in the world.Sound waves are disturbances (波动) that travel through different mediums, such as water..., sound waves travel faster through materials with greater density (密度). The fastest speed is only ……

a sound like ocean waves. But seashells don’t make sounds. The sound you hear is actually your own blood rushing through your veins (血管)! You can use any cup-shaped object (物品) to hear this sound ……

pea-sized objects using strong sound waves made by 64 mini-loudspeakers around the objects... waves, which are waves of high and low pressure that travel through a medium (媒介) such as air, can ……

;s too hot to study directly, so scientists looked at earthquake waves that traveled through the Earth... estimate (估计) if there are hollow (空心的) areas in the wall based on the sound waves the tap produces ……

different ultrasonic waves carry information about a sound.When the waves encounter a solid object... the original sound in the air around the object, so humans can hear it. If you step out of the beam, the waves ……

sounds.D. They change the direction of important sound waves. D. They change the direction of important sound waves.   4. What is Paragraph 5 mainly about?4. What is Paragraph 5 ……

Can you imagine what this galaxy might “sound” like? TUCHONGCan you imagine what this galaxy might “sound” like? TUCHONG当宇宙中的光变成音乐……当宇宙中的光变成音乐……Did ……

) center. According to the study, sound waves travel faster through materials with greater density (密度... possible when sound passes through metallic hydrogen (金属氢). This is hydrogen in a solid (固态的) metallic ……

听两遍,选择正确答案。1. Miss Gorgers was teaching her class ______.A. about sound B. about travel C. about time 2. Tom thought that electricity was ______.A. slower than sound waves B. faster than sound wavesC ……

energy (电能). The camera has two sensors (传感器). When sound travels through water, it creates waves...). The camera has two sensors (传感器). When sound travels through water, it creates waves ……

, according to a report published in Science magazine last week. Sound waves from the iceberg had... sounded like a swarm of bees or an orchestra warming up, scientists said. The sound was produced ……

and the strong nuclear force), gravity is relatively *feeble, making gravitational waves hard to detect. These waves cause tiny changes in the dimensions of whatever they pass through, explains a Cosmos ……

), forming sound waves.Sound is a type of energy that travels in the form of waves through mediums (介质) like... in the form of waves through mediums (介质) like air and water. These waves are produced when an object ……

of water, you’ll notice that waves follow it and spread out through the pool. The same thing happens when heavy objects move through space-time, causing it to stretch and contract, making ……

electricity is applied. It can produce opposite sound waves to cancel out noise, similar to noise-canceling headphones. Alternatively (或者), it can be held still when sound vibrations pass through, reflecting ……