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
5
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] 【L4】
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
colliding particles
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/3314703.html
相关试题推荐
Financialconsultantsacknowledgethatthevalueofcommonstockisinherentlyc
Heart________ismuchmorecommonthesedaysthanitwaseventenyearsago.A、sur
Whatisthecommonopinionaboutageandwork?[br][originaltext]Thereis
Whatisthecommonopinionaboutageandwork?[br][originaltext]Thereis
Whatisthecommonopinionaboutageandwork?[originaltext]Thereisawide
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
随机试题
Trainingtobecomeabarristerorsolicitorisacompetitiveandexpensiveb
Parentswhosmokeoftenopenawindoworturnonafantocleartheairfor
ISO9000族标准的特点是A.强调系统化管理 B.以顾客为主 C.以治疗为
建筑供暖系统按按热媒种类分类()A.热水采暖系统 B.蒸汽采暖系统 C.热风
下列商业银行贷款中,只收取手续费不承担贷款风险的是()。A.科技开发贷款
热压灭菌法所用的蒸汽是A.流通蒸汽 B.饱和蒸汽 C.含湿蒸汽 D.过热蒸
孕妇,张女士,28岁,妊娠35周,小腿及踝部水肿,护士对其健康教育的内容,下列不
1000kV变压器接地电流大于()mA应予注意,其他电压等级的变压器接地电流大于
下列关于家访的做法不恰当的是( )。A、忌“指导”,对教育问题不要给家长建
公正不仅指形式上的类似,更强调公正的() A.本质 B.内容 C.基础
最新回复
(
0
)