Homework Help: Chemistry

Posted by Jecce on Monday, July 21, 2008 at 5:10pm.

The circumference of the earth is 25,000 mi at the equator. What is the circumference in kilometers? in meter?

-- I really don't understand how to concer this. Please help!

Chemistry - Ms. Sue, Monday, July 21, 2008 at 5:15pm
1 mile = about 1.61 km.

Multiply: 25,000 * 1.61 = ? km

1 km = 1,000 m

Multiply your km answer by 1,000.
- Chemistry - Ms. Sue, Monday, July 21, 2008 at 5:18pm
  To be more accurate for the meters --
  
  1 mile = 1 609.344 meters
  
  Multiply: 25,000 * 1,609.344 = ? m
- Chemistry - Jecce, Monday, July 21, 2008 at 5:23pm
  ok um im still a little confused.
  
  is kg and km the same thing as kilometers?
  
  and...
  are those the steps you gave me to figure it out?
Chemistry - Ms. Sue, Monday, July 21, 2008 at 5:33pm
kg = kilogram (measures mass)
km = kilometer (measures distance)

Yes. Follow the steps I gave you to find the answers.
- Chemistry - Jecce, Monday, July 21, 2008 at 5:37pm
  thanks for clearing that up for me!
  
  when i multiplied km by 1000 i ended up getting 40250000
  
  but when i mutiplied 25000x1609.344 i ended up getting 40233600
  
  Which one is the right answer?
Chemistry - Ms. Sue, Monday, July 21, 2008 at 5:43pm
The more accurate answer is 40,233,600 meters. But many teachers would probably accept the other answer, also.
- Chemistry - Jecce, Monday, July 21, 2008 at 5:45pm
  Thank you so much!
  You really did help me !
  - Chemistry - Ms. Sue, Monday, July 21, 2008 at 5:56pm
    You're very welcome.

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