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3 years ago

6) Why do electromagnetic waves not require a medium for travel?

1 answer:

8 0

Electromagnetic waves are a type of
transverse wave. This wave does not
require media for travel. As the name
implies a wave, these waves indicate
electrical and magnetic properties. No
cost whatsoever happened to the wave. Electromagnetic waves work with the
laws of reflection and refraction. They
travel the straight line in a vacuum at a
speed of 3 x 108 ms-1. The intensity of
electromagnetic waves depends on the
strength of the electric field.

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Let us be two cylindrical conductors connected in parallel, to which a potential difference of V = 170V is applied. The two cond

PSYCHO15rus [73]

The equivalent resistance of the two cylindrical conductors connected in parallel is 466 ohm.

<h3>Resistance</h3>

Resistance is a measure of the opposition to flow of electric current. It is measured in ohms.

It is given by the formula:

$R=\rho\frac{l}{A} \\\\where\ l=length,A=area,\rho=resistivity$

Given that R₂ = 469 ohm, hence:

$R_2=\rho\frac{l_2}{A_2} \\\\469=\rho\frac{l_2}{\pi r_2^2}$

But l₁ = 6l₂, r₁ = (1/5)r₂, hence:

$R_1=\rho \frac{l_1}{A_1}=\rho *\frac{6l_2}{[\pi (1/5)r_2]^2} =150 * \rho \frac{l_2}{[\pi r_2]^2}=30*469=70350\ ohm$

The equivalent resistance (R) is:

$R=\frac{R_1R_2}{R_1+R_1}=\frac{469*70350}{469+70350} =466\ ohm$

The equivalent resistance of the two cylindrical conductors connected in parallel is 466 ohm.

Find out more on resistance at: brainly.com/question/17563681

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2 years ago

The brakes in a car increase in temperature by ΔT when bringing the car to rest from a speed v. How much greater would ΔT be if

Wewaii [24]

Answer:

T would be two times the temperature That it was before the double so if the initial temperature was 20 it would now be 40

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3 years ago

A person jumps from the roof of a house 3.1-m high. When he strikes the ground below, he bends his knees so that his torso decel

Sveta_85 [38]

Part A

Free fall motion
h = 3.1 m

Equation: Vf = √(2gh) = √(2*9.8 m/s^2 * 3.1 m) = 7.8 m/s

That is the only part in the question.

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3 years ago

What was Thomas Edison first major invented?

marysya [2.9K]

Answer:

Thomas Edisons most famous invention was the phonograph

Thomas Edison announces his invention of the phonograph, a way to record and play back sound. Edison stumbled on one of his great inventions—the phonograph—while working on a way to record telephone communication at his laboratory in Menlo Park, New Jersey.

Explanation:

Hope I helped

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3 years ago

A student constructed a series circuit consisting of a 12.0-volt battery, a 10.0-ohm lamp, and a

Stels [109]

The power dissipated across a component can be calculated through the formula P=I^2xR

Substituting the values in we get P=(0.5)^2x10=2.5W

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3 years ago