The steel coil looks like nothing more than a piece of metal, but it’s really a storage container for potential energy ready to get up … Read More

To put it another way: if you have to haul a heavy suitcase up a long staircase, do you notice the difference between efficiency and … Read More

Drop your phone off your shoulder. On contact with the ground, it smashes into pieces on the concrete floor. But if you think it’s the … Read More

In high school physics class, we solved a lot of problems about dropping a ball in vacuum. But the real world has an atmosphere that … Read More

If you know about momentum then you can tell what is going to happen when two pool balls collid. Momentum combines an object’s resistance to … Read More

Physics problems start most of the time with a who-cares question: Where was something when it all went pear shaped? The answer is starting momentum. … Read More

The speed of sound vary with air temperatures; summer sounds are not the same as winter in a concert hall. Why? Sound waves has wavelengths … Read More

The principle is called kinetic energy, it’s the energy of movement. While a single grain of sand shot out of a revolver could shatter bone, … Read More

It is a numbers game. Hunting with a crossbow is a numbers game, but it isn’t forgiving. Manufacturers love to shout a single number like … Read More