Flashcards in past paper questions Deck (15):
outline how the molecular model of an ideal gas accounts for the rise in temperature.
the molecules gain energy by the collisions as a result of the piston moving so the average KE of the molecules increases, the temp is a measurement of the av KE, so if the AV KE increases, so does the temperature
Impulse is a change in Momentum. impulse equals force times the time that force acts...
by applying newtons law of motion to the collision of two particles, deduce that momentum is conserved in the collision
when force are in contacts, the forces acting on them are = and opposite. impulses are equal and opposite so changes in momentum are = and opposite. total change in momentum is equal to zero. therefore, momentum is conserved.
the particles of a medium vibrates at right angles to the direction of energy transfered
the particles vibrate in the same direction as the direction of energy transfer
1 over the period.
the ratio of work per time
a constant force of magnitude F moves form an object at constant speed V in the direction of the force. deduce that the power P required to maintain constant speed is given by the expression
P= work/time= F
an atom or neucleus that is characterized by its constituents in its neucleaus (Proton and neucleon number)
an element containing the same # of protons, but a different neuceon number
more neucleons ='s?
greater magnitude of binding energy
define electric field strength:
the forced per unti charge exherted on a small test charge
describe the concept of drift velocity as applied to the conduction electrons in a conductor
electrons have high random speeds when accelerated by an electrical field. inside a conductor, although they collide, they obtain a net speed in the diretion opposite the field dirretion
define electromotive force:
the power supplied per unit current