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3 years ago

What type of mechanical wave needs a medium?

1 answer:

5 0

Compressional!

Waves traveling through a solid medium can be either transverse waves or longitudinal waves. Yet waves traveling through the bulk of a fluid (such as a liquid or a gas) are always longitudinal waves. Transverse waves require a relatively rigid medium in order to transmit their energy.

Longitudinal ~ Compressional

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Which are uses of fiber optics? Check all that apply.

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4 years ago

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At time t=0 a proton is a distance of 0.360 m from a very large insulating sheet of charge and is moving parallel to the sheet w

Yuki888 [10]

Explanation:

Formula for the electric field due to the infinite sheet of charge is as follows.

E = $\frac{\sigma}{2 \epsilon_{o}}$

where, $\sigma$ = surface charge density

Now, formula for electric force acting on the proton is as follows.

F = eE

where, e = charge of the proton

According to the Newton's second law of motion, the net force acting on the proton is as follows.

F = ma

a = $\frac{eE}{m}$

= $\frac{e(\frac{\sigma}{2 \epsilon_{o}})}{m}$

= $\frac{e \sigma}{2m \epsilon_{o}}$

According to the kinematic equation, speed of the proton in perpendicular direction is as follows.

$v_{f} = v_{i} + at$

= $(0 m/s) + \frac{e \sigma}{2 m \epsilon_{o}}t$

= $\frac{1.6 \times 10^{-19}C \times 2.34 \times 10^{-9} C/m^{2} \times 5.40 \times 10^{-8}s}{2 \times (1.67 \times 10^{-27} kg)(8.85 \times 10^{-12} C^{2}/Nm^{2}}$

= 683.974 m/s

Hence, total speed of the proton is as follows.

v' = $\sqrt{(960 m/s)^{2} + (683.974 m/s)^{2}}$

= $\sqrt{921600 + 467820.43}$

= $\sqrt{1389420.43}$

= 1178.73 m/s

Therefore, we can conclude that speed of the proton is 1178.73 m/s.

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3 years ago