It is unchanged. The density is the mass divided by the volume, and as both of these numbers are halved the density does not change.
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Yes, a nickel is half a dime!
You have a half dollar and a nickel. One of them, the half dollar, is not a nickel.
A half dollar and a nickel. One of them isn't a nickel, the other one is.
A half dollar and a nickel. One of them isn't a nickel, the other one is.
A half dollar and a nickel. One of them isn't a nickel, the other one is.