解析 B。解析:文章中提到“When an object is placed in water, it experiences an upward force called buoyant force. If the buoyant force is greater than the weight of the object, the object will float.”,所以使物体漂浮的力是浮力。反馈 收藏 ...
What makes an object float? Water Weight An object placed in water that rises to the surface is said to float on the top. There is a scientific principle that explains this that is rooted in physics. Answer and Explanation: Any object that has less density than water will float when put...
A. The object sank in the water. B. The object floated on the water. C. The object disappeared in the water. D. The object was stuck in the water. 相关知识点: 试题来源: 解析 B。题干是物体开始在水上漂浮。A 选项表示物体沉入水中;B 选项表示物体漂浮在水上;C 选项表示物体在水中消失了...
happens, will float 相关知识点: 试题来源: 解析 [答案]A [解析] [分析] [详解] 句意:——如果你把油倒在水里会发生什么?——它会漂浮上来。 考查If条件从句。根据“if you pour oil on water”可知,是条件状语从句,因此主句用一般将来时“will+动词原形”,结合选项,A符合句意。故选A。
Buoyancy(浮力): What makes a boat float? What are the characteristics of water that help a boat to float? How do boat design and construction make it suitable for sea voyage? This educational program focuses on the science of buoyancy and uses construction skills to judge the students’ abili...
题目Jellyfish can float in the water. What helps them do this? A. Their tentacles B. Their light body C. Their strong muscles D. Their sharp teeth 相关知识点: 试题来源: 解析 B。解析:水母能在水中漂浮是因为它们身体轻。选项 A 触手不是漂浮的原因;选项 C 强壮的肌肉不对;选项 D 它们没有...
1.WhatmakesRomaniadifferentfromtheother places? A.Nicehostels. B.Deliciousfood. C.Less-visitedtowns. D.Cheaptransportation. 2.Whatmaytheauthorrecommendfortravelling inSouthAfrica? A.Driveyourowncars. B.Cookyourownlunches. C.Stayinexcellenthotels. D.Finduniquetravelpartners. 3.Whatfeaturedothefourdestin...
A. The coin will float. B. The coin will sink. C. The coin will disappear. D. The water will boil. 相关知识点: 试题来源: 解析 B。硬币的密度大于水,所以放入水中会下沉,A 选项硬币会浮起来不符合实际,C 选项硬币会消失不可能,D 选项水会沸腾与放入硬币无关。反馈...
Exercise is an important part of every astronaut’s daily life to prevent muscle loss (肌肉萎缩). Usually, astronauts exercise two hours every day. Lifting 200 pounds on the earth may be a lot of work. But lifting t...
Would this object float or sink in water? Explain Initially 10.0 mL of water was placed in a graduated cylinder, and then a solid metal was immersed in the water in the graduated cylinder. At this point, the volume of water was read as 15.5 mL. If the mass of the solid is 9.25 g,...