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3 years ago

Describe the electromagnetic spectrum, electromagnetic waves, and give two examples of different types of electromagnetic waves.

Physics

1 answer:

klasskru [66]3 years ago

6 0

Answer:

See Explanation below.

Explanation:

The electromagnetic spectrum is a range of frequencies spanning a very wide range. Scientists talk about frequencies from about 3 cycles per second to those at least to 10^25 cycles per second. The name for cycles per second is known at Hertz abbreviated to Hz.

Within this spectrum or range exist some of the frequencies we are talk about such as X-Rays, visible light, and wireless transmission including radio waves. However, the range goes beyond what is commonly used at this time both above and below the range.

One example of a portion of electromagnetic spectrum that is very important is the range that is visible to the human eye. This part of the spectrum, with wavelengths in the micrometer range through a few hundred nanometer wavelength range, is known as visible light. The ability to see and use the sense of eye-sight is dependent on this portion of the electromagnetic spectrum.

Another example of the electromagnetic spectrum that is well known has to do with radio waves. This part if from about 3 MHz up to about 300 GHz. Within this portion of the electromagnetic spectrum are radio and television transmissions and receptions. Also wireless phones, wireless Internet, and satellite transmission and reception are included in this portion of the electromagnetic spectrum.

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Goryan [66]

Bro the picture is too dark I can’t see do it again so I can help you

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3 years ago

A 4.3 kg steel ball and 6.5 m cord of negligible mass make up a simple pendulum that can pivot without friction about the point

Alekssandra [29.7K]

Answer

given,

mass of steel ball, M = 4.3 kg

length of the chord, L = 6.5 m

mass of the block, m = 4.3 Kg

coefficient of friction, μ = 0.9

acceleration due to gravity, g = 9.81 m/s²

here the potential energy of the bob is converted into kinetic energy

$m g L = \dfrac{1}{2} mv^2$

$v= \sqrt{2gL}$

$v= \sqrt{2\times 9.8\times 6.5}$

v = 11.29 m/s

As the collision is elastic the velocity of the block is same as that of bob.

now,

work done by the friction force = kinetic energy of the block

$f . d = \dfrac{1}{2} mv^2$

$\mu m g. d = \dfrac{1}{2} mv^2$

$d=\dfrac{v^2}{2\mu g}$

$d=\dfrac{11.29^2}{2\times 0.9 \times 9.8}$

d = 7.23 m

the distance traveled by the block will be equal to 7.23 m.

8 0

3 years ago

Determine the maximum theoretical speed that may be achieved over a distance of 66 m by a car starting from rest, knowing that t

My name is Ann [436]

Answer:

v=32.49 m/s

Explanation:

Given that

Distance ,d= 66 m

Initial speed of the car ,u = 0 m/s

Coefficient of friction ,μ = 0.8

Lets take the total mass of the car = m

The acceleration of the car is given as

a = μ g ( g= 10 m/s² )

Now by putting the values in the above equation we get

a= 0.8 x 10 m/s²

a= 8 m/s²

We know that ,final speed is given as

v²= u ²+ 2 a d

Now putting the value

v²=0² + 2 x 8 x 66

v²= 1056

v=32.49 m/s

3 0

3 years ago

State the law of conservation of machine

laiz [17]

Answer:

law of conservation of energy is that a perpetual motion machine of the first kind cannot exist, that is to say, no system without an external energy supply can deliver an unlimited amount of energy to its surroundings

Explanation:

Hope it helps.

Mark me as Brainliest plz!

3 0

3 years ago

In a double-slit interference experiment you are asked to use laser light of different wavelengths and determine the separation

MAXImum [283]

Answer:

Red light

Explanation:

This because All interference or diffraction patterns depend upon the wavelength of the light (or whatever wave) involved. Red light has the longest wavelength (about 700 nm)

3 0

3 years ago