A satellite is in a circular orbit about the Earth at an altitude at which air resistance is negligible. Which of the following statements is true?
a. There is only one force acting on the satellite. b. There are two forces acting on the satellite, and their resultant is zero.
c. There are two forces acting on the satellite, and their resultant is not zero.
d. There are three forces acting on the satellite. e. None of the preceding statements are correct.
A
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The radius of Earth is
A. larger at the equator. B. the same everywhere. C. not known. D. larger at the poles.
According to recent theorizing in high energy physics,
A) it is impossible to create or destroy quarks. B) protons and neutrons can be put together to form quarks. C) we should be able to find isolated quarks. D) All of the above. E) None of the above.
Which of the following accurately describes osmosis?
A) The more concentrated solution absorbs water from the less concentrated solution. B) The less concentrated solution absorbs water from the more concentrated solution. C) The less concentrated solution gets more dilute. D) The ions migrate from the more concentrated solution to the less concentrated. E) none of the above
What is wrong with the following depiction of a chemical reaction?
A) These boxes contain only molecules but no atoms. B) One box contains more molecules than the other. C) One box contains more atoms than the other. D) All of the above.