Answer the following statement(s) true (T) or false (F)
1. If I know a field’s curl at all points in space, I can calculate the field’s vectors at all points in space.
2. In a certain region of empty space, the z component of the magnetic field is changing with time. If we sum for a set of tiny steps
around a closed loop in the xy plane, we will get a nonzero result.
3. In a certain region of empty space, the z component of the magnetic field is changing with time. If we sum for a set of tiny steps
around a closed loop in the xy plane, we will get a nonzero result.
1. FALSE
2. TRUE
3. TRUE
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The center of mass and the center of gravity coincide
A) only if the object is symmetrical. B) only if the object is symmetrical and it is in a uniform gravitational field. C) if the object is in a uniform gravitational field. D) at all times.
Most asteroids orbit the Sun in the asteroid belt, which is located
a. between the orbits of Mars and Jupiter b. between the orbits of Neptune and Pluto c. beyond the orbit of Neptune d. none of the above
The inertia of a body is directly related to its
a) force. b) mass. c) velocity. d) volume.
How is the sunspot cycle directly relevant to us here on Earth?
A) Coronal mass ejections and other activity associated with the sunspot cycle can disrupt radio communications and knock out sensitive electronic equipment. B) The sunspot cycle strongly influences Earth's weather. C) The Sun's magnetic field, which plays a major role in the sunspot cycle, affects compass needles that we use on Earth. D) The brightening and darkening of the Sun that occurs during the sunspot cycle affects plant photosynthesis here on Earth. E) The sunspot cycle is the cause of recent global warming.