Edexcel A level Physics
Brittle
Shatters when subjected to large impacts/ little or no plastic region
When 90% of the sample has decayed N/No =
0.1 ( as 10% of the sample is remaining)
Tough
Absorbs a lot of energy from shocks without breaking/ large plastic region
If a wave enters a material with a lower refractive index it refracts...
Away from the normal (speeds up)
Ductile
Can be drawn into thin wires
Malleable
Can be hammered into thin sheets
Random
Cannot tell which nucleus will decay next
A magnifying glass consists of a...lens and the object is ...the focal length so the image is...and...
Converging, before, virtual, upright
Hard
Difficult to indent surface
Binding energy
Energy equivalent to the mass deficit when nucleons join together to form an atomic nucleus
Stiffness
How easily a material bends/ gradient of a force extension graph
To increase the distance between maxima, the number of slits per metre on a diffraction grating should...so d in ny=dsin0 should...
Increase, decrease
Beta minus decay is when
Neutron turns to a proton and an electron and anti electron neutrino emitted
What is polarised light
Oscillations in a single plane including the plane of propagation
Refractive index from glass to water equals
Sin(angle of incidence)/sin(angle of refraction)
Internal energy
Sum of the kinetic and potential energy of the molecules within a system
If a wave enters a material with a greater refractive index it refracts...
Towards the normal (slows down)
Conditions for fusion
Very high temperatures, pressure, dense, strong magnetic fields
Coherent
When two waves have the same wavelength, frequency and a fixed phase difference between them
Strong
Withstands a large force without breaking, high breaking stress