Sound is a wave that is produced by objects that are vibrating. It travels through a medium from one point, A, to another point, B. As is true of all types of waves, specific behaviors, properties, and characteristics apply to sound waves. Similar to the slinky wave described in the ...
1hat is sound?Sound isWcreated when an objectvibrates(振动).Thevibrations travel in waves.Sound waves reach our ears.The ears send a message to the brain.That's how wehear different sounds!A sound can be loud or quiet.Itcan have a high pitch(音高)or a low pitch.Here are9a few diffe...
Student: Are you going to talk at all about the difference between radio waves and sound waves? Professor: Uh, Ok. That might be a good place to start actually. Sound waves are mechanical in nature, right? They can only originate and spread in places where there's some dense physical me...
23. What can we learn from this passage? A. Sound waves are very important to help the potatoes grow. B. Potatoes like the men. C. Potatoes like the women. D. Potatoes can grow without light and water. 相关知识点: 试题来源:
sharing the story behind the song’s creation. She revealed that it was conceived in late 2023, during a turbulent time in her life. At the time, she was going through a “deep breakup” and experiencing intense emotional swings. She wrote...
Step by step video & image solution for (a) What is sound? What type of waves are sound waves in air? (b) Describe an experiment to show that sound cannot pass through vacuum. by Physics experts to help you in doubts & scoring excellent marks in Class 9 exams.Updated on:21/07/2023...
A. sheep bleating B. waves crashing C. duck quacking D. pig oinking 相关知识点: 试题来源: 解析 A。解析:听到的声音是羊叫还是海浪声,根据题干中的“Is it a sheep bleating or the waves crashing?”可知,答案在 A 和 B 中。C 选项鸭子叫和 D 选项猪叫与题干不符。题干明确提到了羊叫和海...
1.whispers v.私语,低声说2.snores v.打呼噜,打鼾3.music n.音乐,乐曲4.hear v.听,听到,听见5.wind n.风6.waves n. 波浪(wave的名词复数)翻译:我听到了鸟儿的声音。我听到了下雨的声音。我听到了风吹的声音。我听到了海浪的声音。我听到了音乐。我听到了汽车的声音。我听到了低语。我听到了鼾声。
A. All sound is not good. B. It is difficult for people to stay in a very quiet place. C. Your heart will beat fast when you stay in a quiet place. D. You can't hear your breathing and heartbeat when you are quiet. 相关知识点: ...
Sound waves are longitudinal waves that travel through a fluid. Longitudinal waves are waves where particles of the medium vibrate back and forth in the direction of the wave (unlike transverse waves where particles oscillate up and down perpendicular to the direction of the wave). This particle ...