Homework Answers
Answer :
b) A free neutron does decay into a proton, an electron and an anti electron neutrino. The mean lifetime of a neutron is 15 mins approx and the half life is 10 mins. So a free neutron would decay in 15 mins but in a nucleus they are bounded and stablised by nuclear force which keeps them from decaying. therefore, free neutron does decay into a proton, an electron and an anti electron neutrino.
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b) Why does a free heutron not decay into electron and a positron? In to a...
) The ‘carrier' of the weak interaction are the massive weak osons W and the z...
) The ‘carrier' of the weak interaction are the massive weak osons W and the z (mzc2 93 GeV, mwc2 82 GeV) which c implies that the weak interactions have a short range. Prove that
Let's do a little particle physics. Back in the '9os there was a large electron-positron collider...
Particle Physics
Let's do a little particle physics. Back in the '9os there was a large electron-positron collider at CERN in Geneva, Switzerland, called the "Large electron-positron collider," or LEP for short. (This collider was broken down and rebuilt into an even larger one that runs to this day, called the "Large hadron collider" or LHC.) It was LEP that discovered the W and Z bosons, which mediate weak nuclear processes like the beta decay of free neutrons Anyway, near...
the information for the question is below 11) A neutral pion at rest decays into an...
the information for the question is below
11) A neutral pion at rest decays into an electron/positron pair. Using the mass information given in problem (4) find the gamma factor for either the electron or positron (they are equal). Remember that the electron and positron have the same mass. 12) What is the speed of the electron in (11)? (Please answer in terms of c). 4) (30 points) A free Proton (not in a nucleus) is not known to decay....
1.Describe what happens to a carbon-11 atom when it undergoes positron emission. The decay of a...
1.Describe what happens to a carbon-11 atom when it undergoes
positron emission.
The decay of a carbon-11 atom _____(options;changes a nuetron
into proton, changes proton into neutron, is hit with a neutron,
reconfigures its protons and neutrons) and this causes it to
emit______(options; a negatively charged electron sized particle, a
positively charged electron sized partticle, two atoms and several
neutrons, two neutrons and two protons)
2.An atom undergoes radioactive decay according to this
equation:
___.
What is the identity of...
19. An isotope with a high value of N/Z will end to decay through: a. alpha decay b. beta decay C. positron decay d. electron capture e. gamma decay 20.Identify the missing species in the followi...
19. An isotope with a high value of N/Z will end to decay through: a. alpha decay b. beta decay C. positron decay d. electron capture e. gamma decay 20.Identify the missing species in the following nuclear transmutation: 246Cm +12C 41n+? a. 254No b. 258No c. 238Cf d. 238Th e. none of the above 21. The isotope 42Sc is unstable because: a. the number of neutrons is too large in relation to the number of protons b. the number of...
Answer is D but why? 8. The drawing shows the circular paths of an electron and...
Answer is D but why?
8. The drawing shows the circular paths of an electron and a proton. These particles have the same charge magnitudes, but the proton is more massive. They travel at the same speed in a uniform magnetic field B, which is dir- ected into the page everywhere. Which particle follows the larger circle, and does it travel clockwise or counterclockwise? B (into page) QUESTIONS (a) (b) (c) Particle electron electron Direction of Travel clockwise counterclockwise proton...
I. Calculation Section Consider the decay of-- into π- and N, Assume : decays froln rest...
I. Calculation Section Consider the decay of-- into π- and N, Assume : decays froln rest and calculate the kinetic energies of the π and Ao and then their speecls. You will need to look up the rest masses of the three particles in your textbook (or on Enforce momentum conservation and energy conservation. Use the relativistic formula- tion (Hint: The algebraic approach I used in class was to write down the energy conservation condition and the momentum conservation condition,...
1 1 J (Joule) corresponds to: A: 1.602E-19 eV B: 6.242E18 eV C: 6.242E-20 eV D: 1.602E10 GeV 2 A...
1 1 J (Joule) corresponds to: A: 1.602E-19 eV B: 6.242E18 eV C: 6.242E-20 eV D: 1.602E10 GeV 2 A force acting on an object always changes its: A: Total energy B: Kinetic energy C: Rest energy D: Momentum 3 Momentum is a product of: A: Rest mass and velocity B: Relativistic mass and velocity C: Kinetic energy and velocity D: Relativistic mass and total energy 4 Relativistic mass as a function of velocity is: A: Linearly increasing B: Linearly decreasing C: Non-linearly increasing D: Non-linearly decreasing 5 The Lorentz-factor (g) is a ratio of: A: Total...
Add the following questions to the final report: a) Why does the carbomethoxy group directs the...
Add the following questions to the final report: a) Why does the carbomethoxy group directs the reaction to positions that are meta to it? b) Why the formation of dinitrobenzaote is substantially disfavored ? c) Would you expect small amounts of the ortho and para substituted product? How would you remove them if they are formed ? d) Why does water have a retarding effect on the nitration ? e) Explain why Benzene has lower reactivity in electrophilic addition reactions...
Question 1 (a) An experiment is performed to study the inclusive kº production in the reaction...
Question 1 (a) An experiment is performed to study the inclusive kº production in the reaction p + p → Rº + X, where x denotes any particle system (one or more particles). (1) What are the values of its characteristic quantum numbers (Q.B, L, S)? [6 Marks] (ii) What is the minimum number of particles in X? [2 Marks] (b) Explain why the K'and Kº mesons are not eigenstates of the CP operator. [7 Marks] (0) Write down the...
) The ‘carrier' of the weak interaction are the massive weak osons W and the z (mzc2 93 GeV, mwc2 82 GeV) which c implies that the weak interactions have a short range. Prove that
Particle Physics
Let's do a little particle physics. Back in the '9os there was a large electron-positron collider at CERN in Geneva, Switzerland, called the "Large electron-positron collider," or LEP for short. (This collider was broken down and rebuilt into an even larger one that runs to this day, called the "Large hadron collider" or LHC.) It was LEP that discovered the W and Z bosons, which mediate weak nuclear processes like the beta decay of free neutrons Anyway, near...
the information for the question is below
11) A neutral pion at rest decays into an electron/positron pair. Using the mass information given in problem (4) find the gamma factor for either the electron or positron (they are equal). Remember that the electron and positron have the same mass. 12) What is the speed of the electron in (11)? (Please answer in terms of c). 4) (30 points) A free Proton (not in a nucleus) is not known to decay....
1.Describe what happens to a carbon-11 atom when it undergoes
positron emission.
The decay of a carbon-11 atom _____(options;changes a nuetron
into proton, changes proton into neutron, is hit with a neutron,
reconfigures its protons and neutrons) and this causes it to
emit______(options; a negatively charged electron sized particle, a
positively charged electron sized partticle, two atoms and several
neutrons, two neutrons and two protons)
2.An atom undergoes radioactive decay according to this
equation:
___.
What is the identity of...
19. An isotope with a high value of N/Z will end to decay through: a. alpha decay b. beta decay C. positron decay d. electron capture e. gamma decay 20.Identify the missing species in the following nuclear transmutation: 246Cm +12C 41n+? a. 254No b. 258No c. 238Cf d. 238Th e. none of the above 21. The isotope 42Sc is unstable because: a. the number of neutrons is too large in relation to the number of protons b. the number of...
Answer is D but why?
8. The drawing shows the circular paths of an electron and a proton. These particles have the same charge magnitudes, but the proton is more massive. They travel at the same speed in a uniform magnetic field B, which is dir- ected into the page everywhere. Which particle follows the larger circle, and does it travel clockwise or counterclockwise? B (into page) QUESTIONS (a) (b) (c) Particle electron electron Direction of Travel clockwise counterclockwise proton...
I. Calculation Section Consider the decay of-- into π- and N, Assume : decays froln rest and calculate the kinetic energies of the π and Ao and then their speecls. You will need to look up the rest masses of the three particles in your textbook (or on Enforce momentum conservation and energy conservation. Use the relativistic formula- tion (Hint: The algebraic approach I used in class was to write down the energy conservation condition and the momentum conservation condition,...
Add the following questions to the final report: a) Why does the carbomethoxy group directs the reaction to positions that are meta to it? b) Why the formation of dinitrobenzaote is substantially disfavored ? c) Would you expect small amounts of the ortho and para substituted product? How would you remove them if they are formed ? d) Why does water have a retarding effect on the nitration ? e) Explain why Benzene has lower reactivity in electrophilic addition reactions...
Question 1 (a) An experiment is performed to study the inclusive kº production in the reaction p + p → Rº + X, where x denotes any particle system (one or more particles). (1) What are the values of its characteristic quantum numbers (Q.B, L, S)? [6 Marks] (ii) What is the minimum number of particles in X? [2 Marks] (b) Explain why the K'and Kº mesons are not eigenstates of the CP operator. [7 Marks] (0) Write down the...
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