Need some help

[TheOne]

I'm having some trouble with a couple of the practice problems from a study guide. Can anyone help?

 

1.)The area of a telescope lens is 4149 mm2.

 

(a) What is the area of the lens in square feet (ft2)?

ft2

 

(b) If it takes a technician 65 s to polish 175 mm2, how long does it take her to polish the entire lens?

 

2.) The volume of a certain bacterial cell is 1.98 µm3.

(a) What is its volume in cubic millimeters (mm3)?

mm3

(b) What is the volume of 105 cells in liters (L)?

 

3.) Convert 709.5 meters to centimeters. Is this right? 7.095 x 10^2

 

4.) The concept of ____ indicates the ability of a person to measure consistently.

precision usefulness accuracy or statistically?

 

5.) Select the correct number of significant figures for 0.0230

one two three four five or six?

 

Could you explain how you get each one? Thanks

[jsatan]

NM, ignore me

[woelen]

Didn't you learn any arithmatic on primary school?

[TheOne]

You mean "arithmetic". Yeah I did spelling bee national champion. I also did those problems already but the only friends I have with the same study guide, I can't compare answers with because they don't prepare for any tests using practice problems. They just pray they get good grades. I still need some help.

[YT2095]

Mathematics is the least of the problems, more to the point What is this doing in Chemistry? LOL

[TheOne]

The class I'm in is a chemistry class. That I am sure of... I think... lol. Anyone know any of the problems?

[Klaynos]

Mathematics is the least of the problems, more to the point What is this doing in Chemistry? LOL

 

You see this is what I was saying on IRC the other day, we need a thread somewhere explaining what is what science. OK for somethings it can cross boundries (some people think electron energy levels should always be to do with chemistry), but I saw a post the other day that said they thought it was something to do with chemistry as they thought it was a specific force...

 

</rant>

[YT2095]

well... I COULD be wrong, this thread either belongs in here or Engineering, I this subforum is the most appropriate though

[CPL.Luke]

the problems all involve basic conversions, I can't giv you any advice other than to memerize a conversion table.

[Klaynos]

there are online conversion sites which will practically do the work for you, but that just removes all purpose of the exersise...

[Douglas]

4.) The concept of ____MOTOR AND PROCESS SKILLS____ indicates the ability of a person to measure consistently.

precision usefulness accuracy or statistically?

 

Try http://www.onlineconversion.com/area.htm

 

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