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topjm [15]
3 years ago
7

A certain water wave has a wavelength of 25 m and a frequency of 4.0 Hz. What is its velocity?

Physics
1 answer:
babymother [125]3 years ago
8 0
Wave speed = frequency * wavelength
Wave speed = 4 * 25
Wave speed = 100 m/s
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a

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2 years ago
A wheel of diameter 30.0 cm starts from rest and rotates with a constant angular acceleration of 3.50 rad/s2 . At the instant th
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3 years ago
on aircraft carriers, catapults are used to accelerate jet air craft to flight speeds in a short distance. One such catapult tak
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Acceleration = (change in speed) / (time for the change)

Change in speed = (speed at the end) - (speed at the beginning)

The jet's change in speed = (70 m/s) - (zero) = 70 m/s

So acceleration = (70 m/s) / (2.5 s)

Acceleration = (70 / 2.5) m/s²

<em>Acceleration = 28 m/s²</em>  

That's about 2.9 G's .  Jet pilots can endure a lot more than that, but maybe the catapult or the hook on the airplane can't.  Let's look a little closer:

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The force on the airplane = (18,000 kg) x (28 m/s²)

Force on the airplane = 504,000 Newtons

That's about 113,000 pounds !  Maybe the part of the airplane that the catapult pushes on can't handle any more force than that.  Or maybe that's the most force the catapult can deliver.

Also, the REACTION force on the catapult is the same 113,000 pounds.  Maybe the hooks or the chains or the struts on the catapult can't handle any more force than that.

That's almost 57 tons for gosh sakes !  Maybe the DECK of the carrier can't handle more force than that, and that's why they can't launch the airplane with acceleration of more than 2.9 G's .

8 0
3 years ago
when a cup of hot chocolate cools from 90c to 80c which of the following is happening to the molecules of the liquid
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I think that the liquids molecules are slowing down. Hope this helps!

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Please vote me Brainliest

7 0
3 years ago
An astronaut on a strange planet finds that she can jump a maximum horizontal distance of 14.0 m if her initial speed is 2.20 m/
pochemuha

We have the equation of motion

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In this case initial velocity = 2.20 m/s, final velocity = 0 m/s, displacement = 14 m

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On solving we can find the acceleration value as -0.173m/s^2

So free fall acceleration = 0.173m/s^2

                                             


3 0
3 years ago
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