Which of the following represents a physical change in matter?
a).combustion of carbon to form carbon dioxide
b).rusting
c).melting a stick of butter
d).seperating hydrogen gas from water

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. a car travels 6 miles north, 3 miles east, and then 2 miles south. what is the distance traveled? a.7 b.11

Set comes up with for examples of sound waves ocean wave light wave and hand wave which of tonys examples is not an actual scientific wave

Some of the money that people deposit into a bank eventually becomes a interjection into the economy when the bank