Astrophysics
How old is our universe?
About 13.8 billion years
What is the equation for kinetic energy?
½ mv^2
What 2 elementary particles are protons and neutrons made out of?
U quarks and d quarks
True or False. An object at rest has no energy.
False
Which galaxy is the milky way going to collide with in about 5 billion years?
Andromeda
What is the law of conservation of energy?
Energy can neither be created nor destroyed - only converted from one form of energy to another.
What is the force carrier for the strong nuclear force?
Gluon
Why is the sky blue?
Blue light gets scattered the most
How do we know that dark matter exists?
Galaxies spin faster than they should
When are SUVAT/kinematic equations used?
When there is constant acceleration
What is the equation used to find the probability of quantum particles?
Wave function (squared)
Why does metal feel cold?
It conducts heat away from your hand faster
What is the name of the black hole in the centre of the Milky Way?
Sagittarius A*
What is an inertial reference frame?
A frame of reference that is not accelerating
How many generations of leptons are there?
3
Why are temperatures lower at the poles/higher latitudes?
The same amount of light/heat is spread over a larger area.
What causes Hawking radiation?
It has to do with particle-antiparticle pairs forming near the event horizon. Particles with negative energy tend to fall past the event horizon, leaving the particle with positive energy to escape which is viewed as radiation.
What is the equation for the Lorentz factor?
Look its too complicated to type up. We'll just tell you if it's right or not.
How did we recently show that the Standard Model is incomplete?
Any valid answer, at the minimum with some reference to muons or g-value
Why are perpetual motion machines impossible?
They violate the second law of thermodynamics