/sci/ - Science & Math

>>11737888

>>10085156
>I just hope the NPC meme is a good way to use peer pressure to make people reflect on their own predictability, which goes hand in hand with manipulability. “I don’t blindly follow trends. I know, because I follow the NPC trend.” It’s peer pressure turned against itself.
WAKE UP SHEEPLE!!!

>>9178535
>college-grade algebra
>quadratic equations

saw this thing in my friends math book and ive been struggeling since, can you solve it /sci/
Write this in the form of a+bi
1/2+3i

GO!

Hey Sci, could you please help me whit a math problem.
The problem goes as follows; Out of the students in a class 60% are mango lovers, 70% are salsa lovers and 40% fall into both categories.
Determine the probability that a randomly selected student is neighter a mango nor salsa lover.
Its probably really easy and im too stupid to solve it.

>>3761205
Que?

/sci/ please tell me my IQ from this opening post.

Sincerely, Herpus Derpus

Question:
A silicon crystal is known to contain 10^-4 atomic percent of arsenic as an impurity. It then receives a uniform doping of 3*10^16 cm-3 phosphorus atoms and a subsequent uniform doping of 10^18 cm-3 boron atoms. A thermal annealing treatment then completely activates all impurities.

A. What is the conductivity type of this silicon sample?

Solution:
Arsenic is a group V impurity, and acts as a donor. Because silicon has 5*10^22 atoms cm-3, 10^-4 atomic percent implies that the silicon is doped to a concentration of (5*10^22) * (10^-6) = 5*10^16 Arsenic atoms cm-3

blah blah blah it's p-type semiconductor

WHERE DID THE 10^-6 FUCKING COME FROM?! Please help this EE fag.

>>1884370

>Why the fuck are intelligent woman SO hard to find?
>are intelligent woman
>woman
>plural

>mfw

Maybe these intelligent women tend to avoid hipster faggots like OP.

>>1805139


O.O