Physics and proportionality - inverse or direct?

For each pair of physics quantities, type in 'i' if the pair are inversely proportional to one another or 'd' if their relationship is one of direct proportionality
Inversely proportional - as one quantity decreases in magnitude, it forces the other to increase in magnitude
Directly proportional - as one quantity increases in magnitude, it forces the other to increase in magnitude too
If the second quantity is squared, then type in the letter 'i' or 'd' twice (e.g. if 'x' is inversely proportional to 'y-squared', type 'ii')
Quiz by xyz17
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Last updated: April 2, 2018
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First submittedApril 2, 2018
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Average score79.3%
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Quantities
Proportionality
current and voltage of an Ohmic resistor
direct (Ohm's law)
resistance of an LDR and light intensity
inverse
capacitance and voltage of a capacitor storing a fixed magnitude of charge
inverse
charge and current
inverse
electrical energy transferred and time
direct
speed and time taken
inverse
height of drop and velocity of a dropped ball at surface of earth
direct to the square
force and acceleration
direct (Newton's 1st law)
moment of a force and the perpendicular distance from the pivot
direct
density and volume (constant mass)
inverse
Quantities
Proportionality
upthrust and the weight of the displaced fluid
direct
upthrust and volume of a submerged object
inverse
kinetic energy and velocity
direct to the square
gravitational potential energy and mass of an object
direct
force working against friction and velocity of a moving vehicle with constant power
inverse
stretching force on a string or elastic band and the distance stretched
direct
the 'stress' on a string and its cross-sectional area
inverse
the 'stress' on a string and its diameter ('thickness')
inverse to the square
momentum and velocity of an object
direct
resistivity and length of a wire
inverse
Quantities
Proportionality
frequency and time period
inverse
light intensity and distance from the light source
inverse to the square (inverse-square law)
intensity and amplitude of a wave
direct to the square
energy of a photon and its wavelength
inverse
momentum of a quantum particle and its wavelength
inverse
momentum of a quantum particle and its frequency
direct
volume and temperature of a gas at constant pressure
direct
recession speed of a galaxy and distance from earth
direct
radioactivity of a given mass of substance and its half life
inverse
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