Understanding Joule's Mechanical Equivalent of Heat

Who discovered the mechanical equivalent of heat?

• Michael Faraday

• Isaac Newton

• James Prescott Joule

• Albert Einstein

What was the main purpose of Joule's experiment?

• To study electromagnetic waves

• To calculate gravitational force

• To determine the mechanical equivalent of heat

• To measure the speed of light

In Joule's experiment, what was used to churn the water in the calorimeter?

• An electric motor

• A hand-cranked fan

• A magnetic stirrer

• A rotating spindle

What type of energy transformation occurs in Joule's experiment?

• Chemical to electrical

• Potential to kinetic to heat

• Thermal to mechanical

• Nuclear to thermal

What is the formula for calculating the mechanical equivalent of heat in Joule's experiment?

• J = mgh/θ

• J = 2mghn/(m1 + W)(θ2 - θ1)

• J = W/Q

• J = 2mgh/n