一花样滑冰运动员,开始自转时其动能为 http://edu-image.nosdn.127.net/_PhotoUploadUtils_ec958271-d8aa-4618-b3cd-fe39d12b51aa.png, 然后他将手臂收回,转动惯量减少为原来的 http://edu-image.nosdn.127.net/_PhotoUploadUtils_cdb564af-7712-4e3c-bb42-e2dce995113a.png ,即 http://edu-image.nosdn.127.net/_PhotoUploadUtils_abad0db3-885c-46e8-9f16-2559a6c04e77.png 则此时他的角速度和动能分别为
举一反三
- 一花样滑冰者,开始时两臂伸开,转动惯量为,自转时,其动能为,然后他将手臂收回,转动惯量减少至原来的,此时他的角速度变为,动能变为E,则有关系/ananas/latex/p/102846/ananas/latex/p/428428/ananas/latex/p/2707/ananas/latex/p/309
- 用A表示(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f|A|B|C|D|E|F),用B表示(0|1|2|3|4|5|6|7|8|9|A|B|C|D|E|F),则描述c语言十六进制整数的正规式是:( )。 A: (-|ε)(0x|0X)BB* B: (-|ε)AA* C: (-|ε)(0x|0X)AA* D: (0x|0X)BB*
- 常用的国际域名()? A: COM,.ORG B: ORG,.NET C: NET,.EDU D: EDU,.INT
- <img src="http://edu-image.nosdn.127.net/908C8AB8B26A762ABC524C66A7EF21E6.jpg?imageView&thumbnail=520x520&quality=100" />? 8|16|3|256
- 设[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_067016aa-77f2-4aff-bd36-e3fa5f1bd893.png"],[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_358ab06c-7f19-4ae6-ba82-424c72bd4d18.png"],则[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_2b561af0-b65d-4e5e-936b-72b15b4f0f56.png"][img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_92284d1b-6fe3-4dc1-a732-618796cd01a4.png"] A: 6 B: 10 C: 8 D: 4