Is the speed of light the same in any material?

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

What will a positive and a negative charge do if they are separated from each other?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n