HlJdNG DAN QUAN LY, SlT DUNG CHf TAO BO T H I N G H I E M NGHIEN Clhl BjNH LUAT BOI MABIOT VA KINH TIEM VONG SOf BUNG TBONG CAC GI0 NGOAI KHOA • • • • ThS Tran Ba Trinh Pham Thj Phtfdng Thao^ Nguyen T[.]
HlJdNG DAN QUAN LY, SlT DUNG CHf TAO BO T H I N G H I E M NGHIEN Clhl BjNH LUAT BOI - MABIOT VA KINH TIEM VONG SOf BUNG TBONG CAC GI0 NGOAI KHOA • • • • ThS Tran Ba Trinh Pham Thj Phtfdng Thao^ Nguyen Thj Quynh Trudng Dai hoc SUpham Ha Ngi E eu tif che tao du'dc cac dung cu thi nghiem (TN) de nghien cifu cac hien tifdng, quy luat vat h thi hpc sinh khdng nhtfng hieu rd kie'n thiic hdn ma cdn bie't van dung kien thiic thifc te va hiing thu hdn hpc tap Vi phai trai qua nhieu giai doan, ddi hdi lam viec tich cifc, tl mi va sang tao nen viec che^ tao cac dung cu TN can du'dc tien hanh cac gid ngoai khda Bai bao trinh bay mdt sd' npi dung hu'dng dan che tao TN de sii dung cac gid ngoai khda Che tao bo thi nghiem nghien ciiu dinh luat BoiMario't a) Nguyen vat lieu (Hinh 1): - 05 qua nang 1kg (1); - 01 bdm tiem 60 ml (2); - 01 vd hop sat (3); - 200g xi-mang (4), 100 ml nu'dc; - 01 niit cao su hinh chdp cut (5); - 01 mie'ng gd hinh tru, day cm (6); - 01 cudn bang dinh, 01 keo, 01 dao b) Che tao: - Dting dao cat dau bdm tiem (2), dung niit cao su (5) mit chat lai.- Dting dao cat bd phan de' trdn ciia pit-tdng va xe ranh hinh chtf "thap" tren mat mie'ng gd (6) cho mie'ng gd cd the dat "ngap" mpt phan len phan dudi pit-tdng (Hinh 2).- Trpn xi-mang vao nifdc khdng long hoac dac qua Do ximang da trdn vao hop sat, dat dau xi-lanh cd mit cao su vao chinh giiia day hop Chti y: Dat xi-lanh thang diing; be mat niit cao su xi-lanh phai ngang vdi mat xi-mang; dpi xi-mang khd; dung cdn hoac xang lau cac chif in tren xi-lanh, chi giif lai phan vach chia de the tich - Nung dd kim tiem bang den cdn, rdi due Id nhd tren xi-lanh tai vi tri each mat ximang khoang 2,5 cm Hinh Che tao bo TN nghien cAi dinh luat Boi-Mariot ITinh Nguyen vat lieu che tao bo TN nghien cihi dinh luat B6i-Mari6't 16 c) Bd tri va tien hanh thi nghiem (Hinh 3)- Dieu chinh Sd 64 thang 12 nam 2010 xi-lanh den vi tri bat ki Vo, dd ap sua't xilanh la po, rdi bit Id nhd bang bang dinh.- Dat tifng qua can len mie'ng gd tren dau pittdng, ling vdi mdi lan dat, ta ghi lai the tich xilanh bang each dpc vach tren xi-lanh va ghi lai sd'qua can Hinh Tien h^nh TN nghien cuM dinh luat B6i-Mari6't d) Ke't qua va xii li ket qua Ap suat khi dat n qua can du'dc tinh theo cdng thtic: p„ = p(i + n.m.g/S dd n = {0,l, ,5},po=10'Pa, m = kg, S = 1/1500 ml Nhif vay, ta cd bang sdUeu: (Bang 1) e) Nhan xet - TN minh hpa du'dc dinh luat Bdi-Marid't vdi sai sd nhd - TN cd the du'dc tien hanh vdi nhieu lifdng xac dinh khac Vdi gia tri VI khoang 40 - 50 ml, ^sartpsr^r^ir Hl/dNG DAN QUAN LY, sC^ DUNG n V„ {ml) 40 36 31 27 24 21 V„ (m') 40.10"'' 36.10"*^ 31.10"'^ 27.10"'' 24.10"'' 21.10"'' Pu (Pa) 100.000 115.000 130.000 145.000 160.000 175.000 Kei qua /9„V„ (Pa.m') 4,000 4,140 4,030 3,915 3,840 3,675 ^=3,3933, ApV= 0,123 Sai SP tu'dng dpi: 3,13% Bdng difdc nhieu so' lieu hdn, thu du'dc ke't qua TN td't hdn - TN gidi thieu mpt each xac dinh ap sua't chat ma khdng can dung ap ke Dung eu thi nghiem ddn gian, de tim, de che tao Che'tao kfnh tiem vong a) Nguyen vat lieu (Hinh 4)- 01 d'ng nu'dc 027 dai 50cm (1)- 02 nd'i dng nu'dc vuong (2).- 02 manh gifdng phang (3).- Gia'y bia ciing (4), keo, keo 502 tTinh Nguyen vat lieu che tao kinh tiem vong b) Che' tao - Cat gia'y bia hinh elip (4) cho dat du'dc vao nd'i dng nu'dc (2) va hpp vdi phifdng thang diing gdc 45" (can cii vet nd'i cheo ciia dau nd'i (2) de so gdc) - Diing mie'ng bia (4) cat dupe lam mau, cat mie'ng Du'dng truyen lia sang kinh tiem vpng z: ¥ \/ H l n h Kinh tiem v g n g kinh (3) cd hinh dang gid'ng bet (nhd gia cdng kinh hoac tif cat bang dung dieh HF) - Lap manh gifdng (3) vao ndi d'ng nifdc (2) Ne'u gifdng cat khdng khit thi dung keo 502 gan gifdng vao d'ng nifdc- Nd'i dau nd'i dng nu'dc vudng (2) da lap gifdng bang doan d'ng thang (1) (Hinh 5) c) Sii dung Dat mat vao dau difdi ciia kinh tiem vpng, xoay d'ng nu'dc de thay ddi phifdng nhin d) Nhan xet: Kinh tiem vpng ed the coi la mpt iing dung ki thuat ciia vat li, du'dc dung de quan sat cac hlnh anh ma ta khdng cd dieu kien quan sat trifc tie'p (khi d tau ngam, ham sau, xe tang ) - Thuan ldi ehe tao: Dung cu ddn gian, de tim va nguyen li de hieu.Khd khan ehe tao: Cat gifdng ehp." Phan men day hoc tieng Viet "^^^^' ^^^^^ '^ giang ciia minh Co the ndi HOC, DAY TIENG VIET 1, phan Luyen tap tdng hdp la mpt nhiing phan mem giao due vdi npi dung sd dd so nha't cua Viet Nam tinh tdi thdi diem hien tai va la bd phan mem dau tien md phdng chinh xac theo tuhg npi dung kie'n thiic cua sach giao khoa Tieng Viet Phan mem dinh hifdng cho ngifdi dung la hpc sinh tru'dng Tieu hpc sii dung nhif mpt cdng cu hd trd hpc Tieng Viet difdi sif hifdng dan ciia cha me hoac thay cd giao, d tnfdng Cling nhif d gia dinh Phan mem dinh hu'dng cho ngu'di diing la giao vien tru'dng Tieu hpc sii dung nhuf mpt cdng cu ho trd giang day mdn Tieng Viet tren ldp hpc Phan mem ciing cd the danh cho cha me hpc sinh sii dung de hifdng dan em minh hpc va dn luyen hpc Tie'ng Viet d nha Phan mem ciing cd the danh cho ngifdi nifdc ngoai hoac Viet kieu mudn tif hpc va hlfdng dan em minh hpc tieng Viet mpt each bai ban.B Sd 64 thang 12 nam 2010 17