Question 1

210Bi (an isotope of bismuth) has a half-life of 5.0 days. The time for three-quarters of a sample of 210Bi to decay is:

Accepted Answer

A)  2.5 days 
B)  3.75 days 
C)  10 days 
D)  15 days 
E)  20 days 
A)  2.5 days 
B)  3.75 days 
C)  10 days 
D)  15 days 
E)  20 days

Question 2

1 atomic mass unit is about:

Accepted Answer

A)  1.66 *10-31 kg 
B)  9.11 * 10-31 kg 
C)  1.66 *10-27 kg 
D)  9.11 *10-27 kg 
E)  1.66 * 10-25 kg 
A)  1.66 *10-31 kg 
B)  9.11 * 10-31 kg 
C)  1.66 *10-27 kg 
D)  9.11 *10-27 kg 
E)  1.66 * 10-25 kg

Question 3

An atom of 235U (Z = 92) disintegrates to 207Pb (Z = 82) with a half-life of about a billion years by emitting seven alpha particles and ______ $\beta$- particles:

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
E)  7 
A)  3 
B)  4 
C)  5 
D)  6 
E)  7

Question 4

Magic nucleon numbers are associated with:

Accepted Answer

A)  nuclei that decay via alpha decay 
B)  nuclei that decay via beta decay 
C)  nuclei that have equal numbers of protons and neutrons 
D)  nuclei that are relatively stable 
E)  nuclei that fission readily 
A)  nuclei that decay via alpha decay 
B)  nuclei that decay via beta decay 
C)  nuclei that have equal numbers of protons and neutrons 
D)  nuclei that are relatively stable 
E)  nuclei that fission readily

Question 5

A typical mammogram X-ray results in a radiation dose equivalent of 70 mrem. What absorbed dose does this correspond to?

Accepted Answer

A)  70 mGy 
B)  70 Sv 
C)  7.0 Gy 
D)  0.70 Sv 
E)  0.70 Gy 
A)  70 mGy 
B)  70 Sv 
C)  7.0 Gy 
D)  0.70 Sv 
E)  0.70 Gy

Question 6

The binding energy of a nucleus is the energy that must be supplied to:

Accepted Answer

A)  remove a nucleon 
B)  remove an alpha particle 
C)  remove a beta particle 
D)  separate the nucleus into its constituent nucleons 
E)  separate the nucleus into a collection of alpha particles 
A)  remove a nucleon 
B)  remove an alpha particle 
C)  remove a beta particle 
D)  separate the nucleus into its constituent nucleons 
E)  separate the nucleus into a collection of alpha particles

Question 7

Some alpha emitters have longer half-lives than others because:

Accepted Answer

A)  their alpha particles have greater mass 
B)  their alpha particles have less mass 
C)  their barriers to decay are higher and wider 
D)  their barriers to decay are lower and narrower 
E)  their decays include the emission of a photon 
A)  their alpha particles have greater mass 
B)  their alpha particles have less mass 
C)  their barriers to decay are higher and wider 
D)  their barriers to decay are lower and narrower 
E)  their decays include the emission of a photon

Question 8

The graph shows the decay rate R as a function of the time t for three radioactive samples. Rank the samples according to their half-lives, shortest to longest.

Accepted Answer

A)  1, 2 ,3 
B)  1, 3, 2 
C)  2, 1, 3 
D)  2, 3, 1 
E)  3, 1, 2 
A)  1, 2 ,3 
B)  1, 3, 2 
C)  2, 1, 3 
D)  2, 3, 1 
E)  3, 1, 2

Exam 42: Nuclear Physics

210Bi (an isotope of bismuth) has a half-life of 5.0 days. The time for three-quarters of a sample of 210Bi to decay is:

1 atomic mass unit is about:

An atom of 235U (Z = 92) disintegrates to 207Pb (Z = 82) with a half-life of about a billion years by emitting seven alpha particles and ______ β\betaβ - particles:

Magic nucleon numbers are associated with:

A typical mammogram X-ray results in a radiation dose equivalent of 70 mrem. What absorbed dose does this correspond to?

The binding energy of a nucleus is the energy that must be supplied to:

Some alpha emitters have longer half-lives than others because:

The graph shows the decay rate R as a function of the time t for three radioactive samples. Rank the samples according to their half-lives, shortest to longest.

Measurement

Motion Along a Straight Line

Vector

Motion in Two and Three Dimensions

Force and Motion I

Force and Motion II

Kinetic Energy and Work

Potential Energy and Conservation of Energy

Center of Mass and Linear Momentum

Rotation

Rolling, Torque, and Angular Momentum

Equilibrium and Elasticity

Gravitation

Fluids

Oscillations

Waves I

Waves II

Temperature, Heat, and the First Law of Thermodynamics

The Kinetic Theory of Gases

Entropy and the Second Law of Thermodynamics

Electric Charge

Electric Fields

Gauss Law

Electric Potential

Capacitance

Current and Resistance

Circuits

Magnetic Fields

Magnetic Fields Due to Currents

Induction and Inductance

Electromagnetic Oscillations and Alternating Current

Maxwells Equations; Magnetism of Matter

Electromagnetic Waves

Images

Interference

Diffraction

Relativity

Photons and Matter Waves

More About Matter Waves

All About Atoms

Conduction of Electricity in Solids

Energy From the Nucleus

Quarks, Leptons, and the Big Bang

Filters

²¹⁰Bi (an isotope of bismuth) has a half-life of 5.0 days. The time for three-quarters of a sample of ²¹⁰Bi to decay is:

An atom of ²³⁵U (Z = 92) disintegrates to ²⁰⁷Pb (Z = 82) with a half-life of about a billion years by emitting seven alpha particles and ______ $\beta$ ^- particles: