Rain or snow that falls on the continents is Earth's only
A) supply of water.
B) supply of fresh water.
C) hydrologic cycle.
D) source of evaporation and condensation.
Answer: B
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Potential Energy: A very small 4.8-g particle carrying a charge of +9.9 ?C is fired with an initial speed of 8.0 m/s directly toward a second small 7.8-g particle carrying a charge of + 5.2 ?C. The second particle is held fixed throughout this process. If these particles are initially very far apart, what is the closest they get to each other? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
The moon revolves around the earth once every __________ days
Fill in the blank(s) with the appropriate word(s).
A refracting telescope has an eyepiece of focal length -80 mm and an objective of focal length 36 cm. What is the magnification of this instrument?
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The gravitational acceleration on a planet's surface is 16.0 m/s2. What is the gravitational acceleration at an altitude of one planet diameter above the SURFACE of the planet?
A) 5.33 m/s2 B) 1.60 m/s2 C) 1.78 m/s2 D) 4.00 m/s2 E) 8.00 m/s2