U3T1
U3T2
U4T1
U4T2
U4T3
100
Resolve a vector of 50 N at 30° above the horizontal into its vertical component.
25 N
100
Which of the following waves has the highest frequency?
(a) Infrared
(b) X-rays
(c) Visible light
(d) Radio waves
(b) X-rays
100
Describe an example of a natural phenomenon that cannot be explained by Newtonian physics
Muons in the atmosphere
100
Define the concept of a photon.
Light quanta
100
Recall the six types of quarks.
up, down, charm, strange, top, bottom
200
A car travels 60 km east then 80 km north. Determine the resultant displacement using vector addition.
s = 100 km NE
200
A 2 m wire carries a current of 3 A perpendicular to a magnetic field of strength 0.4 T. Calculate the force on the wire.
F = 2.4 N
200
A rod has a proper length of 2.0 m. What length would an observer measure if the rod moves past at 0.6c?
L = 1.6 m
200
Calculate the energy of a photon with wavelength 500 nm.
E = 3.9756 x 10-19 J
200
Recall the six types of leptons.
electron, electron neutrino, tau, tau neutrino, muon, muon neutrino
300
A car travels around a circular track of radius 50 m in 20 s. Find its average speed.
v = 15.7 m/s
300
A charge of +5.0 × 10⁻⁶ C is placed in a uniform electric field of 2000 N/C. Calculate the force acting on it.
F = 0.01 N
300
A spacecraft moves at 0.8c relative to Earth. An astronaut measures 10 s for an event inside the ship. Calculate the time measured by an observer on Earth.
t = 16.67 s
300
Find the momentum of a photon with wavelength 650 nm.
p = 1.019 x 10-27 kg m s-1
300
Recall the four gauge bosons and the forces they mediate.
Strong - gluon
Weak - W & Z boson
Electromagnetic - photon
400
Two masses of 1000 kg and 500 kg are separated by 10 m. Calculate the gravitational force between them.
F = 3.34 x 10-7 N
400
Two charges of +2.0 × 10⁻⁶ C and –3.0 × 10⁻⁶ C are separated by 0.2 m. Calculate the magnitude of the force between them.
F = 1.35 N
400
State the two postulates of special relativity.
1. The laws of physics are the same and can be stated in their simplest form in all inertial frames of reference.
2. The speed of light c is a constant, independent of the relative motion of the source.
400
A photon with wavelength 300 nm strikes a metal surface with work function 3.0 eV. Calculate the maximum kinetic energy of the emitted electrons.
Ek = 1.826 x 10-19 J
400
Contrast the fundamental forces experienced by quarks and leptons.
Quarks experience all forces. Leptons don't experience strong force.
500
Calculate the gravitational field strength at a distance of 2.0 × 10⁷ m from the centre of Earth (mass of Earth = 5.97 × 10²⁴ kg).
g = 9.95 x 10-1 m/s2
500
A coil with 100 turns and area 0.02 m² is placed in a magnetic field of 0.5 T. If the field is reduced to zero in 0.1 s, calculate the average EMF induced.
emf = -10 V
500
An astronaut travels at 0.85c for 10 years (as measured on Earth). How much time passes on the astronaut’s clock?
t = 18.98 years
500
Describe Bohr’s model of the atom and explain how it addressed the limitations of Rutherford’s model.
Dense nucleus with electron orbitals that decrease with energy the further away from nucleus.
By quantising shells, Bohr could address the spectral lines that appeared from hydrogen and the limitation of why electrons don't lose energy.
500
Use a Feynman diagram to represent an electron repelling another electron