I get a minimum height of 2.5R. So if the loop is 4 meters high (with a radius of 2 meters), the car would have to start 5 meters above the ground to just ...
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Climate change. It's bad and it's getting worse. The main cause is burning fossil fuels, which spews CO2 into the atmosphere. Carbon dioxide, as we all know ...
The aurora borealis is usually visible only way up north, but two weeks ago the night sky was filled with shimmering curtains of pink and green light that ...
Melting an ice cube takes 3.34 x 105 joules per kilogram. So a single ice cube with a mass of 50 grams would take 16,700 joules. You can already see that ...
If you live in the US and missed the last total solar eclipse in 2017, good news! You're about to get another chance. There will be a total solar eclipse ...