Recent content by Meganwright

Homework Statement A molecular cloud 0.2 light years across rotates once every 1.4 ×107 years. If it were to collapse to the size of our Sun, how long would it take to rotate once if it conserved angular momentum given by mvr, where m is mass, v is the circular rotation speed and r is the...

Homework Statement A cloud consists of 8 solar masses of hydrogen gas (H2). Its temperature is 20 K and its radius is 0.6 light years. Will it collapse? Homework Equations Mj=3kTR/2Gm 3/2kT<GMm/R The Attempt at a Solution m=2 x 1.67 x 10^-27 G=6.67 x 10^-11 k=1.38 x 10^-23 T=20...

So far I'm using the formula 3/2kT <GMm/R And (3KT/2Gm) x k >mj I'm substituting m=2.167x10^-27 G=6.67x10^-11 K=1.38x10^-23 T=20 R=0.6 However I'm not sure what it is exactly that I'm gaining from using these formulae? I'm getting that (3kT/2Gm) x R = 1.115011357 x 10^15 ? I'm aiming to...

Oh I see! Thankyou so much! I don't suppose you have time to look at my other 2 posts and help me out do you? I'm struggling with applying jeans mass?

Homework Statement A cloud consists of 8 solar masses of hydrogen gas (H2). Its temperature is 20 K and its radius is 0.6 light years. Will it collapse? Homework Equations jeans mass [b]3. The Attempt at a Solution [/b I've tried to use jeans mass to solve this however I am finding...

Homework Statement A Sun-like star may convert some carbon 12C (nuclear mass 1.998 ×10-26 kg) to oxygen 16O (nuclear mass 2.657 ×10-26 kg) towards the end of its life. Approximately how much energy is released per fusion reaction? Homework Equations e=mc2 c+he = o + energy The...