问题 计算题

(9分)如图所示是一列简谐横波在某时刻的波动图象,从该时刻开始,此波中d质点第一次到达波谷的时间比e质点第一次到达波谷的时间早0.10 s.若b质点的平衡位置为x=m,求至少经过多长时间b质点经过平衡位置且向下运动以及b质点在这段时间内经过的路程.

答案

   12.5cm

题目分析:根据波的传播方向与质点振动方向的关系,可知此波沿x轴正方向传播.

依题意λ=4 m,T=0.4 s…………(2分)

可得v= =10 m/s…………(2分)

这段时间等于-1m处的质点振动状态传播到b质点所用的时间

……….(2分)

由波动图像可知b质点的纵坐标为…….(2分)

则这段时间通过的路程S=12.5cm

阅读理解

阅读理解。

     William Shakespeare was born in 1564 at Stratford-on-Avon in England. At that time Elizabeth I had been

Queen for years.

     We do not know much about Shakespear's life. However, we do know that his father was a shopkeeper

and that his mother was the daughter of a farmer. William went to Stratford Grammar School, where he learnt

Latin, scripture and mathematics.

     When he left school, William was employed by his father. He married a local girl, Anne Hatheway, when

he was eighteen. Three years later he left Stratford and went to London.

     We do not know anything about Shakespeare's life between the years 1585 and 1590. We are certain,

however, that by the end of 1590 he had joined a group of actors and had started writing plays. During the

next twenty years he wrote thirty-two plays. He possibly wrote more plays, which he did not have published

or performed.

     Shakespeare went back to Stratford-on-Avon a few years before he died in 1616 at the age of 52.

1. Shakespeare went to Stratford Grammar School because he _____. [ ]

A. wanted to get married

B. wanted to learn to write plays

C. wanted to make a living by himself

D. was going to learn mathematics and other courses

2. Shakespeare's mother was probably born in _____. [ ]

A. the cities

B. a rich family

C. the United States

D. the countryside

3. We may conclude that _____. [ ]

A. Shakespeare went to London after his marriage

B. Shakespeare went to Stratford Grammar School for grammar learning

C. Shakespeare started to write plays at the age of 30

D. Shakespeare wrote 32 plays in his life time

4. Shakespeare died in _____. [ ]

A. England

B. London

C. the 15th century

D. the 16th century

5. The good title of the text should be _____.  

A. Stratford-on-Avon

B. Anne Hatheway

C. William Shakespeare

D. Scripture and mathematics

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