Question

Which are examples of equilibrium? Check all that apply.

1. Water drips out of a faucet and down a drain.

2. A person's income and expenses are equal every month.

3. The pressure exerted on the inside of a balloon by the gas inside is equal to the pressure exerted on the outside of the balloon by the atmosphere.

4. The temperature of a metal increases as heat is added to it.

Answer 1

The equilibrium means that amount that are coming equals the amount that are going.
So the correct answers are
2. A person's income and expenses are equal every month.
3. The pressure exerted on the inside of a balloon by the gas inside is equal to the pressure exerted on the outside of the balloon by the atmosphere.

Answer 2

Options 2 & 3 are correct! :)

 OR options B and C