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
20
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] 【L9】
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
negative charges
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3314708.html
相关试题推荐
Whatisthecommonopinionaboutageandwork?[br][originaltext]Thereis
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100
随机试题
Forthispart,youareallowed30minutestowriteashortessay.Youshouldsta
[originaltext]W:Hi,I’mnewhere,andIwaswondering[9]howIcouldgetalib
[originaltext]W:Youenjoygoingthroughsecond-handbookstores,don’tyou?It’
()是指项目活动或工作分解结构组成部分已完成的价值,用分配给该工作的预算来表
抢救有机磷农药中度中毒的药物是()A.阿托品+AchE复活药 B.毛果芸
治疗手足口病邪犯肺脾证,应首选的方剂是A.透疹凉解汤B.凉营清气汤C.宣毒发表汤
女,35岁,就诊时主诉近一年来易急躁,怕热多汗,易心悸、多食但易饥,体重减轻,吞
新设备投运后(____)发生的因建设质量问题导致的设备故障或异常事件,由建设管理
D
某桥梁主跨为40m预应力钢筋混凝土简支T梁,T梁施工采用预制吊装,预应力采用后张
最新回复
(
0
)