A hypothetical planet has a mass of one-half that of the earth and a radius of twice that of the earth. What is the free-fall acceleration on the planet in terms of g, the free-fall acceleration at the surface of the earth?

A) g
B) g/2
C) g/4
D) g/8
E) g/16


D

Physics & Space Science

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When Mercury or Venus passes in front of the disk of the Sun, we call this

A) an eclipse B) a shadow event C) a transit D) an occultation

Physics & Space Science

A conducting bar of length L rotates in a counterclockwise direction with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 0.20 T) is directed into the paper. If L = 0.40 m, what is the potential difference, VA ? VB?



a.
+24 mV

b.
?24 mV

c.
+16 mV

d.
?16 mV

e.
+32 mV

Physics & Space Science

As the radius of the orbit of an artificial satellite increases, its orbital period __________

Fill in the blank(s) with correct word

Physics & Space Science

Which photo shows what we call a first-quarter moon? (Note: Assume these photos were taken in the Northern Hemisphere.)

A) 1 B) 2 C) 3 D) 4

Physics & Space Science