Radio waves are used to transmit TV signals. Explain why plastic is not a suitable material for a TV aerial.

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20

Who was the first scientist to measure speed as distance over time?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter