How to interpret e=mc2

How fast do you need to swing a 250-g ball at the end of a string in a horizontal circle of 0.6-m radius so that the string makes a 39 degree angle relative to the horizontal?

Which process produces the energy radiated by the star when it becomes a main sequence star?

What are the two factors that determine an objects gravitational potential energy

You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to her house. How far away is her house from where you started?

An astronaut has a mass of 70 kg on earth. What would her mass be in mars? What would her weight be on mars?

Why is a ehephent so big is it just big or are we so small?

Which of the following traits might be considered an adaptation fora rabbit living in the Arctic?

What is Newtons 2nd law of motion?

A truck is using a hook to tow a car whose mass is one quarter that of the truck. If the force exerted by the truck on the car is 6000 N, then the force exerted by the car on the truck isa. 1500 Nb, 24000 Nc, 6000 Nd, 12000 N

A car traveling at a speed of v can brake to an emergency stop in a distance x. assuming all other driving conditions are all similar, if the traveling speed of the car doubles, the stopping distance will be