名校
1 . “喊泉”是一种地下水的毛细现象,人们在泉口吼叫或发出其他声音时,声波传入泉洞内的储水池,进而产生“共鸣”等物理声学作用,激起水波,形成涌泉.声音越大,涌起的泉水越高.已知听到的声强
与标准声调
(
约为
,单位:
)之比的常用对数称作声强的声强级,记作
(贝尔),即
,取贝尔的10倍作为响度的常用单位,简称为分贝.已知某处“喊泉”的声音响度
(分贝)与喷出的泉水高度
(米)满足关系式
,现知
同学大喝一声激起的涌泉最高高度为70米,若
同学大喝一声的声强大约相当于100个
同学同时大喝一声的声强,则
同学大喝一声激起的涌泉最高高度约为( )米.
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2020-09-17更新
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4卷引用:内蒙古赤峰二中2021届高三第三次统一模拟考试文科数学试题