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3 years ago

Name 3 examples of the Doppler Effect

Physics

1 answer:

sveta [45]3 years ago

5 0

Answer:

The drop in pitch of ambulance sirens as they pass by and the shift in red light are common examples of the Doppler Effect.

...

It is used in:

Sirens.

Astronomy.

Radars.

Medical imaging and blood flow management.

Flow management.

Velocity profile management.

Satellite communication.

Audio.

(It is so much but you can select three of them and write it)

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A girl delivering newspapers covers her route by traveling 2.00 blocks west, 3.00 blocks north, and then 7.00 blocks east.

Katyanochek1 [597]

She travels 2+3+7 blocks for a total of 12 blocks (B part)
So she travels √(5^2+3^2) = √34 blocks part(A)

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3 years ago

In a certain velocity selector consisting of perpendicular electric and magnetic fields, the charged particles move toward the e

Aneli [31]

Answer:

Down.

Explanation:

In the given question, the charged particle is moving towards the east direction. Suppose east direction towards the positive x-axis.

And the magnetic field directed towards to the north direction. Suppose north direction towards the positive y-axis.

Therefore force of magnetic field can be calculate by the formula,

$F=q(vi\times Bj)\\F=qvB(k)$

Therefore force of the magnetic field is in positive z-axis means in an upward direction.

Now the force on the electric field must be in the opposite direction means it is in a downward direction.

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3 years ago

The sentence, "The popcorn kernels popped twice as fast as the last batch," is a(n) _____. experiment hypothesis observation con

valentinak56 [21]

The correct answer is C. Observation

Explanation:

An observation is a statement a describes a phenomenon, which is the result of measuring the phenomenon or using the senses to collect information about it. Additionally, observations are part of the Scientific method because through observations it is possible to understand phenomena.

The sentence presented is an observation because this statement is the result of the researcher observing or measuring how fast kernels pops, which means the statement derives from studying a phenomenon. Also, this cannot be classified as a hypothesis because a hypothesis is a probable explanation, and it cannot be classified as an experiment because the experiment is the general method to prove or disprove a hypothesis.

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3 years ago

A train travels from over city to another its initial velocity is lower than its final velocity this is a example of

Anni [7]

I belive the answer is D)

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3 years ago

A soccer player kicks a 0.44 kg ball with a force of 57.6 N, what is the ball’s acceleration

noname [10]

THE BALL'S ACCELERATION IS 130.90 $\frac{m}{s}$

Explanation:

According to Newton's second law "the force (F) acting on an object is equal to the mass (m) of an object times its acceleration (a)", meaning that when the soccer player kicks a ball, a force is acting on the ball, therefore increasing it's acceleration

SO FOR CALCULATING THIS WE WILL USE NEWTON LAW,

FORCE = MASS × ACCELERATION

WE ARE GIVEN

FORCE = 57.6N

MASS= .44KG

SO HERE WE APPLYING FORMULA ,WE WILL GET

ACCELERATION = $\frac{FORCE}{MASS}$

ACCELERATION = $\frac{57.6N}{.44KG}$

ACCELERATION =130.90 $\frac{m}{s}$

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3 years ago