If a weighted air-filled balloon sinks in deep water, it will
A) likely sink to an equilibrium level before reaching bottom.
B) likely burst if water pressure is great enough.
C) be acted on by a continuously decreasing buoyant force.
D) none of the above
Answer: C
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What will be an ideal response?
All of the following are true. Which of these gives evidence that quasars were more common in the early stages of the universe?
A) They are more common at very great distances. B) They are very bright. C) They are active galactic nuclei. D) We don't see them in every galaxy.
The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.97 × 1024 kg, the radius of the earth is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2
Assuming a circular orbit, (a) what is the period of the International Space Station's orbit? (b) what is the speed of the International Space Station in its orbit?
A block is pulled across a floor as shown in the vector diagram. The force vector F has the greater component in the
1) horizontal direction, 2) vertical direction, and this component is 3) larger than the vector F. 4) smaller than the vector F. 5) equal to the vector F.