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A Carnot refrigerator absorbs heat from a space at 15 degrees C at a rate of 16000 kJ/h and rejects heat to a reservoir at 36 degrees C. Determine the COP of the refrigerator, the power input (kW) and the rate of heat rejected to the high temperature reservoir (kJ/h).
A total charge of 14 mC passes through a cross-sectional area of a nichrome wire in 2.8 s. If the number of charges that pass through the cross-sectional area during the given time interval doubles, what is the resulting current
The image behind a convex mirror (radius of curvature = 72 cm) is located 14 cm behind the mirror. Where is the object located? What is the magnification of the mirror?
A hockey puck struck by a hockey stick is given an initial speed of 10 m/s. how far will the puck slide before stopping
An empty storage tank has a volume of 135 ft3. What is the buoyant force exerted on it by the air
A spaceship leaves Earth traveling 0.70c. A second spaceship leaves the first at a speed of 0.88c with respect to the first. Calculate the speed (including sign) of the second ship with respect to Earth
A 19-kg chandelier is suspended from the ceiling by four vertical steel wires. Each wire has an unloaded length of 5 m, how far do the wires stretch
The coefficient of volume epansion for diesel is 9.5*10 to the power of negative 4 degrees celcius an the coefficient of linear expansion for the steel truck is 11 times 10 mto the power of negative 6 degrees celcius.
a balloon filled with one liter of air is tied to a brick and dropped from a height of 4600m above sea level. what will be the volume of the baloon when it reaches sea level
A 2.40-kg textbook is forced against a horizontal spring of negligible mass and force constant 300 N/m , compressing the spring a distance of 0.260m. find how far the textbook moves from its initial position before coming to rest
The sun produces its power from the conversion of mass into energy by Einstein's equation E=mc2 where c=3x10^8 mls. the sun's intensity on the earth is 1346W/m^2, find the rate at which mass is being converted to energy in the sun
Consider Joule's experiment described in the insight below. Assume the mass m = 2.5 kg and the fluid is water with a volume of 1.19 L. What is the increase in the temperature of the water
The magnetic force per meter on a wire is measured to be only 27% of its maximum possible value.Calculate the angle between the wire and the magnetic field.
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