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3 years ago

When the man's sound waves are reflected off of the walls, what happens to them?

Physics

2 answers:

gavmur [86]3 years ago

8 0

The answer is A) they become twice loud

lara31 [8.8K]3 years ago

3 0

I think it is D sorry it’s wrong

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Only one symbol must be included in every circuit diagram. What symbol is it?

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Answer:

A symbol for a battery.

Explanation:

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A cylindrical rod of length L is connected across a fixed potential difference, creating a current I through the rod. What would

Inessa05 [86]

Answer:

The value of current through the rod becomes half

$i' = \frac{i}{2}$

Explanation:

As per Ohm's law we know that the current through a resistor is given as

$i = \frac{V}{R}$

here we know that

$R = \rho \frac{L}{A}$

here we know that the length of the cylinder is L and area is A so the value of current through the rod is given as

$i = \frac{V A}{\rho L}$

now we have change the length of the conductor to twice of initial value and rest all parameters will remain the same

so we will have

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now from above two equations we have

$\frac{i}{i'} = 2$

so new current will become

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3 years ago