The conventional direction of magnetic field lines outside a magnet are from
A) north to south.
B) south to north.
C) either way
Answer: A
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A 150-N box is being pulled horizontally in a wagon accelerating uniformly at 3.00 m/s2
The box does not move relative to the wagon, the coefficient of static friction between the box and the wagon's surface is 0.600, and the coefficient of kinetic friction is 0.400. The friction force on this box is closest to A) 450 N. B) 90.0 N. C) 60.0 N. D) 45.9 N.
When a liquid boils and changes to a gas, it is said to have undergone a change of ________
Fill in the blank(s) with correct word
A particle with a charge of 4.0 ?C has a mass of 5.0 × 10-3 kg. What electric field directed upward will exactly balance the weight of the particle?
A) 4.1 × 102 N/C B) 8.2 × 102 N/C C) 4.4 × 104 N/C D) 1.2 × 104 N/C E) 5.1 × 106 N/C
A tube open at one end and closed at the other end produces sound having a fundamental frequency of 350 Hz. If you now open the closed end, the fundamental frequency becomes
A) 87.5 Hz. B) 175 Hz. C) 350 Hz. D) 700 Hz. E) 1400 Hz.