Why Is Our Galaxy Shaped like a Spiral?
A galaxy is a huge number of stars grouped together. Our galaxy contains about 1,00,000 million stars. It looks like a disc with a flat center and spiral arms. From the...
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What’s the Difference Between Disc and Drum Brakes?
What’s the Difference Between Disc and Drum Brakes? A car in motion has a lot of kinetic energy, which is energy of motion. To stop a car, the brakes have to get...
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