Answer:
Explanation:
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Answer:
Planks law:
Planks law gives the theoretical distribution for emissive power of black body.The emissive power for is given as follows
Planks distribution as a function of wavelength for different temperature.
![E_{\lambda,b}=\dfrac{C_1}{\lambda^5 [exp{\frac{C_2}{\lambda T}-1}]}](https://tex.z-dn.net/?f=E_%7B%5Clambda%2Cb%7D%3D%5Cdfrac%7BC_1%7D%7B%5Clambda%5E5%20%5Bexp%7B%5Cfrac%7BC_2%7D%7B%5Clambda%20T%7D-1%7D%5D%7D)
Where 
is the constant.
Important points for Planks distribution
1.At the given wavelength when temperature increases then emissive power will increase.
2.When temperature is increases then then distribution shift towards the left side.
3. We can assume that sun as a black body at 5800 K.
Answer:
Work done = 125π J
Explanation:
Given:
P = P_i * ( 1 - (x/d)^2 / 25)
d = 5.0 cm
x = 5 * d cm = 25d
Pi = 12 bar
Work done = integral ( F . dx )
F (x) = P(x) * A
F (x) = (πd^2 / 4) * P_i * (1 - (x/d)^2 / 25)
Work done = integral ((πd^2 / 4) * P_i * (1 - (x/d)^2 / 25) ) . dx
For Limits 0 < x < 5d
Work done = (πd^2 / 4) * P_i integral ( (1 - (x/d)^2) / 25)) . dx
Integrate the function wrt x
Work done = (πd^2 / 4) * P_i * ( x - d*(x/d)^3 / 75 )
Evaluate Limits 0 < x < 5d :
Work done = (πd^2 / 4) * P_i * (5d - 5d / 3)
Work done = (πd^2 / 4) * P_i * (10*d / 3)
Work done = (5 π / 6)d^3 * P_i
Input the values:
Work done = (5 π / 6)(0.05)^3 * (1.2*10^6)
Work done = 125π J
Answer:
Chemical Engineers use chemistry, math and physics to design and use to make chemical products. The fibers in clothing are designed by chemical engineers.
Answer:
The surface temperature increases when two bodies are rubbed against each other due to friction.
Explanation:
No object has a perfectly even surface. So, when two bodies with uneven surfaces are rubbed against each other, they experience friction.
Friction is a resistance experienced by the two bodies when they are moved against each other.
The friction between the two surfaces, converts the kinetic energy of the movement to the thermal energy.
Thus, resulting in rise in the surface temperature of the two bodies.
Therefore, when two bodies are rubbed against each other, the surface temperature increases due to friction.
