Work and energy have same unit give reason

How much work is done when a 48-kg stack of books are lifted 2m with a net force of 25 N? A. 12.4 J B. 100 J C. 50 J D. 96 J ... ?

This is the reduction in the density of a medium

If the sun died would it create a black hole?

A 12 volt car battery produces more current than a 1.5 volt battery for a TV remote because ... A. the tv remote has more kinetic energy. B. the tv remote has a greater difference in electric potential energy. C.

According to the law of inertia, if you see an object in motion slowing down, what can you conclude?

A grocery shopper tosses a (n) 9.1 kg bag of rice into a stationary 19.3 kg grocery cart. The bag hits the cart with a horizontal speed of 6.6 m/s toward the front of the cart. What is the final speed of the cart and bag? Answer in units of m/s.

Where do most metamorphic rocks processes take place?

A 13,500 kg railroad freight car travels on a level track at a speed of 4.5 m/s. It collided and coupled with a 25,000 kg second car, initially at rest and with brakes released. What is the speed of the two cars after collision

What type of waves move energy forward, but the source makes up and down

Why do helium balloons float? Talk about density of atoms and compare to elements in the air.