Answer:
get the surface laptop 3
Explanation:
its better quality and performs excellent!
Answer:
M/A = 0.425 g/cm²
Explanation:
<u>Given the following data;</u>
Mass = 192 grams
Dimensions = 7 * 10 inches.
To find the mass per unit area;
First of all, we would determine the area of the lead sheet;
Area = 7 * 10
Area = 70 in²
<u><em>Conversion:</em></u>
1 square inch = 6.452 square centimeters
70 inches = 70 * 6.452 = 451.64 square centimeters
Next, we find the mass per unit area;
M/A = 192/451.64
<em>M/A = 0.425 g/cm²</em>
Answer:
1) the mean surface temperature of earth.
2) precipitation and sunshine
3) air and wind movement.
Answer:
a) 0.39795 kJ/K
b) 79.589.37 kJ
Explanation:
m = Mass of air = 2 kg
Temperature = 200 K
P₁ = Initial pressure = 300 kPa
P₂ = Final pressure = 600 kPa
R = mass-specific gas constant for air = 287.058 J/kgK
a) For isentropic process
![\Delta S=mRln\frac{P_1}{P_2}\\\Rightarrow \Delta S=2\times 287.058ln\frac{300}{600}\\\Rightarrow \Delta S=-397.95\ J/K](https://tex.z-dn.net/?f=%5CDelta%20S%3DmRln%5Cfrac%7BP_1%7D%7BP_2%7D%5C%5C%5CRightarrow%20%5CDelta%20S%3D2%5Ctimes%20287.058ln%5Cfrac%7B300%7D%7B600%7D%5C%5C%5CRightarrow%20%5CDelta%20S%3D-397.95%5C%20J%2FK)
∴ Entropy is generated in the process is 0.39795 kJ/K
b)
![W=mRTln\frac{P_1}{P_2}\\\Rightarrow W=2\times 287.058\times 200ln\frac{300}{600}\\\Rightarrow W=-79589.37\ J](https://tex.z-dn.net/?f=W%3DmRTln%5Cfrac%7BP_1%7D%7BP_2%7D%5C%5C%5CRightarrow%20W%3D2%5Ctimes%20287.058%5Ctimes%20200ln%5Cfrac%7B300%7D%7B600%7D%5C%5C%5CRightarrow%20W%3D-79589.37%5C%20J)
∴ Amount of lost work is 79.589.37 kJ