Just want to make sure i am doing this problem correctly, or if i am way off.. Imagine that you place a cork measuring 1.3cm x 5.5cm x 3.0cm in a pan of water and on top of the cork you place a small cube of lead measuring 1.15cm on each edge. The density of the cork is 0.235 g/cm^3 and the density of the lead is 11.35 g/cm^3. Will the combination of cork plus lead float or sink?

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Just want to make sure i am doing this problem correctly, or if i am way off.. Imagine that you place a cork measuring 1.3cm x 5.5cm x 3.0cm in a pan of water and on top of the cork you place a small cube of lead measuring 1.15cm on each edge. The density of the cork is 0.235 g/cm^3 and the density of the lead is 11.35 g/cm^3. Will the combination of cork plus lead float or sink?

Chemistry
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|dw:1441237294565:dw|
Lead ~ 1.15cm x 1.15cm x 1.15cm
First I got the Volume of each Volume Cork = 21.45cm^3 Volume Lead = 1.52cm^3 Then i got the mass of each Mass Cork = 5.04g Mass Lead = 17.252g I don't know what do do now though.

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Total mass = 22.292
If it floats, the density is less than 1.00g/mL or 1.00g/cm^3 If it sinks, the density is greater than 1.00g/mL or 1.00g/cm^3
You were correct on combining the masses, now combine the volume to get its combined density.
So would the combined density be .97g/cm^3? this is with the long calculations Because if you do just the densities combined it = 11.585.
Because water density is usually at 1.00g/ml
Yea, I got that also.
ok thanks, so it would float?
Nope, you not add it because the question is asking will the "combination" of both sink? Even if lead sinks, the cork would not.
Yes, it would.
wait what?
It would float because with the calculations the total density is less that 1g/ml
The lead is not dense enough to make the lead able to sink.
Savannah_Lynn13 ok thanks, so it would float? Yes, it would.
thank you.
Savannah_Lynn13 So would the combined density be .97g/cm^3? this is with the long calculations Because if you do just the densities combined it = 11.585. Nope, you not add it because the question is asking will the "combination" of both sink? Even if lead sinks, the cork would not.
No problem!
Nice work attempting to solve the problem.

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