Science Flashcards
why did the dalton model change over time?
discovery of subatomic particles
the structure of an atom has…..
a nucleus with protons, neurons, electrons with shells
the size of a nucleus is…….
very small compared to an atom
where is the mass of an atom concentrated
nucleus
what four things are found in nearly all cells
membrane, DNA, Cytoplasm, Ribosomes
which electrical quantity is measured in volts
potential difference
which store of energy decreases when a warm object is cooled
thermal
state the units of measurement of energy
joules
which statement best describes the motion of an object when the resultant force acting on it is zero?
it remains stationary or moves at a constant speed
What term is used to describe the distance travelled by a car, between the driver seeing a hazard and the the car stopping?
stopping distance
What direction do magnetic field lines point?
From the north pole towards the south pole
What are the units of magnetic flux density?
tesla
Aluminium has a density of 2700 kg/m³. Calculate the mass of 0.4 m³ of aluminium.
1080kg
Which type of wave has peaks and troughs?
transverse waves
