Physics Speed-Run
Practise physics recall in a timed round, or switch to an untimed study session. Every attempt is available for review when the round ends.
What you will practise
- Recall units, energies and decay concepts.
- Recognise the principle behind the calculation.
- Review missed answers without time pressure.
Set up your round
78 questions available
A smaller pool gives a shorter round. In timed mode, the clock sets the round length. Prompt length is a study preference, not a validated difficulty rating.
Before you begin
Open an example to revisit its answer and reasoning.
⁹⁹ᵐTc principal γ energy?
Answer
140 keV
Reasoning140 keV.
Photons detected per PET annihilation?
Answer
Two (511 keV)
ReasoningTwo 511 keV photons ~180° apart.
Half-life of ¹⁸F?
Answer
~110 min
Reasoning≈110 minutes.