Question

3. What is the unit to measure the temperature? Celcius
4. When is an object said to be cold?​

Answer 1

Answer:

when the temperature is at low freezing point

Answer 2

Answer:

3

Celsius is currently a derived unit for temperature in the SI system, kelvin being the base unit. The abbreviation of Celsius is °C (degree Celsius) and the size of one Celsius degree is the same size as one kelvin. The unit and the actual Celsius scale was first presented by a Swede Anders Celsius in 1742.

4Cold and Hot are relative terms and are largely based on perception. If you put your hand against something that immediately begins withdrawing heat from the skin, your nerve endings will register 'cold' and start sending the appropriate signals to the brain to say the object is cold.

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