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As a gasoline engine is running, an amount of gasoline containing 14,400 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,600 J of work.
(a) What is the engine's efficiency (in percent)?_______________________ %
(b) The burning gasoline has a temperature of about 4,400°F (2,700 K). The waste heat from the engine flows into air at about 86°F (303 K).
What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?________________%
Each plate of a parallel-plate capacitor is a square of side 0.0339 m and the plates are separated by 0.407 × 10-3 m. Find the electric field strength inside the capacitor
A hawk flies in a straight line, a diostance of 15 km in 6 hr. its speed is
A small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
A satellite of mass M = 270kg is in circular orbit around the Earth at an altitude equal to the earth's mean radius (6370 km). What is the gravitational force on the satellite
What was most compelling to you in this course? Is there anything you are uncertain about as it relates to physical security?
Helium gas with a volume of 2.60L under a pressure of 1.70atm and at a temperature of 43.0 oC is warmed until both the pressure and volume of the gas are doubled. How many grams of helium are there
Helium gas with a volume of 2.60 L under a pressure of 1.30 atm and a temperature of 41.0 °C is warmed until both the pressure, Evaluate what the final temperature of the gas
A person is lying on a diving board 3.50 above the surface of the water in a swimming pool. What is the depth of the water at this point
prove P is proportional to its temperature T. prove that in an adiabatic process, this gas entropy S increases with increase volume V.
A copper rod 20 cm long having a cross-sectional area of 7.0 cm2 is used to connect a boiler maintained at 100 oC to a large block of ice at 0 oC. What is the rate of change in entropy of the boiler
Two parallel conductors carrying current in the same direction attract each other. If they are permitted to move toward each other, the forces of attraction do work. Where does the energy come from? Does this contradict the assertion in that magne..
A telescope consists of a mirror with radius of curvature 6.5 m and an eyepiece. If an astronomer would like the telescope to have a magnification of 114, what focal length eyepiece should he use?
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