Why is there a proportionality constant in the heat equation? dT/dt = k * d^2T/dx^2
With k being the proportionality constant.

Arise 8 run 1 this means go 8 up and 1 across, which is steepest

An example of environmentally learned behavior is aggressive behavior, i grew up seeing many aggressive people in my life and a slowly started picking up those traits however i was able to call myself out and not give in to those traits.

The particles of the gas inside the ball heats up, bouncing off each other and spreading farther apart.hope my answer has you : )