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a 60 kilogram adult and a 30 kilogram child are passengers on a rotor ride at an amusement park. when the rotating hollow cylinder reaches a constant speed, v, the floor moves downward. both passengers stay "pinned" against the wall of the rotor.

compared to the magnitude of the acceleration of the adult, the magnitude of the acceleration of the child is

a) greater
b) less
c) the same

the answer is c but i don't understand why

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

What happens to an isotope during radioactive decay?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to