Zero speed [ 0 rpm]
As the air cools during the night, it tends to flow downhill.
The speed varies from the size of the floopy disk. on average it tends to be quite slow. (:
When molecules freeze the rate of speed they go at tends to slow down
For every action there is an opposite but equal reaction. An object in motion tends to stay in motion.
His speed is average, but since he is 6'2'' he doesn't rely on speed as he does on power. Also as a striker he tends to stay in the box and run less.
upwards
Yes. Friction tends to slow the wind near the surface.
The only time you should deactivate it is if you are going offroad, otherwise you may have trouble manuevering the vehicle at high speed. Electronic traction control tends to become confused when there is dirt or mud involved.
The angle in which you are cutting is probably where the carburetor is on the downhill side. The oil in the sump tends to seek its on level in the same direction. Try mowng in the opposite direction where the carburetor is on the uphill side.
The valency does not (or tends not to) vary going up and down a group. It varies going across a period.
Yes, they can. It tends to happen more rapidly in heavy duty vehicles with air brakes, but it can happen in light duty vehicles with hydraulic brakes, as well. Brakes create friction, friction creates heat. Too much of it, and they overheat.