A car travels at a constant speed on a flat, circular track. Which factor, when doubled, will decrease the centripetal force on the car?

What is a carrier wave and how does it affect what you hear on the radio

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.