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Stolb23 [73]
3 years ago
7

A fighter plane is flying overhead at mach 1.50. What angle does the wave front of the shock wave produced make relative to the

plane's direction of motion (in degrees)?
Physics
1 answer:
olga2289 [7]3 years ago
8 0

Answer:

 θ = 41.80°

Explanation:

Given that

Mach number M= 1.5

We know that

M = u/c

Where c is the velocity of sound and u is the speed of plane

c= 340 m/s

So

u = 1.5 x 340 m/s

u = 510 m/s

We know that

sin\theta =\dfrac{c}{u}

Now by putting the values

sin\theta =\dfrac{c}{u}

sin\theta =\dfrac{340}{510}

 θ = 41.80°

So the angle will be 41.80°.

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Which of the following is an example in which you are traveling at constant speed but not at constant velocity?
grin007 [14]

Answer:

c) Driving around in a circle at exactly 100 km/hr.

This examples represents constant speed but not constant velocity.

Explanation:

To answer this question it is importan to know the difference between the concept of speed and velocity.

speed: Is the ratio of change in the displacement per unit of time. JUST  A MAGNITUDE

velocity: Is the ratio of change in the displacement per unit of time in a given direction. It is a composed value by magnitude and direction, this is know as a VECTOR.

So, in conclusion the speed is the magnitude or the scalar value, for the velocity vector.

In the example,

in a) Rolling freely down a hill in a cart, traveling in a straight line. <em>There is a component of acceleration, from earth gravity, so the speed is changing.</em>

<em />

in b) Driving backward at exactly 50 km/hr. <em> The direction and speed are the same, so speed and velocity are constant</em>.

In d) Jumping up and down, with a period of exactly 60 hops per minute. <em>There are changes in the speed, due to the acceleration and decceleration between the changes in the direction. Actually you have to stop to change direction between the ups and downs in the jumps. Also there is the gravitational component, always changing the speed.</em>

In c) Driving around in a circle at exactly 100 km/hr. <em>In this case the speed remains constant, while the direction is changing all the time.</em>

3 0
4 years ago
A student new to the study of hearing wanted to determine the ability of listeners to determine the difference in the duration o
denis23 [38]

Answer:

No, duration is not the sole reason.

Explanation:

The frequency is reciprocal of time period, so we can calculate the frequency differences between the waves as, (The frequency will not match with the actual waves frequency, since here the time for observing the wave is different)

Δf₁ = 1/5 - 1/20 = 0.15 Hz

Δf₂ = 1/200 - 1/400 = 2.5 x 10⁻³ Hz

So, the person will be able to differentiate between the waves which are farther apart. The duration of the individual tones is also important, since as the duration of the tones decreases, the number of frequencies in the wave increases (Fourier Transform), whereas a longer duration tone, has lesser number of frequencies.

One more reason is that the 200 msec and 400 msec duration waves are in frequency region of 1-5 Hz which cannot be heard by Humans.

3 0
3 years ago
The surface of water connect like a sort of sort of skin due to property of liquids called
nlexa [21]
It is called surface tension.
Hope that helped you.
7 0
4 years ago
Read 2 more answers
Which of the following is an example of the wind slowly causing changes in Earth's landforms?
stepan [7]
It is called Wind Erosion.
5 0
3 years ago
Which of the following ways of writing 1000w is incorrect?
xenn [34]

Answer:

the third one is incorrect

Explanation:

10 x 10³= 10^1 x 10^3 = 10^4

8 0
3 years ago
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