Cogwheel number 1 rotates counterclockwise as shown.
If the red cogwheel rotates in the direction of the arrow choose option 1; if it rotates in the opposite direction choose option 2; if the red cogwheel does not move at all choose option 3.
Two identical triangles are placed inside a water tank as shown in the diagram below. The triangles are fixed in position. On which triangle will a greater force be exerted?
A tube is attached to the left-hand side of a connector. Two tubes, situated one on top of the other, are connected to the right-hand side. Water enters the system from the left tube, flows at a constant velocity through the connector, and exits via the two right-hand tubes. At which opening is the velocity of water the greatest?