Magnetic Materials: When a ferromagnetic material is placed in an external magnetic field, the net magnetic field of its magnetic domains becomes
A. smaller.
B. zero.
C. larger.
Answer: C
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The visible lines from hydrogen are all members of the
a. Lyman series. b. Balmer series. c. Paschen series. d. Brackett series.
Somewhere between the Earth and the Moon is a point where the gravitational attraction of the Earth is canceled by the gravitational pull of the Moon. The mass of the Moon is 1/81 that of the Earth. How far from the center of the Earth is this point?
a. 8/9 the way to the Moon b. 9/10 the way to the Moon c. 3/4 the way to the Moon d. 80/81 the way to the Moon
On a weather map we see an H for Highs and an L for Lows. In a high pressure region we generally can find
A) stormy weather. B) clear skies. C) very cold temperatures. D) cloud cover.
The object shown below has mass m and velocity 
. The direction of its angular momentum vector with respect to an axis perpendicular to the page through point O is
A. downwards. B. to the right. C. into the page. D. up out of the page. E. counterclockwise.