Gravity and Motion
Kepler's second law of planetary motion states what?
Kepler's second law, also known as the law of equal areas, states that a line connecting a planet to the Sun sweeps out equal areas during equal intervals of time
Which law states that the force experienced by two charged particles is proportional to the product of charge and inversely proportional to the distance squared
Coulumb's Law
Name 6 quarks
up, down, charm, strange, top, bottom
Whose model is described as a nucleus with electrons orbiting at fixed energy levels
Bohr
What is proper time?
The time as recorded by the observer that is stationary to an event
To find the time taken during the flight of a projectile, what two formulas could be utilised?
Sy = 1/2gt^2 + Uyt
What is electromotive force?
A difference in potential that tends to give rise to a current
Name 4 bosons
W, Z, Gluon, Photon
What was the main issue with Rutherford's model?
It assumed a single distance for all electrons to orbit which means that will lose energy and eventually travel towards the nucleus as they lose speed
What is relativistic length?
The length recorded by an observer moving relative to an event.
On an incline plane, the force parallel to the incline is given by what formula?
F(parallel) = mgsin(theta)
Which hand rule would be used for finding the direction of a magnetic field generated by a solenoid?
Right hand grip rule
What is a meson
a quark and an antiquark
Name 1 experiment to verify the wave nature of light and 1 to verify the particle nature
wave - young's double slit
particle - photoelectric effect, black body curve, compton scattering
Name two postulates of special relativity
the laws of physics remain that same in any inertial reference frame
The speed of light is the same no matter what inertial reference frame it is recorded from
An object undergoes uniform circular motion in a path with a radius of r. Determine the effect on the radius if the mass of the object is doubled, but the centripetal force and velocity remain unchanged.
The radius will double
A charge of 2.8*10^-7 C experiences an electrostatic force of 5.2*10^-1 N when placed near a charge of 3.2*10^-7 C.
Calculate the distance between the two charges
0.039m
What 3 quantities must be conserved in a particle interaction?
Charge, lepton number and baryon number
A photoelectron with a kinetic energy of 2.5*10^-19 J is ejected when a photon with a frequency of 1.3*10^15 Hz is incident on the metal plate.
Calculate the threshold frequency of light required to eject the photoelectron from the metal plate.
9.2*10^14 Hz
Why can an object with mass not move at the speed of light?
According to the formula for relativistic momentum, as an object approached the speed of light it will approach an infinite amount of energy
A spacecraft is located between two large asteroids, Asteroid A and Asteroid B, that are 120km apart. Asteroid A's mass is approximately four times the mass of asteroid B. Determine the distance of the spacecraft from Asteroid B if it experiences no net gravitational force from the two asteroids
Distance from B = 40km
Describe how electromagnetic radiation is propagated by the interaction between electric and magnetic field
oscillating charged particles induce a magnetic field. This subsequently induces an electric field perpendicular to the magnetic field
Draw a feynman diagram for beta negative decay of a neutron
See board
Explain how young's double slit provides evidence for the wave nature of light
Light travels through 2 slits ad diffracts around the opening. The two waves of light then interact with each other to form alternating bands of constructive and destructive interference
Explain the Barn paradox
Consult teacher for answer