Quantum and Nuclear Physics

Question 1

What is nuclear binding energy?

What is the equation?

What is speed of light?

Answer 1

Min amount of energy equal to mass defect converted into energy needed to disassemble nucleus, is always positive

E = mc^2

C =3E8m/s

Question 2

What is the relationship of nuclear energy and gravitational electromagnetic energy?

Answer 2

Strong nuclear energy of proton-proton overcomes the natural repulsive electromagnetic energy two protons experience
- for this reason, some negligible amount of mass is converted into energy from formation of nucleus

Question 3

Why is a nucleus more stable than repelling two protons?

Answer 3

Binding energy released makes the energy lower in the nucleus, which is more stable

Question 4

what is the formula for wavelength with respect to plank’s constant?

Answer 4

Lambda = h / mv

Question 5

what is the equation fo kinetic energy with respect to plank’s constant and incident energy

Answer 5

E = Hf - work function

KE = E (incident) - E (work function)

Question 6

What is the relationship of frequency (Hz) t energy?

Answer 6

They are directly proportional

Question 7

What is the input, process, and output of nuclear fusion?

Answer 7

• large energy to fuse to nuclei

- make new element, neutron, and release a large amount of energy bc new element created is more stable (less energy)

Question 8

What is nuclear fission?

Answer 8

• splitting of larger nucleus into two smaller

- thus need to start with element with more protons/neutrons to be able to split

Question 9

What is the process of radioactive decay?

Answer 9

Breakdown of isotopes that releases radioactive material

Question 10

What is the product of gamma decay?

Answer 10

Release of higy energy photon - no mass/charge

Question 11

What is the product of alpha decay?

Answer 11

Release of 2 protons and 2 neutrons

Question 12

What is the difference of beta decay and positron emission?

Answer 12

No change in mass number, but change in atomic number

Beta decay: Neutron into proton and electron, electron is ejected

positron emission: proton into neutron and positron (opp charge but same mass of electron)

Question 13

What are the graphs of semi log of expo decay?

Answer 13

Linear neg slope

Question 14

What are two equations of Energy work function with frequency and speed of light?

Answer 14

E = hf

E = hc/lambda