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Ipatiy [6.2K]
2 years ago
11

3 help with physics!! ---------------- will give brainliest

Physics
1 answer:
Zinaida [17]2 years ago
6 0

Answer:

Answer B

Explanation:

An increase in resistance makes it harder for the electric current to pass through

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Would sound travel faster in a thick piece of metal (high density) or a large hollow piece of metal (low density)?
KiRa [710]

Answer:

See the explanation below

Explanation:

The speed of sound waves can be calculated using the following equation:

v_{s}=\sqrt{\frac{E}{ro} } \\where:\\E = Young's modulus [GPa]\\ro = density of the material [kg/m^3]

Let's do the exercise of comparing two materials one denser than the other, as is steel and aluminum

ro_steel = 7500 [kg/m^3]

ro_aluminum = 2700 [kg/m^3]

E_steel = 200 [GPa]

E_aluminum = 70 [GPa]

Now replacing the values in the equation for each material.

v_{steel}=\sqrt{\frac{200*10^9}{7500}}\\ v_{steel}=5163[m/s]

And for the aluminum

v_{aluminum}=\sqrt{\frac{70*10^9}{2700} }\\ v_{aluminum}=5091.75[m/s]

In this way we can see that sound propagates faster in denser materials.

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3 years ago
Motivate me for my exam​
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Explanation:

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4 years ago
Which of the following is not a metric base unit? *<br> Meter<br> Liter<br> Inch<br> Gram
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