3 years ago

What will change the velocity of a periodic wave?

1 answer:

7 0

If it's a mechanical wave, then its speed depends on the physical characteristics of the medium.

If it's an electromagnetic wave, then its speed depends on the
electrical characteristics of the medium.

Either way, the properties of the medium determine the wave speed.
You want to change the speed ? You have to change the properties
of the medium.

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Which of the following is not an air pollutant?

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Answer: 1. Carbon dioxide is not an air pollutant

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4 years ago

A force of 100N is creating 20Pa of pressure on a surface. Calculate the area of the surface.

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Answer:

A = 5 m²

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A 11 547,83-N car is raised using a hydraulic lift, which

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Answer:

75457.54816 N

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$F_1$ = Initial force

$F_2$ = Weight of car = 11547.83 N

$r_1$ = Smaller radius = 5 cm

$r_2$ = Larger radius = 19.56 cm

From Pascal's law we have

$\dfrac{F_1}{A_1}=\dfrac{F_2}{A_2}\\\Rightarrow F_1=F_2\dfrac{A_1}{A_2}\\\Rightarrow F_1=11547.83\dfrac{\pi r_1^2}{\pi r_2^2}\\\Rightarrow F_1=11547.83\dfrac{5^2}{19.56^2}\\\Rightarrow F_1=754.57548\ N$

The force is 754.57548 N

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