Question 1

In the decay scheme   the blanks should contain

Accepted Answer

A) $\beta$+ and n 
B) $\beta$- and $v$ 
C) $\beta$- and p 
D) $\beta$+ and $v$ 
E) $\beta$+ and $\beta$-  
A) $\beta$+ and n 
B) $\beta$- and $v$ 
C) $\beta$- and p 
D) $\beta$+ and $v$ 
E) $\beta$+ and $\beta$-

Question 2

In this problem,Z is the atomic number,N is the neutron number,and A is the mass number.For stable isotopes with A greater than 44,as A increases,the ratio Z/N

Accepted Answer

A) remains the same. 
B) decreases. 
C) equals A - N. 
D) increases. 
E) None of these is correct. 
A) remains the same. 
B) decreases. 
C) equals A - N. 
D) increases. 
E) None of these is correct.

Question 3

At a particular time,a radioactive source A has a strength of 1.60 $\times$ 1011 Bq and a half-life of 15.0 d,and a second source B has a strength of 8.50 $\times$1011 Bq.Sources A and B have the same strength 45.0 d later.The half-life of B is

Accepted Answer

A) 0.19 d 
B) 8.3 d 
C) 2.8 d 
D) 5.4 d 
E) 28 d 
A) 0.19 d 
B) 8.3 d 
C) 2.8 d 
D) 5.4 d 
E) 28 d

Question 4

If,on the average,each fission reaction of 235U releases 200 MeV of energy,how many nuclei of 235U fission every second in a 200-MW reactor?

Accepted Answer

A) 6.3 $\times$ 1018  
B) 6.0 $\times$ 1023  
C) 1.0 $\times$ 1019  
D) 1.6 $\times$ 1019  
E) 2.7 $\times$ 1018  
A) 6.3 $\times$ 1018  
B) 6.0 $\times$ 1023  
C) 1.0 $\times$ 1019  
D) 1.6 $\times$ 1019  
E) 2.7 $\times$ 1018

Question 5

How many times larger is the volume of the nucleus 208Pb (Z=82)compared to the nucleus 40Ca (Z=20)?

Accepted Answer

A) 0.58 
B) 1.7 
C) 5.2 
D) 4.1 
E) 2.3 
A) 0.58 
B) 1.7 
C) 5.2 
D) 4.1 
E) 2.3

Question 6

A thermal neutron is a neutron whose kinetic energy is in thermal equilibrium with its surroundings.At room temperature this energy is approximately

Accepted Answer

A) 0.025 eV 
B) 0.050 eV 
C) 0.50 eV 
D) 5 eV 
E) 50 eV 
A) 0.025 eV 
B) 0.050 eV 
C) 0.50 eV 
D) 5 eV 
E) 50 eV

Question 7

The nuclear force is

Accepted Answer

A) short range and strongly dependent on the charge. 
B) short range but proportional to the Coulomb force. 
C) strongly dependent on the charge. 
D) very strong (compared with Coulomb forces)and long range. 
E) short range,charge independent,and very strong. 
A) short range and strongly dependent on the charge. 
B) short range but proportional to the Coulomb force. 
C) strongly dependent on the charge. 
D) very strong (compared with Coulomb forces)and long range. 
E) short range,charge independent,and very strong.

Exam 40: Nuclear Physics

In the decay scheme the blanks should contain

In this problem,Z is the atomic number,N is the neutron number,and A is the mass number.For stable isotopes with A greater than 44,as A increases,the ratio Z/N

At a particular time,a radioactive source A has a strength of 1.60 ×\times× 1011 Bq and a half-life of 15.0 d,and a second source B has a strength of 8.50 ×\times× 1011 Bq.Sources A and B have the same strength 45.0 d later.The half-life of B is

If,on the average,each fission reaction of 235U releases 200 MeV of energy,how many nuclei of 235U fission every second in a 200-MW reactor?

How many times larger is the volume of the nucleus 208Pb (Z=82)compared to the nucleus 40Ca (Z=20)?

A thermal neutron is a neutron whose kinetic energy is in thermal equilibrium with its surroundings.At room temperature this energy is approximately

The nuclear force is

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

The Electric Field I: Discrete Charge Distributions

The Electric Field Ii: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Elementary Particles and the Beginning of the Universe

Filters

At a particular time,a radioactive source A has a strength of 1.60 $\times$ 10¹¹ Bq and a half-life of 15.0 d,and a second source B has a strength of 8.50 $\times$ 10¹¹ Bq.Sources A and B have the same strength 45.0 d later.The half-life of B is

If,on the average,each fission reaction of ²³⁵U releases 200 MeV of energy,how many nuclei of ²³⁵U fission every second in a 200-MW reactor?