Which of these is caused by a chemical change?
a) the honey in a jar crystallizes and will no longer pour.
b) the skin of a banana turns from green to yellow as it ripens.
c) a box of powdered brown sugar turns into a solid brick over time.
d) the salt crystals in a shaker cake and will no longer pour
just the answer .

What are the applications of electromagnetic waves

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.

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished