• A hockey ball of masso.2 Kg travelling at 10 ms- is struck by a hockey stick so as to return it along its original path with a velocity
at 2 m/s . Calculate the change of momentum occurred in the motion
of the hockey ball by the force applied by the hockey stick.

What is magnetic flux? explain faraday's law of induction.

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.