Humans are scientifically classified as Homo sapiens. In this system, the word sapiens refers to the
A) genus
B) species
C) order
D) family
B
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Which spectrum is shown above?
a. emission
b. absorption
c. blackbody
d. None of the other choices are correct.
The satellite Amalthea orbits Jupiter at just about the same distance in kilometers at which Mimas orbits Saturn. Yet Mimas takes almost twice as long to orbit
What can you deduce from this difference qualitatively? Since Jupiter and Saturn are not very different in radius, what else can you conclude?
Why does the rotation of a protostar slow down over time?
A) All rotating objects slow down over time. B) Magnetic fields can transfer angular momentum to the protostellar disk and protostellar winds can carry angular momentum away. C) The onset of fusion causes the rotation rate to slow dramatically. D) Magnetic fields of other stars interact with the magnetic fields of the protostars, slowing its rotation.
A ray of light in air enters a glass surface at right angles to the surface. What is the angle of refraction?
A) 90° B) 180° C) 270° D) 360° E) 0°