Power: A 1500-kg car accelerates from rest to 25 m/s in 7.0 s. What is the average power delivered by the engine? (1 hp = 746 W)
A. 60 hp
B. 70 hp
C. 80 hp
D. 90 hp
Answer: D
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When we speak of the large-scale structure of the universe, we mean
A) the structure of any large galaxy. B) the structure of any individual cluster of galaxies. C) the overall shape of the observable universe. D) the overall arrangement of galaxies, chains of galaxies, and galactic sheets in the universe.
What type of celestial bodies are found within the Oort cloud?
a. terrestrial-like planets b. planetesimals c. icy gas giants d. dust and rock e. icy bodies
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C A 1 kg block of ice is removed from a freezer where its temperature was –10°C. The amount of heat absorbed by the ice as it warms to 0°C is
a. 2,000 J b. 4,000 J c. 20,000 J d. 40,000 J e. 334,000 J
The greenhouse effect occurs because
a. low frequency EM waves are reflected from the atmosphere b. high frequency EM waves are reflected from the atmosphere c. the ozone layer absorbs ultraviolet light d. carbon dioxide in the atmosphere absorbs infrared radiation e. none of the above