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A Carnot cycle heat engine uses steam as the working fluid and has a thermal efficiency of 20%. Heat is transferred to the working fluid at 250 degrees Celsius and during this process the working fluid changes from saturated liquid to saturated vapor. Please calculate the quality at the beginning and end of the heat-rejection process, and calculate the work per kilogram of steam.
To get the top spinning, its string is pulled with a tension of 0.30. Explain how long does it take for the top to complete the first five revolutions? The string is long enough that it is wrapped around the top more than five turns.
A factory worker pushes a 30.2kg crate a distance of 5.0m along a level floor at constant velocity by pushing downward at an angle of 30? below the horizontal. What is the total work done on the crate
Determine the magnitude of the force experienced.
A flywheel in a motor is spinning at 580 {rm rpm} when a power failure suddenly occurs. The flywheel has mass 40 {rm kg} and diameter 75 {rm cm}.
A 212-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. evaluate the tension in the rope
A solid wood door 1.00m wide and 2.00m high is hinged along one side and has a total mass of 43.0kg. Find the angular speed of the door
A person with a near-point distance of 32 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
A -6.00 µC charge is moving with a speed of 8.20 104 m/s parallel to a very long, straight wire, Find the magnitude and direction of the force on the charge.
Estimate the thickness of lead shielding needed to reduce the exposure rate 2.5 m from a 5.92x10^11 Bq point source of Cs-137 to 1.0 mR/hr.
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
The potential difference between two parallel conducting plates in vacuum is 475 V, What is the kinetic energy of the alpha particle when it reaches the other plate
Determine the highest speed the stone can attain without breaking the string.
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