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nowadays, it kills people
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How old was Thomas Edison when he invented lightbulbs?
Thomas Edison's greatest challenge was the development of a practical incandescent, electric light. Contrary to popular belief, he didn't "invent" the lightbulb, but rather he improved upon a 50-year-old idea. In 1879, using lower current electricity, a small carbonized filament, and an improved vacuum inside the globe, he was able to produce a reliable, long-lasting source of light. He was 32 years old.
Which inventions made use of light?
Thomas Edison's greatest challenge was the development of a practical incandescent, electric light. Contrary to popular belief, he didn't "invent" the lightbulb, but rather he improved upon a 50-year-old idea. In 1879, using lower current electricity, a small carbonized filament, and an improved vacuum inside the globe, he was able to produce a reliable, long-lasting source of light.
What did Thomas Edison use for his light bulb?
Thomas Edison's greatest challenge was the development of a practical incandescent, electric light. Contrary to popular belief, he didn't "invent" the lightbulb, but rather he improved upon a 50-year-old idea. In 1879, using lower current electricity, a small carbonized filament, and an improved vacuum inside the globe, he was able to produce a reliable, long-lasting source of light.
What d oes the writer imply by saying the wind must have been right?
Although this might depend upon the context, it is a similar saying to 'the stars must have been aligned.'
What is fround upon?
Frowned upon? As in, looked at poorly.
When was the shoe last invented?
Shoes are constantly being invented and improved upon. Some shoes could have been invented just yesterday or last week for example.
How did the Phoenicians improve upon the Sumerian invention?
The Phoenicians improved upon the Sumerian invention by when the Sumerians invented the first writing system (symbols and cuneiform) the Phoenicians invented the alphabet which was easier.
Who found s orbitals?
The man who first suggested orbitals (in their most primitive form) was Neils Bohr - the concept has been improved upon since him however.
Has the typewriter been improved upon or change in the past 100 years?
yes
What questions really need improved on WikiAnswers?
All the questions that have been flagged are usually the ones that need to be improved, questions that do not make sense should also be attempted to be improved upon.
Can you use improved upon to end a question?
Yes this is possible. For example: How do you think the plan can be improved upon?
What weapon replaced the atomic bomb?
It hasn't been replaced with anything, just improved upon by variants.
Who was the inventor of the vacuum tubes?
Lee de Forest was the inventor of the first electronic amplifying tube, the triode. His understanding of how his invention worked was far from correct, but nevertheless he had invented the first electronic valve. Rectifying tubes had been invented earlier by J A Fleming, and it was these that de Forest improved upon - magnificently.
When was the iron created?
The first iron was a heated rooling pin used in Greece around 400 B.C. The first flat irons appeared in Europe in the 1300s, The electric iron was invented in the 1880s when electricity became widely available in homes. The first electric iron was patented by Henry W. Seeley in 1882 and has been improved upon ever since.
Who improved upon Roman concrete in 1824?
Portland
Who made bubble gum?
Bubble gum was invented in 1855 by Paul B. Fay. It was improved upon because the original design wasn't very good and in 1911 it was made available to the public.
Which the colonists improved their social status depended upon?
Landownership.
