Why Is It Harder to Walk Uphill than Downhill?
Why Is It Harder to Walk Uphill than Downhill? It is harder to walk uphill than downhill because you must lift the weight of your body and to do this requires greater...
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When Will Halley’s Comet next Appear?
When Will Halley’s Comet next Appear? Halley’s Comet appeared in 1910, then in 1986 and will next appear in mid-2061, during that most recent visit, five...
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Why Don’t Cranes Topple Over?
Why Don’t Cranes Topple Over? A crane is a type of machine, generally equipped with a hoist rope, wire ropes or chains, and sheaves, that can be used both to lift and...
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What Is a Parachute and How Does It Work?
What Is a Parachute and How Does It Work? A parachute is a device used to slow down an object that is falling towards the ground. There are two forces acting on the...
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Are Days and Nights Getting Longer?
Are Days and Nights Getting Longer? The summer solstice that falls this year on June 21 marks the longest day of the year in the Northern Hemisphere, sunlight-wise....
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