首页
登录
职称英语
Lightning Cloud-to-ground lightning bolts are a common phenomenon, about 100
Lightning Cloud-to-ground lightning bolts are a common phenomenon, about 100
游客
2023-12-29
51
管理
问题
Lightning
Cloud-to-ground lightning bolts are a common phenomenon, about 100 strike Earth’s surface every single second, yet their power is extraordinary. Each bolt can contain 【L1】______volts of electricity.
This enormous 【L2】______is caused by an 【L3】______between positive and negative charges. During a storm, 【L4】______of rain, ice, or snow increase this imbalance and often negatively charge 【L5】______storm clouds. Objects 【L6】______, like steeples, trees, and the Earth itself, become 【L7】______—creating an imbalance that nature seeks to remedy 【L8】______between the two charges.
A step-like series of 【L9】______, called a stepped leader, works its way incrementally downward 【L10】______a storm cloud toward the Earth. Each of these segments is about 46 meters long. When the lowermost step comes within 46 meters of a positively charged object it is met by a 【L11】______ of positive electricity, called a streamer, which can 【L12】______ through a building, a tree, or even a person. The process forms a channel 【L13】______ electricity is transferred as lightning.
Some types of lightning, including the most common types, never leave the clouds but 【L14】______ between differently charged areas 【L15】______. Other rare forms can be 【L16】______ extreme forest fires, volcanic eruptions, and snowstorms. Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still 【L17】______.
Lightning is extremely hot—a flash can 【L18】______around it to temperatures five times hotter than the sun’s 【L19】______. This heat causes surrounding air to rapidly expand and vibrate, which creates the 【L20】______we hear a short time after seeing a lightning flash. [br] 【L16】
Lightning
Cloud-to-ground lightning bolts are a common phenomenon—about 100 strike Earth’s surface every single second—yet their power is extraordinary. Each bolt can contain up to one billion volts of electricity.
This enormous electrical discharge is caused by an imbalance between positive and negative charges. During a storm, colliding particles of rain, ice, or snow increase this imbalance and often negatively charge the lower reaches of storm clouds. Objects on the ground, like steeples, trees, and the Earth itself, become positively charged—creating an imbalance that nature seeks to remedy by passing current between the two charges.
A step-like series of negative charges, called a stepped leader, works its way incrementally downward from the bottom of a storm cloud toward the Earth. Each of these segments is about 46 meters long. When the lowermost step comes within 46 meters of a positively charged object it is met by a climbing surge of positive electricity, called a streamer, which can rise up through a building, a tree, or even a person. The process forms a channel through which electricity is transferred as lightning.
Some types of lightning, including the most common types, never leave the clouds but travel between differently charged areas within or between clouds. Other rare forms can be sparked by extreme forest fires, volcanic eruptions, and snowstorms. Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still puzzles scientists.
Lightning is extremely hot—a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
选项
答案
sparked by
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3314715.html
相关试题推荐
______mostcommonkindoffuelusedby______peasantsinourdistrictiswood.A、a
______umbrellasarecommonlyusedtoprotect______peoplefrom______rain.A、/...th
WorldWarIIiscommonlyacknowledged______someofthe20thcentury’smostnotab
______,CharlesDarwindidmuchtodisprovecommontheoriesaboutbiologicalevo
It’scommonlyacknowledgedthatinfantmortalityhasdeclinedbecauseofrecent
______alanguagefamilyisagroupoflanguageswithacommonoriginandsimila
Acommonquestionthatpeopleaskastorywriteriswhetherornothehasexperi
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
随机试题
[originaltext]M:Hello,mayIspeaktoMr.Hebert?W:Sorry,heisinameeting.
【B1】[br]【B6】[originaltext]Therearesomeproblemsforinternationalstude
Pregnantwomenwhosufferlapses(忘却)inmemoryorconcentrationmaynolong
简述最近发展区。
《封神演义》的作者,一般认为是()A.甄传 B.许仲琳 C.熊大木 D.
气缸中有一定量的氦气(视为理想气体),经过绝热压缩,体积变为原来的一半,气体分子
计算机网络机房建设过程中,单独设置接地体时,安全接地电阻要求小于( )。A.1
从生物学角度来讲,下列骨髓配对移植成功概率最大的是: A.如上图所示 B.如
利率挂钩结构性金融衍生品的种类有()。 A.与利率正向挂钩产品B.利率期货
某医师与某药厂达成协议,在开处方时使用了该厂生产的药品,并收受了该厂给予的提成。
最新回复
(
0
)