Answer:
sorry I dont now the answer bro i am so sorry xd ;'(
Answer: 100 N
Explanation:
F = ma = 0.5(200) = 100 N
Answer:
The emissivity of the radiation shield is
Explanation:
From the question we are told that
The temperature of the first parallel plate is
The temperature of the second parallel plate is
The emissivity of first plate is
The emissivity of first plate is
Generally the total radiation heat that is been transferred without the shield is mathematically represented as
Where is the Stefan-Boltzmann constant which has a value
Substituting values
From the question we are told the that using the radiation shield would reduce the radiation heat transfer by 15%
So the new heat transfer is
So
Now this new radiation heat transfer can be mathematically represented as
Where the emissivity of the radiation shield and n is the number of radiation shield
Substituting values