What evidence can show if a reaction is endothermic or exothermic? A
the presence of bubbles
B
a temperature change
C
glass breaking
D
none of the above

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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