Atree was chopped down and cut up in a local forest. the tree changed in shape.

which kind of change took place?

a. change in reaction

b. phase change

c. physical change

d. chemical change

Which item is most likely part of the safety contract

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

A20 liter cylinder of helium at a pressure of 150 atm and a temperature of 27°c is used to fill a balloon at 1.00 atm and 37°c. what is the volume of the balloon? a. 0.14 liters b. 3000 liters c. 2900 liters d. 2400 liters e. 3100 liters