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G484 written sections/definitions
Newton's laws and momentum
Newton's first law: An object will remain at rest or keep travelling at a constant velocity
unless acted on by an external force
Newton's second law: The net force of an object is equal to the rate of change of its
momentum
Newton's third law: When two bodies interact, the forces they exert on each other are equal
and opposite
Linear momentum: The product of an object's mass and velocity.…read more

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Geostationary orbit: The orbit of an artificial satellite which has a period equal to one day so
that it stays in the same point above the Earth's equator (from Earth the satellite appears to
be stationary).…read more

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Uses of resonance:
Nuclei of atoms resonate when they are in suitable magnetic fields and a radiofrequency pulse is
applied that matches the natural frequency of the atoms, this can be used for medical imaging
Microwave cooking- the microwaves cook the food as their frequency matches the natural
frequency of water molecules, causing them to resonate and heat up the food
When a radio is tuned you are adjusting the resonant frequency of the radio to the frequency of
the transmitted signal
In an earthquake…read more

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Pressure: the total force exerted over the area of a wall/surface- when applied to a gas a
force is provided by the change in momentum when particles collide with the walls of the
container
Assumptions of the kinetic theory of gases:
- Gas consists of a large number of particles in rapid, random motion
-Collisions between particles and the walls of container (and other particles) is elastic
-Gravitational force on particles is negligible
-No intermolecular forces exist except during collisions
-Volume of particles is negligible…read more

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Once this has been done the energy
supplied can be calculated using
Once this is known the specific heat capacity equation can be rearranged to make C the subject
Boyle's law: The pressure of an ideal gas is inversely proportion al to its volume at a constant
temperature
Charles' law: The volume of an ideal gas is directly proportional to its temperature at a
constant pressure
Pressure is proportional to the number of particles, their mass and their speed:
1.…read more

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