Ellipse

ELLIPSOID, a quadric surface whose sections are ellipses. Analytically, it has for its equation x /a /b /c 2 =1, a, b, c being its axes; the name is also given to the solid contained by this surface (see Geometry: Analytical). The solids and surfaces of revolution of the ellipse are sometimes termed ellipsoids, but it is advisable to use the name spheroid.

 

The ellipsoid appears in the mathematical investigation of physical properties of media in which the particular property varies in three directions within the media; such properties are the elasticity, giving rise to the strain ellipsoid, thermal expansion, ellipsoid of expansion, thermal conduction, refractive index (see CRYSTALLOGRAPHY), &c. In mechanics, the ellipsoid of gyration or inertia is such that the perpendicular from the centre to a tangent plane is equal to the radius of gyration of the given body about the perpendicular as axis; the "momental ellipsoid," also termed the "inverse ellipsoid of inertia" or Poinsot's ellipsoid, has the perpendicular inversely proportional to the radius of gyration; the "equimomental ellipsoid" is such that its moments of inertia about all axes are the same as those of a given body.

My First Crush

Love is the feeling which animates a person who is genuinely fond of someone; the affection and tenderness felt by lovers. It was begun when I was in grade four. I and my childhood friend were always together. After a month, I felt that I have a crush on her.
Everyday after dismissal we were playing different games; we’re playing for an hour to finish. Every night we’re always talking different things and sharing our secrets. I like her because she is so kind and a good companion. After two years that were together her mother went to Hong Kong and they transfer to other house. I didn’t see her for a year. Then when I was in first year high school I’ve see her in Aplaya near our house. Because of my studies I didn’t visit her anymore. That’s the moment that we’re apart.

Conservation of Our Natural Resources

    Today our natural resources are already endanger, so what should we do to conserve our natural resources? What should the government to protect our natural resources? How shall we protect our natural resources? Our natural resources are depending on us. We're the one who must conserve and protect it.

    As a student we have many ways to conserve and protect our natural resources. First of all, cleaning our surroundings, this helps a lot to conserve our natural resources. Then let's plant trees to make our natural resources clean and green. The government must different seminars on how to protect our natural resources. These seminars will inform the people to protect the environment. This different method will protect and save our environment.

    Let's protect our environment today so that on the next generation it will not be destroy and polluted. Let's protect ourselves and save the environment.