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 is produced by vibrations. What is the speed of sound in air? A. 340 meters per second. B. 340 kilometers per hour. C. 3400 meters per second. D. 3400 kilometers per hour. 相关知识点: 试题来源: 解析 A。解析:声音在空气中的传播速度是 340 米每秒。选项 B、C、D 速度错误。
To answer the question "Sound is produced by vibrations of ... located in the ...", we need to identify the correct terms to fill in the blanks.1. Identify the Components of Sound Production: -
Sound is produced by[A] vibrations of an object passing through the air.[B] spreading of wSound is produced by [A] vibrations of an object passing through the air. [B] spreading of waves after a rock being tossed into a pond. [C] thunders. [D] a flying plane.查看答案更多“Sound i...
But what if our own planet was hit by a comet? The year is 2094. It has been announced that a comet is heading towards the Earth. Most of it will miss our planet, but two fragments will probably hit the southern part of the Earth. The news has caused panic. On 17 July , a ...
2Sound is caused by,声音是由振动产生的。3 Some soundare too high for humans to hear.有的声音频率过高,人类无法听见。4Changing thealters the quality of a sound.改变声调就会改变音质。5 A whistle makes a sound with a high,口哨发出的声音音高较高。6 Some planes can fly faster than theof ...
is more general in application, being used for anything within earshot: the sound of running water. Noise, caused by irregular vibrations, is more properly applied to a loud, discordant, or unpleasant sound: the noise of shouting. Tone is applied to a musical sound having a certain quality,...
Rarefaction is the low pressure part of the sound wave while compression is the “pushing” part of the wave. A changing distance to the object generating the sound affects the frequency and pitch; this is the Doppler effect.[1] Sympathetic vibrations of an object are caused by sound and ...
sound - mechanical vibrations transmitted by an elastic medium; "falling trees make a sound in the forest even when no one is there to hear them" mechanical phenomenon - a physical phenomenon associated with the equilibrium or motion of objects ultrasound - very high frequency sound; used in ul...
Is Sound Just Vibrations?When we consider what defines sound in a physics context, it can be tempting to assume sound is just vibrations. While partially true, sound is much more complex than simple vibrations. When a sound source vibrates, it produces sound energy that travels through particle...