Cooking steaks. Thawed or frozen?

Conventional wisdom holds that all meat should be thawed before cooking. But with modern freezers, ovens and frying pans, does it still apply? America’s Test Kitchen has taken it upon themselves to test this wisdom and thoroughly observe the result. While not arriving at a clear answer, they found a lot of interesting effects by frying steaks right out of the freezer. We guess it all comes down to personal taste, but if you are a meat gourmand, you should definitely watch this video to make sure that conventional wisdom doesn’t prevent you from finding a new favorite way of cooking steaks!

The science of the siphon effect

The siphon effect is a very interesting one. It is a normal part of your life, because every time you flush your toilet, it uses the siphoning effect. And when your gasoline powered lawnmower is out of fuel, you may resort to draining some gas from your car with a hose, again using the siphoning effect. mist8k has added to the possible uses of siphoning by making this excellent scientific demonstration. Here, the siphoning effect is used as an extremely simple on/off valve, controlled by the level of the liquid. Fill the container and nothing happens. But fill it too much and ALL the liquid will drain out, not just the excess! This solution could be a great way to make a reliable security system that dumps out all the liquids if a tank is in danger of being overfilled. No control systems required!

How to make a static electricity motor

Most electrical motors uses electromagnetism in order to transform electricity into mechanical work, but there’s another type of motor, the electrostatic motor, that works differently. Instead of using magnetism, electrostatic motors uses high voltage to attract and repel parts of the motor, causing them to turn. There are many ways of making such motors, but most tend to have very low strength and torque. There are the exception to this rule though, and in these videos from RimstarOrg one such exception is studied in detail. It is called the “Corona motor” and apart from being cheap to build, it also have high enough strength and torque to be a viable motor for practical applications! The downside is that it needs very high voltages, and if you try this build, be extremely careful not to get a shock! And if all possible, avoid using high voltage transformers that plug into the wall socket. They can kill. We are not kidding.

 

 

Forming steel with….a pressure washer?

Hydroforming is a process that can be a blessing when you want to make smooth inflated-like objects from flat pieces of steel, but has been overlooked because most people doesn’t realize how easily it can be done. In this video, the mad genius colinfurze demonstrates how you can modify your (or your neighbors) pressure water to hydroform anything you want! And if you think this is just a cute trick, you’re wrong. Just watch the video below and see how colinfurze uses this very technique to make a fully working pulse-jet engine!

Making glass stronger with….food preservatives?

This is an extremely interesting scientific demonstration by Ben Krasnow at Applied Science on why materials like glass breaks, but most importantly how you can improve the strength of the glass by a very simple process. Other similar hard materials like pure concrete, wood and cast iron breaks in exactly the same manner, but glass is one of the few materials whose strength can be increased through a simple chemical process. The only chemical needed is called potassium Nitrate (Saltpeter) which is a common food preservative and readily available to the public! It’s amazing how much difference a bit of scientific knowledge can make.