Astrophysics
What is the speed of light in a vacuum (approx.)
3*10^8 ms^-1
What's the equation for kinetic energy?
0.5mv^2
Which particle in an atom has no charge?
Neutron
What is the SI unit for energy?
Joules (J)
Why can't sound travel in space?
There is no medium (sound is a mechanical wave)
Which galaxy is the milky way going to collide with in about 5 billion years?
Andromeda
What is the law of conservation of energy?
The total amount of energy in an isolated system always remains the same
What 2 elementary particles are protons and neutrons made out of?
Up & down quark
Why do metals feel cold?
They conduct heat away from your hand faster
What is Heisenberg's uncertainty principle?
It is impossible to simultaneously know both the exact position and exact momentum of a particle
What is proof that dark matter exists?
Galaxies spin faster than they should
When can you not use SUVAT equations?
Non-constant acceleration
What "field" gives elementary particles their mass?
Higgs field
Why are perpetual motion machines theoretically impossible?
2nd law of thermodynamics (entropy)
What does quantum mean?
The smallest discrete unit of a phenomenon (such as energy)
How did we discover the universe is expanding?
In 1929, Edwin Hubble realised wavelengths emitted by distant galaxies were redshifted; more distant galaxies redshifted more
What is an inertial reference frame?
A frame of reference that is not accelerating
What is the force that keeps protons from repelling each other in the nucleus?
Strong force (what makes nuclei possible)
What's the equation for internal energy of an ideal monatomic gas?
3/2nRT
Temp. at which the material conducts with 0 electrical resistance
What's the equation for Schwarzschild's radius?
R=2GM/c^2
What are Einsteins 2 postulates of special relativity?
1. Laws of physics are always obeyed inertial reference frames
2. Speed of light in a vacuum is the same for all observers, regardless of their reference frames
Name of principle that states that no two identical fermions can occupy the same quantum state
Pauli's exclusion principle
What's the change in internal energy when an ideal gas undergoes isothermal expansion?
0
Which food provider is better? Sodexo or SmorgASSbord?
SODEXO TREATED US LIKE GLORIOUS SIGMAS