Answer:
T surface = 3.9°C
Explanation:
given data
emissivity 0.6
absorptivity = 0.2
solar radiation is incident rate = 1200 W/m²
solution
we get here surface temperature by equality of emitted and absorbed heat rate that is
Q (absorbed) = Q (heat ) .................1
α Qinc = 
T surface = ![\sqrt[4]{\frac{\alpha Qinc}{\epsilon *\sigma * A} }](https://tex.z-dn.net/?f=%5Csqrt%5B4%5D%7B%5Cfrac%7B%5Calpha%20Qinc%7D%7B%5Cepsilon%20%2A%5Csigma%20%2A%20A%7D%20%7D)
..........................2
put here value and we get
T surface = ![\sqrt[4]{\frac{0.2*1000}{0.6*5.67**10^{-8}} }](https://tex.z-dn.net/?f=%5Csqrt%5B4%5D%7B%5Cfrac%7B0.2%2A1000%7D%7B0.6%2A5.67%2A%2A10%5E%7B-8%7D%7D%20%7D)
T surface = 276.9 K
T surface = 3.9°C
Answer:
As Ray L zapp is thinking about new strategies to test his new hash Table,hence therefore the best testing technique is Stubbing& mocking .
Answer:
the answer is below
Explanation:
a) The conductivity of graphite (σ) is calculated using the formula:
where f = frequency = 100 MHz, δ = skin depth = 0.16 mm = 0.00016 m, μ = 0.0000012
Substituting:
b) f = 1 GHz = 10⁹ Hz.
Answer:
A. Move closer to oncoming traffic
Explanation:
If traffic is approaching on your left and there is a child riding a bike to your right, you should move closer to oncoming traffic.
Answer:
As the temperature of a thermal radiator is increased
Group of answer choices
- the object appears redder.
- the object appears bluer.
- the object emits more power for the same area.
- the object emits less power for the same area.
- the object expands to keep the same power per units area.
<em>When the temperature of a thermal radiator increases ;</em>
- <em>the object emits more power for the same are</em>
- <em>the object becomes bluer</em>
Explanation:
Thermal radiation involves the transfer of heat between molecules of two substances without direct contact with each other. When a body is heated to a given temperature it begins to emit light which is transferred to nearby objects as thermal radiation. The medium through which the heat is transferred could be liquid, solid, or in a vacuum.
<h3>How temperature affects thermal radiation.</h3>
Temperature determines the amount of heat that is been radiated from a body. An increase in temperature would increase the thermal radiation of the body. The increase in the heat radiation results to increase in the thermal energy of the body. Also when a body is heated it tends to be bluer than a cool object, this is caused by the rapid movement of the molecules.
Therefore When the temperature of a thermal radiator increases ;
- the object emits more power for the same are
- the object becomes bluer
