Of course not. Sometimes prices go up and sometimes they go down.
No, pulleys can be configured to move in the same or opposite directions. If the pulleys are set up with the same orientation, they will move in the same direction. However, by using different setups or arrangements, they can also be made to move in opposite directions.
Same direction as the worms.
The colored ribbon vibrates back and forth perpendicular to the direction of the wave as the waves pass by. It does not move in the same direction as the wave; rather, its movement is perpendicular to the wave's direction.
Seaweed will move in the direction of the sea current. It's not able to move on its own, but can develop moving skills to get around.
yes
law of demand
If the item is already in motion, yes; it will continue to move in the same direction and at the same speed.
In a belt drive system, the gears do not move in the same direction. When one gear (the driver) rotates, it causes the belt to move in one direction, which in turn makes the other gear (the driven) rotate in the opposite direction. This is due to the nature of how belts wrap around the gears.
P-wave particles move in the same direction as the wave's propagation, which is the direction of energy transfer. This movement is back and forth in the direction of the wave.
All the planets do orbit the sun in the same direction. However, as we orbit the sun quicker than the planets further out from us, and slower than the ones inside us they do at times appear to be moving the other direction.
seismic
compressional wave