You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down
A) Work is + on the way up and + on the way down.
B) Work is + on the way up and - on the way down.
C) Work is - on the way up and + on the way down.
D) Work is - on the way up and - on the way down.
C
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A child has a temperature of 104°F. What is the temperature in degrees kelvin?
A. 40 B. 406 C. 401 D. 313 E. 349
An object of weight W is in freefall close to the surface of Earth. The magnitude of the force that the object exerts on Earth is
A) greater than W. B) less than W. C) equal to W. D) zero. E) cannot be determined without knowing the relative masses of the object and the earth.
Which of the following statements is true of Kuiper Belt Objects?
A) They are associated with the Jovian planets. B) Most of them are composed of liquid helium. C) Some of them have moons of their own. D) They are found in regions surrounding Jupiter's orbit.
Consider three drinking glasses. All three have the same area base, and all three are filled to the same depth with water. Glass A is cylindrical. Glass B is wider at the top than at the bottom, and so holds more water than A
Glass C is narrower at the top than at the bottom, and so holds less water than A. Which glass has the greatest liquid pressure at the bottom? A) Glass A B) Glass B C) Glass C D) All three have equal non-zero pressure at the bottom. E) All three have zero pressure at the bottom.