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
Monday 21 February 2022
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
Sunday 20 February 2022
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
Saturday 19 February 2022
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.
Friday 18 February 2022
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
Thursday 17 February 2022
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.
A level computing 12 Mark questions
Practice planning the 12-mark A-level computing questions. It is not just about getting the facts down but also about organizing them effect...
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Negative feedback is a difficult concept to try and get over so I tried using a balance board and the @pascoscientific smart cart strapped...
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Getting a classic set of results for the titration of NaOH and HCl is not that difficult but it is nice when we can get students to this ...
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Reactions with the different Alcohols to see the change in rate and water for comparison and why not to react with acids. An extra experime...