Hot coffee in a mug cools over time and the mug warms up. which describes the energy in this system?

the average kinetic energy of the particles in the mug decreases.

the average kinetic energy of the particles in the coffee increases.

thermal energy from the mug is transferred to the coffee.

thermal energy from the coffee is transferred to the mug.

Thermal energy from the coffee is transferred to the mug.

Explanation:

1) Temperature is a measure of average kinetic energy of the particles in a substance.

2) The higher the kinetic energy the higher the temperature

3) Thermal energy is the kinetic energy transferred from a hot substance to a cold one.

4) Therefore, since the coffe is hot and the mug is cold:

a) The kinetic energy will be transferred from the hot coffe to the cold mug, which is that the thermal energy from the coffe is trnasferred to the mug (the last option is true).

b) The mug, which is colder than the coffe initially, gets warmer, so the average kinetic energy of the particles in the mug increases, making the first choice false.

c) The coffee, which is hotter than the mug initially, is cooling over time, so the average kinetic energy of the particles in the coffe decreases, making the second choice false.

d) The thermal energy is transferred from the hot coffe to the cold mug, so the third choice is false, and the only true statement is the last choice.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

answer: good job it's all correct !

explanation: