A worker is melting samples of various metals. Which sample will require the most heating to melt? (check upload for chart)
A.
1 kg of aluminum
B.
2 kg of nickel
C.
3 kg of silver
D.
5 kg of tin

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

The internal energy of the system we can term it as total potential energy and kinetic energy. energy flows out of the surrounding from the system then we can say that the internal energy of the final state is lower than its initials. the sign of  δesystem is negative.δesystem = efinal - einitial=-ve  efinal  ∠einitial.

A. pipe, good luck, hope you get it right

Flourine clead dlithium bkrypton a