u/emarcomd

I can't even do the easiest beginner Kratky! I truly have the ungreenest thumb.

SEED: "Salad Bowl Green Leaf Lettuce" from True Leaf.
MATERIAL: "Potting Soil for All Plants" (bought in a shop)
CONTAINER: various, but they're all over a 1/2 gallon
NUTRIENTS: Maxi-grow 10-5-14
PH: 5.5 - 6

So, here's what I did..

Put some potting soil in the cup, put seeds in, put some more soil on top, moistened it. Then covered it in a humidity dome for a few days. I literally can't remember if I did blackout or not! I think I did for maybe one or two days.

Anyway, they're on an East-facing windowsill.

The roots are.... sad-looking. (see last picture) I know the seeds are okay because I did microgreens with them and got lovely roots.

So is the leggy-ness of this lettuce due to..

• improper germination
• not having a fan on 100% of the time?
• not enough light / too much light?
• not enough soil?
• should have weighted it with something other than just soil?
• not enough blackout?
• something else entirelly?

Thanks in advance. I love looking at everybody else's amazing stuff.

https://preview.redd.it/cn2gx93od99h1.jpg?width=3024&format=pjpg&auto=webp&s=4e4f9ab50475db31f1f2f36362f9f5a56764f8c5

https://preview.redd.it/wotr2trud99h1.jpg?width=3024&format=pjpg&auto=webp&s=2f104fb02506181d3f2a92646ffde6392be5ff84

https://preview.redd.it/ndlh34g1e99h1.jpg?width=3024&format=pjpg&auto=webp&s=87e9250b7eb03c05d5dddfc41b2fdd339d4a98a9

https://preview.redd.it/mddk8dlee99h1.jpg?width=2223&format=pjpg&auto=webp&s=5bc58c84830ee2b4bc4ee030b884cf8020f4bbb0

A) outgoing prof who used it
B) incoming prof who will be using it

Because I always erase the board and have to get on a chair to erase the math left by a previous prof. (The chalkboard is huge, I’m short, and whoever the prof is covers every inch of it.)

But before I contact the prof to ask them to erase it going forward, I thought I’d check in to see if perhaps there’s a consensus that it’s on the incoming prof to erase.

So I’m interested on folks’ thoughts

Yes, out of 100.

They actually got a 6, but that was with 5 extra credit points for answering 5 opinion questions.

They attended class (mostly) but always late. A one. A ONE.

ETA: High score of 90, average of 68

Hi Folks-

I'm a volunteer scuba diver at an aquarium. (Basically I vacuum up sea lion poop, scrub coral, stuff like that.). So this is probably super easy for you guys, but I'm a physics dim-wit

Well, we have to become "Scientific Divers" which means we have to take a training created by the American Academy of Underwater Scientists (That's the AAUS in the title). I'm currently doing the section on "Diving Physics" and am struggling with their answer on an example.

The problem is:

>A scuba cylinder stored at 70°F and at a pressure of 3000psi is moved to a beach where the cylinder warms to 95°F.  What affect does this have on the pressure of the cylinder?

I thought it would be straightforward, but I'm not getting their solution and have two questions about it.

First, here's their solution. I'm going to copy/paste from their training.

(Their solution is actually my problem)

Now, I follow most of that, but here are my two (actually, three) questions...

1). If the cylinder is being stored at sea level, isn't that an additional 1 atm? So shouldn't it be 205.08atm rather than 204.08?

2). If it's actually supposed to be 204.08atm, I'm not getting 214.46atm as an answer in that equation. I'm getting 213.712412634 atm

3.). Why do we need to convert to atm in the first place if we want the answer in PSI and the unit given in the problem is in PSI. Does Amontons' Law only work when the unit is in atms?

Thanks for any help you can give an old scuba diver who just wants to keep vacuuming up sea lion poop.