Question

Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat transfer by radiation from $2.5 \text{ m}^2$ of $1196 \text{ deg C}$ fresh lava into $30 \text{ deg C}$ surroundings, assuming lava's emissivity is $1.2$. $\sigma = 5.67 \times 10^{-8} \text{ J/(s m}^2 \text{ }^\circ\text{C)}$ Use the sign convention for heat leaving or entering the system. $\frac{Q}{t} = \text{ } \text{kW}$

Name: radiation makes it impossible to stand close to a hot lava flow calculate the rate of heat transfer by radiation from 25 text m2 of 1196 text deg c fresh lava into 30 text deg c surroundings 58873
Uploaded: 2019-09-24T05:08:32-08:00
Duration: 1 min 55 s
Channel: Charles Magnusen
Description: radiation makes it impossible to stand close to a hot lava flow calculate the rate of heat transfer by radiation from 25 text m2 of 1196 text deg c fresh lava into 30 text deg c surroundings 58873

          Radiation makes it impossible to stand close to a hot lava flow.
Calculate the rate of heat transfer by radiation from $2.5 \text{ m}^2$ of
$1196 \text{ deg C}$ fresh lava into $30 \text{ deg C}$ surroundings, assuming
lava's emissivity is $1.2$.
$\sigma = 5.67 \times 10^{-8} \text{ J/(s m}^2 \text{ }^\circ\text{C)}$
Use the sign convention for heat leaving or entering the system.
$\frac{Q}{t} = \text{ } \text{kW}$

radiation makes it impossible to stand close to a hot lava flow calculate the rate of heat transfer by radiation from 25 text m2 of 1196 text deg c fresh lava into 30 text deg c surroundings 58873

Added by Alan W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Charles Magnusen

09/24/2019

Step 1

Given values: Area, $A = 2.5 \text{ m}^2$ Temperature of lava, $T_{lava} = 1196 \text{ }^\circ\text{C}$ Temperature of surroundings, $T_{surroundings} = 30 \text{ }^\circ\text{C}$ Emissivity, $e = 1.2$ Stefan-Boltzmann constant, $\sigma = 5.67 \times 10^{-8} Show more…

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Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat transfer by radiation from $2.5 \text{ m}^2$ of $1196 \text{ deg C}$ fresh lava into $30 \text{ deg C}$ surroundings, assuming lava's emissivity is $1.2$. $\sigma = 5.67 \times 10^{-8} \text{ J/(s m}^2 \text{ }^\circ\text{C)}$ Use the sign convention for heat leaving or entering the system. $\frac{Q}{t} = \text{ } \text{kW}$