L\u1eddi gi\u1ea3i:<\/strong><\/p>\n\n\n\nCh\u1ecdn D.<\/p>\n\n\n\n
+ Khi ch\u1ea5t l\u1ecfng ti\u1ebfp x\u00fac v\u1edbi ch\u1ea5t r\u1eafn th\u00ec t\u00f9y theo b\u1ea3n ch\u1ea5t c\u1ee7a ch\u1ea5t \nl\u1ecfng v\u00e0 ch\u1ea5t r\u1eafn m\u00e0 c\u00f3 th\u1ec3 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng d\u00ednh \u01b0\u1edbt ho\u1eb7c kh\u00f4ng d\u00ednh \n\u01b0\u1edbt.\n<\/p>\n\n\n\n
– Khi l\u1ef1c h\u00fat gi\u1eefa c\u00e1c ph\u00e2n t\u1eed v\u1eadt r\u1eafn v\u00e0 c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t \nl\u1ecfng m\u1ea1nh h\u01a1n l\u1ef1c h\u00fat gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng v\u1edbi nhau, th\u00ec c\u00f3 hi\u1ec7n \nt\u01b0\u1ee3ng d\u00ednh \u01b0\u1edbt.\n<\/p>\n\n\n\n
– Khi l\u1ef1c h\u00fat gi\u1eefa c\u00e1c ph\u00e2n t\u1eed v\u1eadt r\u1eafn v\u00e0 c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t \nl\u1ecfng y\u1ebfu h\u01a1n l\u1ef1c h\u00fat gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng v\u1edbi nhau, th\u00ec c\u00f3 hi\u1ec7n \nt\u01b0\u1ee3ng kh\u00f4ng d\u00ednh \u01b0\u1edbt.\n<\/p>\n\n\n\n
+ S\u00e1t m\u00e9p ch\u1ea5t l\u1ecfng v\u1edbi th\u00e0nh b\u00ecnh, m\u1eb7t tho\u00e1ng ch\u1ea5t l\u1ecfng h\u01a1i b\u1ecb cong g\u1ecdi l\u00e0 m\u1eb7t khum. \n<\/p>\n\n\n\n
+ N\u1ebfu ch\u1ea5t l\u1ecfng l\u00e0m d\u00ednh \u01b0\u1edbt th\u00e0nh b\u00ecnh th\u00ec m\u1eb7t khum \u0111\u00f3 l\u00e0 m\u1eb7t l\u00f5m, c\u00f2n n\u1ebfu ch\u1ea5t l\u1ecfng kh\u00f4ng l\u00e0m d\u00ednh \u01b0\u1edbt th\u00e0nh b\u00ecnh th\u00ec m\u1eb7t khum l\u00e0 l\u1ed3i. <\/p>\n\n\n\n
B\u00e0i 9 (trang 203 SGK V\u1eadt L\u00fd 10) :<\/strong> T\u1ea1i sao n\u01b0\u1edbc m\u01b0a kh\u00f4ng l\u1ecdt qua \u0111\u01b0\u1ee3c c\u00e1c l\u1ed7 nh\u1ecf tr\u00ean t\u1ea5m v\u1ea3i b\u1ea1t?<\/p>\n\n\n\nA. V\u00ec t\u1ea5m v\u1ea3i b\u1ea1t b\u1ecb d\u00ednh \u01b0\u1edbt n\u01b0\u1edbc<\/ins><\/p>\n\n\n\nB. V\u00ec v\u1ea3i b\u1ea1t kh\u00f4ng b\u1ecb d\u00ednh \u01b0\u1edbt n\u01b0\u1edbc<\/p>\n\n\n\n
C. V\u00ec l\u1ef1c c\u0103ng b\u1ec1 m\u1eb7t c\u1ee7a n\u01b0\u1edbc ng\u0103n c\u1ea3n kh\u00f4ng cho n\u01b0\u1edbc l\u1ecdt qua c\u00e1c l\u1ed7 nh\u1ecf c\u1ee7a t\u1ea5m b\u1ea1t.<\/p>\n\n\n\n
D. V\u00ec hi\u1ec7n t\u01b0\u1ee3ng mao d\u1eabn ng\u0103n c\u1ea3n kh\u00f4ng cho n\u01b0\u1edbc l\u1ecdt qua c\u00e1c l\u1ed7 tr\u00ean t\u1ea5m b\u1ea1t.<\/p>\n\n\n\n
L\u1eddi gi\u1ea3i:<\/strong><\/p>\n\n\n\nCh\u1ecdn C.<\/p>\n\n\n\n
B\u00e0i 10 (trang 203 SGK V\u1eadt L\u00fd 10) :<\/strong> T\u1ea1i sao gi\u1ecdt d\u1ea7u l\u1ea1i c\u00f3 d\u1ea1ng kh\u1ed1i c\u1ea7u n\u1eb1m l\u01a1 l\u1eedng trong dung d\u1ecbch r\u01b0\u1ee3u c\u00f3 c\u00f9ng kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u1edbi n\u00f3?<\/p>\n\n\n\nA. V\u00ec h\u1ee3p l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean gi\u1ecdt d\u1ea7u b\u1eb1ng kh\u00f4ng, n\u00ean do hi\u1ec7n t\u01b0\u1ee3ng \nc\u0103ng b\u1ec1 m\u1eb7t , l\u00e0m cho di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a gi\u1ecdt d\u1ea7u co l\u1ea1i \u0111\u1ebfn gi\u00e1 tr\u1ecb \nnh\u1ecf nh\u1ea5t \u1ee9ng v\u1edbi di\u1ec7n t\u00edch m\u1eb7t c\u1ea7u v\u00e0 n\u1eb1m l\u01a1 l\u1eedng trong dung d\u1ecbch r\u01b0\u1ee3u.<\/ins><\/p>\n\n\n\nB. V\u00ec gi\u1ecdt d\u1ea7u kh\u00f4ng ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c n\u00e0o c\u1ea3, n\u00ean do hi\u1ec7n t\u01b0\u1ee3ng \nc\u0103ng b\u1ec1 m\u1eb7t, di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t gi\u1ecdt d\u1ea7u co l\u1ea1i \u0111\u1ebfn gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t \u1ee9ng \nv\u1edbi di\u1ec7n t\u00edch c\u1ee7a m\u1eb7t h\u00ecnh c\u1ea7u v\u00e0 n\u1eb1m l\u01a1 l\u1eedng trong dung d\u1ecbch r\u01b0\u1ee3u.<\/p>\n\n\n\n
C. V\u00ec gi\u1ecdt d\u1ea7u kh\u00f4ng b\u1ecb dung d\u1ecbch r\u01b0\u1ee3u d\u00ednh \u01b0\u1edbt, n\u00ean n\u00f3 n\u1eb1m l\u01a1 l\u1eedng trong dung d\u1ecbch.<\/p>\n\n\n\n
D. V\u00ec l\u1ef1c c\u0103ng b\u1ec1 m\u1eb7t c\u1ee7a d\u1ea7u l\u1edbn h\u01a1n l\u1ef1c c\u0103ng b\u1ec1 m\u1eb7t c\u1ee7a dung d\u1ecbch r\u01b0\u1ee3u, n\u00ean \u00f3n n\u1eb1m l\u01a1 l\u1eedng trong dung d\u1ecbch r\u01b0\u1ee3u.<\/p>\n\n\n\n
L\u1eddi gi\u1ea3i:<\/strong><\/p>\n\n\n\nCh\u1ecdn A. Hai kh\u1ed1i c\u00f9ng th\u1ec3 t\u00edch, kh\u1ed1i d\u1ea1ng h\u00ecnh c\u1ea7u c\u00f3 di\u1ec7n t\u00edch m\u1eb7t ngo\u00e0i l\u00e0 nh\u1ecf nh\u1ea5t. V\u00ec v\u1eady khi h\u1ee3p l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean ch\u1ea5t l\u1ecfng b\u1eb1ng kh\u00f4ng th\u00ec l\u1ef1c c\u0103ng b\u1ec1 m\u1eb7t l\u00e0m cho kh\u1ed1i ch\u1ea5t c\u00f3 d\u1ea1ng h\u00ecnh c\u1ea7u \u0111\u1ec3 gi\u1ea3m t\u1ed1i \u0111a di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t tho\u00e1ng.<\/p>\n\n\n\n
B\u00e0i 11 (trang 203 SGK V\u1eadt L\u00fd 10) :<\/strong> M\u1ed9t \nv\u00f2ng xuy\u1ebfn c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i l\u00e0 44 mm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong l\u00e0 40 mm. \nTr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u00f2ng xuy\u1ebfn l\u00e0 45 mN. L\u1ef1c b\u1ee9t v\u00f2ng xuy\u1ebfn n\u00e0y ra kh\u1ecfi b\u1ec1 \nm\u1eb7t c\u1ee7a glixerin \u1edf 20o<\/sup>C l\u00e0 64,3 mN. T\u00ednh h\u1ec7 s\u1ed1 c\u0103ng b\u1ec1 m\u1eb7t c\u1ee7a glixerin \u1edf nhi\u1ec7t \u0111\u1ed9 n\u00e0y.<\/p>\n\n\n\nL\u1eddi gi\u1ea3i:<\/strong><\/ins><\/p>\n\n\n\n