首页
登录
职称英语
If an object weighed one pound on the surface of the earth, how much would it we
If an object weighed one pound on the surface of the earth, how much would it we
游客
2024-10-12
25
管理
问题
If an object weighed one pound on the surface of the earth, how much would it weigh 4,000 miles above the earth? [br]
Because we can feel that things are heavy, we think of weight as being a fixed quality in an object, but it is not really fixed at all. [18]If you could take a one pound packet of butter 4,000 miles out from the earth, it would weigh only a quarter of a pound. Why would things weigh only a quarter as much as they do at the surface of the earth if we took them 4,000 miles out into space? [19]The reason is this: All objects have a natural attraction for all other objects; this is called gravitational attraction, but this power of attraction between two objects gets weaker as they get farther apart. When the butter was at the surface of the earth, [20]it was 4,000 miles from the centre, in other words the radius of the earth is 4,000 miles. When we took the butter 4,000 miles out, it was 8,000 miles from the centre, which is twice the distance. If you double the distance between two objects, their gravitational attraction decreases four times weaker. If you treble the distance, it gets nine times weaker. If you take it four times as far away, it gets sixteen times weaker and so on.
选项
A、because weight is a fixed quality in an object.
B、because they are far away from the centre of the earth.
C、because of the earth’s strong attraction for them.
D、because they are not taken away from the surface of the earth.
答案
C
解析
短文中说,万物之间都具有引力,即地球引力,据此可推断出地球与物体间的引力是我们感觉到物重的原因。
转载请注明原文地址:https://tihaiku.com/zcyy/3797757.html
相关试题推荐
Abodyweighs______fromthesurfaceoftheEarth.A、lessthefartheritgetsB、
Abodyweighs______fromthesurfaceoftheEarth.A、lessthefartheritgetsB、t
Themicroscopecan______theobject100timesindiameter.A、magnifyB、increase
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
随机试题
WhichofthefollowingisNOTmentionedbythespeaker?[br][originaltext]
[originaltext]EverymorningatDixieHeightsHighSchool,customerspourin
A.压力控制通气 B.呼气末正压通气 C.反比通气 D.同步间歇指令通气
抗拉强度为试样拉断前的最大负荷所对应的应力。
由四逆汤化裁为通脉四逆汤属于A.药量增减的变化 B.剂型更换的变化 C.药味
属于清算的主要程序的内容的是() Ⅰ.确定清算主体 Ⅱ.通知债权人
相对于髙层管理者来说,基层管理者更需要具备的管理技能是()。[2007年真题]
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
纳税人对税务机关作出下列行政行为不服的,可申请行政复议,也可以直接向法院提起行政
女,19岁。关节痛、脱发2个月,发热2周,伴下肢水肿。查体:双手冻疮样皮疹。血W
最新回复
(
0
)