Going from Earth's surface up toward space, the atmospheric layers are the troposphere,
A) troposphere, stratosphere, ozonosphere, mesosphere, thermosphere, ionosphere, and exosphere.
B) exosphere, thermosphere, mesosphere, stratosphere, and troposphere.
C) exosphere, ionosphere, thermosphere, mesosphere, ozonosphere, stratosphere, and troposphere.
D) troposphere, stratosphere, mesosphere, thermosphere, and the exosphere.
Answer: B
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In 1928, the International Astronomical Union (IAU) established _______________ official constellations with carefully defined boundaries that together include every part of the sky
Fill in the blank(s) with correct word
The photo shows a galaxy known as Arp 220, and the inset shows this galaxy's spectrum. What can you infer?
A) Most of the light from this galaxy is infrared, indicating active star formation. B) Most of the light from this galaxy is visible light, and it comes from an active galactic nucleus. C) The broad peak is a spectral line indicating the presence of massive amounts of hydrogen gas. D) The spectrum peaks in the infrared, indicating that this galaxy has a huge redshift and must be far away.
A 50.0-kg box is being pushed along a horizontal surface by a force of 250 N directed 28.0° below the horizontal. The coefficient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box?
A) 0.769 m/s2 B) 1.77 m/s2 C) 3.16 m/s2 D) 6.31 m/s2 E) 8.53 m/s2
Microscopic slush in water tends to make the water
A) more dense. B) less dense. C) slipperier. D) warmer.