According to the Maxwellian speed distribution, as the temperature increases the most probable speed:
A. increases
B. decreases
C. increases at high temperatures and decreases at low
D. decreases at high temperatures and increases at low
E. stays the same
Answer: A. increases
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Plants convert radiant energy from the Sun into chemical energy by a process called photosynthesis.
a. true b. false
One possible way that future scientists may determine whether the core-accretion model or the gravitational instability theory better explains the formation of the jovian planet is:
A) measuring the mass of the rocky material in the jovian planets' cores. B) measuring the metallic hydrogen layer in the jovian planets. C) observing the changes in the rings around the jovian planets. D) observing the changes in the magnetic fields of the jovian planets.
Two charged particles held a certain distance apart are released. As they move, the acceleration of each decreases. Therefore, their charges have
A) the same sign. B) opposite signs. C) need more information
The Sun is spherical due to
A) Earth circling it. B) Earth and Moon circling it. C) gravitation. D) none of the above