For most reactions, raising the temperature leads to a faster reaction/higher rate of reaction. This is because a higher temperature means that the reactant particles have a higher average kinetic energy meaning more of them have enough activation energy needed to partake in a successful collision. Not only that because they have a higher average kinetic energy they are moving faster meaning more chances of collisions
chemical weathering occurs on the surface of minerals, the water and acids that control chemical weathering require access to the surface. Physical weathering breaks the rock to provide that surface
The distance between the tank and the upstairs tap is lesser than the distance between the tank and the downstairs tap so water comes out with more force in the downstairs tap than from the upstairs one.
