Question 1

What is absolute zero?

Accepted Answer

Absolute zero is the lowest possible temperature, defined as 0K, -273.15°C, or -459.67°F. It is the point at which molecular motion stops completely.

Question 2

Why does the Kelvin scale have no degrees symbol?

Accepted Answer

The Kelvin scale is an absolute temperature scale where zero represents absolute zero. It uses 'K' rather than '°K' because it measures fundamental energy, not degrees above a reference point.

Question 3

Which temperature scale is most commonly used worldwide?

Accepted Answer

Celsius is the most widely used temperature scale for everyday measurements worldwide. However, the United States commonly uses Fahrenheit.

Question 4

What's the difference between Kelvin and Celsius scales?

Accepted Answer

The Kelvin and Celsius scales have the same size units (a one-degree change is the same in both), but Kelvin starts at absolute zero while Celsius sets 0° at the freezing point of water.

Question 5

What temperature is the same on both Fahrenheit and Celsius scales?

Accepted Answer

-40° is the same temperature on both the Fahrenheit and Celsius scales. This is the only point where the two scales intersect.

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