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 ...

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 ...

Just because you see something done in a movie, that doesn't mean you should try it yourself. Take, for example, a human running on top of a moving train. ...

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 ...