The pressure exerted by a gas is the result of __________
Fill in the blank(s) with correct word
molecular collisions
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Assuming the conditions ripe for life and intelligence abound in the Galaxy, what factor limits the number of galactic civilizations currently in existence?
A) the average survival time of the civilizations B) the lack of metals for technology C) the speed of technological development D) the expansion of the universe E) the number of supernova explosions
The pattern of rising hot gas cells all over the photosphere is called
A) filaments. B) granulation. C) sunspots. D) convective projections. E) prominences.
If a virtual image is formed along the principal axis 12 cm from a concave mirror with the focal length 23 cm, what is the object distance from the mirror?
a. 11.0 cm b. 25 cm c. 13 cm d. 7.9 cm e. 4.0 cm
A 51 g steel ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for 0.5 ms. The ball rebounds elastically, and returns to its original height
The time interval for a round trip is 3.00 s. In this situation, the average force exerted on the ball during contact with the plate is closest to: A) 3,000 N B) 1,500 N C) 2,490 N D) 2,000 N E) 3,500 N