S ditter after a physical change? s differ after a chemical change?
broke instead of bent, would it be a chemical or phy
s breaking is a physical or chemical change? Defence
Chemical changes are caused by an input in energy
end correct? Why or why not?
Fesponding activities were
d Tracie Mastronicola.
HW 314/21 (Fro

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.