Qui chế Olympic vật lí quốc tế
Đề IPHO(vật lí quốc tế) 1967
... fact that the network is infinite). Fig. 4 Thus, we may use the equivalence shown graphically in Fig. 5. Fig. 5 Algebraically this equivalence can be written as AB AB Rr rR 11 1 + += . Thus A rrr ... (Australia) as from that time the organizers started putting the problems on their home pages. The Olympic home page www.jyu.fi/ipho contains the problems starting from the XXVIII IPhO in Sudbu...
Ngày tải lên: 19/09/2013, 10:10
Đề IPHO(vật lí quốc tế) 1970
... is placed on a smooth horizontal surface of a table where it can move frictionless. A carriage equipped with a motor can slide along the upper horizontal panel of the bar, the mass of the carriage ... of this sphere, electrical capacity of the obtained system of conducting bodies and draw out an equivalent electric scheme. Fig. 3 Fig. 4 Problem 4. A spherical mirror is installed into a telesc...
Ngày tải lên: 19/09/2013, 13:10
Đề IPHO(vật lí quốc tế) 1971-1
... quantities given and the acceleration g due to gravity. • At what ratio m 1 /m 2 the prism will be in equilibrium? Fig. 1 Question 2. A vertical glass tube of cross section S = 1.0 cm 2 contains unknown ... mercury level in the pan. α 1 α 2 m 1 m 2 Provided that the system is in mechanical and thermal equilibrium during all the processes calculate the mass m of the hydrogen, the intermediate...
Ngày tải lên: 19/09/2013, 13:10
Đề IPHO(vật lí quốc tế) 1971-2
... (1.12), and (1.14) all forces internal to the system cancel each other. In this way we obtain the required relation between accelerations a and a 0 : (1.16) 2211 21 0 coscos α+α ++ = mm mmM aa . The ... )coscos)(sinsin( α+α−+++ α+αα−α = mmmmMmm mmmm a . It follows from equation (1.17) that the prism will be in equilibrium (a 0 = 0) if: (1.18) 1 2 2 1 sin sin α α = m m . Question 2. We will de...
Ngày tải lên: 19/09/2013, 13:10
Đề IPHO(vật lí quốc tế) 1972
... closed with two negligible mass lids and filled with a liquid with the same density like the cylinder’s walls. The friction between the liquid and the cylinder wall is considered negligible. The ... accelerations. d) The interaction force between the liquid and the walls of the cylinder in the case of sliding of this cylinder, knowing that the liquid mass is m l . Solution Problem 1 1 E-mail:...
Ngày tải lên: 19/09/2013, 18:10
