The h Bar

12:07 AM

@Natecat It's not clear what you mean - energy or work is the integral of force times displacement, so it has units of newton-meter. What's unclear about that?

alarge

@BernardoMeurer What was the last time again?

vzn

@alarge not auspicious signs in this area scientificamerican.com/article/…

DanielSank

@ACuriousMind energy doesn't have any particular units.

ACuriousMind

@DanielSank Energy clearly has units of energy :P What do you mean?

DanielSank

Dimensions, not units.

vzn

12:20 AM

Nov 4 at 3:30, by Bernard Meurer

Man do I miss Swartz

DanielSank

They're not the same thing, and being sloppy about the difference confuses the crap out of people.

ACuriousMind

@DanielSank I agree that there is a distinction between dimensions and units, but I don't see where I consfused the two. Saying "X has units of X" may be tautological, but it is not false.

Bernardo Meurer

@alarge Last time I said you had "@alarge dick" and got banned because people though I was calling you a dick

While in fact is was quite the opposite

DanielSank

"has units of energy" is nonsense.

Energy is not a unit.

Bernardo Meurer

Isn't a unit of energy a quanta?

DanielSank

12:23 AM

>:(

Bernardo Meurer

Lol, okay, I'll just burn what I got from this chem class

alarge

@vzn Tech and attitudes move quickly. Also it helps that she doesn't live in the states.

DanielSank

@BernardoMeurer probably a good idea anyway.

alarge

@BernardoMeurer I didn't realize you got banned

Bernardo Meurer

@alarge autobanned for 30 mins IIRC

ACuriousMind

12:31 AM

@DanielSank But in each unit system, energy has a particular unit. I really don't see what you're upset about

Natecat

@ACuriousMind As in if a joule (newton-meter) is the energy required to apply a force of one newton over one meter, wouldn't it require more energy to apply 1 newton of force to move an object one meter if the object was more massive? Because the acceleration would be lower so the force of one newton would be applied for longer

Bernardo Meurer

@ACuriousMind He's just being a drama queen

 void function_which_allocates(void) {
     /* allocate an array of 45 floats */
     float *a = malloc(sizeof(float) * 45);

     /* additional code making use of 'a' */

     /* return to main, having forgotten to free the memory we malloc'd */
     return;
 }

 int main(void) {
     while(1)
     {
     function_which_allocates();
     /* the pointer 'a' no longer exists, and therefore cannot be freed,
      *      but the memory is still allocated. a leak has occurred. */
     }
 }

If anyone wants to have fun run that!

It's super fun!

ACuriousMind

@Natecat Yes, of course. One Joule of work corresponds to a force of one Newton applied to an object of one kilogram over one meter, and it also corresponds to a force of one Newton applied to an object of two kilogram over one half of a meter.

DanielSank

@ACuriousMind I'm sick of the way you use pillow punching defence in discussions. I decline to continue this discussion. Willing to talk about something else.

Bernardo Meurer

@DanielSank What's pillow punching?

Natecat

12:36 AM

Oh

Why isn't there a unit of kilograms in there then

ACuriousMind

@Natecat In where?

Natecat

in N*m as a unit of force

ACuriousMind

@Natecat The Newton does contain a kg - recall that $1 \mathrm{ N} = 1\, \frac{\mathrm{kg}\mathrm{m}}{\mathrm{s}^2}$.

Natecat

That's weird that mathjax isn't working

ACuriousMind

@Natecat Look in the upper right corner of the chatroom and follow the instructions

Natecat

12:42 AM

but yeah, but by your explanation the quantity of newtons stays constant

therefore the thing thats changing is the acceleration, $\frac{m}{s^2}$

or yeah what I said wasn't what I meant

lemme figure out how to say it

Okay that makes sense

ACuriousMind

@Natecat Yes, the acceleration is changing. In my second case, by $F=ma$, it's only half of the acceleration in the first case.

I doubled the mass but kept the force constant to 1 Newton, so the acceleration is halved

Natecat

Oh

wait so my question still stands then

since the acceleration is lower, wouldn't the force be applied for longer?

And at least intuitively to me, the same force for a longer duration requires more energy

ACuriousMind

@Natecat Yes, the same force for a longer duration does require more energy (unless the force is orthogonal to the path taken), what's the problem with that?

Natecat

oh wait

I didn't account for the change in displacement

I'm silly

DanielSank

@BernardoMeurer imagine you're in a boxing match and your opponent holds up a pillow. It makes your punches useless, but it also adds nothing.

@ACuriousMind for what it's worth, I perceive that to be your modus operandi when you think someone is wrong about something.

Bernardo Meurer

12:51 AM

@DanielSank I see. Kick him in his ~~nuts~~ RAM sticks

DanielSank

1:06 AM