Tentang Olimpiade Fisika (Pdf) - Yohanes Surya.com

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(a) If the amplitude of the motion is reduced by 20% during a 50s intervaldetermine a value for m.(b) Given that longitudinal wave velocity,v = Ö(E/ρ), determine also the lowestvalue for w, given that the rods are made of aluminium with a density (r ) of2700 kg.m -3 and a Young modulus (E ) of 7.1 x 10 10 Pa.(c) It is impossible to make the rods exactly the same length so the photocellsignal has a beat frequency of 0.005 Hz. What is the difference in length of therods?(d) For the rod of length l, derive an algebraic expression for the change inlength, Dl, due to a change, Dg, in the gravitational field strength, g, in terms of land other constants of the rod material. The response of the detector to thischange takes place in the direction of one of the rods.(e) The light produced by the laser is monochromatic with a wavelength of656nm. If the minimum fringe shift that can be detected is 10 -4 of the wavelengthof the laser, what is the minimum value of l necessary if such a system were to becapable of detecting variations in g of 10 -19 N kg -1 ?1BThis part is concerned with the effect of a gravitational field on the propagation oflight in space.(a) A photon emitted from the surface of the Sun (mass M, radius R) is redshifted.By assuming a rest-mass equivalent for the photon energy, applyNewtonian gravitational theory to show that the effective (or measured) frequencyof the photon at infinity is reduced (red-shifted) by the factor (1 - GM/Rc 2 ).(b) A reduction of the photon’s frequency is equivalent to an increase in its timeperiod, or, using the photon as a standard clock, a dilation of time. In addition, itmay be shown that a time dilation is always ac<strong>com</strong>panied by a contraction in theunit of length by the same factor.We will now try to study the effect that this has on the propagation of light nearthe Sun. Let us first define an effective refractive index n r at a point r from thecentre of the Sun. Let17
where c is the speed of light as measured by a co-ordinate system far away fromthe Sun’s gravitational influence (r ® ¥), and c r ¢ is the speed of light as measuredby a co-ordinate system at a distance r from the centre of the Sun.Show that n r may be approximated to:for small GM/rc 2 , where a is a constant that you determine.(c) Using this expression for n r , calculate in radians the deflection of a light rayfrom its straight path as it passes the edge of the Sun.Data:Gravitational constant, G = 6.67 ´ 10 -11 N m 2 kg -2 .Mass of Sun, M = 1.99 ´ 10 30 kg.Radius of Sun, R = 6.95 ´ 10 8 m.Velocity of light, c = 3.00 ´ 10 8 m s -1 .You may also need the following integral:18
Page 1 and 2: Tentang Olimpiade FisikaABSTRAKMaka
Page 3 and 4: 1. SEJARAH OLIMPIADE FISIKAIde peny
Page 5 and 6: PESERTA OFI806040200135Jumlah Negar
Page 7 and 8: (dengan aturan baru ini pihak penye
Page 9 and 10: Tabel 2: Negara Penyelenggara OFANe
Page 11 and 12: Tahun 1994, Indonesia ikut serta da
Page 13 and 14: 3 SOAL-SOAL DAN PENILAIAN DALAMOLIM
Page 15 and 16: SOAL OFI XXVIINuclear Masses and St
Page 17: (1) - - decay; emission from the nu
Page 21 and 22: 2. Determine the maximum depth of d
Page 23 and 24: Figure II-1. A model describing the
Page 25 and 26: III. A Heavy Vehicle Moving on An I
Page 27 and 28: Dari perbandingan diatas jelas bahw
Page 29 and 30: Hal lain yang menarik diamati akiba
Page 31 and 32: erkurang. Disini peran media massa
Page 33 and 34: 5. STRATEGI UNTUK TETAP MENJADI JUA
Page 35 and 36: PUSAT FISIKAPusat fisika merupakan
Page 37 and 38: adalah bangsa yang besar yang mempu
Page 39 and 40: APENDIK 1Statutes of the Internatio
Page 41 and 42: The competition tasks are chosen an
Page 43 and 44: §8The long-term work involved in o
Page 45 and 46: a) Foundation of kinematics of a po
Page 47 and 48: a) Conservation of charge, Coulomb'
Page 49 and 50: ) Energy levels of atoms andmolecul

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