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Kazeer [188]
4 years ago
13

What is the primary source of sound

Physics
2 answers:
Semmy [17]4 years ago
7 0

Any vibrating matter is a source of sound.  If there's a medium around it, then the vibrations can set up waves in the medium and carry their energy away from the source.  If their frequency and amplitude happen to be within the detection capability of some detecting device, such as an ear, AND some of the waves happen to strike the device, then their presence will be detected as sound. (they'll be "heard")

elixir [45]4 years ago
5 0

The sound waves are generated by a sound source, such as the vibrating diaphragm of a stereo speaker. The sound source creates vibrations in the surrounding medium. As the source continues to vibrate the medium, the vibrations propagate away from the source at the speed of sound, thus forming the sound wave.

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C.) A Thin tungsten filament
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4 years ago
The angle θ is slowly increased. Write an expression for the angle at which the block begins to move in terms of μs.
Reika [66]

Answer:

tan \theta = \mu_s

Explanation:

An object is at rest along a slope if the net force acting on it is zero. The equation of the forces along the direction parallel to the slope is:

mg sin \theta - \mu_s R =0 (1)

where

mg sin \theta is the component of the weight parallel to the slope, with m being the mass of the object, g the acceleration of gravity, \theta the angle of the slope

\mu_s R is the frictional force, with \mu_s being the coefficient of friction and R the normal reaction of the incline

The equation of the forces along the direction perpendicular to the slope is

R-mg cos \theta = 0

where

R is the normal reaction

mg cos \theta is the component of the weight perpendicular to the slope

Solving for R,

R=mg cos \theta

And substituting into (1)

mg sin \theta - \mu_s mg cos \theta = 0

Re-arranging the equation,

sin \theta = \mu_s cos \theta\\\rightarrow tan \theta = \mu_s

This the condition at which the equilibrium holds: when the tangent of the angle becomes larger than the value of \mu_s, the force of friction is no longer able to balance the component of the weight parallel to the slope, and so the object starts sliding down.

4 0
4 years ago
Water that flows from behind a large dam can cause machines to produce electricity. What change takes place?
lyudmila [28]
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3 years ago
A woman living in a third-story apartment is moving out. Rather than carrying everything down the stairs, she decides to pack he
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Answer:

T = 480.2N

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By using the equation (1) you obtain:

T=Mg=(49kg)(9.8m/s^2)=480.2N

The woman needs to pull the rope at 480.2N

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At what point in the swing of the pendulum is the potential energy completely converted into Kinetic energy
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