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devlian [24]
3 years ago
5

What is the name of the upward force that enables a bird to fly?

Physics
1 answer:
blagie [28]3 years ago
4 0
What is the name of the upward force that enables a bird to fly?
A. Lift
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Estimate the peak wavelength for radiation from ice at 273 k.
Andrews [41]
<h2>Answer: 10615 nm</h2>

Explanation:

This problem can be solved by the Wien's displacement law, which relates the wavelength  \lambda_{p} where the intensity of the radiation is maximum (also called peak wavelength) with the temperature T of the black body.

In other words:

<em>There is an inverse relationship between the wavelength at which the emission peak of a blackbody occurs and its temperature.</em>

Being this expresed as:

\lambda_{p}.T=C    (1)

Where:

T is in Kelvin (K)

\lambda_{p} is the <u>wavelength of the emission peak</u> in meters (m).

C is the <u>Wien constant</u>, whose value is 2.898(10)^{-3}m.K

From this we can deduce that the higher the black body temperature, the shorter the maximum wavelength of emission will be.

Now, let's apply equation (1), finding \lambda_{p}:

\lambda_{p}=\frac{C}{T}   (2)

\lambda_{p}=\frac{2.898(10)^{-3}m.K}{273K}  

Finally:

\lambda_{p}=10615(10)^{-9}m=10615nm  This is the peak wavelength for radiation from ice at 273 K, and corresponds to the<u> infrared.</u>

8 0
3 years ago
A particle has charge -1.95 nC. (a) Find the magnitude and direction of the electric field due to this particle at a point 0.225
11Alexandr11 [23.1K]

Answer:

a)

346.67 N/C, downward

b)

1.3 m

Explanation:

(a)

q = magnitude of charge on the particle = 1.95 x 10⁻⁹ C

r = distance of location from the charged particle = 0.225 m

E = magnitude of electric field at the location

Magnitude of electric field at the location is given as

E = \frac{kq}{r^{2}}

Inserting the values

E = \frac{(9\times 10^{9})(1.95 \times 10^{-9})}{(0.225)^{2}}

E = 346.67 N/C

a negative charge produce electric field towards itself.

Direction :  downward

(b)

E = magnitude of electric field at the location = 10.5 N/C

r = distance of location from the charged particle = ?

q = magnitude of charge on the particle = 1.95 x 10⁻⁹ C

Magnitude of electric field at the location is given as

E = \frac{kq}{r^{2}}

Inserting the values

10.5 = \frac{(9\times 10^{9})(1.95 \times 10^{-9})}{r^{2}}

r = 1.3 m

5 0
3 years ago
Please help quick please
Ede4ka [16]
I can’t see the picture what do you need help with
3 0
2 years ago
PLEASE HELP I AM SO STUMPED ABOUT THIS QUESTION PLEASE HELP
Flauer [41]
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3 0
3 years ago
Read 2 more answers
When you stand on tiptoes on a bathroom scale, there is an increase in
pychu [463]

Answer:

B) Pressure on the scale, not registered as weight.

Explanation:

This is because energy (derived from weight) becomes compiled on the tips of your toes, and therefore does not increase your weight, but simply the pressure at a smaller point

3 0
3 years ago
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