Recent content by atOnz

What is the most common chemical method for removing H_30^+ ions in aqueous solution? Write a net ionic equation which describes this method.

I didn't think they spent so much time in the lab as that website says. Good to know though.

Haha alright. I'd normally follow your "obsessive-compulsive, anal-retentive teacher" advice but this is the first set of work I've passed into him, and he has yet to say what he preferrs. It's not that I can't do the work, it's that I hate not knowing if I'm right or wrong or even in the same...

Fair enough, the least I can do is try it. Basically I will find the heat required to bring the lead to it's melting point using q = mc(delta)t. So, q = (100g)(0.159/J/g°C)(328°C-25°C)... q = 4.8x10^3 J. After finding that out I need to find the energy required to actually melt the lead and...

I'm just curious about what type of sciences I would need to be an archaeologist. I love history/english which are my strong points academically and I'm not really a fan of the sciences/maths but I am still curious what I might need.

The specific heat capacity of solid lead is 0.159J/g°C, the molar enthalpy of fusion is 5.0kJ/mol, and the melting point of lead is 328°C. Calculate the total energy required to change 100g of lead at 25°C to molten lead at it's melting point. I don't even know where to start, I know...

How would I go about determining the specific heat of a metal (like Sodium) that reacts with water?

Oh my, sorry for that! I meant P=Fv. Thank you for your help!

So I researched that this train can get up to at most 56km/h (15.5m/s). I guess the easiest thing to do is assume it's constant because well, to do otherwise might be out of my current level of physics education :P. 2, 387, 200W = F(15.5m/s) F=154013N So superman has to overcome Fgx (1003673N)...

I need to prove how Superman would 'be more powerful than a locomotive.' http://img221.imageshack.us/img221/5408/diagram8gm.th.jpg From my diagram I need to find out how much power Superman has to put out to be able to pull that train up the track. I know he has to pull the train 8.5m on...

thx Well thanks for the ideas! Especially the superhero one, I started working on it today. Got a book called the Physics of Superheroes from my local book store which is a good reference. Basically I'm going to analyze some of Superman's powers (originally, before flying) and the tension in...

I'm in Grade 11 taking my first course ever in physics (physics 11 :P). My teacher recently assigned a project. For this project I basically have to analyze the motion of an object with regard to displacement, velocity, work, force, power and energy either generated or put into the object. So...

Sorry for sort of the redone work but I wanted to make it clearer for myself and people reading. Work = (mass)(gravity)(distance) Work = (59.9kg)(9.81m/s^2)(2.55m) Work = 1488.42 J Power = 1488.42 J / 2.94s Power = 506.27W 506.27W are put out over 2.94 seconds. So I need to see how...

After taking the advice from some other people I had to change kW to kWh. After finding that number I multiplied them by however many hours were worked to give my how much money the company made. I got much higher numbers than 5$.

So after that I just multiply my 1822.57 kWh by $0.0922 (# of hours), correct? 1822.57 (0.0922) = $168.04 for one hour of work. 1822.57 (0.0922)(40) = 6721,64 for 40 hours of work 1822.57 (0.0922)(1920) = 322638.63 for 48-40hour work weeks. Correct?