By Zheng Yongling

This publication compiles the entire try difficulties and ideas from the first throughout the eighth Asian Physics Olympiad. try questions of each paper include components, a thought part and an scan part, sooner than which mins of groups and result of every one pageant are brought. it's a particularly fascinating reference booklet for either scholars and academics of overseas festival education in addition to center tuition scholar contestants.

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Additional resources for Asian Physics Olympiad: 1st-8th, Problems and Solutions

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Its z-axis coincides with the axis of rotation of the Earth. Its x-axis is along the line connecting the centers of the Moon and the Earth, and points in the direction of the unit vector r as shown in Fig. 2 - 1. 29 The Second Asian Physics Olympiad The Moon remains always on the negative x-axis in this frame. Note that distances in Fig. 2 - 1 are not drawn to scale. The curved arrows show the directions of the Earth's rotation and the Moon's revolution. The Earth-Moon distance is denoted by r.

G) The radius of the Earth is RE = 6. 37 X 10 6 m. 672 59 X 10-11 N. m 2 /k~. The following assumptions may be made when answering questions: (i) The Earth-Moon system is isolated from the rest of the universe. (ii) The orbit of the Moon about the Earth is circular. (iii) The axis of rotation of the Earth is perpendicular to the orbital plane of the Moon. (iv) If the Moon is absent and the Earth does not rotate, then the mass distribution of the Earth is spherically symmetric and the radius of the Earth is R E • 30 Asian Physics Olympiad Problems and Solutions (v) For the Earth or the Moon, the moment of inertia I about any axis passing through its center is that of a uniform sphere of mass M and radius .

2-4. (1) The crystal is cut in such a way that the plane containing ABCD becomes a boundary surface and is chosen for doing low-energy electron diffraction experiments. A collimated beam of electrons with kinetic energy of 64. 0°. Note that ¢o is the angle between the incident electron beam and the normal of the surface plane. The plane containing AC and the normal of the surface plane is the plane of incidence. For simplicity, we assume that all incident electrons are back scattered only by the surface atoms on the topmost layer.

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