float Physics

8 个科学问题 · 物理 Physics

本页目录

为什么冰会浮在水上?

Why does ice float on water?

水结冰时体积膨胀、密度变小,所以冰比液态水轻,能浮起来。
Freezing expands water and lowers its density, so ice is lighter than liquid water.
难度 进阶 · 适合 大众 CC BY 4.0 · 已核验 · Verified 2026-10-03 · 3 条独立证据
来源 · Source

Halliday、Resnick 与 Walker,《物理学基础》(第10版)

Halliday, Resnick & Walker, 'Fundamentals of Physics' (10th ed.)

#密度 #浮力 #结冰

潜水艇怎么控制自己下沉和上浮?

How does a submarine control sinking and rising?

它用压载水舱装水或把水排掉,改变自身的轻重,从而下沉或上浮。
It fills or empties ballast tanks with water to change its weight and so sinks or rises.
难度 入门 · 适合 小学高段(9-12) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

程守洙 江之永,《普通物理学》第七版,高等教育出版社,2016

Cheng Shouzhu and Jiang Zhiyong, General Physics, 7th ed., Higher Education Press, 2016

#潜水艇 #压载

救生圈为什么能托住人?

Why does a life ring hold a person up?

救生圈里装满空气,比水轻很多,能把人托在水面上。
A life ring is full of air and much lighter than water, so it holds a person at the surface.
难度 入门 · 适合 小学低段(6-8) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

程守洙 江之永,《普通物理学》第七版,高等教育出版社,2016

Cheng Shouzhu and Jiang Zhiyong, General Physics, 7th ed., Higher Education Press, 2016

#救生圈 #浮力

大船为什么浮在水上?

Why does a big boat float on water?

船的身体里装了很多空气,整体比水轻,就浮在上面。
A boat's body holds lots of air, so altogether it is lighter than water and floats.
难度 入门 · 适合 幼儿(3-6) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

程守洙 江之永,《普通物理学》第七版,高等教育出版社,2016

Cheng Shouzhu and Jiang Zhiyong, General Physics, 7th ed., Higher Education Press, 2016

#船 #浮力

为什么有的东西沉、有的东西浮?

Why do some things sink while others float?

比同体积水更密的东西往下沉,比水轻的被水托住浮起来。
Things denser than the same volume of water sink; lighter ones are held up by the water and float.
难度 入门 · 适合 小学高段(9-12) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

程守洙 江之永,《普通物理学》第七版,高等教育出版社,2016

Cheng Shouzhu and Jiang Zhiyong, General Physics, 7th ed., Higher Education Press, 2016

#密度 #浮力

木头为什么浮在水上?

Why does wood float on water?

木头比同体积的水轻,水就把它托在上面,不会沉。
Wood is lighter than the same amount of water, so the water holds it up instead of sinking it.
难度 入门 · 适合 小学低段(6-8) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

程守洙 江之永,《普通物理学》第七版,高等教育出版社,2016

Cheng Shouzhu and Jiang Zhiyong, General Physics, 7th ed., Higher Education Press, 2016

#木头 #浮力

潜水艇怎么沉到水底?

How does a submarine sink to the bottom?

潜水艇装满水变重了,就慢慢沉到水里。
A submarine fills with water to become heavy and slowly sinks down.
难度 入门 · 适合 幼儿(3-6) CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source

程守洙 江之永,《普通物理学》第七版,高等教育出版社,2016

Cheng Shouzhu and Jiang Zhiyong, General Physics, 7th ed., Higher Education Press, 2016

#潜水艇 #浮力

为什么洗澡时小鸭子玩具总浮在水面上?

Why does my rubber ducky always float in the bath?

小鸭子里藏着一个秘密——空气!它的橡胶壳里是空心的,比同样大小的水轻得多。水会托起所有比自己轻的东西,所以小鸭子稳稳漂着,石头那样重的小家伙就只能沉底啦。
Your duck hides a secret — air! Its hollow body weighs much less than the water it pushes aside, and water lifts anything lighter. So the duck floats while heavy pebbles sink to the bottom.
难度 入门 · 适合 幼儿(3-6) CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source

《十万个为什么》第六版物理分册,少年儿童出版社,2013

Ten Thousand Whys: Physics volume, 6th ed., Juvenile and Children Publishing House, 2013

#漂浮 #重量 #玩水