PV /T = nR where n is the number of moles of gas and R is the ideal gas constant.
if the amount of gas is constant, pressure and volume are inversely related (because they are multiplied) and that product is directly related to the kelvin temperature.
Remove any one and the same analysis is true. Ex: if temperature is constant, remove it from the problem and you still PV, a product so pressure and volume are inversely related.
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p v = n r t v = n r t / p
Directly proportional relationship is F=ma, F is directly proportional to a. Inversely proportional relationship is v=r/t, v is inversely proportional to t.
to hard forget it
etymology of english idioms
V = d / t (or v = dd/dt & v = integral of acceleration with respect to time for physics involving calculus) where V is velocity, d is displacement (distance traveled) and t is time. vf = vi + a*t (vf)^2 = (vi)^2 + 2*a*d Where vf is final velocity, vi is initial velocity, and a is acceleration v = p/m Where p is object's momentum and m is object's mass