physics Flashcards
What are the 8 energy stores?
Thermal, kinetic, gravitational potential, elastic potential, chemical, nuclear, electrostatic, magnetic.
How can you reduce energy loss in homes?
Insulation, double glazing, draught excluders.
What happens to resistance when more resistors are added in series?
It increases.
What is Ohm’s Law?
Voltage = Current × Resistance (V = IR).
What is Newton’s First Law?
An object remains at rest or in uniform motion unless acted on by a force.
What is inertia?
The tendency of an object to resist a change in motion.
What factors affect thinking distance?
Speed, alcohol, tiredness, distractions.
What factors affect braking distance?
Speed, road conditions, tyre quality.
What is momentum?
Momentum = Mass × Velocity (p = mv).
What is the wave equation?
Wave speed = Frequency × Wavelength (v = fλ).
What is refraction?
The bending of a wave when it enters a new medium.
What are the 3 types of nuclear radiation?
Alpha, beta, gamma.
Which radiation is most penetrating?
Gamma rays.
What is half-life?
The time taken for half of the radioactive nuclei to decay.
