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Physics 11 - Relativity and Nuclear Physics Review
This worksheet is an assignment to be completed on separate paper. Please be sure to round numerical
answers to 2 or 3 significant figures and include appropriate units.
Chapter 7: Relativity
1. Michelson and Morley revolutionized physics in 1887 when they discovered that ether does not exist.
What two assumptions can we draw based on this finding?
There is no preferred reference frame for light
The speed of light is constant (3x108 m/s) in every reference frame
2. A dragster, traveling at 2.0 x 108 m/s, completes a 400m (quarter-mile) run in 2.0 x 10
-6 s according to
observers in the stands
a) How long did the run take according to the driver?
b) How long is the track according the driver?
c) If the rest mass of the dragster is 1500 kg, what is the mass according to people in the stands?
a) 1.49x10-6
s b) 298 m c) 2.01x103 kg
3. A school bus and a segway move past each other at a relative velocity of 2.76 x 108 m/s. The person on
the segway measures the bus at 3.92 m long.
a) How long is the bus according to students on the bus?
b) How long did it take for the segway to pass according to students on the bus?
c) How long did it take to pass the bus according to the driver of the segway?
d) Who is correct?
a) 10m b) 3.62x10-8
s c) 1.42x10-8
s d) yes
4. A student running at 2.4 x 108 m/s throws a frisbee at 1.5 x 10
8 m/s. What is the velocity of the
frisbee relative to the ground?
2.79x108 m/s
5. At what velocity will an 8 kg cat be 14 kg? State your answer in βc and m/s.
0.82c, 2.46x108 m/s
6. How much energy could be produced from a 17 gram empty pop can if it was possible to
completely convert the mass into energy?
1.53x1015
J
7. What is the kinetic energy of a proton, mass 1.67 x 10-27
kg, travelling at 2.7 x 108 m/s?
1.503x10-10
J ���� 3.831x10-27
kg ���� 3.448x10-10
J ���� 1.95x10-10
J
Chapter 8: Nuclear Physics
1. In your own words, give brief definitions for,
a) Nucleons
b) Binding Energy
c) Transmutation
d) Half-Life
e) Fission
f) Fusion
2. Many elements are similar to Uranium in that they have many different isotopes. Each isotope of
Uranium has a slightly different mass. In terms of protons, electrons, and neutrons, what do the
different isotopes of Uranium all have in common, and what do they not have in common?
3. In a nuclear reactor, what are the functions of?
a) Moderators
b) Control Rods
4. List 2 advantages and 2 disadvantages of nuclear power.
5. Explain the ways radioactive isotopes with short half-lives can be both more and less dangerous
that isotopes with long half-lives.
6. Determine the missing numbers or symbols
a) Xe136 b) 40
19 ? c) 1
0 ? d) 0
1 ?−
7. Determine the binding energy of 65
29Cu in joules.
8. Determine the half life of a radioactive material that drops from a mass of 1200 grams to only 400
grams in 42 hours.
9. For both of these elements, Ra226
88 , Co60
27 , with the help of your data table,
a) Determine their number of protons, electrons, and neutrons
b) Determine what type of radioactive decay they follow
c) Write a balanced decay equation (do not worry about any γ rays)
d) Determine the “mass defect”
e) Determine the energy given off from each reaction
f) What is the elements half-life?