The intensity of cosmic rays bombarding the Earth's surface is greatest at
A) the poles.
B) mid-latitudes.
C) the equator.
D) no particular locations.
Answer: A
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What are four key features of our solar system that any theory of solar system formation must be able to explain?
a. The Sun generates energy through fusion of hydrogen into helium.} b. There are clear patterns to the rotation and orbits of large bodies in the solar system. c. There are vast numbers of asteroids and comets. d. Planets fall into two major categories. e. There are a few notable “exceptions to the rules.” f. The solar nebula collapsed due to gravity.
If you increase the initial speed of a bullet by 10%, the resultant RANGE will increase by what percent (assume air resistance can be ignored)?
A) 5.0% B) 20% C) 10% D) 21% E) 11%
What is the slit spacing of a diffraction necessary for a 600 nm light to have a first order principal maximum at 25.0°?
A) 1.42 ?m B) 2.01 ?m C) 3.12 ?m D) 4.12 ?m E) 5.44 ?m
Two blocks, A and B, have the same size and shape. Block A floats in water, but block B sinks in water
Which block has the larger buoyant force on it?
1.Block A has the larger buoyant force on it. 2.Block B has the larger buoyant force on it. 3.Neither; they have the same buoyant force on them. 4.Impossible to determine from the given information.