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Black_prince [1.1K]
4 years ago
8

7. The According to Wien’s Law (λmax = 3×106/T), what is the temperature of the radiation? Recall that to use this formula, the

wavelength must be in nanometers (1nm = 10−9 m) and the temperature will be in Kelvin.
Physics
1 answer:
Olin [163]4 years ago
3 0

Answer:

According to Wien’s Law:

\lambda_{peak} = \frac{2.9 \times 10^{6} }{T(K)}

where;

\lambda_{peak} is the wavelength

T(K) is the temperature in Kelvin

Putting the values given in the above equation:

{T(K)} = \frac{2.9 \times 10^{6} }{\lambda_{peak}}

{T(K)} = \frac{2.9 \times 10^{6} }{3 \times 10^{3}}}

<u><em>T(K) = 0.966×10^{3}</em></u>

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Slav-nsk [51]

Answer:

563.86 N

Explanation:

We know the buoyant force F = weight of air displaced by the balloon.

F = ρgV where ρ = density of air = 1.29 kg/m³, g = acceleration due to gravity = 9.8 m/s² and V = volume of balloon = 4πr/3 (since it is a sphere) where r = radius of balloon = 2.20 m

So, F = ρgV = ρg4πr³/3

substituting the values of the variables into the equation, we have

F =  1.29 kg/m³ × 9.8 m/s² × 4π × (2.20 m)³/3

= 1691.58 N/3

= 563.86 N

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3 years ago
After the NEAR spacecraft passed Mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's moment
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4 years ago
A paint brush is dropped from the top of a tall ladder and free falls to the ground. What changes, if any, would be observed of
muminat

Answer:

Explanation:

As the paint brush is dropped from the top of a tall ladder it started free falling

i.e. velocity of brush increases as it falls down due to the acceleration provided by gravity.

We know acceleration due to gravity is the attraction experienced by the object due to earth attraction

Value of acceleration due to gravity is constant i.e. 9.8\ m/s^2

Therefore the correct choice is

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4 years ago
Which of the following is NOT a force that influences the wind? A. coriolis effect B. magnetic field C. pressure gradient D. fri
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A magnetic field does not have any influence on wind. The Coriolis effect, pressure gradient, and friction do affect wind.

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7 0
4 years ago
Read 2 more answers
Hello,
ZanzabumX [31]

the calculated frequency is 932 Hz.

Even for sensors positioned at significant track offsets, the computation method integrates three different speed calculation techniques to produce estimates for arbitrary train speeds. The second technique is comparable, but it combines a running rms with a previously created "dominant frequency method." The third technique calculates train speed using regression analysis and an analytical vibration frequency prediction model.

given-

train is travelling at a constant speed. f=(π v/L)

The actual frequency of the note emitted by the train.

By applying Doppler effect,

n'=n( v + vs/ v-vs )

=200( 340+220 / 340-220 )

=200( 560/120)

=932 Hz

Learn more about frequency here-

brainly.com/question/5102661

#SPJ9

8 0
1 year ago
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