Which of the following is a definite indicator of a chemical change?

Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.

Explanation:

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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