... M = - k.Md.g / M a1 = - 0,14 m/s2 + d ng v n t c c a tàu b ng không S1= - v12/2.a1 = 110 ,23 m + Góc l ch : tan α = ma1 /mg = 0,14 → α = 7,97 dây treo l ch v phía trư c + L c căng dây: cos α = ... ma sát tác d ng lên bánh u tàu Fp = fms = k.Md g /2 = 14 .103 N Gia t c c c i mà tàu t c: amax = Fp /M = Fp / (Md + Mt) =0,07 m/s2 Th i gian ng n nh t : Vt = v0 + a.tmin → tmin = vt /amax = 79,4 ... Câu (4 i m): Cho m t ng ti t di n S n m ngang c ngăn v i bên b ng pittông Pittông th nh t c n i v i lò xo hình v Ban u lò xo không bi n d ng, áp su t khí gi a pittông b ng áp...
... áp án Toán 10 N I DUNG I M Câu 1: Gi i h phương trình: 8xy 2 x + y + x + y = 16 x + y = x2 − y (1) ... = ⇒ y = (4) vô nghi m x2 + y2 ≥ x + y > V y h có hai nghi m (–3; 7); (2; 2) 0,5 0,5 áp án Toán 10 N I DUNG Câu 2: Cho s th c a , b , x , y th a mãn i u ki n ax − by = Tìm giá tr nh nh t c a ... ; 0; ; − 2 V y 3 3 + a2 + b2 ≥ 2 a2 + b2 = 2 a +b a +b ( c ) ch ng h n áp án Toán 10 N I DUNG Câu 3: Cho tam giác ABC có góc A, B th a i u ki n : I M sin 3A 3B A− B...
... more languages than any other continent Although foreigners have been responsible for the (111 )……….of some INTRODUCE languages, there are hundreds of local languages It is important that (112 )………for ... word ( 10 pts) The human race is only one species of (81)………… in the living world Many other species exist on this planet However, human beings have a great influence on the rest of the 11 world ... offspring The earth will be a happy planet where human beings, animals and plants peacefully co-exist Key: 81 beings 86 badly/ heavily 82 by 87 efforts 83 pollutants 88 national 84 resulted 89 killing...
... below and then answer the questions - (10 points) The World and Its Global Economy The world as man knows it today is getting smaller and smaller because of technology such as the Internet and ... person wants a car so he can show his neighbor how wealthy he is, and all this does is promote unneeded consumption Why does the person who has nowhere to go and no money to spend for travel want ... longer willing to purchase gasoline so they can drive their cars, and they will demand both alternative transportation methods and cars which use another source of energy A current online survey...
... độ cao h tách khỏi vòng tròn Tính độ cao ban đầu H m1 Bỏ qua ma sát Bài 6: Một xi lanh kín hình trụ chiều cao h, tiết diện S = 100 cm2 đặt thẳng đứng Xylanh chia thành hai phần nhờ pittông cách ... lượng m1 , m2 với m2 = 2m1 Pittông cân cách đáy đ an h2 = 3h/5 a.Tính áp suất khí hai phần xylanh? Lấy g = 10 m/s2 b.Ðể pittông cách hai đáy xylanh phải nung nóng phần nào, đến nhiệt độ bao nhiêu? ... (phần lại giữ nhiệt độ không đổi) Ghi : Thí sinh làm câu hay nhiều tờ giấy riêng ghi rõ câu số trang tờ giấy làm ...
... long hair, Indian music, and moss dress For a variety of reasons, the musicians began to drift apart, and their last concert took place in San Francisco in 1966 The newspapers and tabloids publicized ... women have significant advantages on men in space They need less food and less oxygen and they stand up to radiation well Men's advantages in terms of strength and stamina, meanwhile, are virtually ... homes underground c animals are noisy and aggressive d animals are watchful and quiet 15 The word 'them' refers to a mad dogs and Englishmen b desert animals c behavior and physiology d minutes...
... Cho hệ học hình vẽ Lò xo nhẹ độ cứng k = 40N/m mang đĩa A hình Ðĩa A có khối lượng M = 60g Thả vật khối lượng m = 100 g rơi tự từ độ cao h = 10cm so với đĩa Khi m rơi chạm vào đĩa, m gắn chặt ... động điều hòa theo phương thẳng đứng Lấy g = 10 m/s Viết phương trình dao động hệ, chọn gốc tọa độ O vị trí cân hệ, chiều dương hướng xuống, gốc thời gian lúc m dao động, qua vị trí lò xo không...
... know some things Heat a kettle and the (3) inside it expands The (4) of the world has climbed more than half a degree this century, and the oceans have (5) by at least 10 cm But (6) ... pause They can be effective in limited circumstances - in car parks, for instance And with the new generation of speed cameras, we have a chance to reduce pedestrian deaths in urban areas Their ... often (10) and numbers continued to fall Hunting of many species continued until 1986 when the IWC finally responded to international pressure and a ban on commercial whaling was introduced 10...
... below and then answer the questions - (10 points) The World and Its Global Economy The world as man knows it today is getting smaller and smaller because of technology such as the Internet and ... person wants a car so he can show his neighbor how wealthy he is, and all this does is promote unneeded consumption Why does the person who has nowhere to go and no money to spend for travel want ... longer willing to purchase gasoline so they can drive their cars, and they will demand both alternative transportation methods and cars which use another source of energy A current online survey...
... know some things Heat a kettle and the (3) inside it expands The (4) of the world has climbed more than half a degree this century, and the oceans have (5) by at least 10 cm But (6) ... some things Heat a kettle and the (3) water inside it expands The (4) temperature of the world has climbed more than half a degree this century, and the oceans have (5) risen by at least 10 cm ... a pause They can be effective in limited circumstances in car parks, for instance And with the new generation of speed cameras, we have a chance to reduce pedestrian deaths in urban areas Their...
... below and then answer the questions - (10 points) The World and Its Global Economy The world as man knows it today is getting smaller and smaller because of technology such as the Internet and ... person wants a car so he can show his neighbor how wealthy he is, and all this does is promote unneeded consumption Why does the person who has nowhere to go and no money to spend for travel want ... longer willing to purchase gasoline so they can drive their cars, and they will demand both alternative transportation methods and cars which use another source of energy A current online survey...
... more languages than any other continent Although foreigners have been responsible for the (111 )……….of some INTRODUCE languages, there are hundreds of local languages It is important that (112 )………for ... and produce offspring The earth will be a happy planet where human beings, animals and plants peacefully co-exist Key: 81 beings 82 by 83 pollutants 86 badly/ heavily 87 efforts 88 national 84 ... specialties 106 preoccupied 102 provisionally 107 uncompromising 103 disappointingly 108 economical 104 dependency 109 resolution 105 intimacy 110 malpractices 14 PHẦN PHÁCH ...
... couâte le billet d entrée avant les travaux de réparation ? (0,5 pt) Quelle est la cause de la fermeture de la Tour de Pise ? (0,5pt) B CONNAISSANCE DE LA LANGUE : (10pts) Mettez les verbes entre ... b.Les FranVais / consommer moins // Avoir toujours du plaisir / acheter et faire la fête (cependant) C EXPRESSION ECRITE (10 pts) D après vous, est-il nécessaire d apprendre une deuxième langue ... mais un objet volant Il (ne pas faire) _ de bruit de moteur Pendant trente secondes, nous (observer) cet objet Ensuite, deux énormes phares (éclairer) _ très loin dans la nuit Soudain,...
... OH mặt phẳng (ABC) ………………… Hết ………………… Họ tên thí sinh : …………………………………………………………………… … SBD:………… Thanh Chương, ngày 15tháng năm 2008 Giáo viên Trần Đình Hiền ...
... know some things Heat a kettle and the (3) inside it expands The (4) of the world has climbed more than half a degree this century, and the oceans have (5) by at least 10 cm But (6) ... a pause They can be effective in limited circumstances in car parks, for instance And with the new generation of speed cameras, we have a chance to reduce pedestrian deaths in urban areas Their ... often (10) and numbers continued to fall Hunting of many species continued until 1986 when the IWC finally responded to international pressure and a ban on commercial whaling was introduced 10...