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A Carnot engine extracts 950J from a 600K reservoir during each cycle and rejects 480J to a cooler reservoir. It operates at 22 cycles per second.
Part A Find the work done during each cycle.
Part B Find its efficiency.
Part C Find the temperature of the cool reservoir.
Part D Find its mechanical power output.
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 9.8s, What force is required at the edge
An LC circuit is built with a 50mH inductor and an 8.0pF capacitor, The capacitor voltage has its maximum value of 40V at t=0s, What is the inductor current at that time
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B?
Illustrate what is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer.
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
A wood block floats on water with 35% of its volume above the surface (of water), what is the average density of the block (in kg/m3)
If, as is typical, each of them breathes about 500 {rm{ cm}}^3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year.
A block weighing 15.0 N rests on the floor. What force does the floor exert on the block
290 Kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40.
An electric water heater operates at 66 A and 16 kilowatts, Calculate N (the total number of resistors) and the cost of manufacturing the heating element if in a pack of 100 resistors cost $0.50
When you push a 1.95kg book resting on a tabletop it takes 2.50N to start the book sliding. Once it is sliding, though, it takes only 1.50N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction betwe..
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