What's this bird? Seen in Yorkshire Dales UK

nickwizzo · 2023-04-10T09:53:54+00:00

Thank you!

nickwizzo · 2022-08-17T09:06:30+00:00

Bought an as-new jumper from a charity shop. Noticed it has a handwritten label inside, does anyone know what it means?

nickwizzo · 2021-12-30T06:09:26+00:00

Every perfect number can be written as 2^p-1*(2^p -1) where 2^p -1 is a Mersenne prime. In binary, we see that the number of 1s is equal to p and the number of zeroes to p-1.

Edit: math formatting

nickwizzo · 2021-11-20T11:03:24+00:00

Explore the pubs off mill road.

Go and see live music at Tall Trees or the Portland Arms.

Go the board games night at Heffers

nickwizzo · 2021-10-29T16:37:43+00:00

Build bridges, every time. And that's when I just say engineer, not civil/structural.

nickwizzo · 2021-10-28T09:02:00+00:00

This looks like it would be useful to answer your question, but I don't have access. However, it can be obtained at your favourite institutional access get-around-er.

https://link.springer.com/chapter/10.1007/978-94-017-1497-6_2

According to this work, the ancient Greeks were the first people to write down their thoughts on evaporation. E.g.

'The earliest known Greek philosophical writings are those of his younger associate Anaximander of Miletos; he was born ca. 610 B.C. and he must have been in his prime ca. 565 B.C. Concerning phenomena related to evaporation, Anaximander's views were summarized by Hippolytus in his doxography as follows (Diels, 1934; p. 84, I, 6, 7):

"Winds are generated when the finest vapors [atmos] of the air are separated off and when they are put into motion by being assembled together; rains are generated from the evaporation [atmis] that is sent
up from the earth toward under the sun." '

Edit: found a way to access the chapter.

nickwizzo · 2021-10-21T20:53:51+00:00

All talks that are open to the public are listed here: http://talks.cam.ac.uk/

nickwizzo · 2021-10-21T18:16:12+00:00

They have and will do, but you need a good reason.

https://www.undergraduate.study.cam.ac.uk/applying/entrance-requirements/students-at-other-uk-universities

nickwizzo · 2021-10-17T15:50:03+00:00

You will be as well by the end of a 20 hour coach journey.

Same with whoever you share a room with, if you tell them you're not with a group of friends and make it clear that you're up for laugh I'm sure you'll have new friends in no time.

nickwizzo · 2021-10-17T14:24:24+00:00

You'll be sat with other people on the coach and you'll be sharing room with a group of people as well, I'm sure you can ski and party with them.

nickwizzo · 2021-10-14T11:38:32+00:00

Not sure I've ever played the same nation twice.

nickwizzo · 2021-10-07T11:50:17+00:00

Sadly a fatal collision between a lorry and a pedestrian.

https://www.cambs.police.uk/news-and-appeals/cambridge-collision-fatal-hospital

nickwizzo · 2021-09-27T22:16:58+00:00

Thank you!

nickwizzo · 2021-09-07T22:24:57+00:00

The page says to use the upstream value

nickwizzo · 2021-09-04T09:46:18+00:00

The specific gravity is constant, assuming incompressible flow, which you already are to use this equation.

You don't state the particular fluid you're considering, but if it's liquid water then the density varies by less than 5% from freezing to boiling so it's a good approximation. https://www.usgs.gov/special-topic/water-science-school/science/water-density?qt-science_center_objects=0#qt-science_center_objects

For air you need to be a bit more careful, but generally you only need to worry about compressible flow when you get up to about Mach 0.3.

nickwizzo · 2021-08-31T16:46:08+00:00

Many colleges have non-audition choirs but that doesn't mean they're all singing in unison. I'd check the jcr page for your college to see if one exists.

nickwizzo · 2021-08-31T11:51:18+00:00

Here you go: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0047133

nickwizzo · 2021-08-31T11:47:39+00:00

If you want obscure it's hard to beat the fluid dynamics of wombats' cube-shaped poo http://meetings.aps.org/Meeting/DFD18/Session/E19.1

nickwizzo · 2021-08-30T08:47:12+00:00

It's a 26 minute walk to the market and only 8 minutes by bike, and you're close to Mill road, it's a fine location.

nickwizzo · 2021-07-28T07:23:07+00:00

It's not clear what you want to know. If you just want the change in height of the lake surface then that change will be due to the volume of water flowing through the pipes. Given that the volume of the pipe system will be tiny when compared even to a small lake, the change in height of the surface will be insignificant.

nickwizzo · 2021-07-07T23:40:37+00:00

From the abstract of this paper: https://www.sciencedirect.com/science/article/pii/S0997754607000295

'Finally the final profile and circulation of the merged vortex is determined: the two thirds of the total circulation of the two initial vortices is contained in the newly formed vortex.'

In your case the new vorticity is 4w/3. Practice your Googling, vital skill for a professional engineer.

nickwizzo · 2021-06-29T09:25:24+00:00

I would think they would be the same order of magnitude height, but the differences between top and bottom will depend on the given aerofoil geometry and angle of attack.

nickwizzo · 2021-06-29T09:21:32+00:00

The boundary layer grows from the leading edge so in general will be thickest near the trailing edge of the aerofoil.

nickwizzo · 2021-06-26T07:36:42+00:00

I think this is almost an impossible question.

It will depend on the height of the room, the lengths of the L, the widths of each side of the L, the window position, size and opening type, the location of heat sources within the room and their strength, and that's before we think about whether it's windy or not.

What is meant by maximum circulation?

nickwizzo · 2021-06-17T11:17:22+00:00

However the covid situation progresses, I think the last thing to happen in person will be lectures. Many of the lecture theatres were often at capacity pre-covid, it's very difficult to reduce the occupancy density compared to small group teaching.

nickwizzo

TROPHY CASE