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777dan777 [17]
3 years ago
7

_____ is very corrosive and can cause rusting so metal tanks shouldn't be used

Physics
1 answer:
bagirrra123 [75]3 years ago
5 0

Answer:

Iron

Explanation:

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What is it called when the moon passes through the penumbra of Earth’s shadow?(1 point)
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Answer:  I'm not sure, but I think it would be a <em>total lunar eclipse </em>

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A natural resource that is in limited supply is known as a _________________.
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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.

6 0
3 years ago
No links plz!!
Pavlova-9 [17]

Answer:

Light

Explanation:

The way a concave mirror works is that since it's concave, the light bounces off of each other. a convex mirror, it curved the opposite, and the mirror has no way to bounce off of itself.

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2 years ago
When a gun is fired at the shooting range, the gun recoils (moves backward). Explain this using the law of conservation of momen
finlep [7]
Its called linear momentum i think...
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