Sound is a form of energy produced by the vibration of matter. Sound is a compressional or longitudinal wave Ex. Spring The particles of the substance vibrate back and forth along the path that the sound wave travels Sound is transmitted through solids, liquids, and gases (air). What is so...
根据第一段前两句“Sound is a form of energy that can't beseen. We can sense sound.”可知声音是一种看不见的能量形式,但能感觉到,C项错误。根据第四段第三、四“If youput a few grains of rice on the drum gently. The vibrations maycause the rice to jump.”可知轻轻地在鼓上放几粒米。
7.Sound is a form of energy transfer and we could define loudness in terms of the energy per unit of time or power output of the sound,but it wouldn’t give the complete picture.Sound waves travel outward like balloons expanding around their source.The sound’s power is distributed on ...
Sound The Facts Sound … 1. is a form of energy produced & transmitted by vibrating matter. 2. travels in longitudinal waves. 3. travels more quickly. Characteristics of waves.. The Nature of Waves What is a wave? A wave is a repeating disturbance or movement that transfers energy through...
故选B。2.细节理解题。根据“Sound is made when something vibrates”可知声音是通过振动产生。故选A。3.主旨大意题。根据“Light, heat and sound are forms of energy. Here is an introduction to them.”以及本文内容可知本文主要介绍了和光、热和声音有关的信息。故选D。
Sound is a kind of energy that you can hear. Sound is made when something vibrates(振动). When you talk or sing,put your hand on the side of your neck. Then you will feel your neck vibrating. When you hit a drum, the drum and the air around it vibrate. When the vibrating air ...
根据Sound is made when something vibrates(声音是在物体振动时发出的)可知声音是在物体振动时发出的。故选A。(3)主旨大意题。根据Light,heat and sound are forms of energy.Here is an introduction to them.(光、热和声音是能量的形式。下面是对它们的介绍。)可知是介绍了光、热和声音...
The fans can produce___ energy.A.soundB.heatC.movingD.light 相关知识点: 试题来源: 解析 sound 声音;heat 热;moving 移动;light 光。根据语境"风扇能产生___能。"和物理知识。可知风扇在转的时候能产生动能,因此"moving"符合题意。故选:C。反馈 收藏...
A. Sound energy B. Light energy C. Heat energy D. Electrical E. nergy 相关知识点: 试题来源: 解析 A。当铃响的时候,产生的是声音,声音是一种能量形式,即声能。B 选项光能是由光产生的能量;C 选项热能是由温度差产生的能量;D 选项电能是由电荷流动产生的能量。反馈...
The form of energy called sound is produced when matter moves or vibrates. The vibrations are transferred to another medium, usually the air, and travel through it as sound waves. You hear a sound when its vibrations reach your eardrum, causing it to vibrate. The pitch of a sound is dire...