Last month the The RRS Discovery, the most advanced research ship was launched in Southampton.
At £75 million it is one of the most expensive research ships ever commissioned. It measures at just over 100 metres long, with seven main laboratories and a bridge like the Starship Enterprise! It has just begun expeditions around the British Isles, currently examining the UK’s continental shelf, a band of sea floor around 50m-100m deep.
“These shelves are really very important,” says Dr Sanders from the National Oceanography Centre in Southampton. “There is a lot going on in the shelf seas and we need to understand how they work so we can safeguard their future.”
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.
What is a Volt?
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.
Why are Volts Called Volts?
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’.
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.
What else Did Volta Invent?
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.
What about Galvani?
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.
The pupils of Bruntville Primary School have written a short article about the history of South Africa, and an explanation of Apartheid.
What Was Apartheid?
Apartheid was a system that existed in South Africa that separated people based on their ethnicity and skin colour. It became law after the National Party won the election in 1948. They declared many areas as only for white people, and discriminated against people of colour (POC).
You might be starting to think about which subjects you want to study at school, perhaps you have even had a talk about careers.
One thing that is quite tricky to assess is what a job is REALLY like. Some jobs are quite easy to imagine, such as working as a teacher, because we see the work that teachers do every day. Some jobs are a bit of a mystery. What does an engineer actually DO? And what do you have to study, to become one?
Today we are introducing a new series of articles, which will show you the typical working life of people in many different professions. If you know someone who has an interesting or unusual career, ask them if they would agree to a short interview with us to show kids a day in their life.
We were lucky enough to interview Tasha Scott, who was happy to explain to us her studies and career as a Structural Engineer.
Since Levi Strauss and Jacob Davies developed jeans all the way back in 1873, denim jeans have become the garment we reach for at the weekend. They are attractive, hard-wearing and versatile, so it’s no wonder that we spend so much time in them, and so much money on them. In the US alone about 450 million pairs of jeans are bought each year.
But what do you wear when you get bored of jeans? Is there really a comfortable, suitably casual alternative? Lissie, who blogs at GrungetoGoddess has some ideas for those who have the denim blues.
