The figure shows the distance versus time graph of an object
The acceleration of the moving object is a non-zero constant.
a.
True
b.
False
a
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Centrifugal forces are an apparent reality to observers in a reference frame that is
A) moving at constant velocity. B) an inertial reference frame. C) at rest. D) rotating. E) none of the above
What is the energy density in the magnetic field 25 cm from a long straight wire carrying a current of 12 A?
A) 7.3 × 10-5 J/ m3 B) 3.7 × 10-5 J/ m3 C) 3.6 × 10-4 J/ m3 D) 1.2 × 10-4 J/ m3 E) cannot be determined with the information given
Imagine that this classroom contains a constant magnetic field that points from the front to the back. In front of you a negative charge is slowly moving horizontally to your left. As you watch, the magnetic force on the charge
A. deflects the charge away from you. B. deflects the charge into a clockwise directed vertical circle. C. has no effect on the charge. D. deflects the charge into a counterclockwise vertical circle. E. deflects the charge toward you.
Which of the following properties is used to distinguish between the core, mantle, and crust of a planet?
A) geological activity B) temperature C) rock strength D) density E) color