Question
A meteorite 1.20 cm in diameter is so hot immediately after penetrating the atmosphere that it radiates 20.0 kW of power. (a) What is its temperature, if the surroundings are at $20.0^\circ\textrm{C}$ and it has an emissivity of 0.800? (b) What is unreasonable about this result? (c) Which premise or assumption is responsible?
1. $5.59 \times 10^3 \textrm{ K}$
2. The melting point of granite is $1260^\circ\textrm{C}$. The meteorite temperature is much greater than this melting point. The meteorite would be a liquid.
3. The 20 kW radiant power is unreasonably large.
Solution Video