A raindrop is doing its part to form a primary rainbow. Red and blue light enter near the top of the raindrop together from the sun. Both red and blue are reflected once at the back surface of the drop, but when the two rays emerge on the sunward side
A. the red ray lies above the blue ray and is more nearly horizontal than the blue ray.
B. the blue ray lies above the red ray and is more nearly horizontal than the red ray.
C. the blue ray lies below the yellow ray and is more nearly horizontal than the yellow ray.
D. None of these choices are correct
Answer: B
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A.
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.Adisa pulls a 50-N crate up a 5.0-m long inclined plane at a constant velocity. If the plane is inclined at an angle of 37° to the horizontal and there is a constant force of friction of 10 N between the crate and the surface, what is the net change in potential energy of the crate?
a. 120 J c. 250 J b. -120 J d. 150 J
A +8.00-?C charge is situated along the +y-axis at y = 0.400 m. What is the electric potential at the origin because of this charge?
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