Save
physics
Save
Share
Learn
Content
Leaderboard
Share
Learn
Created by
Samin Khan
Visit profile
Subdecks (1)
physics small def
physics
95 cards
Cards (201)
Systematic errors
The reading is larger or smaller than (or varying from) the true reading by a
constant
amount
View source
Random errors
Scatter
in readings about the
true
reading
View source
Precision
The size of the
smallest
division (on the measuring instrument) or
0.01
mm for the micrometer
View source
Accuracy
How close (
diameter
) value is to the true (
diameter
) value
View source
Instruments
used to measure
Length
: metre rule/tape
Diameter
: micrometer (screw gauge) / digital caliper
Resistance
: ammeter and voltmeter/ohmmeter/multimeter on 'ohm' setting
View source
Experimental measurements that are more accurate will have the
peak
/average value move towards the
true
value
View source
Experimental measurements that are more precise will have lines that are
closer
together/
sharper
peak
View source
Systematic errors
e.g. constant error (in all readings), cannot be eliminated by
averaging
, error in measuring
instrument
View source
Random errors
e.g. readings scattered (equally) about true value, error due to observer, can be eliminated by
averaging
View source
Ways
to reduce systematic error in micrometer readings
Check for
zero
error (on micrometer)/
zero
the micrometer
View source
Acceleration
Change in
velocity
/time (taken) or rate of change of
velocity
View source
Speed
Distance/time and has
no
direction
View source
Velocity
Displacement/time and has
magnitude
and
direction
View source
Distance
Sum of
lengths
moved
View source
Displacement
Straight line between
two
points and is a
vector
View source
Scalar
quantity
Has
magnitude
only
View source
Vector quantity
Has
magnitude
and
direction
View source
Mass
Property of a body resisting changes in
motion
/quantity of matter in a body/measure of
inertia
to changes in motion
View source
Weight
Force due to the gravitational field/
force
due to
gravity
View source
Situations
where mass is constant but weight changes
Change in
gravitational
field strength
Change in
fluid
surrounding body
View source
Newton
's second law
(Resultant) force
proportional
/equal to rate of change of
momentum
View source
Conservation
of momentum
Total momentum of a system (of colliding particles) remains constant provided there is no resultant external force acting on the system/ isolated or closed system
View source
Newton's first law
A body/mass/object continues (at rest or) at
constant
/ uniform
velocity
unless acted on by a resultant force
View source
Momentum
Mass
x
velocity
View source
Kinetic energy
Momentum^
2
/ 2 x
mass
View source
Pressure
Force
/
area
(normal to force)
View source
Deriving
pressure due to liquid
1. Use of m=pV and use of V=Ah and use of F=mg
2. Correct
substitution to obtain p=pgh
View source
Explaining pressure exerted by gases
1.
Molecules
/atoms/particles in (
constant
) random/haphazard motion
2. Molecules have a change in
momentum
when they collide with the
walls
3.
Force
exerted on molecules therefore force on the
walls
4. Reference to average force from many
molecules
/many
collisions
View source
Pressure at top of mountain
Fewer
molecules
per unit
volume
Temperature
is less
Hence
lower
speed of molecules
Hence less
pressure
View source
Deriving pressure exerted by liquid on base
1.
Pressure
=
Force
/Area
2.
Weight
(of liquid)/Force (on
base
) = Ahpg
3.
Pressure
=hpg
View source
Frequency of a progressive wave
Number of
oscillations
per unit time of the
source
/of a point on the wave/of a particle (in the medium)
Number of
wavelengths
/wavefronts per unit time passing a (
fixed
) point
View source
Loudspeaker moving towards observer causes rise in/
higher frequency
, loudspeaker moving away from observer causes fall in/
lower frequency
View source
Diffraction of a wave
Wave incident on/passes by or through an
aperture
/
edge
Wave spreads (into geometrical shadow)
View source
Longitudinal wave
Vibrations/oscillations (of the particles/
wave
) are
parallel
to the direction or in the same direction (of the propagation of energy)
View source
Transverse
wave
Vibrations/oscillations (of the particles/wave) are
perpendicular
to the
direction
(of the propagation of energy)
View source
Doppler effect
Change/difference in the
observed
/apparent frequency when the source is
moving
(relative to the observer)
View source
When
a distant star is moving
away
from a stationary observer, the wavelength increases/frequency decreases/red shift
View source
Adjustments to produce stationary waves on a stretched string
Alter distance
from
vibrator
to pulley
Alter frequency
of
generator
Change tension
in
string
by changing value of the masses
View source
Diffraction
Spreading
/
diverging
of waves/light (takes place) at (each) slit/element/gap/aperture
View source
Interference
Overlapping of waves (from coherent sources at each element)
View source
See all 201 cards
See similar decks
Edexcel A-Level Physics
3500 cards
AP Physics C: Mechanics
2382 cards
AQA A-Level Physics
3710 cards
AP Physics C: Electricity and Magnetism
1950 cards
AP Physics 1
2330 cards
AP Physics 1: Algebra-Based
2063 cards
AP Physics 2: Algebra-Based
2508 cards
OCR A-Level Physics
3077 cards
2024-25 AQA A-Level Physics
4036 cards
GCSE Physics
3155 cards
WJEC GCSE Physics
1496 cards
Edexcel GCSE Physics
3171 cards
CCEA GCSE Physics
2123 cards
OCR GCSE Physics
1265 cards
OCR GCSE Physics
1329 cards
Unit 8: Space Physics (Physics Only)
AQA GCSE Physics
284 cards
Unit 8: Space Physics (Physics Only)
GCSE Physics
264 cards
7.3. Particle Physics
Edexcel A-Level Physics > 7. Nuclear and Particle Physics
61 cards
6.4.3 Particle Physics
OCR A-Level Physics > Module 6: Particles and Medical Physics > 6.4 Nuclear and Particle Physics
49 cards
1.7. Communicating Physics
Edexcel A-Level Physics > 1. Working as a Physicist
83 cards
8. Nuclear physics
2024-25 AQA A-Level Physics
274 cards