A converging lens makes a parallel beam of light from a distant object to O to become invisible
to be visible with different colors
O come together to focus at a single point
come apart from a single point of focus

The consumption of fossil fuels could be

Describe uniform velocity and variable velocity in short

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