Answer: Temperature T = 218.399K.
Explanation:
Q= 129W/m2
σ = 5.67 EXP -8W/m2K4
Q= σ x t^4
t = (Q/σ)^0.25
t= 218.399k
Answer:
Q = 62 ( since we are instructed not to include the units in the answer)
Explanation:
Given that:
![n_{HCl} = 3 \ kmol\\n_{Ar} = 7 \ k mol](https://tex.z-dn.net/?f=n_%7BHCl%7D%20%3D%203%20%5C%20kmol%5C%5Cn_%7BAr%7D%20%3D%207%20%5C%20k%20mol)
![T_1 = 27^0 \ C = ( 27+273)K = 300 K](https://tex.z-dn.net/?f=T_1%20%3D%2027%5E0%20%5C%20C%20%3D%20%28%2027%2B273%29K%20%3D%20%20300%20K)
![P_1 = 200 \ kPa](https://tex.z-dn.net/?f=P_1%20%3D%20200%20%5C%20kPa)
Q = ???
Now the gas expands at constant pressure until its volume doubles
i.e if ![V_1 = x\\V_2 = 2V_1](https://tex.z-dn.net/?f=V_1%20%3D%20x%5C%5CV_2%20%3D%202V_1)
Using Charles Law; since pressure is constant
![V \alpha T](https://tex.z-dn.net/?f=V%20%5Calpha%20T)
![\frac{V_2}{V_1} =\frac{T_2}{T_1}](https://tex.z-dn.net/?f=%5Cfrac%7BV_2%7D%7BV_1%7D%20%20%3D%5Cfrac%7BT_2%7D%7BT_1%7D)
![\frac{2V_1}{V_1} =\frac{T_2}{300}](https://tex.z-dn.net/?f=%5Cfrac%7B2V_1%7D%7BV_1%7D%20%20%3D%5Cfrac%7BT_2%7D%7B300%7D)
![T_2 = 300*2\\T_2 = 600](https://tex.z-dn.net/?f=T_2%20%3D%20300%2A2%5C%5CT_2%20%3D%20600)
mass of He =number of moles of He × molecular weight of He
mass of He = 3 kg × 4
mass of He = 12 kg
mass of Ar =number of moles of Ar × molecular weight of Ar
mass of He = 7 kg × 40
mass of He = 280 kg
Now; the amount of Heat Q transferred = ![m_{He}Cp_{He} \delta T + m_{Ar}Cp_{Ar} \delta T](https://tex.z-dn.net/?f=m_%7BHe%7DCp_%7BHe%7D%20%5Cdelta%20T%20%20%2B%20m_%7BAr%7DCp_%7BAr%7D%20%5Cdelta%20T)
From gas table
![Cp_{He} = 5.9 \ kJ/Kg/K\\Cp_{Ar} = 0.5203 \ kJ/Kg/K](https://tex.z-dn.net/?f=Cp_%7BHe%7D%20%3D%205.9%20%5C%20kJ%2FKg%2FK%5C%5CCp_%7BAr%7D%20%20%3D%200.5203%20%5C%20%20kJ%2FKg%2FK)
∴ Q = ![12*5.19*10^3(600-300)+280*0.5203*10^3(600-300)](https://tex.z-dn.net/?f=12%2A5.19%2A10%5E3%28600-300%29%2B280%2A0.5203%2A10%5E3%28600-300%29)
Q = ![62.389 *10^6](https://tex.z-dn.net/?f=62.389%20%2A10%5E6)
Q = 62 MJ
Q = 62 ( since we are instructed not to include the units in the answer)
Answer:
Coal or oil-fired power plants generate heat, which is then used to generate steam, which drives turbines that generate electricity.
<em>I hope this helps you</em>
<em>:)</em>
Answer:
Rf=470 ohms R1=10ohms, Schmatic is attached
Explanation:
For non-inverting amplifiers
Gain= 1+(Rf/R1)
480=1+(Rf/R1)
470=Rf/R1
if Rf=470Ω and R1=10Ω
then,
47=47
Answer:
the sun gives off light while at the same time gives off heat. the shoe box cooker takes that heat and light and reflects it around the shoe box. then the heat settles down into whatever is in the shoe box. the heat after being reflected around the shoe box is magnified by the foil wrapped in the box thus allowing the food or drink to be heated. the foil is a conductor of heat because it is metal .
Explanation:
hope this helps!