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3 years ago

Light travels as a(n) _______ wave. mechanical compression electromagnetic

Physics

2 answers:

Alex787 [66]3 years ago

8 0

Answer: The correct answer is "electromagnetic wave".

Explanation:

Electromagnetic waves: These waves are produced by vibration of the charged particles. But the mechanical waves are caused by wave amplitude.

Electromagnetic wave does not need a medium while the mechanical wave needs a medium to travel.

The electromagnetic wave travels with the speed of the light. The example of electromagnetic wave is light.

Mechanical waves are of two types: Longitudinal wave and Transverse.

Sound wave is a longitudinal wave. It consists of compression and rarefaction.

Therefore, Light travels as an electromagnetic wave.

Ugo [173]3 years ago

4 0

The correct answer is electromagnetic. Lights travel as an electromagnetic wave. In fact, light is an electromagnetic radiation which has a center of the electromagnetic spectrum. Light is visible to the naked eye, and is responsible for an organism's sense of sight.

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3 years ago

A brave child decides to grab onto an already spinning merry‑go‑round. The child is initially at rest and has a mass of 25.5 kg.

Svetllana [295]

Answer:

72.75 kg m^2

Explanation:

initial angular velocity, ω = 35 rpm

final angular velocity, ω' = 19 rpm

mass of child, m = 15.5 kg

distance from the centre, d = 1.55 m

Let the moment of inertia of the merry go round is I.

Use the concept of conservation of angular momentum

I ω = I' ω'

where I' be the moment of inertia of merry go round and child

I x 35 = ( I + md^2) ω'

I x 35 = ( I + 25.5 x 1.55 x 1.55) x 19

35 I = 19 I + 1164

16 I = 1164

I = 72.75 kg m^2

Thus, the moment of inertia of the merry go round is 72.75 kg m^2.

5 0

3 years ago

What is the magnetic field strength at point 1 in the figure? (figure 1)

Lana71 [14]

The magnetic field strength at point 1 in the figure will be 6.67 ×10⁻⁵ T.

<h3>What is magnetic field strength?</h3>

The number of magnetic flux lines on a unit area passing perpendicular to the given line direction is known as induced magnetic field strength .it is denoted by B.

The magnetic field strength is found as;

$B = \frac{\mu_0I}{2r} \\\\ \mu_0 = 4 \PI \times 10^{-7}$

In the formula,I denote current, and r denotes the distance between the point and the current carrying wire and magnetic field due to current in the bottom wire.

At point 1, the net magnetic field is found as the sum of magnetic field due to current in the top wire.

$\rm B_{net} = B1_+(-B_2)$

$B = \frac{ 4 \PI \times 10^{-7}I}{2r} \\\\ \rm B_{net} = B_1_+(-B_2)\\\\ \rm B_{net} = \frac{4 \times \pi \times 10^{-7} \times 10}{2 \times \pi \times 0.02} -\frac{4 \times \pi \times 10^{-7} \times 10 }{2 \times \pi \times 0.06} \\\\\ \rm B_{net} = 6.67 \times 10^{-5} T$

Hence, the magnetic field strength at point 1 in the figure will be 6.67 ×10⁻⁵ T.

To learn more about the strength of induced magnetic field, refer:

brainly.com/question/2248956

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6 0

2 years ago