Why does a cell need a necleus?

A truck has four times the mass of a car and is moving with twice the speed of the car. If Kt and Kc refer to the kinetic energies of truck and car respectively, it is correct to say that:A) Kt = 16Kc. B) Kt = 4Kc. C) Kt = Kc. D) Kt = 2Kc.

You ride your bike for a distance of 30km. you travel ata a speed of 0.75km/minute. how many minutes does it take

A car starts from rest and accelerates at a constant rate in a straight line. In the first second the car moves a distance of 2.0 meters. How fast will the car be moving at the end of the second second

A hockey puck is hit by a hockey player at the goalie. The puck is hit with a 1200 newton force. The stick made contact for 0.1 seconds. What impulse was given to the puck?

If you decide you want to meet someone you met online, what should you do first? A) tell your bff B) call the person you met online on the phone c) tell your parents d) set up a meeting place

In order for an object to conserve it's total mechanical energy it is absolutely necessary that?

Your body is presently converting chemical potential energy from food into thermal energy at a rate of about 100 J/s, or 100 W. If heat were flowing out of you at a rate of about 200 W, would your body temperature go up or down?

Which energy depends the arbitrarily assigned zero level

What is a transverse wave

Object moving at a constant velocity will always have a