Oxygen in Earth's atmosphere is outgassed in volcanic eruptions
Indicate whether the statement is true or false
F
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What is the source for the lava that covers the maria?
A. the original molten surface of the Moon B. rock melted by radioactive heating C. molten rock from impacts D. volcanic eruptions due to subducting lunar crust
A car weighing 5000 N is traveling along a straight level road powered by a forward drive force of 500 N. The force of air resistance is 200 N, and rolling resistance is 100 N. The car's acceleration is
A) in the backward direction. B) in a direction that is sideways to the car. C) in the downward direction. D) zero. E) in the forward direction.
Three cars (car F, car G, and car H) are moving with the same speed and slam on their brakes. The most massive car is car F, and the least massive is car H
If the tires of all three cars have identical coefficients of kinetic friction with the road surface, which car travels the longest distance to skid to a stop? A) They all travel the same distance in stopping. B) Car F C) Car G D) Car H
A container is filled with a mixture of helium and oxygen gases. A thermometer in the container indicates that the temperature is 22°C. Which gas molecules have the greater average speed?
A) The helium molecules do because they are monatomic. B) It is the same for both because the temperatures are the same. C) The oxygen molecules do because they are diatomic. D) The oxygen molecules do because they are more massive. E) The helium molecules do because they are less massive.