In casually observing a cup of tea you are
A) affecting its temperature.
B) affecting its location.
C) both of these
D) neither of these
Answer: D
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The source of Earth's internal energy involves
A) kinetic energy. B) potential energy. C) radioactivity. D) the Sun.
A cyclotron is designed to accelerate protons to a maximum kinetic energy K. Assuming one then tried to accelerate alpha particles (about four times the mass and twice the charge), what kinetic energy can be achieved?
A. K B. 2K C. 1/2K D. 1/4K E. 4K F. 8K
Acceleration due to gravity is 9.8 m/s2 on the surface of Earth, and at orbits 200 miles above the surface of Earth, where the space shuttle orbits, the acceleration is
A. less than 9.8 m/s2. B. greater than 9.8 m/s2. C. exactly 9.8 m/s2-same as on the surface of Earth. D. undetermined, because it depends on the mass of the spacecraft or satellite.
Examine the following figure, which demonstrates star trails that would be visible in a photo centered on the North Star (Polaris) when the camera's shutter is left open to reveal the path the stars are taking as they move during part of one night. Which of the following best describes your observations?
A. Some stars move in a counterclockwise path around Polaris, while others move in a clockwise path. B. The stars closest to Polaris move in smaller circles. C. All of the stars move in a counterclockwise path around Polaris. D. All of the stars move from east to west. E. Each star moves in a circular path of the same radius. F. All of the stars move in a clockwise path around Polaris.