Does anyone want to be friends? cause i'm lonely right now

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

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

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