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natulia [17]
3 years ago
13

Date

Physics
1 answer:
Sphinxa [80]3 years ago
6 0

Explanation:

Given: time= 3 minutes

Distance =18 km

Speed = distance / time

= 18/3

=6 km/min

(I don't know in what unit u want the answer)

Hope this helps and answers your question..

Good Luck

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If its wavelength were doubled, its energy would be If its wavelength were doubled, its energy would be 4E. 2E. 12E. 14E.
ANEK [815]

The wavelength was doubled, and its energy will be increased by 4 times.

looking at the formula

energy E = MC^2

also, c = \lambda \times \nu

hence it is clear from above that energy is directly proportional to the square of the wavelength.

hence, The wavelength was doubled, and its energy will be increased by 4 times.

<h3>What is Wavelength?</h3>
  • The distance over which a periodic wave's shape repeats is known as the wavelength in physics.
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All waves change speed when they enter a new medium, but they don't always bend. When does bending occur?
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6 0
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Please help if you have the time
Alex777 [14]

We know, length of segment wave is half the wavelength .

Let, wavelength of wave is \lambda.

So, length of segment will be \dfrac{\lambda}{2} .

Now, it is given that the string vibrates in four segments.

So,

L = 4\times \dfrac{\lambda}{2}\\\\L = 2\lambda\\\\\lambda = 1\ m

Speed can be given by :

speed = wavelength \times frequency\\\\speed = 1\times 120\  m/s\\\\speed = 120\ m/s

Therefore, the wave speed in the string is 120 m/s.

6 0
3 years ago
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