Consider a solenoid of length L, N windings, and radius b (L is much longer than b). A current I is flowing through the wire. If the radius of the solenoid were doubled (becoming 2b), and all other quantities remained the same, the magnetic field
A) would remain the same.
B) would become twice as strong.
C) would become one half as strong.
A
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Constellations rise in the ________ and set in the ________.
A. east; west B. morning; evening C. west; east D. evening; morning E. Constellations neither rise nor set.
Interstellar clouds usually form groups of stars that leave the main sequence at the same time.
Answer the following statement true (T) or false (F)
A 500-kg elevator is pulled upward by a cable that exerts a constant force of 5500 N on the elevator for a distance of 50.0 m. The elevator is the system
(a) What is the work done by the 5500-N force? (b) What is the work done by the gravitational force? (c) What is the net work done on the elevator?
After an apple pie is taken from an oven, the pie filling is hotter than the crust due to
A) water in the filling that better retains thermal energy. B) uneven temperatures. C) high conductivity of apples.