Answer:
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The only three countries who do not use the metric system as their primary system of measurement are the United States, Liberia and Burma (Myanmar).
Other countries have adopted the system but do not use it in all cases, for example road distances and speeds are still measured in miles and miles per hour in the United Kingdom.
Answer:
The answer to your question is the Photoelectric effect.
Explanation:
When hot metal plate is placed in air at room temperature
Then due to temperature difference heat flow will start from higher temperature to lower temperature
Here heat flow is from hot plate to room
The heat flow here is of two types
1. Convection flow of heat
In this phenomenon the thermal energy is transferred from plate to room by the thermal motion of air molecules in the room
2. Radiation heat flow
In this phenomenon the thermal energy is transferred by electromagnetic waves which transmits from the plate
This flow of heat will continue till the temperature of room and plate will become equal
