Answer:
F=X.F=mxq. 3. 1 N/kg=0.5kg g=9.80
I'm pretty sure this is A
Answer:An incandescent light bulb gives only energy of the system in the form of heat. ... The roof of a house is stable but it receives energy from the surroundings and transfers energy through it towards lower temperature side which includes no mass transfer. So, it is best considered as closed system.
Explanation:
