- #1
rwooduk
- 762
- 59
... figure it out
1. if a typical supernova ejects 2 solar masses of matter at a root mean speed of 7000km/s, how much energy is available in the expanding remnant?
2. Homework Equations : unsure
3. The Attempt at a Solution :
E = 1/2 mv^2
then divide by the volume, 4/3(pi)r^3
do not get the correct answer of 6.52*10^-14 J/m^3
the problem is i do not know how big the remnant is so if i find the total energy what do i divide by, there is no time given to work out the expansion, but lost with this one, any direction appreciated!
thanks in advance
1. if a typical supernova ejects 2 solar masses of matter at a root mean speed of 7000km/s, how much energy is available in the expanding remnant?
2. Homework Equations : unsure
3. The Attempt at a Solution :
E = 1/2 mv^2
then divide by the volume, 4/3(pi)r^3
do not get the correct answer of 6.52*10^-14 J/m^3
the problem is i do not know how big the remnant is so if i find the total energy what do i divide by, there is no time given to work out the expansion, but lost with this one, any direction appreciated!
thanks in advance