We should use more renewable energy.

We are using LED bulbs for energy saving.

What do you call 'time' in dialect?

I've been waiting for hours at that shop, but the meal still hasn't come out.

I exercise at the gym for two hours every day.

Have you checked the timetable for the new semester?

He utilized his project management skills to start a new business.

Ionization energy is the minimum energy required for an atom or molecule to lose an electron.

The potential energy of this ball is large because it is in a high position.

The potential energy of this ball is proportional to its height.