what is true of chemicals a- chemicals are never dangerous b- things containing chemicals cost alot of money c-chemicals are rarely found on earth d- chemicals are in many substances at home

What is a metal replacement reaction

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

Air can be considered a mixture. which statement does not explain why?