What is the average density of copper

You probably already know this. Anyway, thanks. Appreciate it. Charles, Junior at Lebanon High School. Electronic scale Affiliate Link finishing. But, since this is a science page, let's think about that. Stream of consciousness: Typewriters have been mass produced since and were used by millions of people.

Are we really confident that nobody ever thought of a smiley in over years? Which introduces the question of whether parentheses existed in ? No, I see their first use in English was in But was their shape back then close enough to a smiling mouth to be used as a smiley? As we see, the question of when something was invented or discovered, and by whom, is often a foggy issue.

I'm doing a school project about copper and I have no clue what these are -- what are the physical description of copper? Thanks for your help. I have posted this question because I'm doing a school project. I will be very glad if you answered me. I'm doing this project but I have no clue. You've never been warned about handling copper, have you? Yet pennies are copper; and so is most wire, a lot of plumbing piping, and the bottoms of some pots.

And some people wear copper bracelets. So I doubt that there are special dangers and cautions for normal handling of copper. Please ask your librarian to help you find an age-appropriate book about metals. We'll be happy to help if you get stuck on some particular question, but teachers ask us that when students post their homework assignments we should please just tell them to do their own homework I'm a little late for this discussion, but let me throw in my 2 cents. In , the U.

The quick way to tell the difference is weight. Currently, pennies that contain no copper being minted by Uncle Sam cost about 2 cents to make; yes, you read that correctly. Pre pennies, and some pennies, actually contain about 3 cents worth of copper. And, that would be a troy pound. Precious metals are traded in troy weight; roughly Since I'm over 50, I remember when the amount of silver in pre dimes, quarters, half dollars, and dollar coins was worth more than their face value.

So, when all the silver coins were worth more than their face value the silver content cost more than their face value people started hoarding them for their silver value. The hoarding caught the Mint off guard, and there was a shortage of coins until the Mint could crank out the silver clad coins. I remember stores handing out candy or coupons for change until the Mint could get new coins into circulation.

If you're thinking about hoarding pennies, you'll need an awful lot of pennies to make it worth the trouble. This is one of those real-life applications of math, chemistry, economics, commodities, and some law.

I had a huge report to write and believe it or not, it is hard to find a simple answer to this question, thank you! Okay, so here is a slight twist on the discussion of Copper density: does it change as you permanently deform it? In this article we learn how to design a simple PWM speed controller for a Oct 14, Industrial Heat Exchangers Oct 5, Capacitor Basic Calculations Apr 18, How Optocouplers Work Apr 18, Thermostatic Radiator Traps Apr 15, Disclaimer Contact Us Cookies Policy.

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How many times better is silver than nichrome at conducting electricity? If you had to replace the cable in Question 3 with aluminium, what would the diameter need to be to have the same resistance? The unit of conductivity is the Siemens m Find out who Siemens was and where you will find his name today. Go to the download section to access zip files of all resources for each subject and age group for use offline. Density The two blocks below are the same size, but the copper one has a greater mass than the aluminium one.

Now the proportionality can be changed to an equation. Resistivity Calculating resistivity uses the same mathematical approach.

A Thought Experiment with Copper and Aluminium Wires If the top wire length L and cross section area A has a resistance R, then there are two things we can say about the next two wires.

Questions and Activities 1. Calculate the resistance of a copper cable 50 mm in diameter and 30 km long. Return to Bulk Properties of Copper: Introduction.

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