A typical meteor is created by a particle about the size of a ________
A) baseball B) basketball C) pea D) car
C
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Specific Heat: The water flowing over Niagara Falls drops a distance of 50 m. If all the gravitational potential energy is converted to thermal energy, by what temperature does the water rise? The specific heat of water is 4186 J/kg ? K.
A. 0.10 C° B. 0.12 C° C. 0.37 C° D. 0.42 C°
An ideal Carnot engine operates between reservoirs having temperatures of 125°C and -20°C. Each cycle the heat expelled by this engine is used to melt 30.0 g of ice at 0.00°C
The heat of fusion of water is 3.34 × 105 J/kg and the heat of vaporization of water is 2.25 × 106 J/kg. (a) How much work does this engine do each cycle? (b) How much heat per cycle does this engine absorb at the hot reservoir? What will be an ideal response?
A 10-? resistor is connected in series with a 20-?F capacitor. What is the impedance at 1.0 kHz?
A) 8.0 ? B) 10 ? C) 15 ? D) 13 ?
Describe the physical significance of thermal conductivity.
What will be an ideal response?