What equations describe the physics of a kiss?

Most natural phenomena are complicated and will entail several sets of physical equations to explain them. But there will be some dominating equations in each. As for the case of kissing, the equations involved are these: 1. read more

But there will be some dominating equations in each. As for the case of kissing, the equations involved are these: Newtons 3rd law of motion: Every action has an equal and opposite reaction. Duh, since both you and the person kissing you respond to the kiss and feel the force of the lips touching. read more

Basically, an equation like your pendulum equation is based on simplistic assumptions like no friction, no rotation of the earth, constant temperature, no wind, non-relativistic velocities, etc. and the assumptions are only approximately satisfied in a real situation. read more

Physics contains equations that describe everything from the stretching of space-time to the flitter of photons. Yet only one set of equations is considered so mathematically challenging that it’s been chosen as one of seven “Millennium Prize Problems” endowed by the Clay Mathematics Institute with a $1 million reward: the Navier-Stokes equations, which describe how fluids flow. read more