Physics, 27.08.2019 14:00 seoulux

Which best describes the motion of air particles when a sound wave passes through them? a. the particles move together and apart perpendicular to the direction of the wave. b. air particles move parallel to the sound waves c. the particles move perpendicular to the direction of the wave. d. the particles move both perpendicular and parallel to the direction of the wave.

Answers: 2

Show answers

Answers

Sound waves are like waves in the ocean. when there is an earthquake under the water, the waves are created but, they do not move the water. This is because the water is acting as a medium for the energy produced by that earthquake. Because the energy stored in the sound wave needs particles to bounce off of the answer is D.

Answer from: austinmiller3030

Before solving this question first we have to understand longitudinal wave and transverse wave.

A longitudinal wave is a wave in which the particles of the medium vibrate parallel to the direction of propagation of wave. In this type of wave one will notice compressions and rarefactions. Compressions are high pressure zones where the particles of the medium are close to each other . The rarefactions are low pressure zones where there will be large separation between particles.

A longitudinal wave is a repeated motion of compressions and rarefactions. The particle of the medium show a little displacement along the direction of wave.

A transverse wave is a wave in which the particle vibration is perpendicular to the direction of propagation of wave .In this type of wave one will notice crests and troughs.It is a repeated motion of crests and troughs.

Sound wave is a longitudinal wave. When it passes through air it forms rarefactions and compressions.

Hence from the above we get that out of the four options given in the question only option B is right which depicts that the air particles move parallel to the sound waves.

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Answer from: Quest

not too sure thinking all accelerations are pointed down

Other questions on the subject: Physics

Physics, 22.06.2019 09:00, kiarajack456

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.

Answers: 1

continue

Physics, 22.06.2019 12:00, P4thing

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Answers: 3

continue

Physics, 22.06.2019 15:50, sophie5064

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Answers: 1

continue

Physics, 22.06.2019 16:40, odalysesquermon

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

Answers: 1

continue

You know the right answer?

Which best describes the motion of air particles when a sound wave passes through them? a. the part...