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Physics — Advanced
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AdvancedScience
Today's questions
Today's quiz questions
These are the questions that make up today's quiz. Test your knowledge, see how much you know, and learn from the explanation behind every answer.
1.What is dark energy?
- •An unknown form of energy comprising ~68% of the universe that drives its accelerating expansion
- •The thermal energy of the cosmic microwave background
- •The energy released by dark matter annihilation
- •Energy from black holes that powers quasars
2.What is Noether's theorem?
- •Every particle has a corresponding antiparticle
- •All physical laws are invariant under Lorentz transformations
- •Every fundamental force has a corresponding antiforce
- •Every continuous symmetry of a physical system corresponds to a conserved quantity (e.g., time symmetry → energy conservation)
3.What particle is responsible for mediating the electromagnetic force?
- •Photon
- •W boson
- •Graviton
- •Gluon
4.What is quantum entanglement?
- •The merging of two particles into one during a collision
- •Two particles occupying the same quantum state simultaneously
- •A phenomenon where two particles become correlated such that the quantum state of one instantly determines the state of the other, regardless of distance
- •The interference of two quantum wavefunctions producing a new pattern
5.What is the holographic principle?
- •The idea that the universe is a computer simulation
- •A principle stating that observing a quantum system always alters it
- •The conjecture that all information within a volume of space can be described by a theory on the boundary of that region
- •The principle that 3D images can be stored on 2D surfaces using lasers
6.What is quantum decoherence?
- •The breaking of entanglement between two particles
- •The decay of unstable quantum states into stable ones
- •The loss of quantum information when particles are destroyed
- •The process by which quantum superpositions are destroyed through interaction with the environment, producing classical-like behavior
7.What is the Chandrasekhar limit?
- •The maximum mass (~1.4 solar masses) a white dwarf star can have before electron degeneracy pressure can no longer support it against gravitational collapse
- •The minimum mass needed for nuclear fusion to begin in a star
- •The maximum temperature a star can reach before going supernova
- •The maximum distance at which a star can gravitationally bind a planet
8.What is quantum entanglement?
- •A phenomenon where particles become correlated and measuring one instantly affects the other
- •The process of splitting an atom into smaller particles
- •The tunneling of particles through energy barriers
- •The merging of two quantum fields into one
9.What does the second law of thermodynamics state?
- •The pressure of a gas is inversely proportional to its volume
- •For every action there is an equal and opposite reaction
- •Energy cannot be created or destroyed
- •The total entropy of an isolated system tends to increase over time
10.What is Hawking radiation?
- •The background radiation left over from the Big Bang
- •Theoretical radiation emitted by black holes due to quantum effects near the event horizon
- •Radiation emitted by neutron stars during their formation
- •X-ray radiation from active galactic nuclei