# physics

posted by .

E^2/(e^(E/T)-1)Evaluate dn/dE at fixed T and enter it below.

• physics -

Is E^2/(e^(E/T)-1) the function n(E,T) that you want to differentiate?

Is E = h*f/k where f is a frequency, h = Planck's constant and k is Boltzmann's contant? The dimensions of E and T must be the same.

It looks like you are trying to derive the formula for the peak frequency of the Planck blackbody function.

In any case, just use the rule for dfferentiating the derivative of the ratio of two functions.

d/dx (f(x)/g(x)) = [g(df/dx - f*dg/dx]/g^2
In your case, x = E, f(E) = E^2 and g(E) = e^(E/T) -1

## Similar Questions

1. ### Maths

Solve the equation 2x-5=7-6x Enter your answer as a fraction in its lowest terms in the box below using / for division. For example, enter as 5/2.
2. ### physics

A sailor strikes the side of her ship just below the waterline. She hears the echo of the sound reflected from the ocean floor directly below 2.00 s later. How deep is the ocean at this point?
3. ### grammar

Hey!Pls help me i am stuck with the sentence below. Seeing pulsation of the artery at the completion of this dissection. 1.This is a run-on that can be fixed with a period. 2.This is a run-on that can be fixed by adding a comma and …
4. ### physics

Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The object m1 is held at rest on the floor, and m2 rests on a fixed incline of θ = …
5. ### physics

Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The object m1 is held at rest on the floor, and m2 rests on a fixed incline of θ = …
6. ### algebra 1b

Use the table below to find the products of the two polynomials. Enter your answer in descending order in the box below. Enter exponents using the caret ( ^ ). For example, you would enter as 4x^2. Do not enter spaces in your answer. …
7. ### economics

A firm has fixed costs of \$30.00 and variable costs as indicated in the table below. Complete the table. Instructions: Round your answers so that you enter no more than 2 decimal places. Total Product Total Fixed Cost Total Variable …
8. ### physics

Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The object m1 is held at rest on the floor, and m2 rests on a fixed incline of θ = …
9. ### Math

How would you derive n(E)= E^2/((e^E/T) - 1) a) Evaluate dn/dE at fixed T. Leave answer in symbolic forms of E and T. b) dn/dT at fixed E.
10. ### Math. Need help

1.if g=5 and k=1, evaluate 9+gk a. 13 b. 14 c. 15 d. 16 2.Evaluate a-b^2/b if a = 10 and b = 2. a. 1 b. 3 c. 8 d. 32 3.Evaluate 3xy^2 - y if x = 2 and y = 5. a. 26 b. 30 c. 120 d. 145 4.Evaluate 2d + d^2/3 if d = 6. a. 4 b. 12 c. 14 …

More Similar Questions