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3 years ago

How does a sound wave transfer energy to your ears ?

Physics

2 answers:

horrorfan [7]3 years ago

7 0

Answer:

A. Particles in air move in circles as the wave moves forward.

B. Particles in air move forward but not backward as the wave moves

forward.

C. Particles in air move up and down as the wave moves forward.

✔ D. Particles in air move forward and backward as the wave moves

forward.

Explanation:

The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. Your ear detects sound waves when vibrating air particles cause your ear drum to vibrate. The bigger the vibrations the louder the sound.

PSYCHO15rus [73]3 years ago

7 0

Answer:

Sound waves travel at 342 m/s through the air and faster through liquids and solids. The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. your ear detects sound waves when vibrating air particles cause your eardrum to vibrate. The bigger vibrations the louder the sound.

Explanation:

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An electric field of 710,000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of

Anni [7]

Answer:

The magnitude of force is $4.26\times 10^{- 6} N$

Solution:

As per the question:

The strength of Electric field due west at a certain point, $\vec{E_{w}} = 710,000 N/C$

Charge, Q = - 6 C

Now, the force acting on the charge Q in the electric field is given by:

$\vec{F} = Q\vec{E_{w}}$

$\vec{F} = -6\times 710,000 = - 4.26\times 10^{- 6} N$

Here, the negative sign indicates that the force acting is opposite in direction.

5 0

3 years ago

Help plz im lost

siniylev [52]

Gravitational potential energy=mass*gravitational acceleration*height
Kinetic energy = 0.5*mass*velocity²
So with the given data
K.E 0.5*1*x²=12.5 v²=12.5÷(0.5*1)
v=√12.5÷(0.5*1) v=5
GPE mass*gravitational acceleration*height
1*9.81*h=98
h=98÷(9.81*1)
h= 9.98 m

3 0

3 years ago

1. Which statement is true about natural

lara [203]

Answer:

1. D. They can be a substance, material, object or source of energy.

2. B. The properties will be different.

3. C. When two reactants form one product, the reaction is spontaneous.

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3 years ago

1. Which direction will the box move in the diagram below? (1 point)

svetoff [14.1K]

I think it would'nt move at all but im not postive

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4 years ago

Two ice skaters, paula and ricardo, push off from each other. ricardo weighs more than paula. part a which skater, if either, ha

ahrayia [7]

Apply the law of conservation of momentum for this situation. The law states that the momentum of a system is constant (in absence of external forces acting on it).

The 'system' in this case are the two skaters. There is no external force on the skaters. Suppose the skaters are initially standing still. The momentum in the system is 0. This value will need to remain constant, even after the mutual push (which is a set of forces from <em>inside</em> the system). So we know that

(total momentum before) = (total momentum after)

Indexing the masses and velocities by the first letter of the skaters' names:

$0 = m_P\vec v_P+m_R\vec v_R\\m_P\vec v_P = m_R(-\vec v_R)$

From the last row, you can see that the skaters will have momentum of same magnitude but opposite direction, after the push off. That answers the first question: neither will have a greater momentum (both will have one of same magnitude).

Since Ricardo is heavier, from the above equality it follows that

$m_R>m_P\implies|\vec v_R|$

In words, Paula has the greater speed, after the push-off.

7 0

3 years ago