If you were to travel parallel to an infinitely long straight wire with current I at the same velocity as the electrons in the wire at a distance a from the wire, the magnitude of the magnetic field (according to your measuring instruments) would be
A.
B.
.C.
.D.
.E.
.Answer: A
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The boundary between two air masses is called a
a. division. b. border. c. front. d. storm.
A beam of light is moving in the same direction as an object is traveling. If the object is moving at speed 0.70 c, how fast is the light moving as it passes the object?
A) c B) 1.35 c C) 1.40 c D) 0.3 c E) 1.70 c
A person sits on a freely spinning lab stool (no friction). When this person extends her arms,
A) her moment of inertia decreases and her angular velocity increases. B) her moment of inertia decreases and her angular velocity decreases. C) her moment of inertia increases and her angular velocity increases. D) her moment of inertia increases and her angular velocity decreases. E) her moment of inertia increases and her angular velocity remains the same.
Smog is a mixture of smoke and
a. fog. b. CO2. c. O2. d. CO.