Thermodynamics: The Stefan Boltzmann Law

The video tutorial explains Stefan's Law, which states that all objects radiate heat. It introduces the equation for Stefan's Law, highlighting constants like Stefan's constant and emissivity. An example is provided to calculate energy loss using the law, converting temperatures to Kelvin and applying the formula to find power and energy loss in joules.

What does Stefan's Law primarily state about objects?

• All objects reflect sound.

• All objects absorb light.

• All objects emit visible light.

• All objects radiate heat.

Which of the following is NOT a component of Stefan's Law equation?

• Stefan's constant

• Emissivity constant

• Gravitational constant

• Surface area

What does the emissivity constant depend on?

• The material of the object

• The size of the object

• The temperature of the object

• The color of the object

In the practical example, what is the first step to calculate energy loss using Stefan's Law?

• Calculate the emissivity

• Convert temperatures to Kelvin

• Find the surface area

• Convert time to minutes

How much energy is lost in the given example over the specified time?

• 1,000 joules

• 50 watts

• 93,500 joules

• 103.92 watts