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A Level Physics > Particles > Flashcards

Particles Flashcards

Mock

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1
Q

How do you calculate specific charge?

A

Charge/mass

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2
Q

Why do large nuclei decay?

A

Range of strong nuclear force is very small so struggles to hold large nuclei together

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3
Q

How can you demonstrate how far alpha particles can travel?

A

Their tracks in a cloud chamber only go a few meters

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4
Q

What do particles and anti-particles have in common?

A

Equal but opposite charge, mass and same rest energy

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5
Q

What do baryons decay by?

A

Weak nuclear force

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6
Q

What do meason decay by?

A

The strong force

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7
Q

What force do hadrons feel

A

The strong force

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8
Q

What particles dont feel the strong force?

A

Leptons

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9
Q

How are strange particles created?

A

Via the strong interaction

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10
Q

When is strangeness conserved?

A

The strong force

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11
Q

What’s special about strange particles?

A

Always produced on pairs

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12
Q

What force do strange particles decay by?

A

Weak interaction

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13
Q

What quark changes in beta minus decay?

A

Neutron to proton so down to up quark

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14
Q

What is the baryon number of all quarks?

A

+1/3

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15
Q

What is an exchange particle?

A

A virtual particle that lets a force act between two particles in an interaction

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16
Q

When does electron capture occur?

A

An atom is proton rich

17
Q

What boson is exchanged in electron capture and collision?

A

Capture=W+

Collision=W-

18
Q

What experiences the weak force?

A

Hadrons and leptons

19
Q

Why do pions have an unusually long life?

A

They contain a strange quark

20
Q

When is strangness conserved?

A

Strong force

21
Q

What is the decay of a neutron?

A

n–> p+ e- + vê

A Level Physics (6 decks)

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