Which is the best example of potential energy?

holding a basketball in the air

rolling a ball across a flat table

flowing electric current through a wire

turning on a flashlight in a dark room

A wire with a circular cross section and a resistance R is lengthened to 9.66 times its original length by pulling it through a small hole. The total volume of the wire is unchanged. Find the resistance of the wire after it is stretched.

Why would waves from the sun not reach Earth if they were mechanical waves? Include in your answer what is required for the movement of mechanical waves.

Two cars collide in a collision. Which of the following best explains whether or not the atoms in the cars actually make contact? The atoms make physical contact.

In which of these locations would you usually find the youngest rocks

Rank the following from greatest energy to the least: a. A stationary 2kg ball 2m off the ground. b. A stationary 1kg ball 1.5m off the ground. c. A 1kg ball moving 3m/s, 2m off the ground. d. A 2kg ball moving 4m/s, 1.5 off the ground.

When the air in a submarine's huge air tanks is decompressed and it displaces the water in the ballast tanks with air, what does the submarine do? A. It sinks B. It floats C. It provides air to the passengers

The decomposition of a substance by an electric current is called

Along some shorelines, incoming waves cause the water to simply rise and fall rather that form a surf zone. What does this tell you about these shorlines?

Which word best describes the rate at which work is done? work energy power velocity

Explain why a valve would last longer in the pulmonary position than in the aortic position