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Irina18 [472]
3 years ago
15

Use the following formula to answer the following statement. Round to the nearest tenth.

Physics
1 answer:
just olya [345]3 years ago
3 0
I need help my self lol XD
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Given light with frequencies of: 5.5 x 1014 Hz, 7 x 1014 Hz and 8 x 1014 Hz, calculate the wavelengths in free space. What color
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Answer:

Explanation:

Given light with frequencies of  5.5 x 10¹⁴ Hz, 7 x  10¹⁴ Hz and 8 x  10¹⁴ Hz

we now, \lambda = \dfrac{c}{\nu}

now

1)   \lambda_1 =\dfrac{3\times 10^8}{5.5\times 10^{14}}

                      = 545.45 nm

2)   \lambda_2 = \dfrac{3\times 10^8}{7\times 10^{14}}

                      = 428.57 nm

3)   \lambda_3 = \dfrac{3\times 10^8}{8\times 10^{14}}

                      =  375 nm

the color related to wavelength are

545.45 nm - green

428.57 nm - blue

375 nm - violet

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3 years ago
A transmission system at a radio station uses a/an _______ to convert a direct current into a highfrequency alternating current.
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A transmission system at a radio station uses an oscillator to convert a direct current into a high frequency alternating current.
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3 years ago
In an atomic model that includes a nucleus, negative charge is
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D). located out side the nucleus
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(a) Calculate the absolute pressure at the bottom of a freshwater lake at a point whose depth is 30.0 m. Assume the density of t
Law Incorporation [45]

Answer:

(a) The absolute pressure at the bottom of the freshwater lake is 395.3 kPa

(b) The force exerted by the water on the window is 36101.5 N

Explanation:

(a)

The absolute pressure is given by the formula

P = P_{o} + \rho gh

Where P is the absolute pressure

P_{o} is the atmospheric pressure

\rho is the density

g is the acceleration due to gravity (Take g = 9.8 m/s^{2} )

h is the height

From the question

h = 30.0 m

\rho = 1.00 × 10³ kg/m³ = 1000 kg/m³

P_{o} = 101.3 kPa = 101300 Pa

Using the formula

P = P_{o} + \rho gh

P = 101300 + (1000×9.8×30.0)

P = 101300 + 294000

P =395300 Pa

P = 395.3 kPa

Hence, the absolute pressure at the bottom of the freshwater lake is 395.3 kPa

(b)

For the force exerted

From

P = F/A

Where P is the pressure

F is the force

and A is the area

Then, F = P × A

Here, The area will be area of the window of the underwater vehicle.

Diameter of the circular window = 34.1 cm = 0.341 m

From Area = πD²/4

Then, A = π×(0.341)²/4 = 0.0913269 m²

Now,

From F = P × A

F = 395300 × 0.0913269

F = 36101.5 N

Hence, the force exerted by the water on the window is 36101.5 N

5 0
3 years ago
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