Y10 Recall quiz questions Flashcards
units for mass
kg
units for time
seconds
What is a vector?
something that has size and direction
metres to kilometres
÷1000
What is a scalar?
something that has size but no direction
cm to metres
÷100
Examples of scalar quantities (d,s)
distance,speed
Examples of vector quantities (d,f,v)
displacement,force,velocity
How are vectors represented
using arrows
units for speed
m/s
typical walking speed
1.5 m/s
typical car speed
10-30 m/s
typical running speed
3 m/s
typical speed of sound
330 m/s
typical cycling speed
6 m/s
define accleration
the rate of change of velocity
what does the gradient of a distance-time graph give you?
the speed
equation for speed
speed = distance/time
what does the gradient of a velocity-time graph give you?
the acceleration
what does the area under a velocity time graph give you?
the total distance travelled
units for acceleration
m/s^2
what can a force not do?
change the mass of an object
define force
A push or pull that acts on an object due to the interaction with another object
units for force
newtons
define a contact force
A force which acts between objects that are physical touching
define a non contact force
A force which acts at a distance, without any contact between objects
examples of contact forces(fart)
friction, tension, air resistance
examples of non contact forces (gem)
gravitational, electrostatic, magnetic
units for work done
Joules (J)
When is work done?
An object is moved a distance by a force
What are the units for weight?
Newtons (N)
Where does weight act?
Through the centre of gravity of an object
What is the equation for weight?
W =mg
What is the unit for height?
m
What is the unit for power?
Watt
Conduction transfers thermal energy mostly in…
Solids
A Uranium-235 nucleus has energy in the…
Nuclear energy store
Two electrons very close to each other have energy in the…
Electrostatic potential energy store
Convection transfers thermal energy in…
gases and liquids
Only radiation can transfer energy through what medium? (conduction and convection cannot)
a vacuum
A convection current is when…
a hotter fluid rises and a colder fluid sinks
What is the best absorber of infrared radiation?
a matte black surface
What is the best emitter of infrared radiation?
a matte black surface
Define insulation
Decreases thermal energy transfer through conduction
What is the equation for work done?
work done = force x displacement
What is work done?
The amount of energy being transferred
What is the equation for gravitational potential energy?
GPE = m x g x h
What is the equation for kinetic energy?
Ek = 0.5 x m x v^2
What is the highest point above the equilibrium called on a wave?
peak
define wavelength
the distance from a point on one wave to the equivalent point on the adjacent wave
define a transverse wave
vibration of the wave travel perpendicular to the direction of energy transfer
what is the lowest point below the equilibrium called on a wave?
trough
name an example of a transverse wave
light
increasing the amplitude increases what?
volume of sound
unit of frequency?
Hz
define a longitudinal wave
vibrations of the wave are parallel to the direction of energy transfer
units of wavelength?
m
name an example of a longitudinal wave
sound
