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KiRa [710]
3 years ago
11

How is a wavelength measured?

Physics
2 answers:
klasskru [66]3 years ago
6 0
Hey there,

Wavelength is measured from crest to crest so the correct answer will be A.

Hope I helped :)
kenny6666 [7]3 years ago
3 0
I believe the correct answer is A) From crest to crest.
~Silver
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Newton did not discover gravity, for early humans discovered that whenever they fell. what newton did discover is that gravity _
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What Newton discovered is that  gravity extends throughout the universe.

<h3>What is gravity?</h3>

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Humans have always known about gravity when they fall from a height and when they threw things up. However, human did not know that gravity extends throughout the universe.

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1 year ago
A submarine is stranded on the bottom of the ocean with its hatch 21.0 m below the surface. calculate the force (in n) needed to
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Answer:

28,400 N

Explanation:

Let's start by calculating the pressure that acts on the upper surface of the hatch. It is given by the sum of the atmospheric pressure and the pressure due to the columb of water, which is given by Stevin's law:

p_{top} = p_{atm} + \rho g h=1.013\cdot 10^5 Pa + (1000 kg/m^3)(9.8 m/s^2)(21.0 m)=3.071 \cdot 10^5 Pa

On the lower part of the hatch, there is a pressure equal to

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So, the net pressure acting on the hatch is

p=p_{top}-p_{bot}=3.071 \cdot 10^5 Pa - 1.013\cdot 10^5 Pa=2.058 \cdot 10^5 Pa

which acts from above.

The area of the hatch is given by:

A=\pi r^2 = \pi (\frac{0.420 m}{2})^2=0.138 m^2

So, the force needed to open the hatch from the inside is equal to the pressure multiplied by the area of the hatch:

F=pA=(2.058\cdot 10^5 Pa)(0.138 m^2)=28,400 N

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