CHEMISTRY MIDDLE SCHOOL

What role does the inner ear play in hearing?captures sound waves
converts sound waves into electrical signals
removes high and low sound waves that are harmful
transmits sound waves from air to fluids

Answers

Answer 1
Answer:

Answer:

The ossicles amplify the sound. They send the sound waves to the inner ear and into the fluid-filled hearing organ (cochlea). Once the sound waves reach the inner ear, they are converted into electrical impulses. The auditory nerve sends these impulses to the brain.

Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The bones in the middle ear amplify, or increase, the sound vibrations and send them to the inner ear—also called the cochlea—which is shaped like a snail and is filled with fluid.
Answer 2
Answer:

Answer:

its (A) trust me I had that same qeu

Explanation:

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An investigation that is controlled is what

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when the the different things in an investigation are all in one way the same. Example: my project is to grow flowers in different shades of light I would still give the flowers the same amount of water and they would all be the same temperature. nothing but the diffrence in you project is  different 

In salt water solution,the salt is the blank

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In salt water solution, the salt is the solvent.

What causes the earth’s magnetic field?A.
currents in the earth’s liquid-metal outer core

B.
the mineral composition of the earth’s crust

C.
molten material in the mantle

D.
magnetic particles located at the earth’s poles

Answers

A. Currents in the earth’s liquid-metal outer core

Hope this helps!
i think its letter b. the mineral composition of the erath's crust

Sediments are almost always deposited in flat layers. Does it appear that forces in the Earth affected the rock layers in this region? What clues do you have?

Answers

Answer:

Explanation: Sediments or sedimentary rocks are formed from pre-existing rocks broken through the agents of denudation such as air, ice, water flow which carries the particles and deposits it, the accumulation of one layer on the others is called DEPOSITION. As the deposits keeps building, LITHIFICATION occurs which involves overburden pressure acting on the sediments in layers.

Note that during deposition oldest layers are below, while the younger layers are above

2. A solution in which 50 grams of salute is dissolved in 250 grams of solution has a concentration of

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The fact that the unit is supposed to be in percent makes me think it is referring to percent mass.  To find percent mass you need to find find the divide the mass of solute by the total mass of solution and than multiply that by 100%.
%mass=(50g/300g)x100%
%mass=0.167%

I hope this helps.

What is the wavelength of a 147-g baseball traveling at 91.0 mph?

Answers

The formula to determine the wavelength is, De-Broglie wavelength formula:

\lambda =(h)/(mv)      -(1)

where, \lambda is wavelength, m is mass, v is velocity and h is Planck's constant = 6.63* 10^(-34) Js = 6.63* 10^(-34) kgm^(2)s^(-1)

mass, m = 147 g  (given)

Since, 1 g = 0.001 kg

So, 147 g = 0.147 kg

v = 91.0 mph    (given)

Converting mph to mps:

Since, 1 mph = (1.609* 10^(3) ms^(-1))/(60* 60)

So, 90 mph = (91* 1.609* 10^(3) ms^(-1))/(60* 60) = 40.67 ms^(-1)

Substituting the values in formula 1:

\lambda =(6.63* 10^(-34) kgm^(2)s^(-1))/(0.147 kg* 40.67 ms^(-1))

\lambda =1.11* 10^(-34) m

Hence, the wavelength wavelength of a 147-g baseball traveling at 91.0 mph is

1.11* 10^(-34) m.

Answer: its D

Explanation:
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