The reason the north pole of a bar magnet free to rotate points north is because
a. the south geographic pole of the earth is the Earth's magnetic north pole.
b. the south geographic pole of the earth is the Earth's magnetic south pole.
c. there is a net accumulation of negative magnetic charge at the Earth's south geographic pole.
d. there is a net accumulation of positive magnetic charge at the Earth's north geographic pole.
e. the north geographic pole of the Earth is the earth's magnetic north pole.
a
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To demagnetize a ferromagnetic metal, heat it to above the _________temperature in the absence of a magnetic field.
Fill in the blank(s) with the appropriate word(s).
The Sketch mobile app is an example of illustration software.
Answer the following statement true (T) or false (F)
When the mass of a simple pendulum is tripled, the time required for one complete vibration
A) increases by a factor of 3. B) does not change. C) decreases to one-third of its original value. D) decreases to 3/4 of its original value. E) increases to 4/3 of its original value.
Which of the following locations has the smallest (in magnitude) magnetic declination?
a. Washington state b. the South Carolina – Georgia border c. the San Francisco – Oakland area d. western Colorado