Inverted test tube retains liquid

 Sometimes it is the little things that amaze students. During electrolysis they filled test tubes with solution, inverted them and were surprised when the liquid did not come out.

As to why this causes quite a discussion

Ticker Tape Timer

 Ticker tape timer. When introducing students to motion I find this is a great way to get the students to understand what is going on, make charts to stick in their book and then move on to electronic forms of recording. #iteachphysics

Electrical Choices

Which Fuse should I use? How safe is a UK Plug? What is a trip switch? - Frightening ideas and choices from students.

Drexel University chemical engineers create a new Li-S battery that outperforms rival Batteries.

A group of Drexel University chemical engineers have found a way to introduce sulfur into lithium-ion batteries which has improved the capabilities of the battery. The discovery is a new way of producing and stabilizing a rare form of sulfur that functions in carbonate electrolyte, which is the electrolyte gel used in commercial Li-ion batteries. This development would not only make sulfur batteries commercially viable, but they would have three times the capacity of Li-ion batteries and last more than 4,000 recharges. Previous versions of the Li-S batteries have already been shown to have improved performance in experimental settings using an ether electrolyte, rather than using the traditional carbonate. But these batteries are not be commercially viable. Replacing the cathode in Li-ion batteries with a sulfur one would alleviate the need for sourcing cobalt, nickel and manganese, which are toxic.

Using the Pasco weather Sensor in the Storm Eunice

 Using the Pasco weather Sensor in the Storm Eunice

Storm Eunice

 My @pascoscientific weather sensor ready and recording the weather and wind speeds. Just going to leave the sensor outside and stay inside today. #StormEunice #iteachphysics 

Modelling a Lift

 Creating an Attwood Machine to simulate a lift. Took the students ages to work out why it wouldn't connect to @pascoscientific Capstone. Looked at motors attached and the changing force required.