Suppose you try to bring two protons close together. Because of the electromagnetic force, the two protons will
A) attract one another.
B) remain stationary.
C) repel one another.
D) collide.
E) join together to form a deuterium nucleus.
C
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Which of the following was a new discovery about Pluto by the New Horizons mission?
A) evidence of recent geological activity B) the existence of moons orbiting Pluto C) the fact that Pluto has an ice-rich composition D) the fact that Pluto is less massive than Eris
The runoff channels on Mars were most likely formed by:
A) melting underground ice. B) catastrophic, but rare flooding. C) the annual melting of the polar ice caps. D) glaciers. E) rain that was part of a water cycle.
A positively charged particle is moving in the +y-direction when it enters a region with a uniform electric field pointing in the +x-direction. Which of the diagrams below shows its path while it is in the region where the electric field exists. The region with the field is the region between the plates bounding each figure. The field lines always point to the right. The
x-direction is to the right; the y-direction is up.
a.
b.
c.
An expanding shell of gas ejected from a medium-mass star during the latter stages of its evolution is known as a black hole
Indicate whether the statement is true or false