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3 years ago

A wave with a period of three seconds travels at a speed of 12 m/s what is the wavelength of the wave

Physics

1 answer:

harkovskaia [24]3 years ago

8 0

Answer:

λ = 0.28m

Explanation:

Equation used is v = λf, where v is velocity, λ is wavelength, and f is frequency

We need to find wavelength so rearrange the equation in term of wavelength.

v = λf

λ = f/v

We know that period is the inverse of frequency (f = 1/T), so lets substitute that into our equation

λ = f/v

λ = (1/T)/v

Plug in your the given values given in the question.

We're given v=12m/s and T=3sec

λ = (1/T)/v

λ = (1/3)/12

λ = 1/36 = 0.2777777 = 0.28m

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Answer:

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4 years ago

Why does the sky appears blue?

SashulF [63]

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4 years ago

For a wavelength of 420 nm, a diffraction grating produces a bright fringe at an angle of 24°. For an unknown wavelength, the sa

Inessa [10]

Answer:

649.8420 nm

Explanation:

We have given $\Theta _1=24^{\circ} \ and\ \Theta _2=39^{\circ}$

$\lambda _1=420\ nm$ we have to find unknown wavelength that is $\lambda _2$

The condition for constructive interference is $dsin\Theta =n\lambda$

Where d is distance between slits $\Theta$ is angle of emergence and n is order of maxima

Using constructive interference equation

$dsin\Theta _1=n\lambda _1$ ---------eqn 1

$dsin\Theta _2=n\lambda _2$ ---------eqn 2

On dividing eqn 1 by eqn 2

$\frac{\lambda _1}{\lambda _2}=\frac{sin\Theta _1}{sin\Theta _2}$

$\frac{420}{\lambda _2}=\frac{sin24^{\circ}}{sin39^{\circ}}$

$\lambda _2=649.8420\ nm$

7 0

3 years ago

A bowling ball of mass 8 kg hits a wall going 5 m/s and rebounds at a speed of 4 m/s. What was the impulse applied to the bowlin

monitta

Yo, sorry I just resized I am so dumb.

The Answer would be C.

Becuase the wall is pushing off 9 becuase it took 5 and bounced back off 4 so

9 times 8= 72 kg m/s

Sorry about that ):

7 0

3 years ago

Read 2 more answers

The mass of an atom is ________________________.

andreyandreev [35.5K]

I'd say d.) Concentrated in the nucleus.

This is because Nucleus consists of protons and neutrons; contributing to some mass, whereas Electron's mass is almost negligible ( 9.1 x 10^-31 kg)

Hope this answers your question!

8 0

3 years ago