School of Physics

If there are so many (so many that it can be considered infinite) number of stars, then the night sky should be bright.
Even though the speed of light is finite, that still doesn't make sense.

This is quite a shock to me.
In my home country, there was almost no essay writing test on physics in high school. We were exposed in applying and deriving various law of physics to solve particular problems. In fact, I think the calculation in uni is still too basic.

Police officers when trying to give warning shot, they shot straight up in the air. Is this a good idea? What goes up must come down. It won't happen to the officer who shoots, cos when it gets to the top, the wind will change the vertical position of the bullet. There was an experiment where they f...

angle.alpha wrote:That is definitely not true if you are using SI units....

Please note that when someone measuring gold, or any precious metals, especially silver and gemstones, troy weight is used.

When I was a little kid, someone had asked me a question. What's heavier a ton of gold or a ton of feathers? At first I answered gold but later I've been told that they were actually in balance. A ton of something is weighted a ton of something. Nothing could be further than the truth. One of them I...

Well, I learned something today.
If you want to make ices, use hot water.