Which of the following is not a characteristic of the inner planets?
A) They all have solid, rocky surfaces.
B) Their orbits are relatively closely spaced.
C) They have very few, if any, satellites.
D) They all have substantial atmospheres.
E) They are relatively smaller than the outer planets.
D
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Photon energies and wavelengths are _________related to each other.
Fill in the blank(s) with the appropriate word(s).
What do the three black arrows represent?
A) the tidal force Earth exerts on the Moon B) the Moon's gravitational force at different points on Earth C) the direction in which Earth's water is flowing D) Earth's orbital motion
Stepping barefoot off a rug onto a hardwood floor makes your feet feel cold. Why?
a. The hardwood floor is at a lower temperature than the rug. b. The hardwood floor is at a lower temperature than your feet. c. The hardwood floor conducts heat away from your feet better than the rug. d. all of the above
After a proton with an initial speed of 1.50 × 105 m/s has increased its speed by accelerating through a potential difference of 0.100 kV, what is its final speed? (e = 1.60 × 10-19 C , mproton = 1.67 × 10-27 kg)
A) 3.55 × 105 m/s B) 8.80 × 105 m/s C) 2.04 × 105 m/s D) 4.56 × 105 m/s E) 1.55 × 106 m/s