What is the stratosphere?
A. the uppermost layer of the atmosphere
B. the layer of the atmosphere containing the ozone layer
C. the layer of the atmosphere where the weather we experience is located
D. the layer of the atmosphere containing the aurora
E. None of these choices are correct.
Answer: B
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Energy Conservation With Nonconservative Forces: A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction is -6.0 kJ, what is the speed of the skier on reaching the bottom of the slope?
A. 17 m/s B. 24 m/s C. 28 m/s D. 31 m/s
How does the traditional theory of the formation of the galaxy explain the origin of globular clusters?
a. They formed in the disk and later were ejected to the halo. b. They formed in other galaxies and were captured by close interactions. c. They build over time from the collision of stars in the halo. d. They formed early on during the free-fall collapse of the proto-galactic material.
In relativity, two people share the same reference frame only if they
A) are not moving relative to one another. B) are both located in the same place. C) are both located in the same place and are stationary. D) agree on the laws of nature.
FM radio reception may be blocked by buildings because the wavelengths are too short to be ______________ around buildings
Fill in the blank(s) with correct word