P3+P4 Flashcards
what are the three states of matter
solid liquid gas
explain how a gas in a sealed container exerts a pressure on the walls of the container
because the gas particles inside the container are hitting the edges of the container which is exerting pressure.
what is the formula for density
density = mass/volume
what are the units of density
kg/m3 (cubed)
how could you find the density of an irregular solid object
measure its mas, then put it in a eureka can filled with water, measure the volume of the displaced water and that’s the volume of the object
what is internal energy
total energy stored by particles in a system
what happens to the particles in a substance when that substance is being heated
they gain energy
name the 5 changes of state
freezing melting condensing evaporating sublimating (solid-gas)
does mas stay the same when a substance changes state
yes
define specific latent heat
the energy needed to change the state of a 1 Kg mass
give the formula for specific latent heat
specific latent heat = energy/mass
did people used to believe atoms where tiny spheres that couldn’t be broken apart
yes
describe Rutherford and Marsden’s plum pudding experiment
they directed a beam of alpha particles at a very thin gold leaf suspended in a vacuum
what happens to an electron in an atom if it releases EM radiation
it would fall to a lower energy level
who provided evidence to suggest the existence of the neutron
James Chadwick
