Equations Flashcards
What is the formula for kinetic energy?
kinetic energy = 0.5 x mass × (speed)²
Kinetic energy represents the energy an object possesses due to its motion.
What is the formula for elastic potential energy?
elastic potential energy = 0.5 x spring constant × (extension)²
Elastic potential energy is stored in objects that can be stretched or compressed.
What is the formula for gravitational potential energy?
gravitational potential energy = mass x gravitational field strength × height
This formula calculates the potential energy stored due to an object’s position in a gravitational field.
What is the formula for change in thermal energy?
change in thermal energy = mass × specific heat capacity × temperature change
This equation is used to calculate the energy required to change the temperature of a substance.
How is power defined in terms of energy transferred?
power = energy transferred / time
Power measures the rate at which energy is transferred or converted.
What is the formula for efficiency?
efficiency = useful output energy transfer / total input energy transfer
Efficiency indicates how effectively energy is converted from one form to another.
What is the relationship between charge flow, current, and time?
charge flow = current × time
This formula relates electric charge to current and the time duration over which it flows.
What is the formula for potential difference?
potential difference = current x resistance
Potential difference, also known as voltage, is the difference in electric potential energy per unit charge.
What is the formula for power in terms of potential difference and current?
power = potential difference × current
This formula calculates the electrical power consumed in a circuit.
What is the formula for power in terms of current and resistance?
power = (current)² x resistance
This relationship shows how power dissipates in a resistive component.
What is the formula for energy transferred in terms of power and time?
energy transferred = power x time
This equation is used to find out how much energy is consumed over a specific time period.
What is the formula for energy transferred in terms of charge flow and potential difference?
energy transferred = charge flow * potential difference
This formula helps calculate the energy transferred by electric charge.
What is the formula for density?
density = mass / volume
Density is a measure of how much mass is contained in a given volume.
What is the formula for gravitational potential energy in terms of mass, gravitational field strength, and height?
Ep = m g h
This is a specific representation of the gravitational potential energy formula.
What does ΔE represent in the equation ΔE = m c Δθ?
ΔE = change in thermal energy
This equation relates to thermal energy changes in a substance.
What does Q = It represent?
Q = charge flow, I = current, t = time
This is another representation of the relationship between charge, current, and time.
What is the formula for voltage in terms of current and resistance?
V = IR
This is Ohm’s law, which states that voltage is the product of current and resistance.
What is the formula for power in terms of voltage and current?
P = VI
This formula is used to calculate the power in an electrical circuit.
What is the formula for power in terms of force and distance?
P = F R
This formula shows the relationship between power, force, and distance.
What is the formula for energy in terms of power and time?
E = Pt
This equation indicates how energy is related to power over time.
What is the formula for energy in terms of voltage and current?
E = Vt
This formula calculates the energy based on voltage and time.
What is the formula for thermal energy during a change of state?
mass x specific latent heat
For gases, what is the relationship between pressure and volume?
pressure x volume = constant
What is the formula for weight?
mass x gravitational field strength
How is work done calculated?
force x distance (along the line of action of the force)
What is the formula relating force, spring constant, and extension?
force = spring constant x extension
How is the moment of a force calculated?
force x distance (normal to direction of force)
What is the formula for pressure?
force normal to a surface / area of that surface
What is the formula for pressure due to a column of liquid?
height of column x density of liquid x gravitational field strength
How is distance travelled calculated?
speed x time
What is the formula for acceleration?
(final velocity - initial velocity) / time taken
What is the relationship between resultant force, mass, and acceleration?
resultant force = mass x acceleration
What is the formula for momentum?
mass x velocity
How is change in momentum related to force and time?
force = change in momentum / time taken
What is the relationship between period and frequency?
period = 1 / frequency
How is wave speed calculated?
frequency x wavelength
What is the formula for magnification?
magnification = image height / object height
What is the formula for the force on a conductor in a magnetic field?
magnetic flux density x current x length
How is potential difference across coils related in a transformer?
potential difference across primary coil / number of turns in primary coil = potential difference across secondary coil / number of turns in secondary coil
What is the power relationship in a transformer?
potential difference across primary coil x current in primary coil = potential difference across secondary coil x current in secondary coil
What is the formula for gravitational potential energy?
W = m g
What is the relationship between pressure and height in a fluid?
p = hpg
How is force related to acceleration?
F = m a
What is the formula for pressure in terms of momentum?
p = mv
What is the formula for the force in terms of current and magnetic field?
F = BIl
Fill in the blank: The formula for the volume in terms of pressure is _____
pV = constant
Fill in the blank: The formula for the spring force is _____
F = ke
