A pole vaulter clears 3.98 m. With what speed does he strike the mat in the landing area?
a. 78.0 m/s
b. 6.25 m/s
c. 8.83 m/s
d. 4.42 m/s
e. 0.226 m/s
c
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As a white dwarf ages, its position on a standard H-R diagram will move ____
a. upward and to the right b. upward and to the left c. downward and to the right d. straight downward e. downward and to the left
Saturn's cloud surface appears more uniform than Jupiter's because
A) there is a thick outer cloud covering of water ice overlying the colorful ices. B) due to Saturn's lower gravity, the colorful cloud layers escaped. C) it is composed of completely different gases than Jupiter's. D) the cloud layers are thicker, allowing fewer holes to see the colorful layers. E) due to Saturn's greater distance from the Sun, the colorful cloud layers are just not visible.
Fiberscopes are based on the physical phenomena called
A) diffusion. B) dispersion. C) total internal reflection. D) absorption. E) polarization.
The Balmer series is formed by electron transitions in hydrogen that
A) are between the n = 1 and n = 3 shells. B) end on the n = 2 shell. C) end on the n = 1 shell. D) begin on the n = 1 shell. E) begin on the n = 2 shell.