Why does ice float on water? A. Ice is lighter than water B. Ice is colder than water C. Ice is harder than water D. Ice is smoother than water 相关知识点: 试题来源: 解析 A。解析:冰的密度比水小,所以冰能浮在水面上。冰的温度、硬度、光滑程度都不是其能浮在水面上的原因。
A. Because it is heavy. B. Because it is lighter than water. C. Because it is made of wood. D. Because it is big. 相关知识点: 试题来源: 解析 B。解析:文章中提到“a wooden block is lighter than water and it can float”,所以木块能浮在水面上是因为它比水轻。反馈...
Why do things float in water? Objects are made up of very tiny molecules. Molecules can be packed in close together like in a rock or more spread out like in bubble wrap. The positioning of molecules affects the density of an object. Objects with tightly packed molecules are more dense th...
Dthe mass of water displaced is greater than the mass of the ship Submit Dremains constant Submit Why does ice float in water ? View Solution Why an iron boat can float in water, while an iron cube cannot ? View Solution View Solution ...
18.He wants to know why empty glass bottles can float(漂浮) on the water. He should ask his C teacher for help. A. music B. art C. physics D. maths 相关知识点: 试题来源: 解析 答案见上18.C[提示:考查名词辨析。 句意:他想知道 为什么空玻璃瓶会浮在水面上。 他应该向他的 老 师寻求...
Why does a needle need to be dry to float on water? Explain in detail. Explain why the velocity of sound is greater in solids than in gases. Why is water droplet spherical? Which property causes water to form droplets? Explain how and why the velocity of an object changes when it falls...
Why might an egg float in saltwater but sink in fresh water?
asend the hat off 送帽子[translate] aOne day Ben said to himself ,"Why can't the wind help me float across the water?And I'm going to fly . Ben got his big kite 一天本对他自己认为, “为什么风不能帮助我横跨水漂浮?并且我飞行。 本得到了他的大风筝[translate]...
Why does ice float in water? - George Zaidan and Charles Morton 1,857,128 Views 27,027 Questions Answered TEDEd AnimationLet’s Begin… Water is a special substance for several reasons, and you may have noticed an important one right in your cold drink: ice. Solid ice floats in ...
Mr. Allen held out a glass of water with three ice cubes in it. “Why do things float?” he asked the class. No one said a word. The whole class was 1 . “Anyone?” Mr. Allen smiled at his students. “Let’s brainstorm some answers.” He swirled (旋动) the glass gently....