Answer:
1)The rocks in Virginia represent many periods in history.
2)Virginia was once covered by a sea.
3)The Allegheny Plateau includes coal deposits.
4)The state’s climate was once warm and humid, like a tropical jungle.
Explanation:
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The re<span>sistance of the second wire is 16 R.
where R is the resistance of the first wire.
R = </span>ρ

where l = length of the wire
A = area of the wire
A =

where, r =

Thus, on finding the ratio of resistance of the two wires, we get,

here, R1 = R
l1 = 8m
l2 = 2m
A1=π

A1=π

we get. R2 = 16R
You will need too know the mass and velocity
Answer:
Both waves are mechanical waves
There's a few differences. In a physical change the actual substance doesn't change, where in a chemical change with chemical reaction, a new substance is formed. Physical change can be reversed, and chemical change can't.