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 k
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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 k
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.
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 k
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.
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.
我物理学好了，但我英语确实没学好。