Which is classified as nonpolar covalent? 1. hydrogen and iodine
2. carbon and sulfur
3. hydrogen and chlorine
4. nitrogen and hydrogen

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of