求：
（1）水从管口到水面的运动时间t；
（2）水从管口排出时的速度大小；
（3）管口单位时间内流出水的体积Q。---**Question 19**
**Question Stem:**
如图所示, 水平放置的排水管满口排水, 管口的横截面积为 $S$, 管口离水池水面的高度为 $h$, 水在水池中的落点与管口的水平距离为 $d$。 假定水在空中做平抛运动, 已知重力加速度为 $g$, $h$ 远大于管口内径。 求:
**Questions:**
(1) 水从管口到水面的运动时间 $t$;
(2) 水从管口排出时的速度大小 $v_0$;
(3) 管口单位时间内流出的水的体积 $Q$。
**Diagram Description:**
* **Type:** Schematic diagram illustrating projectile motion.
* **Elements:**
* A horizontal line representing the water surface.
* A vertical cliff or structure on the right.
* A horizontal pipe opening is shown at the top of the cliff/structure.
* A dashed blue curved line shows the trajectory of water discharged horizontally from the pipe and falling to the water surface.
* A vertical double-headed arrow labeled "$h$" indicates the height from the pipe opening down to the water surface.
* A horizontal double-headed arrow labeled "$d$" indicates the horizontal distance from the point directly below the pipe opening to the landing point of the water on the water surface.
* The water is shown exiting the pipe horizontally and following a parabolic path downwards to the left, landing on the horizontal line (water surface).
* The pipe opening is located at a height $h$ above the landing point, and the landing point is at a horizontal distance $d$ from the vertical line passing through the pipe opening.