Calling a Cosmologist

[TheGreenGoblin]

I am learning to fly a helicopter. Of course I understand torgue....

For every action there is equal and opposite reaction...

Angular acceleration, turning affect etc. etc.

I DO understand this...

https://www.grc.nasa.gov/WWW/K-12/airplane/torque.html

Have you watched the video?

[Boac]

In a word, no.

[TheGreenGoblin]

In a word, no.

PS - I am thoroughly enjoying this thread...

[PHXPhlyer]

TGG:
Very jealous!
Whirlybird rating is on my list. I am trying to work out a gyro rating first then the helicopter rating is just an add-on.
What are you training on?

PP

[TheGreenGoblin]

TGG:
Very jealous!
Whirlybird rating is on my list. I am trying to work out a gyro rating first then the helicopter rating is just an add-on.
What are you training on?

PP

It is is a must PHXPhlyer!

Training on the R44. I am desperately frustrated at the moment by the lock down, as I feel my recently hard won skills atrophying for want of practice.

I have only had one flight in a gyrocopter, a RAF2000, owned by an old school mate who is an instructor. Flying at 20 foot above the beach at full chat was memorable (albeit probably illegal).

[TheGreenGoblin]

Some interesting words on Roger Penrose, well deserved 2020 winner of the Nobel Prize for Physics. (shared with Reinhard Genzel and Andrea Ghez).

https://www.theguardian.com/science/202 ... les-itself

Written by a journalist though so one must expect some drivel...

Think of the waves that persist in a pond after a stone has been dropped into the water, forming concentric circles of increasing size. In this case, the pond is the entire universe, and the stone that fell into the water a collision between colossal black holes that occurred before the big bang …

... Er..No!

But light obviously moves at, well, the speed of light – so, for light, time never passes at all. In this sense, light “won’t get bored”.

Well if it was possible for a human to travel at the speed of light, which it is not, in his or her frame of reference time would appear to pass as normal although the perceived universe would look very strange indeed and towards the dark end of our expanding universe a photon would effectively be travelling at the speed of light but effectively going nowhere due to the expansion of space, faster than the speed of light itself. It would be a time of loneliness and utter futility...




Currently reading reading "The Many World's of Hugh Everett III" by Peter Byrne. Well worth reading for those are interested in this kind of thing.

https://www.scientificamerican.com/arti ... biography/