Copper(Il) oxide catalyses the decomposition of aqueous hydrogen peroxide to produce oxygen and water. In a laboratory experiment, aqueous hydrogen peroxide is shaken with

copper(Il) oxide in a test tube.

What is observed in the test tube after the reaction is completed?​

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?