3 examples in which friction is useful

How coal power plants produce electrical energy to power our homes

Two samples of water sample a mass at 100 G BB mass at 250 g they both have the same initial temperature and are allowed to cool to room temperature what would be the temperature change in Sample be compared to sample a

Explain how "elastic potential energy" dramatically changed the sport of pole vaulting when flexible fiberglass poles replaced stiffer wooden poles.

While an emf source supplies energy to a circuit, that energy is dissipated when the current passes through resistance. In dealing with circuits though, it is often more useful to know the rate at which energy is changing.

1. What 2 things can you check prior to starting your car to evaluate if it is safe to drive?

A small rock remains at rest in outer space while an astronaut pushes horizontally on it with a force of 20 N. Which of the following must be true? A. There is another horizontal force acting on the rock. B.

If an igneous rock has very large crystals of minerals that you can see when looking at it, which type of igneous rock is it

You have a 60-foot roll of fencing and a large field. You want to make two paddocks by continuing the fencing down the middle of a rectangular enclosure. What are the dimensions of the largest such enclosure you can make?

Crystallization is a separation technique used to produce rock candy from a sugar solution. true or false

A car traveling in a straight line has a velocity of 3.79 m/s at some instant. After 5.4 s, its velocity is 11.9 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2