Scientists described light as a wave because the results of many experiments with light demonstrated that light behaves as a wave. light is now described as having properties of both a wave and a particle.
what is the most likely reason why this change was made?
a. enough scientists voted to accept the change.
b. data collected from many experiments could not be explained using waves.
c. a well-known scientist published a paper that described light as a particle.
d. a single experiment’s results demonstrated both wave and particle properties.

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Amerry-go-round of radius r, shown in the figure, is rotating at constant angular speed. the friction in its bearings is so small that it can be ignored. a sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. the sandbag does not slip or roll upon contact with the merry-go-round. how would you rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round from largest to smallest. a) m = 10kg, r = 0.25r b) m = 20kg, r = 0.25r c) m = 10kg, r = 0.50r d) m = 10kg, r = 1.0r e) m = 15kg, r = 0.75r f) m = 40kg, r = 0.25r