Which best describes what happens when light traveling through air enters water at an angle?

a. it moves along straight lines in air and changes direction when it enters water.

b. it moves in a curve in air and moves in straight lines when it enters water.

c. it moves along straight lines in air and continues along the same lines when it enters water.

d. it moves in a curve in air and continues moving in the same curve when it enters water.

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

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