Practise

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Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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2730 questions · page 22 of 137 · choose a topic above to narrow them down

SA-9702-MP2-0041 markL1 FoundationCalculatorX-ray production

X-rays are produced in an X-ray tube when

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SA-9702-MP2-0051 markL1 FoundationCalculatorX-ray production

The accelerating voltage of an X-ray tube is doubled. The minimum X-ray wavelength

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SA-9702-MP3-0031 markL1 FoundationCalculatorTracers

The radioactive tracer used in PET scanning decays by

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SA-9702-MP3-0041 markL1 FoundationCalculatorAnnihilation

When a positron and an electron annihilate at rest, two photons are emitted in opposite directions because

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SA-9702-NP1-0031 markL1 FoundationCalculatorMass defect

Calculate the energy equivalent of

1.0

g of mass, in units of

10^{13}

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SA-9702-NP1-0041 markL1 FoundationCalculatorMass defect

The binding energy of a nucleus is

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SA-9702-NP1-0051 markL1 FoundationCalculatorBinding energy curve

The binding energy per nucleon is greatest for nuclei with nucleon numbers near

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SA-9702-NP2-0011 markL1 FoundationCalculatorHalf-life

A nuclide has a half-life of

8.0

days. Calculate its decay constant, in units of

10^{-6}

s⁻¹.

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SA-9702-NP2-0021 markL1 FoundationCalculatorActivity

A sample has

5.0\times10^{20}

undecayed nuclei and decay constant

1.0\times10^{-6}

s⁻¹. Calculate its activity, in units of

10^{14}

Bq.

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SA-9702-NP2-0041 markL1 FoundationCalculatorActivity

Radioactive decay is described as spontaneous because

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SA-9702-NP2-0051 markL1 FoundationCalculatorActivity

Evidence that radioactive decay is random comes from

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SA-9702-OS1-0011 markL1 FoundationCalculatora = −ω²x

An oscillator obeys

a=-49x

. Calculate its period.

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SA-9702-OS1-0021 markL1 FoundationCalculatora = −ω²x

For the oscillator with

a=-49x

and amplitude

0.020

m, calculate the maximum acceleration.

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SA-9702-OS1-0031 markL1 FoundationCalculatorOscillation terms

A spring oscillates at

2.5

Hz. Calculate its angular frequency.

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SA-9702-OS1-0041 markL1 FoundationCalculatora = −ω²x

An object moves with simple harmonic motion when its acceleration is

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SA-9702-OS2-0011 markL1 FoundationCalculatorVelocity in SHM

An oscillator has

\omega=10

rad s⁻¹ and amplitude

0.050

m. Calculate its maximum speed.

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SA-9702-OS2-0041 markL1 FoundationCalculatorEnergy in SHM

The amplitude of an oscillator is tripled. State the factor by which its total energy increases.

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SA-9702-OS2-0051 markL1 FoundationCalculatorEnergy in SHM

At the equilibrium position of an undamped oscillator, the energy is

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SA-9702-OS3-0021 markL1 FoundationCalculatorDamping

Critical damping is when the system

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SA-9702-OS3-0031 markL1 FoundationCalculatorResonance

Resonance occurs when

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