PHYSICS CONVERSION (STANDARD FORM)

• bonkysleuth

  20 Jan 08, 11:52

  0.5µ g2 Mm-3 = ___ kg2 cm-3
  
  My answer's 5 X 10-3 but my brother got it as 5 X 10-7.
  
  NOTE : the '-3', '-7' g'2' and cm'-3' all refers to powers.
  
  Thanks.
• eagle

  20 Jan 08, 15:21

  Originally posted by bonkysleuth:

  0.5µ g2 Mm-3 = ___ kg2 cm-3
  
  My answer's 5 X 10-3 but my brother got it as 5 X 10-7.
  
  NOTE : the '-3', '-7' g'2' and cm'-3' all refers to powers.
  
  Thanks.

  1 g^2 = 1g * 1g = 0.001kg * 0.001kg = 1* 10^-6 kg^2
  
  1 mm3 = 1mm * 1mm * 1mm = 0.01cm * 0.01cm * 0.01cm = 1 * 10^-6 cm3
  similarly, 1mm^-3 will be 1* 10^-6 cm^-3
  
  Then 0.5µ = 0.5 * 10^-6
  
  so total is 0.5 * 10^-18 = 5 * 10^-17
• SBS261P

  20 Jan 08, 15:28

  Originally posted by eagle:

  1 mm3 = 1mm * 1mm * 1mm = 0.01cm * 0.01cm * 0.01cm = 1 * 10^-6 cm3
  similarly, 1mm^-3 will be 1* 10^-6 cm^-3

  shld be 1mm x 1mm x 1mm = 0.1cm x 0.1cm x 0.1cm = 1 x 10^-3 cm3
  
  

  Originally posted by eagle:

  so total is 0.5 * 10^-18 = 5 * 10^-17

  shld be 10^-19 at the end...
  
  but if u take ur previous mistake into account it's 5 x 10^-16
  
  cheers
• eagle

  20 Jan 08, 16:52

  good work SBS261P.
  Keep it up!