At what location does an artificial Earth satellite in elliptical orbit have its lowest speed?
a. nearest the Earth
c. between Earth and Moon
b. farthest from the Earth
d. between Earth and Sun
B
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LR Circuits: A 1.5-H inductor is connected in series with a 200-? resistor through an ideal 15-V dc power supply and an open switch. After closing the, what is the maximum energy that will be contained in the inductor?
A. 1.2 mJ B. 2.2 mJ C. 3.2 mJ D. 4.2 mJ E. 5.2 mJ
Photosynthetic life existing on a planet farther from the Sun than the Earth would most likely be
A) smaller, less efficient at collecting solar radiation or have a faster metabolism than photosynthetic life on Earth B) identical to photosynthetic life on Earth C) larger, more efficient at collecting solar radiation or have a slower metabolism than photosynthetic life on Earth D) impossible
Plus and minus signs are used in one-dimensional motion to indicate direction. What is the sign of an acceleration that reduces the magnitude of a negative velocity? Of a positive velocity?
A. For negative velocity a positive acceleration will increase the magnitude of the velocity. For positive velocity a negative acceleration will reduce the magnitude of the velocity. B. For negative velocity a positive acceleration will reduce the magnitude of the velocity. For positive velocity a negative acceleration will reduce the magnitude of the velocity. C. For negative velocity a negative acceleration will reduce the magnitude of the velocity. For positive velocity a negative acceleration will reduce the magnitude of the velocity. 2. if an object is thrown straight up and air resistance is negligible, then (a) what will be its speed when it returns to the starting point on the ground? (b) If air resistance were not negligible, then how would the maximum height to which it rises be affected? a) The final return accelerati0on on the ground will be the same as the initial value. (b) The minimum height will be lower. b) The final return speed on the ground will not be the same as the initial speed. (b) The maximum height will be lower. c) The final return speed on the ground will be the same as the initial speed. (b) The maximum height will be lower.
Composite particles that are composed of three quarks are called
A) bosons. B) baryons. C) leptons. D) hadrons. E) mesons.