3 years ago

What is the displacement of a person walking 20 m North, and then walks 20 meters South. *

Physics

1 answer:

Anuta_ua [19.1K]3 years ago

3 0

0,0 if you’re looking for plot .

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A wave is represented by the equation y = 0.20 sin [ 0.4π (x – 60t)], where x and y are in cm and t is in s. The velocity of the

Leya [2.2K]

Answer:

v = 60 m/s

Explanation:

It is given that,

A wave is represented by the equation :

$y=0.2\sin [0.4\pi (x-60)t]$

We need to find the velocity of the wave

The general equation of a wave is given by :

$y=A\sin (kx-\omega t)$ ....(1)

Equation (1) can be written as :

$y=0.2\sin (0.4\pi x-24\pi t)$ ...(2)

If we compare equation (1) and (2) we get :

$k=0.4\pi$

$\omega=24\pi$

The velocity of a wave is given by :

$v=\dfrac{\omega}{k}\\\\v=\dfrac{24\pi}{0.4\pi}\\\\v=60\ m/s$

So, the velocity of the wave is 60 m/s.

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3 years ago

Children are ready for more complex storybooks:

FromTheMoon [43]

Answer:

Explanation:

Because that is when they're mind learns how to read

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3 years ago

What units are used to express energy?

marysya [2.9K]

Joules
Watts
Kilocalories
BTU
Electron volt

I can't remember any others. Hope that's enough : )

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4 years ago

An auto race takes place on a circular track. A car completes one lap in a time of 25.0 s, with an average tangential speed of 5

ludmilkaskok [199]

Answer:

(a) Angular speed will be 0.2512 rad/sec

(b) Radius will be 213.375 m

Explanation:

We have given time to complete 1 lap = 25 sec

We know that 1 lap = $2\pi$ radian

(a) So angular speed $=\frac{2\pi }{25}=\frac{2\times 3.14}{25}=0.2512rad/sec$

(B) Tangential velocity is given as v = 53.6 m/sec

We know that tangential velocity is given by

$v=\omega r$

So radius $r=\frac{v}{\omega }=\frac{53.6}{0.2512}=213.375m$

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3 years ago

An electron in the first energy level of the electron cloud has an electron in the third energy level

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Answer:

a lower energy than

Explanation:

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4 years ago

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