Answer: The correct option is 2.
Explanation: Heat flow is defined as the transfer of energy from hotter object to cooler object when two objects are kept together at different temperatures. As the energy remains conserved, so the heat flow will take place until the equilibrium is attained.
In the above asked question, Object A is at 40° C and Object B is at 80° C.
Object B is at higher temperature, so the heat flow will take place from Object B to Object A.
Hence, the correct option is 2.
Digesting of food because stomaci acid reaction makes things melt w/ enzymes
C funnel because the funnel would have a large enough entrance to put a solid through
The first reaction is a synthesis reaction (A+B -> AB)
