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
12
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] 【L8】
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
by passing current
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3314707.html
相关试题推荐
It’scommonlyacknowledgedthatinfantmortalityhasdeclinedbecauseofrecent
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
Animationmeansmakingthingswhicharelifelesscomeliveand【S1
We’renowwitnessingtheemergenceofanadvancedeconomybasedoninformati
下列场所所采用的照明技术措施,哪项是最节能的?()A.办公室采用普通荧光灯
关于可摘局部义齿基托蜡型的制作要求,下列哪项不正确()A.舌侧基托止
(2016年真题)封闭式基金()公布基金单位资产净值。A.每日 B.每周
抗惊厥药扑米酮的一种活性代谢产物是A:苯巴比妥 B:甲基多巴 C:乙琥胺
《变电运维管理规定第4分册隔离开关运维细则》:隔离开关接地引下线标志无脱落,接地
化肥污染通过食物严重影响人们的健康,因而被视为是农药的一种污染,尤其是大棚内栽种
动脉皮瓣是指A.皮瓣内包含有一对知名血管 B.无知名的血管供血,其长宽比例要受
肾细胞癌最常见的病理组织学类型是A.乳头状癌 B.透明细胞癌 C.嫌色细胞癌
最新回复
(
0
)