The Equations Flashcards
What is the formula for calculating kinetic energy (symbol and word)?
What is the formula for calculating velocity in kinetic energy?
What is the formula for calculating mass in kinetic energy?
Kinetic energy= 1/2 x Mass x Velocity squared
KE= 1/2MV2
V= square root of 2KE -:- M
2KE -:- V2.
What is the formula for calculating gravitation potential energy (symbol and word)?
Gravitational potential energy= Mass x Gravitational field strength x Height
GPE= mgh
What is the formula for calculating the efficiency of a device (both power and energy)?
Efficiency= useful output energy -:- total energy input
Efficiency= useful power output -:- total power input.
What is the formula for calculating work done?
Word done= Force applied x Distance travelled
What is the formula for calculating weight?
What is the formula for calculating mass?
In these equations, what is the formula for calculating the gravitational field strength?
Weight= Mass x Gravitational field strength
Mass= Weight -:- Gravitational field strength
Gravitational field strength= Weight -:- Mass.
What is the formula for calculating power (energy)?
Power= Energy transferred -:- Time
What is the formula for calculating energy transferred (concerning specific heat capacity)?
Energy transferred= Mass x Specific Heat Capacity x Temperature Change
What is the formula for calculating elastic potential energy (symbol and word)?
Elastic potential energy= 1/2 x Spring constant x Extension squared
EPE= 1/2Ke2.
What is the formula for calculating charge (symbol and word)?
Charge= Current x Time Taken
Q= I x T
What is the formula for calculating the potential difference across a component (symbol and word)?
Potential difference a component= Energy transferred -:-charge
V= E -:- Q
What is the formula for calculating resistance (word and symbol)?
What is the formula for calculating potential difference (word and symbol)?
What is the formula for calculating current (word and symbol)?
Resistance= Potential difference -:- Current
R= V -:- I
Potential difference= Resistance x Current
V= IR
Current= Potential difference -:- Resistance.
What is the formula for calculating power (energy and work done)?
Power= Energy transferred -:- Time
Power= Work Done (J) -:- Time.
What is the formula for calculating power in an electrical component (symbol and word)?
Power= Potential difference x Current
W= VA
What is the formula for calculating power in an electrical component when we aren’t given potential difference?
Power= Current squared x Resistance
W= I2 x R
What are the two formulas for calculating energy transferred in an electrical circuit?
Energy= Power x Time
Energy= Charge x Potential Difference
What are the two formulas for calculating efficiency in an electrical device?
Efficiency= Useful output energy -:- Total energy input
Efficiency= Useful power output -:- Total power input
What is the formula for calculating density?
Density= Mass -:- Volume
What is the formula for calculating specific latent heat of fusion (word and symbol)?
Specific latent heat of fusion= Energy -:- Mass
Lf= E -:- M
What is the formula for calculating the specific latent heat of vaporisation?
Specific latent heat of vaporisation= Energy -:- Mass
Lv= E -:- M
What is the formula for calculating the pressure of gases?
Pressure x Volume= Constant
What is the formula for calculating a moment?
Moment= Force x Distance perpendicular to the pivot
What is the formula for calculating speed?
What is the formula for calculating distance?
What is formula for calculating time?
Speed= Distance -:- Time
Distance= Speed x Time
Time= Distance -:- Speed.
What is the formula for calculating acceleration?
Acceleration= (Final velocity - Initial velocity) -:- Time
What is the formula for calculating the resultant force?
Resultant force= Mass x Acceleration
What is the formula for calculating momentum?
Momentum= Mass x Velocity
What is the general formula for calculating the force applied (concerning spring constant)?
Force applied= Spring constant x Extension
What is the formula for calculating pressure (word and symbol)?
Pressure= Force -:- Area
P= F -:- A
What is the formula for calculating pressure in liquids (word and symbol)?
Pressure= Height of the column x Density of the liquid x Gravitational field strength
P= H x -p x G
What is the formula for calculating the frequency of a wave?
Time period (seconds)= 1 -:- Frequency (Hertz)
What is the formula for calculating wave speed of a wave (symbol and word)?
Wave speed (m/s)= Frequency (Hz) x Wavelength (m)
V= f x lamda
What is the formula for calculating the distance travelled by a wave?
Distance= Speed of ultrasound waves in body tissue x Time Taken
What is the formula for calculating the depth do the boundary below the surface in waves?
Depth of boundary= 1/2 x Speed of ultrasound waves x Time Taken.
What is the equation describing the reflection of an image in a mirror?
Angle of Incidence= Angle of Reflection.
What is the formula for calculating the magnetic flux density of an object?
What is magnetic flux density measured in?
Force= Magnetic Flux Density x Current x Length
Tesla (T).
What is the equation for calculating the potential difference and the number of turns of different coils (symbol and word)?
Pd of primary coil -:- Pd of secondary coil = no of turns of primary coil -:- no of turns of secondary coil
Vp -:- Vs = Np -:- Ns.
What is the equation for the different powers in transformers?
What is the formula for this (remembering that P= VI)?
Pp = Ps
Vp x Ip = Vs x Is.
What is the equation for calculating the potential difference in a series circuit?
What does this equation mean?
V (total)= V1 +V2…
In series circuit the total potential difference of the supply is shared between the various components. This means the potential difference around a series circuit always adds up to equal the source of potential difference.
What is the equation for calculating the current in a series circuit?
What does this equation mean?
What two factors affect the size of the current in series?
I1= I2=…
In series circuit the same current flows through all components
The total potential difference of the cells and the total resistance of the circuit.
What is the equation for calculating the resistance in a series circuit?
What does this equation mean?
R (total)= R1 + R2
In series circuit, the total resistance of two component is just the sum of their resistances.
What is the equation for calculating the potential difference in a parallel circuit?
What does this equation mean?
V1 = V2 = …
In parallel circuits all components get the full source of potential difference so the potential difference is the same across all components.
What is the equation for calculating the current in a parallel circuit?
What does this equation mean?
I (total)= I1 + I2 +…
In parallel circuits, the total current flowing around the circuit is equal to the total of all the currents through the separate components.
What is the formula for calculating the stopping distance?
Stopping Distance= Thinking Distance + Braking Distance.
What is the formula for calculating the change in momentum (give units)?
In this equation, what is the formula for calculating the force (give units)?
What is the formula for calculating the change in time (give units)?
Change in momentum (kg m/s)= Force (N) x Change in time (s)
Force (N)= Change in momentum (kg m/s) -:- Change in time (s)
Change in time (s)= Change in momentum (kg m/s) x Force (N).
What is the formula for calculating the magnification of an object?
What is the formula for calculating the image size of an object?
What is the formula for calculating the object height of an object?
Magnification= Image height -:- Object height
Image height= Magnification x Object height
Object height= Image height -:- Magnification.
What is a systematic error?
What is a random error?
What is a zero error?
Something that is wrong with the device
Something that’s not going to be the same difference every single time
When a device doesn’t read zero.
