3 years ago

Which type of hearing problem can be reduced which ordinary hearing aids

Physics

1 answer:

Paul [167]3 years ago

8 0

Conduction deafness.

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What state of matter does sound travel the fastest?

antoniya [11.8K]

Sound travels fastest through matter in the solid state.

I know this from having answered a huge number of Brainly questions that required me to look up things like this:

-- Speed of sound in air . . . about 340 m/s

-- Speed of sound in sea-water . . . about 1,500 m/s

-- Speed of sound in steel . . . about 5,960 m/s

6 0

4 years ago

A 70.0-kg skier is sliding at 4 m/s when they slide down a 2m high hill. At the bottom of the hill they run into a large 2800 N/

Katarina [22]

Answer:

$\Delta x=245\ mm$

Explanation:

Given:

mass of skier, $m=70\ kg$

initial velocity of skier, $u=4\ m.s^{-1}$

height of the hill, $h=2\ m$

spring constant, $k=2800\ N.m^{-1}$

final velocity of skier before coming in contact of spring:

Using eq. of motion:

$v^2=u^2+gh$

$v^2=4^2+9.8\times 2$

$v=5.9666\ m.s^{-1}$

Now the time taken by the skier to reach down:

$v=u+gt$

$5.9666=4+9.8\ t$

$t=0.2007\ s$

Now we calculate force using Newton's second law:

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

$F=\frac{m(v-u)}{t}$

$F=\frac{70\times(5.9666-4)}{0.2007}$

$F\approx686\ N$

∴Compression in spring before the skier momentarily comes to rest:

$\Delta x=\frac{F}{k}$

$\Delta x=\frac{686}{2800}$

$\Delta x=0.245\ m$

$\Delta x=245\ mm$

4 0

3 years ago

The kinetic energy and the potential energy of the cannonball is constantly ________ as it travels through the air.

enot [183]

Answer:

C. Constant

Explanation:

The total energy of the cannonball remains constant as it travels through the air.

4 0

3 years ago

This picture represents A: Reflection B: Refraction C: Interference D: Diffraction

-BARSIC- [3]

Answer:

I think it's a because it goes thru it and reflects

5 0

2 years ago

What is the kinetic energy of a 4 kg toy car moving at 5 m/s?

Mamont248 [21]

Answer:

50 J

Explanation:

4 0

3 years ago