A white boat sunk in water where sunlight is dim appears
A) red.
B) yellow.
C) cyan.
D) no color–black.
Answer: C
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A 5.0-kg stone is thrown upward at 7.5 m/s at an angle of 51° above the horizontal from the upper edge of a cliff, and it hits the ground 1.5 s later with no air resistance. Find the magnitude of its velocity vector just as it reaches the ground
What will be an ideal response?
Assuming the frequency remains constant, a monochromatic light ray is transmitted through an glass-to-air boundary, what happens to the wavelength?
a. decreases b. approaches zero value c. increases d. remains unchanged
Compared to stars within the disk, halo stars
a. orbit at random inclinations to the galactic plane b. orbit at different speeds c. orbit with paths crossing d. All of the other choices are correct.
As the polar icecaps melt, the resulting water spreads over the entire Earth. This new mass distribution tends to make the length of a day
A) longer. B) shorter. C) none of these