Sound is produced by vibrations. When an object vibrates, it makes sound. How is sound produced? A. By colors. B. By vibrations. C. By shapes. 相关知识点: 试题来源: 解析 B。解析:声音是由振动产生的,B 选项正确。A 选项颜色和声音产生无关,C 选项形状也不是声音产生的原因。
Sound iscreated 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 area few different sounds....
→ It might be cause either by an unbalanced load of laundry, or some foreign substance. The washing tub rotates at a quick speed during a spin cycle. If a load of laundry is small(i.e. one or two pairs of jeans) or big(i.e. several blankets), the tub may become unbalanced...
a由于运输震动或外力引起灭弧罩安装位置发生变化 Because transports vibrates or the external force causes the extinguishing of arc cover to install the position to change [translate] a我想要你们所有人都来参加晚会 I want you to possess the human all to attend the party [translate] aI request you ...
thecane.Itworkedout! HowtheCaneWorksThecanesendsoutsoundwaves.Whenanechoissentback,thetopofthecanevibrates(震动).Thishelpstheperson 9 thecaneknowhowfarawayanobjectis.Heorshewillalsoknowhowbigtheobjectis. The 10 ofthecaneshowsthatnatureisreallywheregreatideascomefrom.()1.A.useful B.interestingC.imp...
But first, let's start by breaking down the basics. What is resonance in music? Resonance occurs when an object, such as an instrument, speaker cabinet, or even your room, vibrates in response to sound waves of a certain frequency. While resonance can be a good thing that enriches your...
It worked out!? How the Cane Works The cane sends out sound waves.When an echo is sent back,the top of the cane vibrates(震动).This helps the person 9 the cane know how far away an object is.He or she will also know how big the object is.? The 10 of the cane shows that nat...
the literary form of autobiography(北二外 2008 研) Key: the literary form of autobiography:An autobiography is a person‘s account of his or her life. It is generally written in the first person, with the author speaking as ―I‖. Autobiography presents life events as the writer views them...
This makes it difficult to read tiny text being mouse-dragged, since 6-to-8 point text vibrates too much during dragging. 3. Set mouse to 1000Hz. Drag window left/right while reading text in window at same time. Even smoother at ~1920 pixels/second. The mouse microstutters are now ...
Answer to: Write a paragraph explaining what the Doppler Effect is and the different effects it has on the observed frequency when the source of...