Electromagnetic energy that is invisible to the human eye is known as
a. red light.
b. blue light.
c. yellow light.
d. ultraviolet light.

Which statement is true about an object that is moving in a circular motion due to centripetal force, f, when the radius of its circular motion is doubled? the new force then becomes equal to 2f the new force then becomes equal to f the new force then becomes equal to f/2 the new force then becomes equal to f2 the new force then becomes equal to 1/f