Arrange the objects in order from least to greatest potential energy. assume that gravity is constant. (use pe = m × g × h.)

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask