The epicentre of an earthquake is the point on the Earth's surface nearest to the site of the earthquake.An earthquake produces waves.These waves spread out from the epicentre of the earthquake and travel along the Earth's surface.(a) One wave is emi

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The epicentre of an earthquake is the point on the Earth's surface nearest to the site of the earthquake.An earthquake produces waves.These waves spread out from the epicentre of the earthquake and travel along the Earth's surface.(a) One wave is emi

The epicentre of an earthquake is the point on the Earth's surface nearest to the site of the earthquake.An earthquake produces waves.These waves spread out from the epicentre of the earthquake and travel along the Earth's surface.(a) One wave is emi
The epicentre of an earthquake is the point on the Earth's surface nearest to the site of the earthquake.An earthquake produces waves.These waves spread out from the epicentre of the earthquake and travel along the Earth's surface.
(a) One wave is emitted very second.What is the frequency of thes waves?
(b) These surface-waves travel at a constant speed of 6000m/s through materials commonly found on land.Calculate the wavelength of these waves.
(c) The diagram below shows the surface-waves from the epicentre A travelling along the Earth to a point B exactly opposite the epicentre.The radius of the Earth,r,is 6400km.Calculate the distance travelled by the waves from A to B and the time taken.(Circumference of a circle=2∏r,take ∏=3.14)
(d) Give one reason why these waves might not reach B.

The epicentre of an earthquake is the point on the Earth's surface nearest to the site of the earthquake.An earthquake produces waves.These waves spread out from the epicentre of the earthquake and travel along the Earth's surface.(a) One wave is emi
(a) f=1
(b)v=f入
入=6000m
(c)d=2∏r/2
=3.14(6400)
=20096km
t=20096x1000/6000
t=3349s
(d)The energy had change to another energy.

The epicentre of an earthquake is the point on the Earth's surface nearest to the site of the earthquake.An earthquake produces waves.These waves spread out from the epicentre of the earthquake and travel along the Earth's surface.(a) One wave is emi in the arms of an “in the blink of an an illusion of the operation of the stock market. for an order of the size 翻译 IN THE BLINK OF AN EYE怎么样 In the Blink of an Eye 歌词 the organization of an article中文意思 an enquiry into the nature of the opening of an action flick是什么? THE HISTORY OF AN OBSESSION怎么样 an arm of the State 是什么意思 The discovery of america was an accident. the Grand Ceremony of Feng'an意思? an average of 和the average of的区别 An Analysis of the Character of Scarlet 英译汉 an offical of the International School of Tongji University.翻译 an amount of,a number of,the amount of,the number of的意思与区别?