Mass–Energy, Nuclear Reactions & Radiation Evidence — Drills · Grade 12 Science
Chapter: Modern PhysicsWhat these drills covers
By the end of Mass–Energy, Nuclear Reactions & Radiation Evidence you should be able to:
- I can relate a consistent rest-mass difference to released energy.
- I can distinguish activity, detector counts, and absorbed dose.
2 questions, numeric and written answer, each with a worked explanation.
Vocabulary used: mass defect, absorbed dose, binding energy.
Problem 1
Mass difference.002u with 931.5 MeV/u gives what energy?
Hints
Write the relationship first; substitute with consistent units.
Answer and explanation
1.863 MeV
.002×931.5.
Problem 2
Why distinguish activity from dose?
Answer and explanation
Activity is source decay rate; dose depends on energy deposited per mass and exposure conditions.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.