Tagged Questions

4
votes
2answers
194 views

How do you calculate power at the focal point of a mirror?

I'm a Mechanical Engineering student and I'm working on my senior project, so I need help. My project is about designing a solar dish having a diameter of 1.5 meters and a focal length of 60cm. so at ...
2
votes
2answers
292 views

Harvesting electricity in the air from power lines:

Recently I came across this quote on the internet, about a person who apparently set up devices to extract electricity from the "air", on his own property: I read an article a couple of years ago ...
0
votes
0answers
112 views

Antenna Power and gain calculation [closed]

I have a wireless security related question, the second part confused me: Your wireless network usually has a range of 100 feet. However you are having a (confidential) meeting in a 10’ x 10’ x ...