Who invented a computer?
Cai Lun
Charles Babbage
Thomas Watson
Hans Lippershey
Who invented papers?
Cai Lun
Charles Babbage
Who created the first long-lasting light bulb?
Alexander Graham Bell
Galileo Galilei
Thomas Edison
Thomas Watson
A sundial/shadow clock can be useful in
rainy days
stormy days
cloudy days
sunny days
Why did Wright Brothers build their own engine?
The engine was too expensive.
There was no such powerful engine available.
Who was the first to aim a telescope to the sky?
Hans Lippershey
Galileo Galilei
Charles Babbage
Wright Brothers
What gas that lifts up an airship to the sky?
Helium
Oxygen
Krypton
Hydrogen
What is the object that casts a shadow on the dial of a sundial?
dial
gnomon
What is an invention?
A new creation.
A plagiarism.
Who discovered the law of pendulum?
Thomas Watson
Galileo Galilei
Charles Babbage
Montgolfier Brothers
Who invented the first engine-powered glider?
Abbas Ibn Firnas
Wright Brothers
Montgolfier Brothers
Hans Lippershey
What is NOT a timekeeping device back in the olden days?
water clock
sundial/shadow clock
candle clock
smartwatch
Who invented the first telescope?
Neil Armstrong
Galileo Galilei
Hans Lippershey
Alexander Graham Bell