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The horsepower rating commonly used for engines indicates the rate at which they can do work. A one-horsepower engine can do 746 J of work each second. A lawn mower has a 6.50 horsepower engine that runs at 3800 rpm. Each revolution of the engine represents one engine cycle.
(a) What amount of work does the engine do on each cycle?
(b) If the hot reservoir of the engine supplies 142 J of heat each cycle, hot much heat must the engine expel to the cold reservoir?
A factory worker pushes horizontally to the right on a 250 N crate with a force of P = 75.0 N on a horizontal rough floor. A 135 N crate rests on top of the one being pushed and moves along with it. Call the bottom crate {rm A} and the top crate {..
A light source emits two spectral lines: one at 528 nm and one at 667 nm. what is the distance between the two spectral lines in the first order spectrum
Assuming the diver has inhaled a negligible amount of air from the tank, what is the temperature of the ocean water.
an electron and a proton are each accelerated through a potential difference pf 10.0 million volts. Find the momentum ( in MeV/c) and the kinetic Energy ( in MeV) of each and compare with the results of using the classical Formular.
An electron and a positron, each moving at3.0×105m/s, collide head on, disappear, Determine the momentum of each photon
Four charged particles rest at the corners of a square of side a = 0.30 m. Charges 1 through 4 are 10, 20, 30 and 40 µC, Determine the electric field at the center of the square
A meter stick, sitting on a frictionless table top, is struck by a wad of clay with a force, F = 4.0 N at an angle. The meter stick will rotate in the plane of the table. Conclude the magnitude of the torque about the axis of rotation located at t..
A child goes down a playground slide with an acceleration of 1.34 m/s2. Compute the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 34.0° below the horizontal.
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
An airplane needs to reach a velocity of 487 km/h to take off. On a 2000 m runway, what is the least acceleration necessary for the plane to take flight.
how do you know if the far point is the object distance (So) or the image distance (Si) in a problem, Calculate the focal length of Sam's glasses
calculate the speed of sound and uncertainty of the speed of sound for a lab report. The equation for the speed of sound is V=4LS
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