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3 years ago

A sound wave of frequency

Physics

2 answers:

Nat2105 [25]3 years ago

8 0

Answer:

Wavelength = 0.28m

Explanation:

Speed = wavelength × frequency

Wavelength = 343/1210 = 0.28m

PtichkaEL [24]3 years ago

3 0

Answer:

0.28m

Explanation:

Velocity = frequency x wavelength

Given

Frequency = 1210Hz

Velocity = 343m/s

Therefore

343 = 1210 x wavelength

Divide both sides by 1210

343/1210 = 1210/1210 x wavelength

0.28 = wavelength

Wavelength = 0.28m

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A model train engine was moving at a constant speed on a straight horizontal track. As the engine moved along, a marble was fir

bagirrra123 [75]

Answer:

The marble was moving in a projectile and the speed of the engine was 2.716 m/s

Explanation:

The vertical component of the marble's flight path relative to the train

is given by the equation y(t) = v*t - (4.9)*t^2,

where, v is the initial upward velocity of the marble relative to the train.

So with y(1) = v - 4.9 = 0 we have

v = 4.9 m/s.

The marble will reach maximum height after 0.5 seconds, at which the

height will be y(0.5) = (4.9)*(0.5) - (4.9)*(0.5)^2 = (4.9)*(0.25) = 1.225 m.

Now, the marble has a vertical velocity component of 4.9 m/s and a horizontal velocity component

of V m/s such that tan(61) = 4.9 / V

V = 4.9 / tan(61) = 2.716 m/s

This horizontal velocity component of the marble is the same as the

speed of the train i.e. 2.716 m/s.

3 0

3 years ago

What is the significance of Nucleotides in Chromosomes?

fgiga [73]

Answer:

it comprises of the DNA/RNA bipolymer molecules

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3 years ago

Read 2 more answers

Stress distributed over an area is best described as: a) External force b) Axial force c) Radial force d) Internal resistive for

Anit [1.1K]

Answer:

Option D is the correct answer.

Explanation:

Stress is the force per unit area that tend to change the shape of body.

Stress is defined as internal resistive force per unit area.

$\texttt{Stress}=\frac{\texttt{Internal resistive force}}{\texttt{Area}}$

$\sigma =\frac{F}{A}$

So, so stress distributed over an area is best described as internal resistive force.

Option D is the correct answer.

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3 years ago

A television has a mass of 19 kg. What is the weight of the television?

soldi70 [24.7K]

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3 years ago

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Calculate the horizontal force that must be applied to a 1,300 kg vehicle to give it an acceleration of 2.6 m/s² on a level road

ANEK [815]

The answer is 3,380 N

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3 years ago