Please need a methamitician or physic guru to helpme with this
Responses (2)
Sorry, I screwed it up. Let's do it again:
5000 = 5.0*10^3
1J = 1.0*10^-6MJ
1g = 1.0*10^-3kg
1cm = 1.0*10^-2m
Let's bring the 10^-3kg upstairs. Well, dividing is just the same as multiplying the inverse:
5.0*10^3*10^-6MJ * 1.0*10^3kg * 1.0*10^-2m
Now we have to add up the exponents:
3 + (-6) + 3 + (-2) = -2
Not forgetting the square of the last unit itself -- it's m^2, not m -- your converted term is:
(5.0*10^-2MJ) / kg * m^2
man, all of your answers are wrong :( I got the right answer, its 50,000 J / kg * m^2
sorry i meant to type in , 50 000 MJ/kg.m^2?
Parentheses would have helped to disambiguate your question:
"Convert this unit 5000 J / (g * cm^2) to MJ / (kg * m^2)."
Then the solution is:
(5*10^3 * 10^-6 MJ) / (10^-3 kg * 10^-4 m^2) =
5*10^-3 MJ / (10^-7 * kg * m^2) =
5*10^4 MJ / (kg * m^2) =
50000 MJ / (kg * m^2)
Which is exactly what you said.
Well, at least what you meant to say. ;)
Sorry, the first answer was right.
Because
1cm * 1cm = 1cm^2 . Thus
0.01m * 0.01m = 0.0001m^2 = 1.0*10^-4m^2.
Therefore, the sum of the exponents is
3 + (-6) + 3 + (-4) = -4
and the result is:
(5.0*10^-4MJ) / kg * m^2 = 0.0005MJ / kg * m^2