Number of valence electrons for calcium?

Which is the of these their statements correctly describes a key difference between aerobic activity and anaerobic activity

A molecule is broken down into its constituent atoms. do these atoms have the same properties as the molecule?

List three kinds of electromagnetic radiation and either how it is used or how it is prevented

Which of the following is an example of sound energy? A. a tv signal lost bc of a storm B. the waves from a star seen in the sky C. a light bulb giving off energy as heat D. waves moving through air after a crash

Which device transforms electrical energy to mechanical energy A. generator B. motor C. transformer D. magnet

Which is the best example of Newton's First Law of Motion? A small, lightweight ball and a large, heavy ball are dropped off the top of a very tall building. They both strike the ground at the same time.

A scientist does an experiment on mice. She feeds one group of mice regular food and a second group of mice blueberries. The scientist keeps all of the other conditions exactly the same.

A Jeep Rubicon has a mass of 2,630 kg. With a momentum of 55,200 kg m/s. What was the speed, in m/s, of the vehicle?

You have a box of filled with gas and by some process you double the number of atoms in the box, but now each one only has (on average) half as much energy as before the process started.

A car traveling 26 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is it's acceleration. ___m/s^2