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sveta [45]
2 years ago
7

A sound wave has a frequency of 265 hz and a wavelength measured at 1.3

Physics
1 answer:
pochemuha2 years ago
8 0

Answer:

V = f λ     speed of wave in terms of frequency and wavelength

t = S / V      time for wave to travel a distance S

t = 91.4 m / 344.5 m/s = .265 sec        time to travel 91.4 m

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A ball is thrown vertically upwards with a velocity v and an initial kinetic energy Ek. When half way to the top of its flight,
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Answer:

Option A

\frac{V}{\sqrt{2} } ,\frac{E}{2}

Explanation:

When the ball its thrown up, at half way of its flight it means half of its vertical height which is \frac{h}{2}.  

potential energy = mgh

since it moved half way of height

P.E = \frac{mgh}{2}

This means for the body to have gained half of its P.E, it will loose half of its kinetic energy.

Final kinetic energy(E_{1}) = E/2

kinetic energy = \frac{1}{2}mv^{2}

let the final velocity at halfway flight be v1

E_{1} = E/2

\frac{1}{2}mv_{1}^{2} =\frac{\frac{1}{2}mv^{2}}{2}

cross multiply we have

mv_{1}^{2} =\frac{1}{2}mv^{2}

cancel m from both sides

v_{1}^{2} = \frac{1}{2}v^{2}

take the square root of both sides,

v_{1} =\sqrt{\frac{v^{2} }{2} }

v_{1} =\frac{v}{\sqrt{2} }

Thus our final velocities will be E/2 and \frac{v}{\sqrt{2} }

5 0
3 years ago
A monkey pushes a rock horizontally on a frictionless table with a net force of 10 N for 2.0 m. How much kinetic energy does the
Dmitrij [34]

Answer:

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Explanation:

8 0
3 years ago
In order to decrease the required centripetal acceleration for a car driving around a turn, the driver could
musickatia [10]

Answer:

Release the pressure on the gas peddle

Explanation:

If you turn around to fast you cant make a tighter turn around but if its slow you can turn around tighter.

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An increase in temperature will ___________ the speed of a sound wave?
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I think it’s cause no change i think
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What is the information gathered in a scientific investigation called
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3 years ago
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