When red, green, and blue lights shine on a golf ball, the shadows cast are
A) red, green, and blue.
B) black.
C) magenta, cyan, and yellow.
D) none of the above
Answer: C
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Betelgeuse is the brightest star of which constellation?
a. Orion b. Ursa Minor c. Ursa Major d. Southern Cross e. Cassiopeia
Neglecting the effect of air friction, at what angle should a cannon be raised to achieve the greatest HEIGHT?
What will be an ideal response?
In a model airplane, the propeller is a significant part of the total mass. A model airplane is flying on a level path, with its propeller rotating clockwise as seen facing the airplane
At a preset time, a signal causes the plane to lower its tail flaps and it goes into a nose-down attitude. When this happens, the nose of the plane also swings towards the right. Explain why this happens.
A charge of 80 nC is uniformly distributed along the x axis from x = 0 to x = 2.0 m. Determine the magnitude of the electric field at a point on the x axis with x = 8.0 m
a. 30 N/C b. 15 N/C c. 48 N/C d. 90 N/C e. 60 N/C