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Schach [20]
3 years ago
12

You are trying to overhear a juicy conversation, but from your distance of 23.0 m , it sounds like only an average whisper of 40

.0 db . so you decide to move closer to give the conversation a sound level of 65.0 db instead.
Physics
1 answer:
Len [333]3 years ago
4 0
If its asking the distance for the 65 db then use a proportion, if otherwise pleas clarify. It sounds like a pretty juicy conversation.
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0°

Explanation:

The angle between force and displacement should be 0° in order to get the maximum work done.

 

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When Ф is zero, the maximum work done is attained

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3 years ago
An infinitely long cylindrical insulating shell of inner radius a and outer radius b has a uniform volume charge density p. Dete
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Answer: The electric field is: a) r<a , E0=; b) a<r<b E=ρ (r-a)/εo;

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As we know,

∫E.dr= Qinside/εo

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for a<r<b er have

E*2π*r*L= Q inside/εo       in this case Qinside= ρ.Vol=ρ*2*π*r*(r-a)*L

E*2π*r*L =ρ*2*π*r* (r-a)*L/εo

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E*2π*r*L =ρ*2*π*b* (b-a)*L/εo

E=ρ*b* (b-a)*/r*εo

3 0
3 years ago
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