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4 years ago

Which equations could be used as is, or rearranged to calculate for frequency of a wave? Check all that apply.

Physics

2 answers:

gregori [183]4 years ago

4 0

First one second one and last one

vovangra [49]4 years ago

4 0

Answer: BCDE

speed = frequency x wavelength

wavelength = speed / frequency

frequency = speed / wavelength

speed = wavelength x frequency

Explanation:

on Edge 2020

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Which device records digital signals? A. V C R tape. B. C D. C. phonograph record. D. audio cassette.

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Answer:

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4 years ago

Which two factors affect the amount of thermal energy an object has?

Scrat [10]

Answer:

Explanation:

1) The average kinetic energy of the particles of the object or the temperature of the substance.

2) The mass of the object.

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3 years ago

A police officer in hot pursuit of a criminal drives her car through an unbanked circular (horizontal) turn of radius 300 m at a

Mamont248 [21]

Answer:

The angle (relative to vertical) of the net force of the car seat on the officer to the nearest degree is <u>10°.</u>

Explanation:

Given:

Mass of the driver is, $m=55\ kg$

Radius of circular turn is, $R=300\ m$

Linear speed of the car is, $v=22.2\ m/s$

Since, the car makes a circular turn, the driver experiences a centripetal force radially inward towards the center of the circular turn. Also, the driver experiences a downward force due to her weight. Therefore, two forces act on the driver which are at right angles to each other.

The forces are:

1. Weight = $mg=55\times 9.8=539\ N$

2. Centripetal force, 'F', which is given as:

$F=\frac{mv^2}{R}\\F=\frac{55\times (22.2)^2}{300}\\\\F=\frac{55\times 492.84}{300}\\\\F=\frac{27106.2}{300}=90.354\ N$

Now, the angle of the net force acting on the driver with respect to the vertical is given by the tan ratio of the centripetal force (Horizontal force) and the weight (Vertical force) and is shown in the triangle below. Thus,

$\tan \theta=\frac{90.354}{539}\\\tan \theta=0.1676\\\theta=\tan^{-1}(0.1676)=9.52\approx 10$ °

Therefore, the angle (relative to vertical) of the net force of the car seat on the officer to the nearest degree is 10°.

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3 years ago

To identify a satirical tone, look for words an author uses to exaggerate a particular character behavior to make that person ap

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To identify a satirical tone, look for words an author uses to exaggerate a particular character behavior to make that person appear ridiculous to the reader. The statement is True.

<h3>What is character?</h3>

What a person thinks upon a situation and get through it makes the character of a person and defines his behavior.

Given is a statement "To identify a satirical tone, look for words an author uses to exaggerate a particular character behavior to make that person appear ridiculous to the reader".

The words used by the person forms the character. So, the author searches for the word which says about his character but the reader finds it ridiculous.

Thus, the statement is true.

Learn more about character.

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2 years ago

Microphones and loudspeakers are used in an auditorium because the sound waves at the stage compared to the sound waves at the b

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3 years ago