Work-Energy Theorem: Which requires more work, increasing a car's speed from 0 mph to 30 mph or from 50 mph to 60 mph?
A. 0 mph to 30 mph
B. 50 mph to 60 mph
C. It is the same in both cases.
Answer: B
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The average distance from Venus to the Sun is about 2 AU
Indicate whether the statement is true or false
Of the wavelengths emitted from a hydrogen gas discharge tube, those that are associated with transitions from higher levels down to the n = 1 level produce which of the following?
a. infrared c. ultraviolet b. visible d. mixture of infrared and visible
A rock is thrown downward from an unknown height above the ground with an initial speed of 10 m/s. It strikes the ground 3.0 s later. Determine the initial height of the rock above the ground
a. 44 m b. 14 m c. 74 m d. 30 m e. 60 m
When astronomers study the light emitted from the Sun they notice that the light emitted from the east limb (edge) is blueshifted while the light emitted from the west limb is redshifted. The reason for this is that
A. the Sun is rotating. B. the Sun contains different chemicals that emit different colors. C. the two opposing limbs have different surface temperatures. D. the distance between Earth and the Sun is constantly changing.