The water of a wave goes with the passing of the wave. The length of a wave means the distance from the top of a wave to the bottom. (3) The speed of Wave 1 is 100 cm/s, frequency 10.The frequency of wave 2 is 300, while its speed is twice that of wave 1.Which of the ...
awhat is the means 什么是手段[translate] aProficient in use 熟练在使用中[translate] a瞧!火车正在穿过隧道。 Look! The train was passing through the tunnel.[translate] aThe number of the students in their school are over nine hundred. 学生的数量在他们的学校九百。[translate] ...
根据文章第三段中If we want to find the speed of a wave, we may use the following way : Speed ="wavelength"× frequency.和题目中所给的信息The speed of Wave 1 is 100 cm/s, frequency 10. The frequency of Wave 2 is 300, while its speed is twice that of Wave 1.可知答案,故选D。
Wind is the great maker of waves.There are exceptions such as the tidal(潮汐的)waves sometimes produced by earth-quakes under the sea.But the waves most of us know are produced by winds blowing over the sea. Now before constructing an imaginary life history of a typical wave we need to ...
Passage 57 * Waves A wave is the movement of water. Waves are made when the wind blows over the surface of water. On the beach, we can watch waves. But be careful, too. Se a waves can be very powerful and dangerous. Huge waves sometimes destroy houses and kill people. Can we cha...
Passage 64Waves读一读 A wave is the movement of water. Waves are made when the wind blows over the surface of water. On the beach, we can watch waves. Sea waves can be very powerful and dangerous. Huge waves sometimes break houses and kill people. Can we change the power of waves in...
A wave is the movement of water. Waves are made when the wind blows over the surface of water. On the beach, we can watch waves. But be careful, too. Sea waves can be very powerful and dangerous. Huge waves sometimes destroy houses and kill people. Can we change the power of waves...
B. The water of a wave remains almost at the same place. C. The water of a wave goes with the passing of the wave. D. The length of a wave means the distance from the top of a wave to the bottom. The speed of Wave 1 is 100 cm/s, frequency 10. The frequency of Wave 2 is...
Choose a place to stay together. Make sure the place is safe and as far away from the shore as possible.Bring emergency supplies(应急用品) when you have to leave your house.At last, if you find a huge wave is coming, climb onto the roof of your house or on the highest point of ...
9 The wavelength of a progressive wave is defined as the distance between adjacent points on the wave which C A have the same displacement. B have the same amplitude. C are in phase. D are in antiphase. 相关知识点: 试题来源: 解析 CA-not a correct descriptionB-not a correct description...