Which of the following is true about a combustion reaction?

a. It is an endothermic reaction.

C. CO2 and H20 are produced.

b. Oxygen must be a reactant.

d. All of the above.

Water's states of matter include steam, liquid and ice. What about water is the same in these states? What can you conclude about what changes and what does not change during a change of state?

Aroldis Chapman can throw a baseball 103 miles per hour. Imagine he throws a baseball straight up into the air. How far would the ball go up before it begins to come back down? (hint: velocity is zero at the top)

How do I figure out 7.68+3.18:12=

Which layer of the atmosphere would you be in if you were caught in a rain storm?

How high does the atmosphere extend from the earth

During a free fall Swati was accelerating at - 9.8m/s2. After 120 seconds how far did she travel? Use the formula = 1/2 * t2 to solve your answer. (Do not forget to keep units in your answer.)

How do sinkholes form?

What is the result of wave motion on water particles? A.) Water particles are pushed forward as they move up and down. B.) Water particles barely move forward as they move up and down. C.) Water particles are pushed down as they move side to side. D.

Nitric acid (HNO3) and potassium hydroxide (KOH) combine in a neutralization reaction to form water and a salt. Which of the following correctly identifies the salt that is produced? OHK NOK2 KNO3 HOH

When the speed of something is the same what is that called