The total number of comets orbiting the Sun is estimated to be about
A) 1 trillion.
B) 1,000.
C) 100,000.
D) 1 million.
A
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A rising balloon is buoyed up with a force equal to the
A) weight of air it displaces. B) density of surrounding air. C) atmospheric pressure. D) weight of the balloon and its contents. E) all of the above
Lobate scarps are believed to have formed on Mercury when its interior cooled and shrank
a. True b. False Indicate whether the statement is true or false
At room temperature, a typical person loses energy to the surroundings at the rate of 62.0 W
If this energy loss has to be made up by an equivalent food intake, how many Calories does this person need to consume every day just to make up this heat loss? A) 1040 Calories B) 1160 Calories C) 1280 Calories D) 1340 Calories E) 1400 Calories
In which of the following processes does the system's rest mass change?
A) An automobile speeds up. B) A rubber ball is squeezed. C) The rest mass changes in both of the above processes. D) The rest mass changes in neither of the above processes.