DP Physics (last assessment 2024)
Question 17N.3.HL.TZ0.20a
| Date | November 2017 | Marks available | [Maximum mark: 4] | Reference code | 17N.3.HL.TZ0.20a |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Outline | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 4]
17N.3.HL.TZ0.20a
(a)
The Sun is a second generation star. Outline, with reference to the Jeans criterion (MJ), how the Sun is likely to have been formed.
[4]
Markscheme
interstellar gas/dust «from earlier supernova»
gravitational attraction between particles
if the mass is greater than the Jean’s mass/Mj the interstellar gas coalesces
as gas collapses temperature increases leading to nuclear fusion
MP3 can be expressed in terms of potential and kinetic energy
