三道英文版的物理题,求翻译并解答!谢谢1. A nurse counts 76 heartbeats in one minute. What are the period and frequency of the heart's oscillations?2. New York's 300-m high Citicorp Tower oscillates in the wind with a period of 6.80s. C

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三道英文版的物理题,求翻译并解答!谢谢
1. A nurse counts 76 heartbeats in one minute. What are the period and frequency of the heart's oscillations?
2. New York's 300-m high Citicorp Tower oscillates in the wind with a period of 6.80s. Calculate its frequency of vibration.
3. Calculate the speed of waves in a puddle that are 0.15m apart and made by tapping the water surface twice each second.

1.A nurse counts 76 heartbeats in one minute.What are the period and frequency of the heart's oscillations?
一位护士测得心跳为一分钟76次.这个人的心率和周期各是多少?
答案：周期为1分钟；心率为76次
Period:1 minute; oscillation:76
2.New York's 300-m high Citicorp Tower oscillates in the wind with a period of 6.80s.Calculate its frequency of vibration.
纽约300米高的花旗（Citicorp）集团大厦在风中6.80秒摆动一次.计算出振动的频率.
这个你自己求吧
3.Calculate the speed of waves in a puddle that are 0.15m apart and made by tapping the water surface twice each second.
一个水坑中,每秒拍打水两次,可产生0.15米间隔的水波浪.计算水波浪的速度.

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