Why do rechargeable batteries lose power as they age? Because the process of recharging a battery is not 100% efficient and because of chemical degradation. These days, the majority of us use rechargeable batteries every day. While writing this, I have four devices currently recharging. I am sure you have something similar while you are […]
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What is the oldest still spoken language? This is a question that can never have a satisfactory answer because written records only go back so far, and a lot of languages were not written down until relatively recently. A reworking of this question could be how many speakers of modern languages would be able to
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Why can warm air carry more moisture? Warm air can carry more moisture because more water evaporates when the air is warm and there is more space between the water molecules to hold that moisture. Saying that warm air “holds” more water is a little bit inaccurate because the air doesn’t actually hold the water.
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What is snuff? Snuff is a form of powdered tobacco that you can inhale, giving you a quick nicotine hit. Snuff has been around for a long time. Native people living in the area that is now Brazil used powdered tobacco leaves as snuff. They ground the leaves using a rosewood pestle and mortar, which
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Why does America use the Electoral College system? America uses the Electoral College because the early American government didn’t trust the voting people to be able to vote for the correct candidate instead of the one whose name they just happen to recognize. How does the Electoral College system work? The Electoral College has 538
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How does the color of a bird’s wings help it fly? Many birds that soar and glide have wings that are darker on the top than on the bottom because radiated heat helps them to fly. Birds usually have wings that are a different color on the top to that on the bottom. The general
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How does the magnetic strip on a credit card work? A magnetic strip has three tracks that hold all of the information pertaining to a card by magnetizing tiny iron particles. We have probably all seen a credit card with a magnetic strip and we have all heard that you shouldn’t keep your credit card
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Are electric planes possible? Electric planes are possible, but not for long distances yet. Electric cars are a very common site on the road these days, and you would think electric planes would be the next step, but electric planes are much harder to make than we think. The main problem is the range they
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Why do planes use halon fire extinguishers? Halon fire extinguishers are used on planes because they don’t conduct electricity, they don’t leave a residue, they put out the fire effectively, and they are not very toxic to people. There are many different types of fire extinguisher, but they all work on generally the same principle.
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What caused the Irish potato famine? The direct cause of the Irish potato famine was a potato fungus called Phytophtora infestans, which wiped out several years of potato crops. Other factors were the style of farming, the dependence on potatoes, continuing exports from Ireland, and the UK government’s unwillingness to help. The Irish potato famine
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