2 years ago

For a stationary observer, when the source of a sound is moving, its pitch appears to change.

Physics

2 answers:

borishaifa [10]2 years ago

8 0

it was the question.....they was asking if it was true or false

irakobra [83]2 years ago

4 0

By gosh you've nailed it, Sam. That's a true statement.

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If a mass of .343 kg moves down a 5m ramp in 5.8 seconds, what is the velocity and KE developed by the moving mass

Soloha48 [4]

Velocity 0.86m/s

0.13J

Explanation:

Given parameters:

Mass = 0.343kg

distance = 5m

time taken = 5.8s

Unknown:

Velocity of mass = ?

Kinetic energy = ?

Solution:

Velocity is the rate of change of displacement with time. It is a vector quantity that shows magnitude and direction.

Mathematically;

Velocity = $\frac{displacement}{time}$

Velocity = $\frac{5}{5.8 }$ = 0.86m/s

Kinetic energy is the energy due to the motion of a body. It is expressed mathematically as:

Kinetic energy = $\frac{1}{2} m v^{2}$

m is the mass

v is the velocity

Kinetic energy = $\frac{1}{2 } x 0.343 x 0.86^{2}$ = 0.13J

learn more:

Kinetic energy brainly.com/question/6536722

#learnwithBrainly

7 0

3 years ago

Three cars with identical engines and tires start from rest, and accelerate at their maximum rate. Car X is the most massive, an

aksik [14]

Answer:C) car X

Explanation:

Given

All the cars have identical Engine thus Force Produced by car X will be equal to Y and Z

and $Force=mass\times acceleration$

Since Car X is most massive so acceleration associated with it will be minimum

acceleration of car X is minimum thus it will travel farthest

6 0

2 years ago

What distance does a biker travel if he rides at a constant speed or 22 m/s for 45 seconds?

vredina [299]

Answer:

it would be 990 m.

Explanation:

22 m/s x 45 seconds.

5 0

2 years ago

What is an expression for the vertical component of this vector?

grandymaker [24]

The correct choice is D .

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2 years ago

In the simulation above, as the projectile travels downward, how does the vertical velocity change?

NARA [144]

B) is the correct answer

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2 years ago

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