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3 years ago

Ocean waves with a wavelength of 12.9 m are

Physics

1 answer:

sergejj [24]3 years ago

4 0

Answer:

Speed, v = 2.96 m/s

Explanation:

We have,

Wavelength of ocean wave is 12.9 m

Frequency of wave is 0.23 Hz

It is required to find the speed of ocean wave. The speed of any wave in term of wavelength and frequency is equal to their product. So,

$v=f\lambda\\\\v=0.23\times 12.9\\\\v=2.96\ m/s$

So, the speed of wave is 2.96 m/s

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Except for the nodes on a standing wave, what is the frequency f of the points executing simple harmonic motion?

Katen [24]

Take into account that in a standing wave, the frequency f of the points executing simple harmonic motion, is simply a multiple of the fundamental harmonic fo, that is:

f = n·fo

where n is an integer and fo is the first harmonic or fundamental.

fo is given by the length L of a string, in the following way:

fo = v/λ = v/(L/2) = 2v/L

becasue in the fundamental harmonic, the length of th string coincides with one hal of the wavelength of the wave.

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1 year ago

4. What determines which goods a country should produce and export?

tangare [24]

Answer:

net exporter

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2 years ago

Two trains A and B of length 400 m each are moving on two parallel tracks with

Vinvika [58]

Answer:

The initial distance between the trains is 1450 m. 

Explanation:

In the question two trains are of equal length 400 m and moves at a uniform speed of 72 km/h. train A is moving ahead of train B. If the train B has to overtake train A it should accelerate.

Train B’s acceleration is $1m/s^2$ and it accelerated for 50 seconds.

 $a=1 m/s^2$ 

t=50 s 

initial speed u=72km/h 

we have to convert this speed into m/s 

 $u=72 \times 5/18=20 m/s$ 

Distance covered in accelerating phase $S=ut+1/2 at^2$ 

 $=20 \times 50+1/2 \times 1 \times 50^2$ 

 $=1000+1250=2250 m$ 

If a train is just behind another, the distance covered by the train located behind during overtaking phase will be equal to the sum of the lengths of the trains.

Here length of train A+length of train $B=400+400=800 m$ 

Hence the initial distance between the trains = $2250-800=1450 m$ 

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2 years ago

A 34.00 kg sample of mud has a specific heat of 2,512 J/kg °C.

Elena-2011 [213]

Answer:

B ig lol

Explanation:

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3 years ago

a girl performed 50j of work lifting a heavy box it took her 5 seconds to lift the box what is her power

son4ous [18]

Answer:

10 W

Explanation:

Power is work over time.

P = W / t

P = 50 J / 5 s

P = 10 W

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2 years ago