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100
Approximately 10% of the power that is consumed by a light bulb is emitted as visible light. What is the 90% emitted as?
The rest is emitted as heat.
100
Which invention was developed by Thomas Edison?
The light bulb was developed by Thomas Edison between 1878 and 1880.
100
Who made the discovery of the Theory of relativity?
Albert Einstein (1915)
100
Which name is associated with the invention of the X-ray machine?
W. C. Röntgen
200
Which invention has made it possible to make electronic devices portable?
Most modern devices, e.g. mobile phones, torches, music players and laptops, use batteries, which allow them to be carried around rather than remaining plugged in to an electrical supply.
200
When did Johannes Gutenberg improve the moveable type printing technology?
Johannes Gutenberg improved the type printing technology in 1450.
200
Who discovered that the earth circles the sun?
Copernicus (1543)
200
Which name is associated with the invention of the telephone?
Alexander Graham Bell
300
What is the name of the molecular unit of heredity?
It is called a gene.
300
When was the first commercial steam engine invented?
In 1712 Thomas Newcomen invented the first commercial steam engine which was improved by James Watt later.
300
Who discovered the laws of motion and gravitation?
Isaac Newton (1687)
300
Which name is associated with the invention of the petrol-powered automobile?
Carl Benz
400
The creation of an artificial human being was presented in which novel?
"Frankenstein" by Mary Shelley (1818)
400
When was gunpowder invented?
The Chinese invented gunpowder during the 9th century.
400
Who discovered the structure of DNA?
Francis Crick and James Watson (1953)
400
Which name is associated with the development of the atomic bomb?
J. R. Oppenheimer
500
Until 1956 computers used huge vacuum tubes and for this reason, the ENIAC, the first general-purpose computer, contained 17,468 vacuum tubes and weighed 27 tons. Which invention made it possible to build small computers?
Transistors made it possible to build small computers.
500
When was the first compass for maritime navigation developed?
around 4000 BC (unknown by whom)
500
Who successfully discovered cloning by cloning the sheep Dolly?
Roslin Institute (1996)
500
Which name is associated with the invention of the heavier-than-air flying machine?
Wright brothers