Physics Mock Flashcards
What’s a scaler and what unit does it measure it?
-Size or magnitude only
-measures in m/s (distance)
What is vector and what unit does
-magnitude and direction
-measure in m/s
-acceleration
What does the term displacement mean?
Distance but with direction
What was newton 1st law?
object remains in the same state of motion unless a resultant force, If all the forces are balanced the resultant force is zero.
What does the term friction mean?
When 2 object slide thought each other
What’s the equation that link with velocity acceleration and time
a=v-u
—-——
t
What is the equation link with time speed and distance
Speed=distance
——————
Time
Give 2 example of a scaler quantities
Distance
Mass
Temperature
Height
Speed
Time
Give 2 example of vector quantities
Weight
Displacement
Force
Velocity
What does the term resultant force mean?
Multiple force acting on a object at once
What does the term braking distance mean?
Distance of a vehicle travels in the time after the driver has applied a break.
What does the term stopping distance mean?
When the driver must bring the vehicle to a stop in the shortest distance possible
What does the term Reaction time
amount of time that takes places between when we perceive something to when we respond to it
Give 2 factors that can affect the reaction time
Tiredness
Drugs
Distraction
Alcohol
Give a reason why a driver applied breaking distance?
Poor road
Poor vehicle condition
More mass is in the vehicle
Give a type of energy stores
Magnetic
Internal
Chemical
Kinetic
Nuclear
Gravitational potential
What does the term energy efficiency mean?
transferred into useful called efficiency
How do you calculate energy efficiency?
Useful energy transferred
————————————-
Total energy supplies
If asked to give percentages times by 100
How to keep warm
The choices between material that are poor conduct it has a low resistance
What is the term renewable energy mean?
Energy which are able to quickly replenish themselves and can be use over and over again
What is the term non-renewable energy mean?
Once sources are used up, they cannot be replaced/replalished.
Give two examples of a non-renewable
Give two examples of a non-renewable
And advantages and the disadvantages of fossil
Advantages: Cheap
Disadvantage: Supplies are limited
Which visible It has the lowest frequency and the highest frequency
Red light has the lowest frequency
Violet light has the highest frequency
What is the order of a visible light sequence
Red , Orange , Yellow , Green , Blue , Indiago , Violet
What does the term electromagnetic wave mean?
Vibrations between an electric field and magnetic field.
What does all electromagnetic wave have?
Travels at the same speed
transverse energy as radiation
Waves with a short wavelength has a…
A high frequency and high energy
Waves with a long wavelength has a…
Short frequency and low energy
What are the uses of a long wavelength?
Communication
Broadcasting television
Microwave
What are the uses of a short wavelength?
Cooking
Communication
What is the aim of investigate light refraction?
To see a clear ray reflection from the surface of the block
Who made the atomic model?
Scientist, John Dalton . Carried series of experiments
What is the relative mass of a 🫐proton🫐
and the relative charge?
Relative mass : 1
Relative charge : +1
What is the relative mass of a 🫐neutron🫐
and the relative charge?
Relative mass:1
Relative neutron:0
What is the relative mass of a 🫐electron🫐
and the relative charge?
Relative mass:-1
Relative charge:1/1860
What is the term background radiation?
level of ionising radiation presented in the environment.
What is the mass number that the first second and third layer of a atomic model?
1st: 2
2nd:8
3rd:8
What does the term radioactive decay mean?
atomic nucleus loses energy by radiation.
What does the term half-life mean?
Time required for a quantity of substance to reduce to half of an internal value
What does the term half-life mean?
The time required for a quantity of substance to reduce to half of an internal value
What are the dangers of radioactivity?
Skin burns
Cause of cancer
What are the dangers EM radiation?
Damage DNA and cells
What are the steps toward doing Investigating light refraction
1) Set up a ray box, slit and lens so that a narrow ray of light is produced.
2) lace a 30 centimetre (cm) ruler near the middle of a piece of plain A3 paper
3) Place the longest side of a rectangular acrylic polymer
4)Use the ray box to shine a ray of light at the point where the normal meets the block.
5) The angle between the normal and the incident ray is called the angle of incidence.
6) Use a pencil on the paper, mark the path of the incident ray
7)Remove the block. Draw a line joining each cross to the point where the normal meets
8)Repeat steps 2 to 7 for different angles of incidence
9) Measure the angle of incidence and angle of refraction for each block.
