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Natasha2012 [34]
3 years ago
9

How many wavelenghts of a wave pass a point if the frequency of the wave is 4 hertz?

Physics
1 answer:
sasho [114]3 years ago
4 0
8. Hope this helps.....a little

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How can we change the frequency of the wave
olga nikolaevna [1]

Answer:

.Also we can change the frequency by decreasing wavelength , or increasing velocity

Explanation:

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2 years ago
Why can concave mirror is used in cosmetic mirror​
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3 years ago
Which phase of matter consists of particles that vibrate only?
bearhunter [10]

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4 0
4 years ago
A fire hose 5 centimeters in diameter is used to fill a 225-liter bucket. If it takes 15 seconds to fill the bucket, what is the
Vika [28.1K]
I believe you ask about speed at the end of the hose:

The volume of the bucket is 225 liters which is equal to 225 dm^{3}.
V=225dm^{3}
Hose's cross section can be counted with the typical circle's area formula (with diameter instead of radius, that's why you've got a fraction):
A=3,14*\frac{d^{2}}{4}}=0,19625dm^{2}

225dm^{3} are filled within 15 second.

As the bucket is being filled you can say that it's volume is the volume of the water that flowed out of the hose, then:
V=A*h
The speed of the water can be counted with equation:
v=\frac{h}{t}
After extracting h from the volume's equation you get:
v=\frac{V}{A*t}
When you count the fraction you get the answer:
v=76,43\frac{dm}{s}=0,7643\frac{m}{s}


4 0
3 years ago
In which part of the scientific method would you make a prediction?
max2010maxim [7]
<span>In which part of the scientific method would you make a prediction?

hypothesis



A statement that explains an observation and is supported by data is a

scientific theory



In which part of the scientific method would you record your observations?

experiment



A scientific statement that describes an observation but does not explain the observation is

a scientific law

</span>
4 0
3 years ago
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