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		Why is the air pressure on Venus so high?	2022-11-24 16:46:35

Why is the air pressure on Venus so high?

The temperature of Venus is 462 degree C, less than three times of the earth’s temperature, in Kelvin. The radius of Venus is slightly smaller than the earth’s. But the atmosphere pressure is ninety times higher. How is it possible?

The state equation of ideal gas is PV = nRT. Ignoring the constant R, the equation can be rewritten as P = (n/V)T. n/V, the density of the gas, might be similar on Venus and the earth, for the gravitational forces are similar on Venus and the earth. When T is three times higher, we might estimate P is roughly three times higher.

What is wrong with my reasoning? I could not understand why the atmosphere pressure is so high on Venus.

Reference for relevant data

https://scitechdaily.com/from-temperate-world-to-acidic-hothouse-how-massive-volcanism-may-have-altered-venus-climate/


			文章评论

作者：jingchen 回复战斗在温哥华的岁月

留言时间：2022-11-24 18:39:38

多谢指教！


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作者：战斗在温哥华的岁月

留言时间：2022-11-24 18:04:25

金星大气层厚度大约为250公里。
地球大气层厚度则大于1000公里。

金星大气层的密度约是地球大气层的93倍。这就是大气压强比地球高90倍的原因。

那么，金星大气层为什么这么薄这么密？

那是因为她的自转比地球慢，造成离心力低，小于地球，则重力也相应增加。大气压强比地球高就理所当然啦。


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【诗词（四）】

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· Winter night in the north

【诗词（三）】

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· Social structures: A perspecti

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· When an electron falls to a pr

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【诗词（二）】

· I’d rather

· 池塘里的污泥

· Over and under

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【语言（三）】

· 相似的单词，不同的意思

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· 什么是不够

· Easter: 词的来源

· 论所谓的正能量 (On being posit

· Terr 是土地

· Radical 的意思是什么？

· 努力的奴隶

· 风筝：孩子离家

· 落日：致老去的人们

· 杜达尔和玛丽亚

· Driving crazy

· 燃烧和发烧

· 满月的冬夜

· 献给空巢的父母

· Burning and burn out

【健康（三）】

· Mentally stimulating

· On obsessive compulsive disord

· 吃盐和生育

· Ginger and gingerly

· Principle Based Medicine

· Why we need pain?

· 关于自闭症

· 健康的定义

· 针灸的原理

· 情感的守恒定律

【科学（三）】

· 数学及其在社会科学中的应用

· 为什么光线弱的地方会觉得浪漫？

· 美是平均，美是不变的性质

· 颜色和温度

· 简洁就是美

· 栖息之地：健康的树和濒死的树

· 落红不是无情物，化作春泥更护花

· 为什么肥沃的土地上很难找到先锋

· 不平等，效率和系统维护成本

· 生物学的统一理论

【语言（二）】

· 我，倭，和，we

· 鹪鹩，娇娆，wren, 人，文

· 牡丹，Botan, Botany

· 人多则移

· 英语中的几个象形词

· 趣味英语:一个不引人注意的前缀

【科学(二）】

· 基因突变不是完全偶然的

· 生物学和生态学的结合

· Energy consumption and cost

· 人类的平均寿命能到一百岁吗？

· 蝴蝶效应并不存在（兼论偏微分

· 科学与经济学的统一

· 意识: 一个经济学和物理学的理论

· 诺奖得主年龄的变迁

· 学科细分: 社会停滞和衰退的表征

【健康(二）】

· On cortisol and other drugs

· 为什么负氧离子有益健康

· 吃冰和减肥

· 实用生理学

· 为什么晒太阳有好处?

· 为什么练功经常用圆型姿式？

· 脉搏中包含多少信息？

· 外科手术不伤身体吗？

· 头痛医脚

· 怎样才能改善内脏的功能

【人口(二）】

· 政府的法律和自然的法律

· 出生率，平均寿命，生活水平和社

· Holmes stories: The number of

· 个体年龄和社会年龄

· 多子多福

· 人口塌陷: 真正的悲剧

· 华人的高智商和低生育率

· 走出非洲

· 生命就是竞争

· 什么是文化

· 聪明的代价：亚当和夏娃的故事

· 为什么大道至简

· 人口问题文章的一个汇总

· 人口警报?

· 人口红利和人口投资

· 多生孩子: 靠政策,还是靠自己?

· 华而不实和春华秋实

· 劝君莫惜金缕衣，劝君惜取少年时

· 政府越大,出生率越低

· 关于全民基本收入

· 六四还是六三？

· Iron and blood

· 华人参政不够踊跃吗？

· 谁得益于大政府？兼论美国大选

· 印一百元假钞是犯罪，印一万亿真

· 量化宽松和猪肉注水

· 百年大势和英国脱欧

· 龙图腾的含义

· 个体的肥胖和社会的肥胖

· 在什么年纪，做什么事情

· 早晨出行和下午出行

· 男学生在哪里？

· 贱和基本

· 少数的重要性

· 效用函数是什么样子的？

· 经济学理论不应该建立在拓扑学基

· 谁是二十世纪最伟大的经济学家？

· 谁是十九世纪最伟大的经济学家？

· 非平衡态经济学理论简介

· 凯恩斯主义适用的环境

· 从日本的负利率谈起

· 关于利率

· 生产过程各要素之间的关系

· 平衡态和非平衡态经济学

【加拿大】

· 一个登山爱好者的历险（附视频

· 海达圭游记

· 红河谷歌词的变迁

· 洄游的三文鱼

· 碧西(BC)的风景和阿省的风景

· 中加教育比较

· 决定和 decide

· 仇的两种读法

· 小儿子教我读书

· 汉语单词的起源

· 舒服和束缚

· 姓张的人为什么这么多？

· 纽，妞，丑，new, 牛

· 姜太公的故事

· 语言的产生和演变

· 科学研究：缺的是钱吗？

· 数学：应用和乐趣

· 汉字和科学研究

· 社会生物学与社会

· 有趣的化学

· 蒲公英和科学研究

· 当代没有科学大师吗?

· 数学,美和现实

· 现实世界：理解数学的金钥匙

· 按摩脚底为什么这么重要？

· 中医的疗效（续）

· 从蛋白质的不同分解途径看痛风的

· 中医的疗效

· 从哮喘的治疗谈预防

· 实用生理学

· 什么是酸性食物？

· 肥胖和内脏功能

· 呼吸的方法

· 关于抑郁

【科学与经济】

· 阅读The Unity of Science and E

· 信息和熵的等价性

· 知觉的简单和数学的简单

· 一流的研究: 真那么难吗?

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