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1. ### How many particles in the universe given density and radius of universe?

...7e26)^3 m^3; so the total number of p, n, and e for 9 particles/m^3 is N = 9*V = 9*(4/3)*pi()*(1.7e26)^3 = 1.85216E+80 p, n, and e. Give or take...

2 Answers · Science & Mathematics · 01/09/2013

2. ### Question is on bottom, Help me!?

... assume the initial velocity, v(o) , is zero and the final...8)^2 F = 23 N-m That's only about... to be on the chess team, not shot-putting. ...probably more accurate, but still pretty whimpy.

1 Answers · Science & Mathematics · 07/09/2010

3. ### What is the acceleration due to gravity?

94.6 km/h = 26.3 m/s Centripetal force f = mV²/r where V is the tangental velocity r is radius of circle F = m(26.3...

1 Answers · Science & Mathematics · 26/10/2009

4. ### Force, Energy, Momentum question.?

...both have equal momenta. Which is pretty much the same thing you've said in #2 (you'...more intuitive though). And lastly, since: KE = m*v*v/2, and p = mv, you can say: KE = p*p/2m...

1 Answers · Science & Mathematics · 09/05/2011

5. ### help me to solve this physics problem:(?

... as positive. U² = 55.02323 U = 7.42m/s It's pretty simple, merely tedious. Hope this helps=)

1 Answers · Science & Mathematics · 20/09/2008