Olympic Vật lý quốc tế 2010 - Lời giải(1) môn vật lý.PDF

... 41st International Physics Olympiad, Croatia – Theoretical competition, July 19th, 2010  ( h)  2/4 (5) B , A from which we have h B2 1 A g  Air  Smoke (6) 1 We can treat the ... acquires velocity 41st International Physics Olympiad, Croatia – Theoretical competition, July 19th, 2010 3/4 Solution of Task a) The kinetic energy of the hot air released in a time interval t is ... Hot...

Ngày tải lên: 27/07/2015, 17:29

... one gets: A=100 … Ekin= -3 3.95 MeV, A=150 … Ekin= -3 0.93 MeV, (17) 41st international Physics Olympiad, Croatia – Theoretical Competition, July 19th 2010 4/8 A=200 … Ekin= -1 4.10 MeV, A=250 … Ekin= ... non-relativistic or relativistic kinematics Non-relativistic solution First one has to find the amount of mass transferred to energy in the reaction (or the energy equivalent, so-...

Ngày tải lên: 27/07/2015, 17:29

... – Theoretical competition, July 19th, 2010 2/4 result in terms of B, A, TAir, g=9.81m/s2, ΔT=TSmoke-TAir Important: in all subsequent tasks assume that this minimal height is the height of the ... (see Fig 2) As the heated air rises through the chimney (thin solid arrows), new cold air enters the collector from its surrounding (thick dotted arrows) enabling a continuous flow of air through...

Ngày tải lên: 27/07/2015, 17:28

... Theoretical Competition, July 19th 2010 2/3 b) For a very large distance r  d , find the expression for the electric field by using the approximation (1+a )-2 ≈ 1-2 a, where a  (0.6 points) c) ... points) Hint: There are several ways of solving this problem: (1) In one of them, you can use the following integral,   x d xdx R  2 = 1 2 d  R2 (2) In another one, you can use t...

Ngày tải lên: 27/07/2015, 17:28

... example of the so-called “transfer reactions”, in which a part of one nucleus (“cluster”) is transferred to the other (see Fig 3) In our example the transferred part is a 4He-cluster (  -particle) ... 1.6605∙1 0-2 7 kg b) The 58Ni nucleus produced in the excited state discussed in the part a), deexcites into its ground state by emitting a gamma-photon in the direction of its motion Conside...

Ngày tải lên: 27/07/2015, 17:29

... Olympiad, Croatia – Theoretical Competition, July 19th 2010 3/8 (11) Task 2b) For very large distances r we can apply approximate formula (1+a )-2 ≈ 1-2 a to the expression (11) what leads us to (12) ... Olympiad, Croatia – Theoretical Competition, July 19th 2010 Eel ,1  8/8 qq' q2R  4 (d  d ' ) 4 d  R (30) This solves Task 4a) From this we immediately have that the electrost...

Ngày tải lên: 27/07/2015, 17:29

... Transparency foils (all foils are 21 cm x 29.7 cm, the blue foil is 200 µm thick, and the colorless foil is 150 µm thick); please, ask for the extra foils if you need them Adhesive (scotch) tape ... the isotropic material, and the thickness d of the transparent foil according to 41st International Physics Olympiad, Croatia – Experimental Competition, July 21st, 2010  Yd , 12(1   ) 4/4 (...

Ngày tải lên: 27/07/2015, 17:29

... Competition, July 21st, 2010 2/4 Figure The rod- and the ring-magnet are aligned The force between them changes as the rodmagnet moves along the z - axis To ensure motion of the rod-magnet along the ... symmetry ( z - axis), the ring-magnet is firmly embedded in a transparent cylinder, which has a narrow hole drilled along the z - axis The rodmagnet is thus constrained to move a...

Ngày tải lên: 27/07/2015, 17:29

... The Maribo Meteorite (a) (b) Frame Time Azimuth Altitude 15 5 1. 46 s 215  19 .2 16 1 2.28 s 2 21 14 .7 Landing at M 230 0.0 (c) Figure 1. 1 (a) Azimuth is the clockwise angular position from north ... Page of T1 The Maribo Meteorite T1 After falling a time in the atmosphere, an outer shell of Maribo of thickness will have been heated to a temperature significantly larger than This...

Ngày tải lên: 27/07/2015, 17:23

... addition to the ice sheet geometry of Fig 3. 1(b) and (c) make the following model assumptions: 1) 2) 3) 4) 5) Ice flows in the -plane away from the ice divide (the -axis) The accumulation rate (m/year) ... glacier by melting near the coasts at The horizontal ( -) component of the ice-flow velocity is independent of The vertical -) component of the ice-flow velocity is independent of...

Ngày tải lên: 27/07/2015, 17:23

... Fm-1 Error analysis is not required Part Resolution of digital calipers [1.0 point] As the relative position of the parallel plates is varied, the capacitance changes with a pattern This set-up ... values Code 33J 68 82J 151 Capacitance value (pF) 34 68 84 150 Experimental Competition: 14 July 2011 Problem Page of Part Calibration Perform the measurement of f using the given capacitors of ....

Ngày tải lên: 27/07/2015, 17:34

... 19 Đồ Án Cơng Nghệ PHẦN II : CƠNG TÁC THỐNG KÊ VÀ QUI TRÌNH XỬ LÝ BÁN THÀNH PHẨM TẠI PHÂN XƯỞNG CẮT, XÍ NGHIỆP MAY 4, CƠNG TY CP MAY THẮNG LỢI I Giới thiệu cấu nhân phân xưởng cắt xí nghiệp may ... thành phẩm phân xưởng cắt đến hiệu q trình sản xuất may cơng nghiệp PHẦN II : CƠNG TÁC THỐNG KÊ VÀ QUI TRÌNH XỬ LÝ BÁN THÀNH PHẨM TẠI PHÂN XƯỞNG CẮT,...

Ngày tải lên: 10/07/2015, 21:54

... gi thit th tớch bỡnh c tng gp ụi, ú s lm gim ỏp sut riờng phn ca cỏc cht (loóng khớ), cõn bng (1) s chuyn dch theo chiu nghch - -8- HNG DN CHM THI CHN I TUYN QUC GIA THI OLYMPIC ... xỏc nh bng h thc: (t l thi gian phn ng; a l nng u; a k = ln (1) x l nng cht ó phn ng) t a-x a) S phõn hy axeton din theo phn ng: CH3COCH3 C2H4 + H2 + CO (2) Theo thi gian phn ng, ỏp sut chung ... Tớnh...

Ngày tải lên: 04/08/2015, 10:58

... có có thẩm quyền, có chuyên môn, nghiệp vụ để kiểm tra, xác định chất lượng hàng hóa họ có quyền chứng nhận chất lượng hàng hóa để đảm bảo khách quan cho người nhập Câu55: Bộ ctừ tóan quốc tế ... đầy đủ ko rõ ràng fải có trách nhiệm liên hệ với NH FH, NH FH ko có trả lời NHTB thông báo cho người hưởng lợi biết thông tin mà ko fải chịu trách nhiệm Còn NH FH có trả lời thôn...

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