The correct answer is A) Sir Walter Raleigh.
Sir Walter Raleigh was sent by Queen Elizabeth on three expeditions to the New World.
To do this task, Queen Elizabeth had one man and only one man: Sir Walter Raleigh (1552-1618). He had met Elizabeth when he was in the military and had a good relationship with the queen. In 1585, this explorer was named the captain of the Guard and received the order to explore new territories. So he planed and directed three important expeditions to the North American territory. Later in his life, he had problems with the Queen and was sent to prison.
In contrast to mechanical waves, electromagnetic waves can travel without a medium. This implies that electromagnetic waves can pass not only through solid objects like air and rock but also through empty space.
James Clerk Maxwell, a Scottish scientist, created a scientific theory to explain electromagnetic waves in the 1860s and 1870s. He realized that electromagnetic waves can be created when magnetic and electrical fields combine together. He compiled this electricity-magnetism relationship into what are now known as "Maxwell's Equations."
German physicist Heinrich Hertz used Maxwell's theories to explain how radio waves are transmitted and received. In honour of Heinrich Hertz, the hertz, or one cycle per second, is the unit of radio wave frequency. Two issues were resolved by his radio wave experiment. First, he had proven that the speed of radio waves was the same as the speed of light, which was something Maxwell had only theorized.
This demonstrated how radio waves are a type of light. Second, Hertz discovered how to create electromagnetic waves by causing the electric and magnetic fields to separate from wires.
learn more
brainly.com/question/25847009
#SPJ9
The answer you are looking for is True.
The purpose that social media applications were designed to serve is: <u>2. to help users</u> to build online communities.
<h3>What are the social media applications?</h3>
Social media applications are websites and applications that allow people to share information and make connections quickly, efficiently, and in real-time.
Some of the social media applications include:
- F-cebook
- Yo-Tube
- Wh-tsApp
- F-cebook Messenger
- Ins-agram
- WeCh-t
- TikT-k
- QQ
- Do-yin
- Sino Weibo.
Thus, the purpose that social media applications were designed to serve is: <u>2. to help users</u> to build online communities.
Learn more about social media applications at brainly.com/question/23976852
#SPJ1
