# Thread: Basic math - currious if I am handling it correctly

1. ## Basic math - currious if I am handling it correctly

little unsure on some exponent type math I did...

when I did the volume I took (4/3)(pie)(r)^3 basically just plugged in (1.2X10^-15) into my figures and it kicked out something approaching:
volume = - 2.44 X 10^7

I then divided Mass/Volume:

(1.67X10^-27)/(-2.44X10^7) = 6.84X10^-35

am I using these exponents correctly in scientific notation and getting the approximate right answers?

Thanks

Brian

2. Originally Posted by wilder7bc
little unsure on some exponent type math I did...

when I did the volume I took (4/3)(pie)(r)^3 basically just plugged in (1.2X10^-15) into my figures and it kicked out something approaching:
volume = - 2.44 X 10^7

I then divided Mass/Volume:

(1.67X10^-27)/(-2.44X10^7) = 6.84X10^-35

am I using these exponents correctly in scientific notation and getting the approximate right answers?

Thanks

Brian
Please, if you would be so kind...Cite the given problem.

3. Originally Posted by VonNemo19
Please, if you would be so kind...Cite the given problem.

Ok I had typed it up once but took it out so I didnt have to much information, I didnt want to clutter up someone else brain as my brain remains cluttered lol

A proton which is the Nucleus of a hydrogen atom can be modeled as a sphere with a diameter of 2.4 fm and a mass of 1.67X10^-27kg

(a). Determine the density of the proton

(b). state how your answer to part (a) compares with the density of Osmium, given in Table 14.1 (that was Osminum 22.6X10^3)

My formulas

Density = P = M/V Mass per unit volume

Volume of sphere = (4/3)(pi)(r)^3

my data:

Proton
Mass 1.67X10^-27kg
Diameter 2.4fm = (if I did scientific notation correctly) 2.4X10^-15

Osminum
Mass 22.6X10^3

I then plugged things in

(4/3)(pi)(1.2X10^-15)^3 = -2.44X10^7

Then divided mass by volume

(a). (1.67X10^-27)/(2.44X10^7) = 6.84X10^-35

(b). Density of proton is way way way smaller than Osminum

Ugggg.... this stuff is so hard to type which is why I asked a about a program in software part... maybe I should start trying to use word to do all this I just get slowed down a ton hunting for symbols!

Thanks,

Brian