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Naddik [55]
3 years ago
12

A water wave has a frequency of 2 HZ and a wavelength of 5 meters what is its speed

Physics
1 answer:
Sliva [168]3 years ago
8 0
Speed, v = fλ.

Where f is the frequency in Hertz, wavelength is in meters.

Speed, v = 2*5 = 10

Speed = 10 m/s. 
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An airplane starts from rest and accelerates at 10.8 m/s2 . what is its speed at the end of a 400 m long runway?
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The final speed of an airplane is v = 92.95 m/s

The rate of change of position of an object in any direction is known as speed i.e. in other word, Speed is measured as the ratio of distance to the time in which the distance was covered.

Solution-

Here given,

Acceleration a= 10.8 m/s2 .

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Then to find final speed of airplane v=?

Therefore from equation of motion can be written as,

v²=u²+ 2as

where, u is initial speed, v is final speed ,a is acceleration and s is displacement of the airplane. Therefore by putting the value of a & s in above equation and (u =0) i.e. the initial speed of airplane is zero.

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hence the final speed of airplane v =92.95m/s

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Wind tends to move from<br> pressure areas.<br> low, high<br> high, high<br> low, low<br> high, low
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Answer:

high, low

Explanation:

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So, the wind tends to move from high-pressure areas to low pressure.

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