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An inventor claims to have developed an engine that takes in 100,000Btu at a temperature of 400 K, rejects 40,000 Btu at a temperature of 200 K, and delivers 15kW . h of work. Would you advise investing money to put this engine on the market?
After fixing a flat tire on a bicycle you give the wheel a spin. If its initial angular speed was 4.92 rad/s and it rotated 13.2 revolutions before coming to rest, For what length of time did the wheel rotate
A coin with a diameter of 2.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 15.5 rad/s and rolls in a straight line without slipping. how far does the coin roll before coming to rest
Four identical charges (+2.9 µC each) are brought from infinity and fixed to a straight line. The charges are located 0.59 m apart. Decide the electric potential energy of this group.
throughout the process the mechanical device pushing the piston to compress gas is found to expend 4 kJ of energy. What is the magnitude of the heat flow between heat reservoir and the gas and in what direction does the heat flow occur.
A negative charge of -0.525%u03BCC exerts an upward 0.205N force on an unknown charge 0.310m directly below it. What is the unknown charge in microcoulombs
In the below figure of two charged plates (parallel), the negative plate is at +0 Volts and the positive plate is at +12 Volts, and the distance among plates is 2 cm. If there is a uniform electric field in between the two plates, what is the magnitu..
A 0.58-kg object connected to a light spring with a force constant of 21.0 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. (Let m = 6.05 kg and ? = 81.0°.) What is the traction force exerted to the right on the leg?
A monochromatic beam of microwaves with a wavelength of 0.052 m is directed at a rectangular opening of width 0.35 m. The resulting diffraction pattern is measured along a wall 8.0 m from the opening. What is the distance between the first- and s..
an electron is released a short distance above the surface of the earth. a second electron directly below it exerts an
q1. a motorcycle has a constant speed of 29.0 ms as it passes over the top of a hill whose radius of curvature is 117
Calculate the magnitude AND direction (angle θ respect to the x-axis shown) of the net electric field at point A for λ = 1.2 nC/m, Q = 2.5 nC, d = 1.5 m.
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