 cm in front of a concave mirror. Calculate the focal length of the concave mirror
a spring contant k=11.75 N/m is hung vertically. What is the displacement of the end of the sprig due to the weight of the 0.500kg mass
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