you have the joke wrong .
Peristalsis moves food in one direction.
Peristalsis moves food in one direction.
velocity
Trajectory
Inverse relationship
When two variables are examined and one moves in one direction while the other moves in the opposite direction, this is called a negative correlation or inverse relationship. In this scenario, as one variable increases, the other decreases, indicating that they are inversely related. This type of relationship can often be seen in various fields, such as economics and psychology.
refraction
It moves in the direction of the force acting on it.
it moves hot to cold.
Due to Newton's 3rd law of motion the astronaut would move in the opposite direction unless he/she is braced against something.
When one variable changes, the other variable moves in the opposite direction.
energy