In beta minus decay, the number of protons in the nucleus
A)
is decreased by 1.
B)
is decreased by 2.
C)
is increased by 1.
D)
is increased by 2.
E)
remains unchanged.
C
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What fundamental fact underlies the operation of essentially all electric motors?
A) Iron is the only element that is magnetic. B) A current-carrying conductor placed perpendicular to a magnetic field will experience a force. C) Opposite electric charges attract and like charges repel. D) A magnetic North pole carries a positive electric charge, and a magnetic South pole carries a negative electric charge. E) Alternating current and direct current are both capable of doing work.
Heat is thermal energy that flows from
A) hot to cold. B) high energy to low energy. C) high thermal pressure to low thermal pressure. D) all of the above
If two heaters are connected in parallel across the 120 volt source, the current drawn from the source is 10 amperes
Indicate whether the statement is true or false
A constant force acts on a moving object. The object makes a fixed magnitude of displacement in some direction
In general, in what direction is the displacement that will result in the object traveling with the least kinetic energy after the displacement occurs? A) The same direction as the force B) The direction does not matter. C) In a direction perpendicular to the plane of the force and the velocity of the object D) The opposite direction as the force E) Any direction perpendicular to the force