1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
blondinia [14]
3 years ago
11

Radiant heat makes it impossible to stand close to a hot lava flow. Calculate the rate of heat loss by radiation from 1.00 m^2 o

f 1110°C fresh lava into 36.2°C surroundings, assuming lava's emissivity is 1.
Physics
1 answer:
VARVARA [1.3K]3 years ago
8 0

The rate of heat loss by radiation is equal to <u>-207.5kW</u>

Why?

To calculate the heat loss rate (or heat transfer rate) by radiation, from the given situation, we can use the following formula:

HeatLossRate=E*S*A*((T_{cold})^{4} -(T_{hot})^{4} )

Where,

E, is the emissivity of the body.

A, is the area of the body.

T, are the temperatures.

S, is the Stefan-Boltzmann constant, which is equal to:

5.67x10^{-8}\frac{W}{m^{2}*K^{-4} }

Now, before substitute the given information, we must remember that the given formula works with absolute temperatures (Kelvin), so,  we need to convert the given values of temperature from Celsius degrees to Kelvin.

We know that:

K=Celsius+273.15

So, converting we have:

T_{1}=1110\°C+273.15=1383.15K\\\\T_{2}=36.2\°C+273.15=309.35K

Therefore, substituting the given information and calculating, we have:

HeatLossRate=E*S*A*((T_{cold})^{4} -(T_{hot})^{4} )

HeatLossRate=1*5.67x10^{-8}\frac{W}{m^{2}*K^{-4} }*1m^{2} *((309.35K)^{4} -(1383.15})^{4} )\\\\HeatLossRate=5.67x10^{-8}\frac{W}{K^{-4} }*(95697.42K^{4} -3.66x10^{12}K^{4})\\ \\HeatLossRate=5.67x10^{-8}\frac{W}{K^{-4} }*(-3.66x10^{12} K^{4})=-207522W=-207.5kW

Hence, we have that the rate of heat loss is equal to -207.5kW.

You might be interested in
★CHECK MY ANSWER PLEASE★
Sergeu [11.5K]
You are correct!
Happy to assist you!
8 0
3 years ago
Read 2 more answers
Which of the following is a force acting between objects that do not touch?
kirill [66]
The answer is B friction force
3 0
3 years ago
Read 2 more answers
An HR manager is asked to meet with upper management to discuss the
amm1812

Answer:

the answer to this question perhaps is service

3 0
3 years ago
Read 2 more answers
El resultado de pasar a notación científica la cifra 2 000 000 000 · 10 -15
tensa zangetsu [6.8K]
19,999,985 nomas creo y soy positivo que si es pero puedes ablar ingles
6 0
2 years ago
Which data set has the largest range?
likoan [24]

Answer:

ummm there is nothing attached :(

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wave
    14·1 answer
  • according to Newton's third law what is the equal and opposite force to the downward force of gravity pulling on a man standing
    8·2 answers
  • Consider two rocks with masses of 1 and 10 kilograms. What is the relation between their inertias? Between their masses? Between
    11·1 answer
  • The speed of light in a material is found to be 2.07 x 108 m/s. What is the most likely material from the options below if the s
    7·2 answers
  • Atomic number equals the number of _______ or the number of ______. * giving brainly*
    9·2 answers
  • The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at it
    7·1 answer
  • What happens to a muscle when you exercise it?
    6·2 answers
  • Which process produces rising air when mountains push the air upward?
    7·2 answers
  • At its peak, a tornado is 53.0 m in diameter and carries 465-km/h winds. What is its angular velocity in revolutions per second?
    10·1 answer
  • How much kinetic energy does a moving 6 kg object have If It moves with a velocity of<br> 3 m/s?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!