On planet Q the standard unit of volume is called the guppy. Space travelers from Earth have determined that one liter = 38.2 guppies. How many guppies are in 200 liters?
a. 70.2 guppies
c. 5.24 guppies
b. 9.74 guppies
d. 7640 guppies
D
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Each of the four diagrams below shows a hypothetical electric field in a certain region of empty space where the magnetic field is constant in time. 
Which of the fields are physically impossible and why?
A. This field violates Faraday’s law. B. This field violates Gauss’s law. C. This field violates both of the above laws. D. This field is physically possible.
A common pulley acts similar to a
A) hydraulic press. B) gear. C) common lever. D) tension producer.
A beam of light that is parallel to the principal axis strikes a concave mirror. What happens to the reflected beam of light?
A) It also is parallel to the principal axis. B) It is perpendicular to the principal axis. C) It passes through the center of curvature of the mirror. D) It passes through the focal point of the mirror. E) It passes between the focal point and the center of curvature of the mirror.
The length of a certain wire is kept same while its radius is doubled. What is the new resistivity of this wire?
A) It is increased by a factor of 2. B) It is increased by a factor of 4. C) It is reduced by a factor of 2. D) It is reduced by a factor of 4. E) It does not change.