The presence of vesicular basalts among the lunar rock samples shows that
a. the lunar surface was fragmented by meteorite impacts.
b. volcanism did not occur on the Moon.
c. the crust must have been made of anorthosite.
d. molten lava once flowed over the lunar surface.
e. the Moon was once hit by a very large meteorite.
d
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A container is filled with water and the pressure at the container bottom is P. If the container is instead filled with oil having specific gravity 0.80, what new bottom pressure results?
a. a pressure < P b. the same pressure P c. a pressure > P d. This is unable to be determined with the information given.
If an x-ray beam of wavelength 1.4 × 10-10 m makes an angle of 20° with a set of planes in a crystal causing first order constructive interference, at what angle will the second order line appear?
A) 40° B) 20° C) 43° D) 4.0° E) 11°
An electron moves with a speed of 8.0 × 106 m/s along the +x-axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x-axis and lying in the xy-plane
Calculate the magnitude of the magnetic force on the electron. (e = 1.60 × 10-19 C) A) 2.8 × 10-10 N B) 3.2 × 10-10 N C) 2.8 × 10-12 N D) 3.2 × 10-12 N E) 0 N
In lasers, YAG stands for
A. yellow argon gold. B. yearly age group. C. yttrium assisted gain. D. yttrium aluminum garnet. E. yttrium antimony gain.