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vodka [1.7K]
3 years ago
8

AM radio frequencies range between 550 kHz (kilohertz) and 1600 kHz and travel at the same speed, 3.0 x 108 m/s. What is the wav

elengths of the 1600 kHz frequency?
Physics
2 answers:
LenaWriter [7]3 years ago
4 0

Answer:187500m

Explanation:

frequency=1600kHz

Velocity=3x10^8 m/s

Wavelength=velocity ➗ frequency

Wavelength=(3x10^8) ➗ 1600

Wavelength=187500m

Alik [6]3 years ago
4 0
Ohhhhhhhhhhhhhhhhhhhhhhh
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A length of copper wire carries a current of 14 A, uniformly distributed through its cross section. The wire diameter is 2.5 mm,
gavmur [86]

Answer:

a. ρ_\beta=1.996J/m^3

b. U_E=9.445x10^{-15} J/m^3

Explanation:

a. To find the density of magnetic field given use the gauss law and the equation:

i=14A, d=2.5mm, R=3.3Ω, l=1 km, E_o=8.85x10^{-12}F/m, u_o=4*x10^{-7}H/m

ρ_\beta=\frac{\beta^2}{2*u_o}

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b. The electric field can be find using the equation:

U_E=\frac{1}{2}*E_o*E^2

E=(\frac{i*R}{l})^2

U_E=\frac{1}{2}*8.85x10^{-12}*(\frac{14A*3.3}{1000m})^2

U_E=9.445x10^{-15} J/m^3

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Answer:

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