- Joined
- May 21, 2010
- Messages
- 496
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#20 on the PS section.
I've done the math like 3 times and for some reason I am not getting 10^2 kg.
its asking for what mass is needed to cause a 1% change. ie (.01)
if we re-arrange, we get F= (delta L)(E)(A)
ma= (.01)(2 x 10^8)( 5 x 10^-2 m2)
m=(.01)(2 x 10^8) ( 5 x 10^-2 m2)/ 10 = 10 x 10^3 kg.
where did I go wrong. I see that the area was initially given in cm^2 and i thought i converted to meter correctly.
I've done the math like 3 times and for some reason I am not getting 10^2 kg.
its asking for what mass is needed to cause a 1% change. ie (.01)
if we re-arrange, we get F= (delta L)(E)(A)
ma= (.01)(2 x 10^8)( 5 x 10^-2 m2)
m=(.01)(2 x 10^8) ( 5 x 10^-2 m2)/ 10 = 10 x 10^3 kg.
where did I go wrong. I see that the area was initially given in cm^2 and i thought i converted to meter correctly.
