A car rolls down a ramp. What is the force acting on the car that causes the movement down the ramp?

Earthquakes cannot occur far away from pleat boundaries true or false

The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region?

The experimental density of a metal cylinder was found to be 7.52 g/ml. if the actual density is equal to 7.25 g/ml, then the percent error is

Which characteristic should a good specific question have?

Salt is added to water. You speed up dissolving by stirring the salt into the water. Then your teacher challenges you to separate the salt from the water.

Calculate how many moles of glycine are in a 160.0-g sample of glycine. express your answer using four significant figures.

Which of the following words correctly describes CO2? Select all that apply A. Its a substance b its a compound c its a element D its a mixture

A certain reaction has an activation energy of 51.64 kj/mol. At what temperature Kelvin will the reaction be 5.50 times faster than it did at 343K?

What allows electrons to flow between electrodes in an electrochemical cell? a - conducting wire b - salt bridge c - electrolyte solutions d - battery

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen? 1 mol of oxygen has fewer molecules. 1 mol of oxygen has more molecules. Each sample has the same number of molecules.