Question

Ten scouts lined up around the campfire at a distance of 3.5 m from the fire. If the campfire temperature is 375 degrees C and the temperature received by the children is 75 degrees C, with an emissivity value of 0.8 and the Boltzmann constant at 5.67 x 10^(-8) W / m^2 K^4, calculate the heat received by children for 2 minutes.

Answer 1

The question is asking for the heat received by children from a campfire calculated using radiation principles, but it cannot be answered without knowing the receiving area on the children.

Step-by-step explanation:

The question involves calculating the heat received by children from a campfire using the Stefan-Boltzmann law of radiation. However, the question as stated does not provide enough information to make the calculation because the size of the receiving area on the child (parallel to the fire and absorbing the radiation) is not given. Normally, you would use the formula: Power = emissivity × Boltzmann constant × area × (temperature difference)^4 and then integrate over time to find the total heat received. Since the area is missing from the question, we are unable to perform this calculation.