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2 years ago

Which statement best describes the motion of air particles in a sound wave?

Physics

2 answers:

Elodia [21]2 years ago

8 0

Answer:

The answer is D.

Explanation:

They vibrate parallel to the wave.

During the propagation of a sound wave in air, the vibrations of the particles are most accurately represented as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium occurs in a direction that is parallel to the direction of energy transmission.

Zolol [24]2 years ago

7 0

Answer
D
Mark me brilliant

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How is the density of water different from the densities of most other substances?

Ket [755]

Answer:

In practical terms, density is the weight of a substance for a specific volume. The density of water is roughly 1 gram per milliliter but, this changes with temperature of if there are substances dissolved in it. Ice is less dense than liquid water which is why your ice cubes float in your glass.

Explanation:

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2 years ago

One factor of x^3-3x^2-4x+12 is x+2. find the remaining factors

telo118 [61]

Dividing x^3 - 3x^2 - 4x + 12 by x + 2 gives

x^2 -5x + 6

= (x - 3)(x - 2)

so remaining factors are x - 3 and x - 2 answer

6 0

2 years ago

The angle of elevation from a point on the ground to the top of a pyramid is 37 degrees 50' The angle of elevation from a point

Serjik [45]

Answer:

The height of the pyramid is approximately 104 Ft. See the graphic attached.

Explanation:

First, you have to plot to realize that you have two rectangle triangles, formed by the different elevation points of view. From there you can have a system of two equations, with two unknown values.

Equation (1)

$tan 37^{o}50'= \frac{Ph}{x} \\\\Ph=tan 37^{o}50' x= 0.7766 x$

Equation (2)

$tan 18^{o}10'=\frac{Ph}{x+183} \\\\Ph=[tan 18^{o}10'][x+183]=[0.3281][x+183]$

Matching (1) and (2)

$0.7766 x=0.3281(x+183)\\\\(0.7766-0.3281)x=60.05\\\\x=\frac{60.05}{0.4485} =133.89ft$

replacing x value in (1)

$Ph=0.7766*133.89=103.9789\\Ph = 104 ft$

5 0

3 years ago

A charge of 4.5x10^-5 C is placed in an electric field with a strength of 2.0x10^4 N/C. What is the electric force acting on the

Alex

Answer:

0.9 N

Explanation:

The electric force acting on a charge is given by:

$F=qE$

where

q is the magnitude of the charge

E is the strength of the electric field

In this problem, we have

$q=4.5\cdot 10^{-5}C$ is the charge

$E=2.0\cdot 10^4 N/C$ is the strength of the electric field

Substituting into the equation, we find

$F=(4.5\cdot 10^{-5}C)(2.0\cdot 10^4 N/C)=0.9 N$

6 0

3 years ago

Newtons first law of motion states that the velocity of an object doesn’t change if the forces acting on the object are

Gnom [1K]

Balenced

Think of it this way if 2 same weight and same speed objects were racing toward each other perfectly straight then their forces will cancel out and the movement afterwords will be 0

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2 years ago