Did you Know: Galileo discovered the sun spots
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  • Centrifugal force

    Posted on September 25th, 2014 rudrarup No comments

    When something is going straight, it always keeps going straight unless something else stops it or turns it. If it can’t go straight, then it goes as straight as it can. So when you hit a ball tied to a rope, it tries to go straight away from you. But the rope pulls on it and keeps the ball from going straight. So the ball goes as straight as it can – around the pole in a circle. That’s centrifugal force – the energy of something trying to go straight even though it can’t.

    The Earth is affected by centrifugal force. It is moving, so it tries to keep moving in a straight line. But the gravity of the Sun pulls the Earth toward it, just as the rope pulls the ball. Gravity can’t pull the Earth into the Sun, because the Earth keeps trying to go straight. So the Earth takes a middle road, going in a circle around the Sun.

    Following is a video about centrifugal force.

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  • Simple Microscope

    Posted on September 23rd, 2014 rudrarup No comments

    micro organismThe invention of the microscope is not credited to any one person. Strong lenses were used since antiquity to examine tiny objects. Microscopes were byproducts of research on telescopes by men such as Galileo and Kepler.

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  • Universe in a nutshell

    Posted on February 14th, 2012 rudrarup No comments

    The universe is the largest known thing in existence. But what is the smallest thing? Learn about everything in existence between the two. This is a flash file that can be downloaded if required. It will also be available here.

    Link

  • Pinhole Camera

    Posted on February 7th, 2012 rudrarup No comments

    How does a camera change a big scene into a small picture? To see for yourself, make a pinhole “camera.” Start with an empty cardboard box. Punch a hole in the center of the bottom by pushing a pencil through it.

    Now place a piece of waxed paper over the open end of the box and hold it there with tape or a rubber band. Your pinhole camera is complete.

    Sit in a dim room that has a bright object in it, such as a lamp or a window that lets in daylight. Lay a blanket over your head and the pinhole camera.

    Hold the camera at arm’s length, with the waxed paper toward you and the punched-out hole sticking out from under the blanket. Point the camera at the bright object. On the surface of the waxed paper, you will see a picture of the object—backward and upside down. Read the rest of this entry »

  • Free Graph Papar

    Posted on February 6th, 2012 rudrarup No comments

    Here is a graph paper that you can use to create your own graphs. This is made as a standard grapg paper with 8×10 inch paper. Download the PDF and print your own copies.