Why does atmospheric pressure decrease as you go higher in altitude on Earth?
A) Gravity gets much weaker with altitude.
B) The weight of the atmosphere above you decreases with altitude.
C) Temperature decreases with altitude and lower temperature tends to mean lower pressure.
D) There are fewer greenhouse gases at higher altitude.
B
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The Solar System is located about ________ from the center of the Milky Way.
A. 8 light-years B. 8 kiloparsecs C. 8 parsecs D. 8 AU
The overall dimming of starlight passing through dust clouds is called ________
Fill in the blank(s) with correct word
A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. What is the speed of the wreckage just after the collision?
A) 6.10 m/s B) 12.2 m/s C) 25.0 m/s D) 35.0 m/s E) 17.3 m/s
Your motorboat can move at 30 km/h in still water. What is the minimum time it will take you to move 12 km downstream in a river flowing at 6.0 km/h?
A) 20 min B) 22 min C) 24 min D) 30 min