A total lunar eclipse is
a. visible only from the path of totality.
b. visible only during a new moon.
c. visible to all observers on the side of Earth from which the moon would be visible at that time.
d. an opportunity to study the corona of the sun.
e. none of the above
C
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Force on a Moving Charge: An electron is moving to the right, as shown in the figure. Suddenly it encounters uniform magnetic field pointing out of the page. Which one of the three paths shown will it follow in the field?
A. path a B. path b C. path c
List the following events in the order in which they occurred, from first to last.
a) earliest humans b) earliest animals c) impact causes extinction of dinosaurs d) earliest mammals e) earliest plants living on land f) first time there is significant oxygen in Earth's atmosphere g) first life on Earth
Which of the following expresses a principle, which was initially stated by Galileo and was later incorporated into Newton's laws of motion?
a. An object's acceleration is inversely proportional to its mass. b. For every action there is an equal but opposite reaction. c. The natural condition for a moving object is to remain in motion. d. The natural condition for a moving object is to come to rest.
Imagine a magnetic field pointing into the plane of this page. An electron moves across the paper from left to right. The direction of the magnetic force on the electron will be
A. out of the plane of the paper. B. in the plane of the paper and toward the bottom of the page. C. into the plane of the paper. D. in the plane of the paper and toward the top of the page. E. in the plane of the paper and opposite the electron's velocity.