In the last 30 years have the shellfish farmers seen a positive or negative impact on eelgrass?

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell