What do you call 'time' in dialect?

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

A day has 24 hours.

How many megajoules is this energy?

There is an old incandescent light bulb in my room.

This miniature light bulb is perfect for a small lamp.

We should save electricity for energy conservation.

We should increase the use of alternative energy to protect the earth.

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.