Homework Help: Science (URGENT)

Posted by John on Thursday, May 7, 2009 at 2:57am.

Can someones please check my work?

1. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely?

A: It takes the shape of its contaienr because its particles can slip past each other. but it has fixed volume and does not diffuse like gas so it doesn't completely fill the container.

2. Describe the connection between kinetic energy and the movement of particles in a substane.

A: The more kinetic energy particles have, the faster they move. They get more excited.

3. Which physical propery is the ratio of the mass of a substance divided by its volume?

A: Density.

4. Mercury is a metal with a melting point of -39C and a boiling point of 357C. What is its state at:0C, 500C, -1C

A: 0C = solid, 500C = gas, -1C = solid

5. the melting point of silver metal is 962C, and its boiling point is 2162C. Describe how the particles appear in silver at 900C and at 3000C.

A: 900C = there are some space between particles. 3000C = there is a lot of space between particles.

Are they correct? If not, please correct me.

Thank you very much!

Science (URGENT) - SraJMcGin, Thursday, May 7, 2009 at 3:53am
Sorry that I can't help you here eiter, but here is Writeacher's lesson on How to Search:

It looks as if what you need to do is learn how to conduct thorough and effective searches for yourself. That's what research is, and I'm sure that's what your teacher expects you to do -- conduct research. You are searching for information that is so specific that you have to be prepared for the possibility that none of it may be online. Or some may be, and some may not. In addition to searching on the Internet, you also need to make best friends with the reference librarian(s) in your local or college library.

http://www.sou.edu/library/searchtools/
At this webpage, you can go immediately to the search sites (first three columns across the top) -- or even better you can scroll down until you see the section called HOW TO SEARCH THE INTERNET. Those are the links to start with. You'll not only learn how to come up with good search terms, but also how to evaluate the webpages you get as results. Some will be good and others will be garbage. You need to know how to tell the difference.

My favorite way to search is to go to Google's advanced search page
< http://www.google.com/advanced_search?hl=en > and put my search words or phrases into the first or second search box (either "all the words" or "exact phrase"). However, there many other strategies for searching you can use, and the HOW TO SEARCH THE INTERNET section will help you best.

Learning HOW to use Google or other search engines can save you time and help you learn to find information efficiently. Here are some websites that can teach you how:

http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/FindInfo.html

http://www.sou.edu/library/searchtools/searchtips.html

http://www.pandia.com/goalgetter/index.html

http://websearch.about.com/mbody.htm?once=true&COB=home&PM=112_100_T

... and one to help you judge whether a particular website's information is worth your time:

http://www.sou.edu/library/searchtools/evaluate.html

Happy searching.

=)http://hanlib.sou.edu/searchtools/

Sra

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