The distance between two successive ‘like' points on a wave is the wave's wavelength
Indicate whether the statement is true or false
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Latent Heats: How much heat must be added to a 8.0-kg block of ice at -8°C to change it to water at 14°C? The specific heat of ice is 2050 J/kg ? C°, the specific heat of water is 4186 J/kg ? C°, the latent heat of fusion of ice is 334,000 J/kg, and 1 cal = 4.186 J.
A. 780 kcal B. 140 kcal C. 180 kcal D. 810 kcal E. 730 kcal
All of the following statements about the Sun's corona are true. Which one explains why it is a source of X-rays?
A) The temperature of the corona's gas is some 1 to 2 million Kelvin. B) The corona lies above the visible surface of the Sun. C) The corona's gas consists mostly of hydrogen and helium. D) The corona's structure is largely shaped by magnetic fields.
A 1.0 ?F capacitor has a potential difference of 6.0 V applied across its plates. If the potential difference across its plates is increased to 8.0 V, how much ADDITIONAL energy does the capacitor store?
A) 14 ?J B) 28 ?J C) 2.0 ?J D) 4.0 ?J
A thermodynamic engine having the maximum possible efficiency has an efficiency of 25% when operating between two heat reservoirs. If the temperature of the cold reservoir is 300 K, what is the temperature of the hot reservoir?
A) 350 K B) 375 K C) 400 K D) 450 K E) 500 K