网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
填空题
小丽用重为3.2N的物体A做了如图a所示的实验.该实验验证了猜想____是正确的,可得出:在同种液体中,物体排开液体的体积越大,受到的浮力____.实验中,物体A浸没时受到的浮力为____N,方向____.
参考答案
参考解析
解析:
比较甲、乙、丙三图可知,随着物体浸在液体中的体积的增大,物体排开液体的体积增大,弹簧测力计示数减小,说明物体受到的浮力变大,猜想一是正确的;A物体浸没时的拉力为1N,则A物体受到的浮力为3.2N-1N=2.2N.方向竖直向上.
比较甲、乙、丙三图可知,随着物体浸在液体中的体积的增大,物体排开液体的体积增大,弹簧测力计示数减小,说明物体受到的浮力变大,猜想一是正确的;A物体浸没时的拉力为1N,则A物体受到的浮力为3.2N-1N=2.2N.方向竖直向上.
更多 “填空题小丽用重为3.2N的物体A做了如图a所示的实验.该实验验证了猜想____是正确的,可得出:在同种液体中,物体排开液体的体积越大,受到的浮力____.实验中,物体A浸没时受到的浮力为____N,方向____.” 相关考题
考题
单选题We did a marketing study for yellow telephone boxes and found the _____ too strong.A
resistanceB
contradictionC
assistanceD
evolution
考题
单选题From the passage we learn that Jim Thorpe was born in _____.A
IndiaB
PennsylvaniaC
OklahomaD
Sweden
考题
单选题The manager required that all the employees _____ at the office before 9:00 in the morning.A
will arriveB
arriveC
arrivedD
have arrived
考题
单选题What can be the best title for the text?A
Americans work more and vacation less.B
Where Americans go on their summer vacations.C
Different places for summer vacations.D
Not all Americans take summer vacations.
考题
单选题The big earthquake is still on. _____ is badly needed in the mountain villages.A
Much clothingB
Lots of suitsC
A good many clothD
A lot of clothes
考题
填空题火箭点燃后,尾部的火焰如果直接喷到发射台上,发射架要熔化.为了保护发射架,在发射台底建一个大水池,让火焰喷到水池中,这是利用了水汽化时要____,使周围环境温度不致太高,我们看见火箭刚点燃时周围大量的“白气”是由于水先____后____形成的.请你也举出一个生产技术或生活中利用物态变化来调整环境温度的例子:____.
考题
单选题下列做法符合安全用电常识的是( ).A
用电器的三脚插头也可插入两孔插座中使用B
使用试电笔时,金属体笔尖应接触被测导线,手指按住金属体笔尾,不能碰到金属体笔尖C
有人触电时应迅速用手把他拉离电源D
家庭电路中开关接在火线或零线上都可以
考题
单选题By the time you come to see me next month, I _____ my term paper.A
have completedB
completeC
am completingD
will have completed
考题
多选题习近平总书记号召全党同志树立和发扬“三严三实”的作风,“三严”是指严以修身、严以用权、严以律己,“三实”是指( )。A作风要实、做事要实、为人要实B谋事要实、创业要实、做人要实C为官要实、办事要实、做人要实
考题
单选题In Michelle’s country over ______ of the students are too fat.A
75%B
a quarterC
a halfD
15%
考题
单选题According to School Policy, visitors have to ______ when entering the school.A
hand in a noteB
call at 524—9752C
check in at the officeD
telephone to the school
考题
单选题It was hard for him to learn English in a family, in which _____ of the parents spoke the language.A
noneB
neitherC
bothD
each
考题
单选题As a rule, the workers are paid _____.A
at the hourB
by the hourC
for an hourD
in an hour
考题
单选题Paragraph 1 mainly talks about _____.A
the reasons for successB
the meaning of successC
the standards of successD
the importance of success
考题
单选题When did Sarah realize that she had also given Billy her diamond ring? ______A
On February 9th, 2013.B
On February l0th, 2013.C
On February 18th, 2013.D
On February 22nd, 2013.
考题
单选题Why do organizers (组织者) advise students to live with American families?A
Students are not rich enough to live in hotels.B
Students can have meals with American families.C
Students can experience life in the USA.D
Students can teach American how to cook Chinese food
考题
单选题A
thoughtsB
failureC
questionsD
problems
热门标签
最新试卷