If the distance from the Sun to the Earth is represented by roughly 15 meters, then the distance from Earth to the Moon on the same scale would be
a. about 30 meters.
b. about 10 meters.
c. about 1 meter.
d. small than your hand.
d
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A charge of 25 nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along which the arc lies?
a. 81 N/C b. 61 N/C c. 71 N/C d. 51 N/C e. 25 N/C
The direction of the force on an electric charge in a magnetic field is
a. in the direction of the magnetic field b. in the direction of motion of the charge c. perpendicular to the magnetic field d. perpendicular to the direction of motion of the charge e. none of the above
An object has been located orbiting the Sun at a distance from the Sun of 65 AU. What is the approximate orbital period of this object?
a. 65 years b. 275,000 years c. 4225 years d. 8.1 years e. 524 years
Consider the following processes: The temperature of two identical gases are increased from the same initial temperature to the same final temperature. Reversible processes are used. For gas A the process is carried out at constant volume while for gas B it is carried out at constant pressure. The change in entropy:
A. is the same for A and B B. is greater for A C. is greater for B D. is greater for A only if the initial temperature is low E. is greater for A only if the initial temperature is high