Today I Learn

2021-12-11 07:51:10 10 most popular websites on the web.

The top 10 most popular websites on the internet according to Alexa are:

Google.com (Alexa rank: 1)

Youtube.com (Alexa rank: 2)

Tmall.com (Alexa rank: 3)

Baidu.com (Alexa rank: 4)

Qq.com (Alexa rank: 5)

Facebook.com (Alexa rank: 6)

Sohu.com (Alexa rank: 7)

Taobao.com (Alexa rank: 8)

360.cn (Alexa rank: 9)

Yahoo.com (Alexa rank: 10)

Alexa rank is a measure of website popularity with 1 being the most popular. It is calculated by the site’s estimated traffic and visitor engagement.

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2021-12-11 07:46:59 How do earphones work ?

Earphones, or headphones, work similarly to speakers in that they turn electrical energy into sound by using magnetism and the vibration of air.

While a large speaker vibrates the air in the space around it to create sound, a pair of earphones only vibrates the air inside the ear canal.

Earphones are usually designed as either closed-back or open-back, which affects how much sound can escape from them.

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2021-12-09 16:50:19 How does cockroach move ?

These somewhat resemble antennae, and they can behave as sensory organs.

A nerve inside the roach allows it to detect air movement around its cerci.

This is one reason roaches can move out of the way very quickly if you try to catch or crush them.

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2021-12-09 05:47:29 How does website works ?

The browser connects to the server through an IP Adress; the IP address is obtained by translating the domain name. - In return, the server sends back the requested page. 

Web pages are written in HTML, Hypertext Markup Language.

In order to host your page on a web server you need to pay a hosting charge.

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2021-12-08 05:04:51 How do electric eels generate a voltage ?

The electric eel (Fish) generates large electric currents by way of a highly specialized nervous system that has the capacity to synchronize the activity of disc-shaped, electricity-producing cells packed into a specialized electric organ.

The nervous system does this through a command nucleus that decides when the electric organ will fire.

When the command is given, a complex array of nerves makes sure that the thousands of cells activate at once, no matter how far they are from the command nucleus.

Each electrogenic cell carries a negative charge of a little less than 100 millivolts on its outside compared to its inside.

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2021-12-07 15:50:29 Why does octopus have 3 hearts?

Octopuses have three hearts. Two branchial hearts pump blood through each of the two gills, while the third is a systemic heart that pumps blood through the body. 

Octopus blood contains the copper-rich protein hemocyanin for transporting oxygen.

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2021-12-06 14:53:12 Today I Learn pinned a photo Open / Comment

2021-12-06 14:51:02 Planning your home, but haven't decided how it should look?

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2021-12-06 14:37:34 What is open sky offer?

Open Sky Policy: Open sky refers to an agreement between two countries to allow any number of airlines to fly from either of them without any restriction on number of flights, number of destinations, number of seats, price and so on.

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2021-12-06 07:23:31 The Difference Between Block Chain and Traditional Payment Method

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