Question

高中物理题，帮忙解答下，谢谢。

Hydraulidefined as c engineers in the united States often use，as a unit of volume of water, the acre-foot,the volume of water that will cover 1 acre of land to a depth of 1ft. A severe thunderstorm dumped 2.0 in. of rain in 30 min on a town of area 26 km². What volume of water, in acre-feet, fell on the town?What mass of water fell on the town during the thunderstorm?One cubic meter of water has a mass of 10³kg.

Answer 1

大意是：
the acre-foot，英亩*英尺，就是底面积为1英亩深1英尺的水的体积，作为水的体积单位，在美国很常用。
一场雷雨30分钟内将26 km²的小镇淹了2英寸。
用“英亩*英尺”作单位，小镇有多少体积的水？
镇上的雨水有多少吨？1立方米的水重10³kg，即1吨。

解题过程：
因1 km² = 247.105 英亩 故26 km²=6424.73英亩
2英寸=1英尺/6=0.167英尺
小镇雨水的体积6424.73*0.167= 1072.93英亩*英尺

2英寸=5.08厘米=0.0508米,26 km²=26 000 000m²
镇上的雨水重量26000000*0.0508=1320800吨.

Answer 2

我物理学好了，但我英语确实没学好。