DP Physics (first assessment 2025)
Question 21M.2.SL.TZ1.7
| Date | May 2021 | Marks available | [Maximum mark: 4] | Reference code | 21M.2.SL.TZ1.7 |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Apply, Outline | Question number | 7 | Adapted from | N/A |
7.
[Maximum mark: 4]
21M.2.SL.TZ1.7
Conservation of energy and conservation of momentum are two examples of conservation laws.
(a)
Outline the significance of conservation laws for physics.
[1]
Markscheme
they express fundamental principles of nature ✓
allow to model situations ✓
allow to calculate unknown variables ✓
allow to predict possible outcomes ✓
allow to predict missing quantities/particles ✓
allow comparison of different system states ✓
(b)
When a pi meson π- (du̅) and a proton (uud) collide, a possible outcome is a sigma baryon Σ0 (uds) and a kaon meson Κ0 (ds̅).
Apply three conservation laws to show that this interaction is possible.
[3]
Markscheme
three correct conservation laws listed ✓
at least one conservation law correctly demonstrated ✓
all three conservation laws correctly demonstrated ✓
