作者Prestoxp (2005 POST Cup)
看板PT-92
标题Re: 普物习题 (周三下午OT班)
时间Wed Mar 2 01:38:54 2005
※ 引述《Prestoxp (2005 POST Cup)》之铭言：
: 1.2 How many heartbeats are there in a lifetime?
Normal heart activity is about 100000 heartbeats/day, or 2760000000
(that's Billion) heartbeats/lifetime.
: 1.37 A person measures her heart rate by counting the number of
: beats in 30 sec. If 40+-1 beats are counted in 30.0+-0.5 s,
: what is the heart rate and its uncertainty in beats per min?
原数据 beats & seconds *2
=> 80+-2 beats and 60.0+-1.0 seconds
取极值 82/59.0 (beats/sec.) and 78/61.0 (beats/sec.)
得到大约是 83.38 and 76.72
因为是算心跳 所以取到整数
heart rate = 80+-3 beats/min.
--
▏▎▍▌▋▊▉ 请按任意键继续 ▉
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.112.246.174