Search found 376 matches

by asad137
Mon Nov 30, 2009 1:48 am UTC
Forum: Science
Topic: Is a good knowledge of chemistry useful for physicists?
Replies: 25
Views: 2717

Re: Is a good knowledge of chemistry useful for physicists?

I never took a chemistry course as a physics major in college. I currently am working as a postdoc doing experimental/observational cosmology. Might be different for different subfields, but for me, I've never needed chemistry.

Asad
by asad137
Mon Nov 16, 2009 2:26 am UTC
Forum: Science
Topic: Astronomy Grad School
Replies: 30
Views: 3308

Re: Astronomy Grad School

Korandder wrote:Berkley


Protip: don't spell it "Berkley" in your application's statement of purpose.

Asad
by asad137
Mon Nov 02, 2009 4:14 am UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 6677

Re: Long distance Cycling

lol... I wen't on my first proper cycle trip at the weekend - 20k. Still a way to go before I reach the likes of you lot, eh? :) Surprisingly...no. If someone had told me 3 months ago that I'd be able to ride ~150km, I would have laughed in their face. But...here I am, having done it. Before I got ...
by asad137
Sun Oct 25, 2009 9:01 pm UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 6677

Re: Long distance Cycling

Good luck! I haven't done any sort of competitive riding, but last weekend I rode 92 miles (148km) on gently rolling terrain. It was awesome.

Asad
by asad137
Sun Oct 25, 2009 8:58 pm UTC
Forum: Science
Topic: Misbehaving thermocouple?
Replies: 12
Views: 1440

Re: Misbehaving thermocouple?

My guess is even if the probe is designed to be useful at temperatures that low, the meter isn't. More than likely the meter uses a simple linear model for converting voltage to temperature which is reasonably accurate at non-cryogenic temperatures but doesn't work well at 77K. Typically one uses si...
by asad137
Wed Sep 30, 2009 2:51 am UTC
Forum: General
Topic: ITT: We make xkcd slightly worse.
Replies: 8641
Views: 1603969

Re: ITT: We make xkcd slightly worse.

pseudoidiot wrote:Your mom is one of the oldest ways to insult someone in a patrilineal society.


This is one of the best things I've read on these forums in weeks. Well done, sir, well done.

Asad
by asad137
Sat Sep 19, 2009 2:05 pm UTC
Forum: General
Topic: Cars are full of science.
Replies: 59
Views: 3557

Re: Cars are full of science.

In the real world you don't want a BOV or wastegate You don't need a BOV. You NEED a wastegate. The wastegate is the valve that diverts exhaust gases around the turbine to control boost. Also, lots of cars with mass-airflow-based engine management run BOV's but recirculate them back into the intake...
by asad137
Sat Sep 19, 2009 1:51 am UTC
Forum: General
Topic: Cars are full of science.
Replies: 59
Views: 3557

Re: Cars are full of science.

But yeah, they're both useful for different reasons. Except centrifugal superchargers. I'll never understand adding something with all the negatives of both super- and turbochargers. +a million. Turbos FTW. Who needs torque at 1200 RPM anyway? If you need to go fast, downshift into the proper RPM r...
by asad137
Thu Sep 17, 2009 1:00 pm UTC
Forum: Science
Topic: You might be a physics major if...
Replies: 540
Views: 57299

Re: You might be a physics major if...

I'm a physicist and I have never played D&D. I'd wager the same is true of most of my physicist friends/colleagues.

Asad
by asad137
Fri Sep 11, 2009 2:47 am UTC
Forum: Science
Topic: LaTeX and other markup!
Replies: 30
Views: 18350

Re: LaTeX programs

I run TexNicCenter (also freeware) on my work PC which has worked well for me. I wrote my entire PhD thesis using it. A lot of people I know use TexMaker, though, and like it.

Asad
by asad137
Tue Sep 08, 2009 4:58 am UTC
Forum: Science
Topic: Resistor problem that appeared in comic
Replies: 4
Views: 1359

Re: Resistor problem that appeared in comic

Nerd sniping

Asad
by asad137
Tue Sep 08, 2009 12:23 am UTC
Forum: Fit Club
Topic: science tips for losing weight and geting uber fit
Replies: 15
Views: 2909

Re: science tips for losing weight and geting uber fit

I've recently started trying to eat carbs within 30mins of finishing a session and I've started to feel much better the next day. What were you doing before? Eating nothing post-workout or eating something besides carbs? I would think that you should eat protein after a workout so that your body ha...
by asad137
Tue Sep 08, 2009 12:22 am UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 6677

Re: Long distance Cycling

Solid! Well done. The knee pain is most likely because you're not used to it, but be aware that seat position (not just height but also fore-aft position) can put undue stress on the knees if not set correctly. If you keep it up and you still have knee pain, you may want to invest in a bike fitting ...
by asad137
Mon Sep 07, 2009 1:45 pm UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 6677

Re: Long distance Cycling

akashra wrote:A starting point is 0.78x your inseam length...


Measured from the center of the bottom bracket, not the ground.

Asad
by asad137
Mon Sep 07, 2009 6:54 am UTC
Forum: Fit Club
Topic: science tips for losing weight and geting uber fit
Replies: 15
Views: 2909

Re: science tips for losing weight and geting uber fit

I've recently started trying to eat carbs within 30mins of finishing a session and I've started to feel much better the next day. What were you doing before? Eating nothing post-workout or eating something besides carbs? I would think that you should eat protein after a workout so that your body ha...
by asad137
Sun Sep 06, 2009 3:11 am UTC
Forum: Fit Club
Topic: science tips for losing weight and geting uber fit
Replies: 15
Views: 2909

Re: science tips for losing weight and geting uber fit

I could be wrong but I am fairly certain fat loss is evenly distributed so it might prove difficult for you to spot-target your stomach area might prove difficult. Indeed. You can't control where you put fat on, and you can't control where it comes off. In order to get rid of belly fat you have to ...
by asad137
Sat Sep 05, 2009 9:05 pm UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 6677

Re: Long distance Cycling

Any experience on how fatigue builds up when you're doing endurance cycling? It is sudden or gradual; will I know when I have 10 miles left to ride, so I can point at the nearest train station? For me, the longest I've ever ridden in one sitting is about 33 miles (yay bike computer), though the rid...
by asad137
Sat Sep 05, 2009 6:26 pm UTC
Forum: Science
Topic: Why did the same song sound different on two radio stations?
Replies: 11
Views: 1319

Re: Why did the same song sound different on two radio stations?

It's most likely that the two stations simply EQ their audio differently. There's no "radio" reason why they would sound different if it's the exact same signal being broadcast; ergo, they must be broadcasting different signals.

Asad
by asad137
Sat Sep 05, 2009 1:43 pm UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 6677

Re: Long distance Cycling

Oh, and I just went and checked my bike. The top surface of my seat is about an inch below my belly button -- pretty far from crotch height. Remember that you don't need to be able to put your feet on the ground while you're in the seat.

Asad
by asad137
Sat Sep 05, 2009 1:23 pm UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 6677

Re: Long distance Cycling

Yeah, seat should be at crotch height when standing, right? Saddle height is set solely by achieving nearly-maximal leg extension without having your hips rock while you pedal. Using a simple rule like you describe may get you close, but you can't really effectively set the seat height without actu...
by asad137
Sat Sep 05, 2009 1:18 pm UTC
Forum: Science
Topic: Magnetic Dipoles in the LHC
Replies: 1
Views: 383

Re: Magnetic Dipoles in the LHC

That B-field in the solenoid is correctly drawn, and yes you're right that if the wires were coiled around the tube it just wouldn't work at all. Remember that the force on a charged particle in a magnetic field is proportional to the cross product of v and B , so in order to get it to turn around i...
by asad137
Fri Sep 04, 2009 3:35 am UTC
Forum: Food
Topic: Alfredo sauce: What did I do wrong?
Replies: 8
Views: 2212

Re: Alfredo sauce: What did I do wrong?

Axman wrote:Starting with a roux is called a bechamel and is not at all similar, but not bad. Think of it as cheese gravy.


Once you add the cheese, it's actually a mornay ;)

Asad
by asad137
Fri Sep 04, 2009 3:33 am UTC
Forum: Fit Club
Topic: Muscle cramping and how to prevent it?
Replies: 6
Views: 1456

Re: Muscle cramping and how to prevent it?

Update: I went on more-or-less the same ride today, and this time it was a smaller group and an even faster pace. I had almost no problems with muscle cramping (I felt a tiny twinge of tightness about 2/3 of the way in, compared to feeling it about 1/4 of the way in last time and then having my legs...
by asad137
Fri Sep 04, 2009 3:22 am UTC
Forum: Science
Topic: Particle Physics vs. Nuclear Physics
Replies: 2
Views: 839

Re: Particle Physics vs. Nuclear Physics

I think you just need to take more classes and you'll be able to sort it out for yourself. Expecting to know, as a freshman in college, which subfield of physics to focus on is, frankly, a little ridiculous. Your first 2, 2.5 years are going to be spent taking the basics anyway (intro level mechanic...
by asad137
Wed Sep 02, 2009 12:07 am UTC
Forum: Science
Topic: Nitrogen vs air
Replies: 21
Views: 3049

Re: Nitrogen vs air

It's not just Citroën -- I would bet that most "gas-charged" shock absorbers use nitrogen. My guess (I know, I know, it's not a direct citation) is exactly what you surmise -- it's dry, and it's cheap.

Asad
by asad137
Sun Aug 30, 2009 5:16 am UTC
Forum: Food
Topic: Alfredo sauce: What did I do wrong?
Replies: 8
Views: 2212

Re: Alfredo sauce: What did I do wrong?

Anyway, is it possible to make the sauce with something other than heavy cream? Even whole milk would be more reasonable. The flavor was excellent, but the sauce left almost a greasy feel in my mouth. If you to keep a somewhat thick consistency, you can always start with a roux...You can then use s...
by asad137
Sun Aug 30, 2009 5:12 am UTC
Forum: Fit Club
Topic: Muscle cramping and how to prevent it?
Replies: 6
Views: 1456

Re: Muscle cramping and how to prevent it?

Are you not used to this level of exertion, especially for such a long duration/distance? I am definitely not. Most of the athletic activities I do are more focused on short bursts of power with relatively low effort between (things like Ultimate and basketball), not sustained moderate/high output....
by asad137
Sun Aug 30, 2009 5:06 am UTC
Forum: Science
Topic: What Parts of Math Help With Physics?
Replies: 13
Views: 1355

Re: What Parts of Math Help With Physics?

It really depends what kind of physics you want to do. Obviously, the things mentioned above will be important for you to pass your physics classes . But to actually do physics ...that's a different story. I'm an experimental physicist, and I rarely (RARELY) need to use anything more advanced than t...
by asad137
Sat Aug 29, 2009 6:05 pm UTC
Forum: Fit Club
Topic: Muscle cramping and how to prevent it?
Replies: 6
Views: 1456

Muscle cramping and how to prevent it?

Earlier this week I got a new bike and on Thursday I went for my first road group ride. 11 other riders on various roads and trails in the twin cities area, about 30 miles total. It was a lot of fun, but it would have been more fun had my legs (calves specifically) not started cramping up about 40 m...
by asad137
Wed Aug 19, 2009 5:31 pm UTC
Forum: Food
Topic: Kitchen equipment
Replies: 13
Views: 2458

Re: Kitchen equipment

PictureSarah wrote:An aebleskiver pan. I want an aebleskiver pan.


If you're in NorCal and ever go down to the Santa Barbara area, you can buy them in Solvang.

Of course, you could probably get them online too.

Asad
by asad137
Fri Jul 24, 2009 12:42 am UTC
Forum: Science
Topic: You might be a physics major if...
Replies: 540
Views: 57299

Re: You might be a physics major if...

Salviati wrote:
You see someone say "QFT", and you ask yourself: "What does this have to do with Quantum Field Theory?"


This.

Every. Single. Time.

Asad
by asad137
Fri Jul 17, 2009 12:50 pm UTC
Forum: Food
Topic: Real Squeeze Bacon
Replies: 8
Views: 1751

Re: Real Squeeze Bacon

quintopia wrote:um, isn't that just a simplified version of baconnaise?


As I understand it, baconnaise is mayo with bacon flavor. This is on a whole different level -- it's mostly bacon with a little bit of mayo to hold it together.

Asad
by asad137
Fri Jul 17, 2009 12:48 pm UTC
Forum: Science
Topic: Photon exchange puzzle :D
Replies: 18
Views: 1715

Re: Photon exchange puzzle :D

ian wrote:The question only works for point particles. Neither electrons or photons are, so it doesn't apply


Buh...buh...wha??!? Last time I checked, both electrons and photons were considered point particles by everyone but string theorists.

Asad
by asad137
Thu Jul 16, 2009 10:12 pm UTC
Forum: General
Topic: ITT: We make xkcd slightly worse.
Replies: 8641
Views: 1603969

Re: ITT: We make xkcd slightly worse.

Blinke wrote:Sources: 483 and 77.
Spoiler:
google_earth.JPG


Win. Best one I've seen in a long time.

Asad
by asad137
Sat Jul 11, 2009 1:27 am UTC
Forum: Science
Topic: Does the width of a superconducting wire matter?
Replies: 15
Views: 2356

Re: Does the width of a superconducting wire matter?

Meteorswarm wrote:Would a hollow wire (roughly) double the capacity, not affect it, or lower it?


Lower it.

There is a critical current density. If you have a fixed current going through a wire and you remove some of the cross sectional area, the current density goes up.

Asad
by asad137
Mon Jun 29, 2009 4:20 pm UTC
Forum: General
Topic: ITT: We make xkcd slightly worse.
Replies: 8641
Views: 1603969

Re: ITT: We make xkcd slightly worse.

operator[] wrote:Also notable is that I found out yesterday that there was a 6th Hitch-Hiker's Guide book named The Salmon of Doubt.


Salmon of Doubt, IIRC, isn't a Hitchhiker's book, it's part of the Dirk Gently series. Not everything Douglas Adams did was related to the Hitchhiker's Guide.

Asad
by asad137
Wed Jun 24, 2009 5:04 pm UTC
Forum: Science
Topic: You might be a physics major if...
Replies: 540
Views: 57299

Re: You might be a physics major if...

I think the key difference is that undergrads will tend to think of "a linear combination of states" as a mathematical statement and "a superposition of quantum states" as a physical statement. The difference isn't in content but in context. Which is why they are the same to a t...
by asad137
Wed Jun 24, 2009 1:14 am UTC
Forum: Science
Topic: You might be a physics major if...
Replies: 540
Views: 57299

Re: You might be a physics major if...

A while back, a friend pointed out how damaged I've gotten from physics. I had a cup of coffee that was too warm. So I started putting cutlery into the cup. My friend asked me what the heck I was doing, and I said I was increasing the thermal conductivity of the system by adding heat sinks. He poin...
by asad137
Tue Jun 23, 2009 4:53 am UTC
Forum: General
Topic: That's a sweet ass-car! Post your xkcd-mobile
Replies: 102
Views: 20687

Re: That's a sweet ass-car! Post your xkcd-mobile

scrovak wrote:Asad, where's that at, the salt plains?


U.S. 50 I-80 somewhere in Nevada. Straight, flat, visibility for 50 miles in every direction.

Asad
by asad137
Tue Jun 23, 2009 3:07 am UTC
Forum: General
Topic: That's a sweet ass-car! Post your xkcd-mobile
Replies: 102
Views: 20687

Re: That's a sweet ass-car! Post your xkcd-mobile

My car:

Spoiler:
DSCN1218.jpg
DSCN1218.jpg (111.8 KiB) Viewed 3351 times
DSCN1212.jpg
DSCN1212.jpg (123.82 KiB) Viewed 3351 times


1992 240SX SE, turbocharged by me.

Also, don't try this at home, kids:
Spoiler:
speed2.jpg
speed2.jpg (57.69 KiB) Viewed 3348 times


Asad

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