When something is thrown over large distances (on Earth), what new factor comes into play?
a. The curvature of the Earth.
b. The increase in gravity over long distances.
c. The decrease in gravity over long distances.
d. The tendency of thrown objects to fall to the ground.
e. The difference between miles and kilometers.
a
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Air is flowing through a rocket nozzle. Inside the rocket the air has a density of 5.25 kg/m3 and a speed of 1.20 m/s. The interior diameter of the rocket is 15.0 cm. At the nozzle exit, the diameter is 2.50 cm and the density is 1.29 kg/m3
What is the speed of the air when it leaves the nozzle? A) 176 m/s B) 29.3 m/s C) 88.0 m/s D) 35.2 m/s E) 343 m/s
Which of the following numbers has 4 significant figures; which has 5 significant figures? (a) 3001 (b) 0.00370 (c) 4774.00 (d) 29.290
What will be an ideal response?
Decreasing the volume of the container holding an ideal gas:
a. decreases the gas pressure by slowing the gas particles. b. does not affect the gas pressure. c. increases the gas pressure by slowing the gas particles. d. increases the gas pressure because gas particles bounce off the walls of the container more often. e. increases the gas pressure because gas particles strike the walls of the container with more momentum on average.
When the distance between a pair of charged particles is doubled, the force between them becomes how strong?