问题
计算题
闹钟的秒针长4 cm ，求秒针的针尖运动的线速度和角速度。
答案
v=4.2×10-3m/s
ω=0.105rad/s
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闹钟的秒针长4 cm ，求秒针的针尖运动的线速度和角速度。
v=4.2×10-3m/s
ω=0.105rad/s
Choose the word or expression which has the same meaning as the underlined part. (选择与划线部分意思接近的单词或词组): 5%
小题2:I don’t like the soup with the unpleasant smell. 小题3:The nurse gave the baby a thorough cleaning after its birth. 小题4:I suppose that you are tired. 小题5:Trees can let out oxygen back into the air. |