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Answer:
35.55 ohm
Explanation:
C = 80 micro farad
F = 56 hertz
Reactance
Xc = 1 / (2 × pi × F × C)
Xc = 1 / ( 2 × 3.14 × 56 × 80 × 10^-6)
Xc = 35.55 ohm
Time taken by the rubber-soled shoes to reduce a person's potential from 3.00×10³ V to 100V is 3.91s
The initial potential difference
is related to the final potential difference
by

Our target is to find t, so we rearrange equation (1) for t to be

The body has a capacitance 150 pF while the foot has a capacitance 80 pF and both are in parallel connection. So, the equivalent capacitance is

The shoes of the rubber-soled has resistance
. Plug the values for
and C into equation (2) to get the time t.

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Answer:
Here you go!
Explanation:
Gamma rays have the highest energy radiation and have the smallest wavelength in the electromagnetic spectrum. They are formed by the hottest and most energetic objects in the world, with nuclear explosions, lightning and far less radioactive decay activity producing gamma rays. It can be both useful and dangerous, gamma rays are used in medicine to treat cancer with radiation when exposed to them, radiology, sterilization and much more.
By definition, the refractive index is
n = c/v
where c = 3 x 10⁸ m/s, the speed of light in vacuum
v = the speed of light in the medium (the liquid).
The frequency of the light source is
f = (3 x 10⁸ m/s)/(495 x 10⁻⁹ m) = 6.0606 x 10¹⁴ Hz
Because the wavelength in the liquid is 434 nm = 434 x 10⁻⁹ m,
v = (6.0606 x 10¹⁴ 1/s)*(434 x 10⁻⁹ m) = 2.6303 x 10⁸ m/s
The refractive index is (3 x 10⁸)/(2.6303 x 10⁸) = 1.1406
Answer: a. 1.14