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4 years ago

Match the following words with their definitions.

Physics

2 answers:

Brrunno [24]4 years ago

7 0

Answer:

1. Doppler Effect = The apparent change in frequency perceived when the source of sound is approaching or moving away from an observer

2. Beats = The vibration of an object at its natural frequency, caused by a force or wave of the same frequency

3. Resonance = a series of alternating reinforcements and cancellations produced by the interference of waves

4. Shockwave = The cone-shaped wave made by a particle moving faster than the speed of a wave in that medium

Explanation:

I hope this helps. :)

victus00 [196]4 years ago

7 0

Answer:

1. Doppler effect - the apparent change in frequency perceived when the source of sound is approaching or moving away from an observer.

2. Beats- a series of alternating reinforcements and cancellations produced by the interference of waves.

3. Resonance - the vibration of an object at its natural frequency, caused by a force or wave of the same frequency

4. Shock wave - the cone-shaped wave made by a particle moving faster than the speed of a wave in that medium

Explanation:

1. Doppler effect refers to the apparent change in the frequency of the source when there is relative motion between the source and the listener. The apparent frequency is greater than source when source and listener approach each other. It is less when source and listener move away from each other.

2. Beats are produced when two slightly different frequency waves interfere. alternate constructive interference and destructive interference produces loud and soft sound.

3. Resonance is the increase in the amplitude of wave when the object vibrates at its natural frequency when it is exposed to a periodic force having frequency very close to the natural un-damped frequency.

4. Shock wave is produced when a body travels at speed greater than the speed of sound in that medium. cone-shaped wave is formed.

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A 200-kg object has a 50-Newton rightward net force being applied to it. What is the magnitude of the rightward acceleration on

katovenus [111]

The formula for acceleration is force divided by mass.

Force = 50 N

Mass = 200 kg

Acceleration = ???

$\frac{50}{200} = \frac{1}{4}$

$\frac{1}{4} = 0.25$

~~

Acceleration = 0.25 m/s²

~~

Next time use, f = ma in a triangle,

F

M A

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I hope that helps you out!!

Any more questions, please feel free to ask me and I will gladly help you out!!

~Zoey

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3 years ago

The latitude of the city of Arlington is about 32.7357°. Calculate the following: (a) The angular speed of the Earth. (b) The li

julia-pushkina [17]

Answer:

Explanation:

a ) The earth rotates by 2π radian in 24 x 60 x 60 s

so angular speed ( w ) = 2π / (24 x 60 x 60) = 7.268 x 10⁻⁵ rad / s

b ) Linear speed of city of Arlington ( v ) = w r = w R Cosλ where R is radius of the earth and λ is latitude .

v = 7.268 x 10⁻⁵ x 6.371 x 10⁶ cos 32.7357

389.5 m /s

acceleration = w² r = w² R Cos 32.7357

= (7.268 x 10⁻⁵ )² x 6.371 x 10⁶ x cos 32.7357

=283.08 x 10⁻⁴ m/s²

c) velocity ratio =

w r /w R =

R cos 32.73/ R

= Cos 32.73

= 0.84 .

6 0

4 years ago

A horizontal force of 100 N is required to push a 50 kg crate across a factory floor at a constant speed. What is the accelerati

luda_lava [24]

Answer:

a = 2m/s^2

Explanation:

Force (F) = 100 N

Mass (m) = 50 kg

Here,

F = m×a

100 = 50 × a

a = 100÷50

a = 2m/s^2

Thus, the acceleration on the cart is a = 2m/s^2

-TheUnknownScientist

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3 years ago

What is the entire range of em waves called

Olin [163]

The entire range of anything is called its spectrum.

For em wavelengths, it's the electromagnetic spectrum.

7 0

4 years ago

In air, the 57 GHz radio wave has a shorter<br> wavelength compared to the 64 GHz radio wave.

dalvyx [7]

Answer:

False

Explanation:

Higher frequency signals have shorter wavelengths. Hence, the 64 GHz signal will have a shorter wavelength than the 57 GHz signal.

Frequency and wavelength are inversely proportional meaning as frequency increases wavelength decreases and as frequency decreases wavelength increases.

Cheers.

6 0

3 years ago