compressed-aid是什么意思

shiran12022-10-04 11:39:541条回答

已提交，审核后显示！提交回复

a massless spring is compressed between two blocks,one of ma a massless spring is compressed between two blocks,one of mass M and the other of mass 5M,on a frictionless horizontal table.If this system is released from rest the potential energy in the spring is converted into kinetic energy of the blocks such that the block of mass M gets ( )of the total energy? A.5/6 B.4/5 C.1/2 D.1/5 E.1/6 羽扇纶巾19811年前1: ustcfeedfish 共回答了17个问题 | 采纳率94.1%

D
first,the forces and time exerted on both blocks are the same,thus both blocks got the same impluse(Ft) at the moment the potential energy of the spring becomes 0.According to the Impluse-momentum theorem,the change in momentum equals to the impluse(p=Ft).the momentum p=mv and the kinetic energy KE=0.5mv^2,so KE=0.5pv.
because both blocks got the same force,according to Neton's second law,a=F/m,the ratio of the accelaration of the tow blocks would be 5M:M=1:5
because the time is the same,the ratio of the final velocity of the two blocks is 1:5
and the ratio of the Kinetic energy is equal to te ratio of the final velocity is also 1:5
so the answer is D

1年前查看全部

英语翻译The compressed air pipe section immediately upstream of 英语翻译 The compressed air pipe section immediately upstream of the engine has to be removed and visually inspected. 超人归来1211年前2: thankvv 共回答了21个问题 | 采纳率90.5%

引擎即刻逆流压缩空气管的部分,已经移除并经过目测检查.

1年前查看全部

请教这个“bar”的含义to generate the needed compressed air (6 bar)请问这 请教这个“bar”的含义 to generate the needed compressed air (6 bar) 请问这个bar是什么意思?好像是个单位? nevy9991年前1: gaslb125 共回答了16个问题 | 采纳率81.3%

kPa 压力的单位

1年前查看全部

Compressed air requirement ：200Nm³怎么翻译啊~ ghifbsn1年前6: 海里小石共回答了17个问题 | 采纳率82.4%

压缩空气要求:200标立

1年前查看全部

我想问动词以浊辅音和元音结尾+ed不都是读/id/的吗?但为什么有些词像compressed,incensed等后面又读 我想问动词以浊辅音和元音结尾+ed不都是读/id/的吗?但为什么有些词像compressed,incensed等后面又读/st/ X灵魂的碎片X1年前2: 简单1208 共回答了15个问题 | 采纳率93.3%

我印象中动词以浊辅音和元音结尾+ed 是读/d/的,而以清辅音结尾的就读/t/.
你说的compress是以清辅音/s/结尾,所以这个单词加ed后应该发/t/.

1年前查看全部

真空袋英文怎么说vacuum compressed 能翻译成真空压缩袋吗 yangchencheng1年前3: wangchong1003 共回答了19个问题 | 采纳率84.2%

vacuum compressed指的是经过真空处理/压缩（装载真空袋里）物品
vacuum bag才是真空袋

1年前查看全部

zlsfo is compressed x28821851年前1: 江西美妹共回答了27个问题 | 采纳率92.6%

第一个单词应该打错了,没有那个单词.最后一个单词的意思是精简,浓缩,压缩.

1年前查看全部