The far side of the Moon was first mapped
A) by early Russian spacecraft.
B) by Galileo in 1610 with his first telescope.
C) by NASA with its Lunar Orbiters in the 1960s.
D) by the Apollo astronauts on the first orbit of the Moon with Apollo 8.
E) by William Herschel with his large reflectors in the early 1800s.
A
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What do astronomers typically refer to as "heavy elements"?
A) elements that are heavier than iron B) elements that are heavier than carbon C) elements that are heavier than uranium D) elements besides hydrogen and helium
Which statement is always correct when applied to a charge distribution located in a finite region of space?
a. Electric potential is always zero at infinity. b. Electric potential is always zero at the origin. c. Electric potential is always zero at a boundary surface to a charge distribution. d. Electric potential is always infinite at a boundary surface to a charge distribution. e. The location where electric potential is zero may be chosen arbitrarily.
A sensitive ammeter is connected to a wire loop and placed within the magnetic field of a strong horseshoe magnet. The ammeter shows a deflection when:
a. the wire is moved parallel to the field. b. neither wire nor magnet is moving. c. the wire's axis is parallel to the field. d. the wire is moved perpendicularly to the field.
Physics is NOT:
a. the study of the material world. b. the search for patterns in the behavior of material objects. c. the search for rules that describe the behavior of objects in the Universe. d. a discipline that covers the entire span of space and time. e. a fixed and unchanging body of knowledge.