____________________ are great lava flows covering 17% of the lunar surface
Fill in the blank(s) with correct word
Maria
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A 4 ft radius spherical container holds helium gas at 20 psia and 95ºF. Estimate the amount of helium lost through diffusion in 24 hours if the sphere is made of silicon dioxide, SiO2 (glass) and if it is assumed that at a point 1/8 inches into the container wall from the inside the concentration of helium is zero.
What will be an ideal response?
The iron we commonly find in our surroundings came from:
A) the iron core of a massive star which exploded as a type I supernova. B) planetary nebulae. C) jets ejected by a rapidly spinning pulsar. D) material ejected by a nova explosion. E) decay of nickel 56 and cobalt 56 in a supernova remnant.
In the figure, the coefficient of kinetic friction between the surface and the larger block is 0.20, and the coefficient of kinetic friction between the surface and the smaller block is 0.30. If F = 14 N and M = 1.0 kg, what is the magnitude of the acceleration of either block?
a.
2.0 m/s2
b.
1.3 m/s2
c.
1.5 m/s2
d.
1.8 m/s2
e.
3.5 m/s2
If the Moon were farther from Earth, compared to now, the tides would be
A. neap tides would be shallower, and spring tides would be taller than now. B. less tall all the time. C. about the same as now. D. higher all the time.