Consider a compass with a square magnet placed in a uniform electric field, as shown below. Supposing that we place the square-magnet compass in a rightward magnetic field instead of a rightward electric field .

A. Clockwise, to align itself with the field.
B. Counter clockwise, to align itself with the field.
C. 180° either clockwise or counter clockwise.
D. It won’t turn, as it is already aligned with the field.
E. It won’t turn, because the field wants to twist it around a different axis altogether.
F. It won’t turn because it is not affected by this field.


B. Counter clockwise, to align itself with the field.

Physics & Space Science

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A child has a temperature of 101°F. If her total cross-sectional area is 2 m2, find the energy lost each second (in W) due to radiation, assuming the emissivity is 1 . (Assume the room temperature is 70°F.)

a. 217 b. 180 c. 90 d. 68 e. 850

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