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3 years ago

8

A wave is traveling at a speed of 18 m/s with a frequency of 3 Hz. A second wave is traveling at a speed of 16 m/s with a freque

ncy of 4 Hz. What is the difference between these two wavelengths?worked out

1 answer:

Alik [6]3 years ago

8 0

Answer:

2Hz

Explanation:

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Bernice draws an oxygen atom. She draws a small circle for the nucleus. Inside of the circle, she draws plus signs for protons a

Lelu [443]

Answer

It should be A and C

Explanation:

because oxygen is number 8 in the periodic table of elements and has a atomic weight of 15.999 you use those numbers to figure out what is true between those.

The 8 for oxygen goes for the number of electrons and proton and to find neutrons u round the 15.999 up which now make it 16 and subtract it by the 8 now you have 8 protons, 8 neutrons, and 8 electrons

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2 years ago

The velocity of a car doubles over a short period of time. Which additional information is sufficient to determine the amount of

Rom4ik [11]

Answer:

Time and velocity

Explanation:

The time taken for the velocity to double is very important to find the amount of acceleration the car acquires.

Acceleration is the rate of change of velocity with time.

Acceleration = $\frac{v -u}{t}$

v is the initial velocity

u is the final velocity

t is the time taken

So, the velocity and time is needed to calculate the value of the acceleration the car undergoes.

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3 years ago

Power is the time rate of change of work. <br> a. True<br> b. False

Bumek [7]

The statement about "<span>Power is the time rate of change of work" is true. The answer is letter A. Power is presented by the equation P = Wt where P is the power, W is work and t is time.</span>

6 0

3 years ago

An ambulance is rapidly approaching you at a stop light. What happens to the frequency and pitch of the sound as the ambulance d

vagabundo [1.1K]

Answer:

A )

Explanation:

This change in frequency observation occur due to doppler effect

if the wave source moves,In the time between one wave peak being emitted and the next, the source will have moved so that the shells will no longer be concentric. The wavefronts will get closer together in front of the source as it travels and will be further apart behind it. (see the graph)

when the person standing still in front of the ambulance, he will observe a <em>higher frequency </em>than before as the source travels towards them.

$f_(observed)=\frac{V_(wave)}{V_(wave)-V_(source)} *f_(original)$

The pitch we hear depends on the frequency of the sound wave.

A high frequency corresponds to a high pitch

as we hear a higher frequency , it makes the <em>pitch higher</em> too

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3 years ago

Read 2 more answers

Each part and area of the ear have specific functions in the hearing process. In which of the following parts of the ear are sou

V125BC [204]

There are no "following" parts of the ear listed.

Sound waves are changed into a signal the brain can understand, consisting of nerve impulses, in the "hair cells" in the lining of the cochlea ... that spiral thing deep in the inner ear.

(In fact, that's as deep as you can get in the inner ear, because it's literally the end of the ear. After those hair cells inside the spiral cochlea, there's no more ear. The sound has now changed to electrical signals that go from there to the brain, in the form of electrical currents flowing in nerves.)

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3 years ago