Homework Help: Physics, still don't get it!

Posted by Mary on Monday, April 9, 2007 at 12:33am.

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight is 1.09 N?

For Further Reading

Physics - DrRuss, Friday, April 6, 2007 at 1:24am
The sequence here is..

The implication in the question is to find out how much of the weight is gold, so do this using the fraction given.

Convert the weight to mass using F=ma and I would use a=9.8 m s^-2 unless your question/text book has a different value.

Now convert the mass to volume using density=mass/volume. The density of gold you will need to get from a data book, wikipedia, or maybe it is in the question/text book.

Please clarify this explanation.

Could post what you have done so far?

F = ma

F/a = m

20.0/ 9.81 = 2.0387

density = mass/volume

volume = mass / 19300

volume = 0.0001056

This answer is incorrect. I am confused!

in your
mass=weight/g you put 20 for weight, That is not correct, it was given as about one newton.

Correct that, then 20/24 of that mass is gold.

Take the mass of gold, divide by the density of gold (look it up), and you have volume of gold.

GOLD DUST FOR SALE - BENSON IMO, Tuesday, January 17, 2012 at 5:03am
GOLD DUST FOR SALE

Dear Sir/ Madam,
We are small scale Gold miners here on the sub-region of West Africa. We have some huge

quantity of alluvial Gold Dust for sale at a considerable price of $30,500USD per kilo

which is below world market price, 22 carat and 92.05% purity. If you are interested, do

not hesitate to get back to us as soon as possible for us to give you our full co-operate

offer (FCO)
Best Regards
MR BENSON IMO

Answer this Question

Related Questions

Physics - The karat is a dimensionless unit that is used to indicate the ...
Physics - The "karat" is a dimensionless unit that is used to indicate...
Physics please check - The "karat" is a dimensionless unit that is ...
Algebra - The purity of gold is measured in karats. Twenty-four karat gold is ...
physics - The British Sovereign coin is an alloy of gold and copper having a ...
Algebra 2 - The purity of gold is measured in karats. Twenty-four karat gold is ...
physics - a piece of gold aluminuim alloy weighs 100g in air and 80g in water....
College Algebra - Chemistry - A goldsmith has two gold alloys. The first alloy ...
algebra - assume that a jeweler needs 80 grams of an alloy that is 30% gold. He ...
Chemistry - A homogenous mixture of metals is called an alloy. An alloy is found...

For Further Reading

First Name:
School Subject:
Answer: