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cestrela7 [59]
2 years ago
6

The temperature of a black body is 500 and its radiation is of wavelength 600 . If the number of oscillators with energy is 100

, 000, calculate the number of oscillators in the black body with energy 1 . (Accoding to Max. Planck, the number of oscillators with energy ℎ at a particular frequency is given by = = − ( ⁄ ) = − ( ⁄ ) (10 Marks) (b) Calculate the peak wavelength of a black body's radiation if the black body is at a temperature of 20 , 000 . (5 Marks)
Physics
1 answer:
stiks02 [169]2 years ago
4 0

Answer: An equation is missing in your question below is the missing equation

a) ≈ 8396

b) 150 nm/k

Explanation:

<u>A) Determine the number of Oscillators in the black body</u>

number of oscillators = 8395

attached below is the detailed solution

<u>b) determine the peak wavelength of the black body </u>

Black body temperature = 20,000 K

applying Wien's law / formula

λmax = b / T  ------ ( 1 )

T = 20,000 K

b = 3 * 10^6 nm

∴  λmax = 150 nm/k

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Answer:

B. 17m/s

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In this case, after 3 seconds, the speed of the car will be 17 m/s. This inference was got by tracing the position of 3s in the x-axis to the value on the y-axis. Doing this, the best inference for the speed of the car after 3 seconds is 17m/s.

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A football punter wants to kick the ball so that it is in the air for 4.5 s and lands 50 m from where it was kicked. Assume that
irakobra [83]

Answer:

(a) The angle of projection is 63 degree.

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Height, h = 1 m

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time, t = 4.5 s

Let the initial velocity is u and the angle is A.

(a) Horizontal distance = horizontal velocity x time

50 = u cos A x 4.5

u cos A = 11.1 .....(1)

Use second equation of motion in vertical direction

h = u t + 0.5 gt^2\\\\- 1 = u sin A \times 4.5 - 0.5 \times 9.8\times 4.5^2\\\\u sin A = 21.8 ..... (2)

Divide (2) by (1)

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3 years ago
Name the two ends of a magnet
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The positive and the negative side
I hope this helps :)
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3 years ago
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You have to travel 5000 meters. You only have two minutes (120 seconds) to get there. How fast must you travel to get there in t
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3 years ago
La corriente en un circuito se triplica conectando una R1 = 500 Ω en paralelo con la resistencia R del circuito. Determinar R en
Alexxx [7]

Answer:

R = 1000 ohm

Explanation:

In a circuit with a resistor R, the current is

           V = i R

            i₀ = V / R

a resistor R₁ is placed in parallel and the current is tripled i = 3 i₀

           V = i Req

            i = V / Req

           3i₀ = V / Req

           

we substitute

           3 (V / R) = V / Req

           3 / R = 1 / Req

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the equivalent resistance of the two resistors in parallel is

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              R_{eq} = \frac{R \ R_1}{R + R_1}

              R / 3 = \frac{R \ R_1}{R + R_1}

              ⅓ (R₁ + R) = R₁

              R = 3R₁ -R₁ = 2 R₁

              R = 2 500

              R = 1000 ohm

4 0
3 years ago
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