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yawa3891 [41]
3 years ago
9

If a stereo has a dial that changes the volume of the sounds the stereo makes, what is the dial doing? a. changing the number of

times a wave passes by a point b. changing the pitch of the sound waves. c changing the length of the sound waves d. changing the amplitude of the sound waves
Physics
2 answers:
Over [174]3 years ago
8 0
If the stereo has a dial that changes the volume of the sounds the stereo makes, the one that being done by the dial is : D. Changing the amplitude of the sound waves

Hope this helps
babymother [125]3 years ago
6 0

Answer: The correct answer is (d).

Explanation:

The stereo has a dial that changes the volume of the sound the stereo makes.

The intensity of the sound increases with the amplitude of the sound wave. The energy of the sound wave is directly proportional to the amplitude of the wave.

The loudness of the sound increases with increase in the amplitude of the sound wave.

Therefore, the stereo has a dial that changes the volume of the sound the stereo makes. In this case, the dial is changing the amplitude of the sound waves.  

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A plane wall of thickness 0.1 mm and thermal conductivity 25 W/m K having uniform volumetric heat generation of 0.3 MW/m3 is ins
juin [17]

Answer:

The maximum temperature is 90.06° C

Explanation:

Given that

t= 0.1 mm

Heat generation

q_g=0.3\ MW/m^3

Heat transfer coefficient

h=500\ W/m^2K

Here one side(left side) of the wall is insulated so the all heat will goes in to right side .

The maximum temperature will at the left side.

Lets take maximum temperature is T

Total heat flux ,q

q=q_g\times t

q=0.3\times 1000000\times 0.1 \times 10^{-3}\ W/m^2

q=30\ W/m^2

So the total thermal resistance per unit area

R=\dfrac{t}{K}+\dfrac{1}{h}

R=\dfrac{0.1\times 10^{-3}}{25}+\dfrac{1}{500}

R=0.002 K/W

We know that

q=ΔT/R

30=(T-90)/0.002

T=90.06° C

The maximum temperature is 90.06° C

3 0
3 years ago
Kepler's first law states that planets orbit the Sun in a path called a(n)
wariber [46]
The answer would be C.
3 0
3 years ago
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Outside the Solar System is there any gravitational pull from the Sun?
babunello [35]

Answer:

our sun is one of the least 100 billion stars in the milky way a spiral galaxy about 100000 light years across

6 0
3 years ago
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A lead ball is dropped into a lake from a diving board 5.0 m above the water. After entering the water, it sinks to the bottom w
nirvana33 [79]

Answer:

|D_{depth} |=19.697m

Explanation:

To find Depth D of lake we must need to find the time taken to hit the water.So we use equation of simple motion as:

Δx=vit+(1/2)at²

x_{f}-x_{i}=v_{i}t+(1/2)at^{2}\\  -5.0m=(o)t+(1/2)(-9.8m/s^{2} )t^{2}\\ -4.9t^{2}=-5.0\\ t^{2}=5/4.9\\t=\sqrt{1.02} \\t=1.01s

As we have find the time taken now we need to find the final velocity vf from below equation as

v_{f}=v_{i}+at\\v_{f}=0+(-9.8m/s^{2} )(1.01s) \\v_{f}=-9.898m/s

So the depth of lake is given by:

first we need to find total time as

t=3.0-1.01 =1.99 s

|D_{depth} |=|vt|\\|D_{depth} |=|(-9.898m/s)(1.99s)|\\|D_{depth} |=19.697m

6 0
3 years ago
write a motivational speech to someone who wants to become a scientist please write this as it is for kids :) PLEASEE HELP!!!!
Gekata [30.6K]

Answer:

A motivational speech for a to be scientist. Crazy experiments and more you have the right to be whatever you adore. Your young yet strong everything will come along. I believe in you and so should you since your becoming a scientist you’ll acquire it soon. You’ll discover new things and sight to see when you become a scientist make sure to call me. :)

Explanation:

Hope it’s good I made up a couple words that rhyme good luck!

6 0
3 years ago
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