This month Christine Vincent introduced us to the life of African American Charles Richard Drew who was a surgeon and medical researcher. He researched in the field of blood transfusions, developing improved techniques for blood storage, and applied his expert knowledge to developing large-scale blood banks early in World War II. This allowed medics to save thousands of lives of the Allied forces. Thank you Christine.
My presentation was about energy and energy changes, for instance, chemical energy is converted to kinetic energy when a firework explodes and our chemical energy from food is converted to heat and kinetic energy when we move about.
The law of conservation of energy is a physical law that states energy cannot be created or destroyed but may be changed from one form to another.
We were joined via Zoom by two guests Chris and Ann, from Port Macquarie in Australia, which is about 390 km north of Sydney. Chris is a native of Hucknall and his sister Cynthia is a Hucknall u3a member. Chris had sent me a short video which demonstrates energy changes made as part of a school science task by his grandson James who is 14. I was given consent to show it so thank you James. It demonstrates how the energy of an object can be transferred to another with the process doing some useful work at the end. Basically an intricate domino effect involving a moving car, falling books, weights and an electrical lamp.
Before we finished we heard about how Australia had been dealing with Covid-19.
Next (Zoom) Meeting: Friday November 20th, 10am to 11am.
John Tedstone will be talking about another aspect of energy and I will be posing the question ‘What is Rocket Science’?
David Rose