When I first saw the silver sparkling necklace in the jewellers shop window, I thought it was just an ordinary diamond necklace. However, the twinkling diamond at the centre of the polished masterpiece held an emotional attraction for me, as it reminded me of a similar diamond on my grandmother’s ring, so I went in to inquire its price.
Have you ever thought about the people who make movies? Did you know that less that 20% of the main decision making positions in the media are held by women? This obviously affects the way that women and girls are portrayed on screen.
With media platforms like YouTube or Vimeo, its easier to get friends together and write, direct, edit your own shows and distribute them for the world to see, but where do you start? How can you make a movie? One way is to take part in a Apple Camp – check the link to see if there is one in your area.
Once you have been making films for a while, you may want to learn more about how movies are made, and how to put them together. A new venture in California aims to help girls do this – on a one week camp.
Our contributor Annie May had a chat with Esther from Camp Reel to find out more.
The Roman wooden toilet seat. Not looking bad to say it’s 2000 years old! (Source.)
When we talk about electric batteries, we often talk about voltage. But did you know that this word is named after the person who invented the first electric battery? First, let’s take a look at what a volt is, and then we’ll find out more about the guy who gave the ‘volt’ its name.
A volt is defined as a unit of electric potential and electromotive force, and voltage refers to the number of those units. That sounds a lot more complicated than it is! If you think of the water in a tap being like the electricity running through a wire, the voltage means the amount of pressure. This video is quite long but explains it very well.
Alessandro Volta
The term actually comes from a name. It was coined in honour of Italian physicist Alessandro Volta, who is recognised as the inventor of the first electric battery. During the 1790s, Volta worked on the theories of electricity of the day.
Volta disagreed with the theory proposed by fellow Italian scientist Galvani that electricity was generated by animal tissue. Instead of experimenting on frogs or other animals, Volta did experiment after experiment with metals.
His persistence paid off, and in 1800, he invented the world’s first battery, known as the ‘voltaic pile’.
This voltaic pile was simple but ingenious. It consisted of a pile of zinc and silver discs. But alternating between them was a piece of cardboard, or a piece of cloth, that had been soaked in saltwater.
There was a wire that connected the zinc disc on the bottom to the silver disc on the top, and this wire was capable of producing sparks.
The invention of the first electric battery brought Volta the most fame and recognition, but he also made other discoveries. He invented the electrophorus, a device that could transfer an electrical charge to other objects, as well as an electrical condensor, and the voltaic cell.
He is also known for having discovered and isolated methane gas. After his death, the volt and voltage were named in his memory.
Luigi Galvani
Yet there is one more twist to the tale. Volta’s longstanding colleague Galvani of the animal electricity theory also left his name in our language. When we say ‘galvanise’ or ‘galvanism’, that is where it comes from.
Despite their differing theories, there was no rivalry between the two scientists. They were both more concerned with the pursuit of knowledge than with whose theory would prove to be right, and it was Volta who first coined the word ‘galvanismo’ in Italian.
Featured Image by Thomas Kelley on Unsplash
What made you agree to be part of the Remarkable Women campaign, and what do you hope to achieve with your involvement?
