In a nuclear power plant, the reactor produces 500°C steam that is used to power the steam turbines which generate 1 500 MW of electrical power. The cooling tower eliminates the waste heat at 50°C. If the efficiency of the plant were that of a Carnot engine, at what rate would waste heat be vented to the atmosphere?
1 080 MW
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Assuming equal rates of uniform acceleration in both cases, how much further would you travel if braking from 56mi/h to rest than from28 mi/h?
A) 5.2 times farther B) 4 times farther C) 3.2 times farther D) 4.8 times farther
A 44.0-g block of ice at -15.0°C is dropped into a calorimeter (of negligible heat capacity) containing 100g of water at 5.0°C
When equilibrium is reached, how much of the ice will have melted? The specific heat of ice is 2090 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 5.2 g B) 4.4 g C) 21 g D) 2.1 g E) 52 g
The mass of 1H is 1.007825 u and the mass of 1n is 1.008665 u. The mass of 12C is 12.000000 u, of 13N is 13.005739 u, and of 14N is 14.003074 u. What is the binding energy of the last neutron in 14N?
A) 10.6 MeV B) 9.8 MeV C) 1.9 MeV D) 2.5 MeV E) 3.8 MeV
The elliptical orbit of Mercury measurably precesses because
A) Mercury moves in the gravitational field of the other planets. B) Mercury travels faster than any other planet. C) Mercury is closest to the Sun. D) the Sun's gravitational field varies along Mercury's orbit. E) none of these