Add Papers Marked0
Paper checked off!

Marked works

Viewed0

Viewed works

Shopping Cart0
Paper added to shopping cart!

Shopping Cart

Register Now

internet library
Atlants.lv library
FAQ
3,49 € Add to cart
Add to Wish List
Want cheaper?
ID number:175747
 
Evaluation:
Published: 20.04.2021.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

Clock
The earliest known clock with a water-powered escapement mechanism, which transferred rotational energy into intermittent motions.
The first mechanical clocks, employing the verge escapement mechanism with a foliot or balance wheel timekeeper, were invented in Europe at around the start of the 14th century, and became the standard timekeeping device

8. Alexander Graham Bell and telephone
Alexander Graham Bell, best known for his invention of the telephone, revolutionized communication as we know it. 
In 1871, Bell started working on the harmonic telegraph — a device that allowed multiple messages to be transmitted over a wire at the same time.
Bell secured exclusive rights to the technology and launched the Bell Telephone Company in 1877. 

9.  Refrigerator
The concept of mechanical refrigeration began when William Cullen, a Scottish doctor, observed that evaporation had a cooling effect in the 1720s.
William Cullen who designed a small refrigerating machine in 1755.
He used a pump to create a partial vacuum, ether boiled and absorbed the heat from the surrounding air. This resulted in a small amount of ice.

Author's comment
Load more similar papers

Atlants

Choose Authorization Method

Email & Password

Email & Password

Wrong e-mail adress or password!
Log In

Forgot your password?

Draugiem.pase
Facebook

Not registered yet?

Register and redeem free papers!

To receive free papers from Atlants.com it is necessary to register. It's quick and will only take a few seconds.

If you have already registered, simply to access the free content.

Cancel Register