Which of the following is an indication of a chemical reaction? freezing
melting
release of heat
all of the above

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.