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28 Terms
Water melting point
0*c
Parallel
Side by side
Voltage is the same
Resistance is less than the smallest resistor
Why is some food radioactive
It contains isotopes that emit nuclear radiation
What rays are background radiation from space
Cosmic
Water boiling point
100*c
Charge unit
Coloums
Deceasing the current does what
Increases resistance
Parallel
End to end
Current splits between the branches
Voltage is shared
Resistance is the sum of all
Potential is shared
Number of neutrons
Atomic number - mass
Atomic number
Protons
Mass number
Protons + neutrons
Why are things unreactive
They have full outer shells so don’t need to react with anything else
Chemical properties of transition elements and group 1 elements
Form coloured ions
Very unreactive
Used as catalysts
What did Mendeleev do
Left gaps for undiscovered elements
Made predictions about the properties of undiscovered elements
Predictions were correct
Work fact in joule
One joule of work is done when one newton force moves an Object one metre
Increasing a filaments temperature does what
Increases the energy of the ions metal wire
The current in a diode is what
Directly proportional to potential difference
An alpha particle is what
Helium atom
2 protons 2 electrons
A Geiger muller tube detects
Background radiation in photographic filming
Thermistor has a high resistance at
Low temperatures
What does the size of a moment depend on
The size of the applied source
The perpendicular distance from the force to the pivot
Total clockwise moment equals what
Total anticlockwise moment
Main source of background radiation
Radon gas
Man made background radiation
Medical imaging and treatment
Nuclear power stations
Nuclear weapons
Industrial processes
When is a beta particle produced
Cosmic rays
Food
Rocks
Radon gas
What happens if u reverse cells
The reading becomes negative
Resolution of measuring instruments
Smallest change in the quantity being measured that gives a perceptible change in the reading
Current
Different particles
Small nucleus
Small
