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2 years ago

Why are earbud wires for an mp3 player coated with plastic

Physics

2 answers:

andriy [413]2 years ago

7 0

The naked wires are dangerous, so the plastic coating insulates and protects the wires :)

saw5 [17]2 years ago

6 0

2) they add the insulation to better the durability or the earbuds

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A uniform copper sphere and a uniform aluminum sphere have the same mass.What is the ratio of the radius of the aluminum sphere

neonofarm [45]

Answer:

$\frac{r_{Al}}{r_{Zn} }= 1.625 : 1$

Explanation:

$density = \frac{mass}{volume}$

ρ = $\frac{m}{v}$

making mass subject of formula we have

m=ρv

from the question aluminium and zinc have same mass hence we can say;

$m_{Al}=m_{Zn}$

which means; $ρ_{Al} V_{Al}=ρ_{Zn} V_{Zn}$

$\frac{ρ_{Al} }{ρ_{Zn} }= =\frac{V_{Zn} }{V_{Al} }$

$\frac{ρ_{Al} }{ρ_{Zn} }= =\frac{4\pi r_{Zn} ^{3} }{4\pi r_{Al}^{3} }$

$\frac{ρ_{Al} }{ρ_{Zn} }= =\frac{r_{Zn} ^{3} }{r_{Al}^{3} }$

$\frac{ρ_{Al} }{ρ_{Zn} }= =(\frac{r_{Zn}}{r_{Al} })^{3}$

$\frac{r_{Zn}}{r_{Al} }= \sqrt{\frac{ρ_{Al} }{ρ_{Zn} }}$

${ρ_{Al}= 2700{/tex] [tex]{ρ_{Zn}= 7130{/tex][tex]\frac{r_{Zn}}{r_{Al} }=\sqrt{\frac{2700 }{7130} }}$

$\frac{r_{Zn}}{r_{Al} }= 0.6154$

$\frac{r_{Al}}{r_{Zn} }=\frac{1}{0.6154}$

$\frac{r_{Al}}{r_{Zn} }= 1.625 : 1$

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2 years ago

The other name for 'net force' is 'unbalanced force'. What is the name of the force that could be applied to an object that woul

vivado [14]

Answer:

Since these two forces are of equal magnitude and in opposite directions, they balance each other. The book is said to be at equilibrium. There is no unbalanced force acting upon the book and thus the book maintains its state of motion. When all the forces acting upon an object balance each other, the object will be at equilibrium; it will not accelerate.

Explanation:

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1 year ago

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xeze [42]

Answer:

because well I dont even know sorryy but you got this

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2 years ago

How many neutrons does element X have if it's atomic number is 23 and its mass number is 70

Reptile [31]

<h2>Answer:</h2>