Questions from Modern Physics

Q: A Gasoline Engine. A gasoline engine takes in 1.61

A Gasoline Engine. A gasoline engine takes in 1.61 × 104 J of heat and delivers 3700 J of work per cycle. The heat is obtained by burning gasoline with a heat of combustion of 4.60 × 104 J/g. (a). Wh...

Q: A gasoline engine has a power output of 180 kW (about

A gasoline engine has a power output of 180 kW (about 241 hp). Its thermal efficiency is 28.0%. (a). How much heat must be supplied to the engine per second? (b). How much heat is discarded by the e...

Q: The pV-diagram in Fig. E20.5 shows a

The pV-diagram in Fig. E20.5 shows a cycle of a heat engine that uses 0.250 mol of an ideal gas with γ = 1.40. Process ab is adiabatic. Fig. E20.5: (a). Find the pressure of the gas at...

Q: An experimental power plant at the Natural Energy Laboratory of Hawaii generates

An experimental power plant at the Natural Energy Laboratory of Hawaii generates electricity from the temperature gradient of the ocean. The surface and deep-water temperatures are 270C and 60C, respe...

Q: You decide to use your body as a Carnot heat engine.

You decide to use your body as a Carnot heat engine. The operating gas is in a tube with one end in your mouth (where the temperature is 37.0°C) and the other end at the surface of your skin, at 30.0°...

Q: A cylinder contains oxygen at a pressure of 2.00 atm

A cylinder contains oxygen at a pressure of 2.00 atm. The volume is 4.00 L, and the temperature is 300 K. Assume that the oxygen may be treated as an ideal gas. The oxygen is carried through the follo...

Q: A monatomic ideal gas is taken around the cycle shown in Fig

A monatomic ideal gas is taken around the cycle shown in Fig. P20.46 in the direction shown in the figure. The path for process c→ a is a straight line in the pV-diagram. (a). Calculate Q, W, and 

Q: Negative charge -Q is distributed uniformly over the surface of a

Negative charge -Q is distributed uniformly over the surface of a thin spherical insulating shell with radius R. Calculate the force (magnitude and direction) that the shell exerts on a positive point...

Q: A typical coal-fired power plant generates 1000 MW of usable

A typical coal-fired power plant generates 1000 MW of usable power at an overall thermal efficiency of 40%. (a). What is the rate of heat input to the plant? (b). The plant burns anthracite coal, wh...

Q: A Volkswagen Passat has a six-cylinder Otto-cycle engine

A Volkswagen Passat has a six-cylinder Otto-cycle engine with compression ratio r = 10.6. The diameter of each cylinder, called the bore of the engine, is 82.5 mm. The distance that the piston moves d...