Violent impacts of infalling particles release energy called ____________
Fill in the blank(s) with correct word
heat of formation
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A manufacturer in the U.S. wants to sell a refrigeration system to a customer in Germany. The standard measure of refrigeration capacity used in the United States is the ‘ton’; a one-ton capacity means that the unit is capable of making about one ton of ice per day or has a heat removal rate of 12,000 Btu/hr. The capacity of the American system is to be guaranteed at 3 tons. What would this guarantee be in SI units?
GIVEN - A three-ton refrigeration unit to be sold in Germany FIND (a) The rating in SI units
The shell ejection in making a planetary is spherical and symmetrical in all cases
Indicate whether the statement is true or false
The 1986 Susan Solomon expedition
A) discovered that the sun's infrared is significantly absorbed by carbon dioxide. B) confirmed that fossil fuels are causing global warming. C) discovered that solar radiation is most energetic at the frequency of yellow-green light. D) confirmed that rain-forest destruction is a significant contributor to ozone depletion. E) confirmed that CFCs are causing ozone depletion over Antarctica.
Which of the following are the best candidates to search for planets that might harbor extraterrestrial life?
A) low mass stars (less than one-tenth of the mass of the Sun), because these are the most common stars in our galaxy B) solar-mass stars, because they have both a large habitable zone and a long stellar lifetime. C) massive stars (greater than twice the mass of the Sun) because they provide more energy to promote biology D) halo stars, because planets can form in isolation from disruptive stellar encounters E) binary stars, because they provide twice as much energy to promote biology