The one that begins dV/dt=2πMy... There are some big brains on this site so can anybody offer any clues? Personally, I think it is just a made up equation, but am not sure.

pointing to the equation. Its a recipe for a

mixed drink.

The equation looks like it is measuring how fast you can drink beer.

Quote:AceCrAAckersdV/dt means change in volume over time. 2piMy looks like the circumference of beer mug and the other part would be other factors like size of the mouth and the rate of gulp or some other variable like this.

The equation looks like it is measuring how fast you can drink beer.

I agree, thats why the beer mug has an arrow

pointing at the equation.

Quote:EvenBobThe expression "dv/dt" is calculus, meaning the rate of change over time.

/dt is change over time (denominator). Numerator is dV so they are measuring change of something related to change of something else. dV is probably volume.

Example dx/dt is change of distance over change of time. This is more commonly known as velocity.

dv/dt is change of velocity over time. This is more commonly known as acceleration.

Quote:WizardThanks, but I knew the dv/dt part. What does the rest of it mean?

Just a guess here, but I imagine that the V refers to Volume, and not velocity. It looks like it some kind of an estimate of the change in volume of the head of a beer as a function of the hops that are added.

It is a guess, but if there are 6 different kinds of hops and that strange symbol which looks like (£ or ₤) without the cross hatches stands for weights.

Another photo of equation in which there seems to be some indication that the head of the beer is related to the equation.

Seriously, guys. The Wizard is a mathematician. You don't have to tell him d()/dt is calculus. I had to understand this equation in my freshman year.

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Quote:pacomartinJust a guess here, but I imagine that the V refers to Volume, and not velocity. It looks like it some kind of an estimate of the change in volume of the head of a beer as a function of the hops that are added.

It is a guess, but if there are 6 different kinds of hops and that strange symbol which looks like (£ or ₤) without the cross hatches stands for weights.

There's far more than 6 types of hops. I would guess head rentention, based on the words underneath the beer glass.