Archived threads in /sci/ - Science & Math - 1670. page

the size of your mums anus

>>8080452
He said hours not seconds

>>8080448
need the height of the container to solve it

>>8080434
Don't tell it to them

>>8080438
what if it's for an assignment

>>8080375
with air resistance 3

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uh oh, Looks like heavy winds

>>8080386
6

>>8080328
Goddammit, sorry it's upside down, I have no idea why

>>8080328
try >>>/diy/

I suppose you can help me with this quick problem:

20% for rain on Saturday, and 30% on Sunday. What's the probability for rain in weekend?

nope. i tried it once and got burnt out. just enjoy your holidays and work hard during the semester

>>8080305
yes

a few days of studying group theory while i was at a summer conference made the first 1/3 of the class a complete breeze while others were struggling trying to figure out cycle notation for symmetric group

>its a "Select all images with a store front.
Click verify once there are none left." episode

>>8080305
>>>/a/

>>8080242
>buying lab equipment
Holy fuck dude, how much money do you have?

I buy my glasswares at walmart. At the moment I am conducting an experiment to see whether there is a proton exchange when I mix baking soda with vinegar.

>>8080294
there is

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It is the only known object that can classify itself as an object.

>>8080042
What about A.I.?

>>8080054
show me an ai that can classify itself as an object

Calc 3 was supposed to be easier than Calc 2, according to "everybody"

I thought Calc 3 was harder.

I had a really shit teacher though (MA and PhD in education, not math)

>>8079846
>Calc 3 was supposed to be easier than Calc 2, according to "everybody"

>I thought Calc 3 was harder.
This.

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I took a class that was calc 2 and 3 crammed into one semester. I guess it got a little bit more difficult as the semester progressed.

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1 + 3 + 4 + 5 + ... = -(1/12)

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>>8079917
STOP

>>8079796
I don't get why people think there's any way that P = NP. It implies that it's possible to build a machine that can make random guesses from finite possibilities and always have the guess be the right one. It's absurd.

if you live in a major city contact MENSA.
If you're in college, ask if your psychology department does IQ tests.
If you have access to a mental health facility, often they can perform them as well.
Do not take internet IQ tests, not of them are valid in any sense.

Thank you

Go to a reliable psychologist.

You might have to pay for it however.

Platonism is codeword for postmodernism.

>>8079702
the exact opposite. Undergraduates trike again !

>>8079702
How's that?

Ok, I'll try and answer your questions in a way that's easy to understand without much background knowledge.

>how does one extra extract DNA from cells
For most labs, we have kits that allow us to burst open the cell and nucleus, and then filter out the DNA from other cellular components with specialised membranes.

>sequence the DNA genome
Lots of ways here. For whole genomes, is basically a lot of random sequencing all over the genome, followed by finding overlapping regions and assembling it into a whole genome.

> build custom genes
I'm not entirely sure what you mean by this. If you mean causing mutant genes, this can be done by adding chemicals which disrupt the gene replication, adding errors. If you're going for a specific mutation, then can be designed in with PCR (explained later).

>put the genes back in.
Enzymes are used to cut the DNA unequally, leading to short single strands being present. If the gene you want to insert has been cut by the same enzyme, it will attach to the single strands, and insert.

>Polymerase Chain Reaction
Aka PCR. It's an incredibly useful method for amplifying genes. By using two short single stranded DNA chains as primers, you can highlight the region to amplify.
Temperature is cycled to achieve the following: DNA is seperated into to single strands, primers bind to the complimentary site, and DNA polymerase uses the primer to start replicating the DNA. This is cycled multiple times to produce lots of the gene of interest.

>>8079533
I forgot one part of your question.

> put it back in the cell
By treating the cell with chemicals affecting the cells channels, you can induce a stress state with heat that causes the cell to uptake any DNA from the external area.

>>8079533
>Lots of ways here. For whole genomes, is basically a lot of random sequencing all over the genome, followed by finding overlapping regions and assembling it into a whole genome.
Doesn't explain how actual sequencing is done.

>I'm not entirely sure what you mean by this
He probably means how to synthesize a gene in vitro or something.
>Enzymes are used to cut the DNA unequally, leading to short single strands being present. If the gene you want to insert has been cut by the same enzyme, it will attach to the single strands, and insert.
Wat. You use restriction enzymes for putting genes into plasmids.
For genomic integration you need more than this.
>DNA is seperated into to single strands, primers bind to the complimentary site
You need to lower the temperature after denaturation to allow primer annealing.

Seems like you could use a bit more background knowledge yourself brot ;)

velleman here

cheap and german quality (actually made in china)

I use the one that works

>>8079509
cheap one.
save your money for a nice oscope

>>8079179
"degenerate HOMOs" is a legit chemistry term

>>8079179
Antibondage

>>8079179
My favorite is neopentane.

Also: https://en.wikipedia.org/wiki/List_of_chemical_compounds_with_unusual_names

If there's a really cool Moon, I'll go look at it with binoculars.

I didn't summon the Moon - I'm not the independent variable. The Moon's position is the independent variable - I simply reacted to it making me the dependent variable.

>>8079157
Go outside
Look at the moon
Take a potato
Hold it at arms length
>The gravitationall pull on your head from the potato is greater than the pull from the moon.

So you're saying I can jump higher during the day than at night?