science

How do electric vehicle batteries degrade over time?

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Electric vehicle batteries degrade over time due to chemical reactions inside the cells that reduce their ability to store and deliver energy. This degradation happens naturally through use, charging cycles, and exposure to heat.

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What is a winter storm warning and how does it differ from a winter storm watch?

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A winter storm warning means dangerous winter weather is happening or about to happen and you should take action immediately, while a winter storm watch means winter weather conditions are possible in the next 12-48 hours and you should prepare. Warnings are more urgent than watches.

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What is meldonium and what is it used for medically?

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Meldonium is a medication developed in Latvia that helps improve blood flow and oxygen delivery to the heart and brain. It was originally used to treat heart disease and improve athletic performance, but is now banned in most sports due to doping concerns.

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What is the difference between a tornado warning and a tornado watch?

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A tornado watch means conditions are favorable for tornadoes to form in a region, while a tornado warning means a tornado has been sighted or indicated by weather radar and poses an immediate threat. A watch is preparation time; a warning requires immediate action.

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What causes seasonal temperature variations in Portland?

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Portland experiences seasonal temperature variations because of changes in the sun's angle and the length of daylight hours throughout the year. During winter, the sun is lower in the sky and days are shorter, causing cooler temperatures, while summer brings a higher sun angle and longer days, creating warmer temperatures.

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