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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A. downwards. B. to the right. C. into the page. D. up out of the page. E. counterclockwise.
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.