Which of the following causes a chemical change?

A. burning

B. moving

C. shattering

Before beginning an experiment, Mrs. Wilson warns her science class not to drop the bar magnets on the floor. What is the most likely reason for Mrs. Wilson's warning?

Determine the average acceleration for x (t) = 19t^2+7t^3 for a time interval between 3 and 9 seconds

What the difference between convergence, frontal wedging, orographic uplift, and convective uplift?

Stars are powered by nuclear fusion reactions. True or false?

When the pressure at the bottom of a submerged object is greater than the pressure at the top of submerged object, buoyant force is produced. A. True B. False

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?

A 2-kg object is dropped from a height of 1000 m. What is the force of air resistance on the object when it reaches terminal velocity

What is the approximate increase in size from a 1 w to a 2w carbon resistor?

I am looking for this answer : Which shows a correct order of steps in the scientific method? develop a hypothesis, analyze data, make observations, draw conclusions make observations, draw conclusions, develop a hypothesis, analyze data.

A gas in a piston is compressed doing - 439 j of work, and its internal energy increases by 318 j. how much heat flows? (be careful with + and -. + w = expansion. + q = added, + u = temp goes up) (unit = j)