Answer the following statement(s) true (T) or false (F)
1. In the empty region between the plates of a charging capacitor, we must observe some kind of nonuniform magnetic field.
2. In a certain region of empty space, 
= 0 and is constant in time. Assume that the magnetic field in that region is unidirectional (everywhere points in the same direction). Such a field must also be uniform
1. TRUE
2. TRUE
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An atom that has gained one or more electrons is called an isotope
a. True b. False Indicate whether the statement is true or false
A block of mass M slides down a frictionless plane inclined at an angle ? with the horizontal. The normal reaction force exerted by the plane on the block is
A) Mg. B) Mg sin ?. C) Mg cos ?. D) Mg tan ?. E) zero, since the plane is frictionless.
An object of mass m moving at speed v0 strikes an object of mass 2m which had been at rest. The first object bounces backward along its initial path at speed v0 . Is this collision elastic, and if not, what is the change in kinetic energy of the system?
a. The collision is elastic. b. The kinetic energy decreases by mv2. c. The kinetic energy decreases by mv2/2. d. The kinetic energy increases by mv2.
A mover slides a refrigerator 5 meters across a floor. If a force of 200 N was used, how much work was done?