When magnesium metal is heated in air it begins to release large amounts of heat and light. what kind of a reaction is this an example of?

a. a fusion reaction

b. a fission reaction

c. a combustion reaction

d. an endothermic reaction

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

What are similarities and differences between refraction, reflection, diffraction and absorption?

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points