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To make ice, a freezer that is a reverse Carnot engine extracts 50 kJ as heat at -15°C during each cycle, with coefficient of performance 5.7. The room temperature is 30.6°C.
(a) How much energy per cycle is delivered as heat to the room?
kJ
(b) How much work per cycle is required to run the freezer?
A spring with spring constant 34N/m is attached to the ceiling, and a 4.6-cm-diameter, 1.4kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
How long can craft hover over the moon surface Contract between Einstein's calculations and observed precession
what are the wavelengths of electro magnetic waves in free space that have frequencies of a) 5.00 x 10^19Hz, b) 4.00 x 19^9.
A 0.300 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.750m/s when it makes a head-on collision with a stationary 0.150 kg glider, Find the final kinetic energy of first and second glider
Illustrate a new gravitational potential energy
Consider a 10.0 kilogram block of copper, specific heat = 387 J/kg*C. The initial temperature of the copper is 25*C, obtain the final temperature of the block
The vector A s 3.50cm long and is directed into this page, In the right-handed coordinate system, where the +x-axis directed to the right, the +y-axis toward the top of the page
Your telescope has a 700mm-focal-length objective and a 26-mm-focal-length eyepeice, You position film so that it caputures the image produced by the objective lens. What is the diameter of that image
In which scenario do you experience the larges acceleration? Explain why using physical principles you have learned.
Capacitors C1 = 5.60 µF and C2 = 2.45 µF are charged as a parallel combination across a 250 V battery, Calculate the resulting charge on each capacitor
Suppose a car is traveling at 14 m/s, and the driver sees a traffic light turn red. After 0.50 s has elapsed (the reaction time) the driver applies the brakes and the car decelerates at 8.0 m/s2.
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 16.0 cm, find electric feild just outside paint layer
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