Monday

April 21, 2014

April 21, 2014

Total # Posts: 16

**Physics**

A 2.50- object is moving along the axis at 1.60 . As it passes the origin, two forces and are applied, both in the direction (plus or minus); .The forces are applied for 3.00 , after which the object is at the point , . What is F2?

**physics**

Vector V(with an arrow at the top) represents a displacement of 120. at 29.0 counterclockwise from the x axis. Write unit in Vector notation... Help!

**Calculus 1 Related Rates**

Thank you so much Reiny you rock! I was putting that .406 in for V but i did have 620 with the 33.0^-1/2. Thanks you Rock!!!!!

**Calculus 1 Related Rates**

Water is discharged from a pipeline at a velocity v(in ft/sec) given by v=1240p^(1/2), where p is the pressure (in psi). I f the water pressure is changing at a rate of 0.406 psi/sec, find the acceleration(dv/dt) of the water when p=33.0 psi. I know the answer is suppose to be...

**Calculus 1 Implicit differentiation**

Help please help me understand what i am doing wrong in this problem! x^3+3x^2y+y^3=8 find dy/dx using implict differentiation. The answer is x^2+2xy -------- but i keep getting x^2y x^2+y^2 ----- x^2+y^2

**Chemistry/Math**

So if i were asked for grams of Hydrogen per day? it would be 1 mole H20 X 2 grams of H/1 mole H20

**Chemistry/Math**

I think so could you critique this? 1. I came up with 1000grams of H20 2. 1 mole H20 X 6.022X10^23/1 mole H20=6.0222X10^23 Molecules Oxygen 3. 1 mole H20 x 1 atom of oxygen/1 mole H20= 1 atom of Oxygen Is this correct I really am trying to learn and understand this so that I c...

**Chemistry/Math**

If a doctor tells you to drink 1 liter of water per day, answer the following questions(assuming the density of water to be 1g/mL): 1. The number of grams of water per day? 2.The number of molecules of oxygen per day? 3. The number of atoms of oxygen per day? Please show how y...

**College Chemistry**

thanks so in any other question i can still use to as my base number raised to whatever half life is provided?

**College Chemistry**

For a certain first-order reaction the rate constan is 2.9 s-1. what is the fraction of the reactant remaining after 4 half lives?

**College Chemistry**

i still dont get it. (H+)=x/0.050M

**College Chemistry**

what is the approximate pH of a solution labeled 0.050 M HClO? I realized my mistake on my last post but this isnt a strong acid nor a strong base so how do i solve this?

**College Chemistry**

4.2 thank you so much do u have time for another one?

**College Chemistry**

What is the approximate pH of a solution labeled 6 x 10^-5 M HBr?

**college Chemistry**

0.0124/121.64= 1.02 x 10^-4g/mol 1.02 x 10^-4/ .5= 2.04 x 10^-4 2.04 x 10^-4*2=4.08x 10^-4 -log(4.08 x 10^-4)= 3.39 14-3.39=10.61 thank you so much!!!!!!

**college Chemistry**

What is thhe pH of 500mL of solution containing 0.0124 grams of Ca(OH)2?

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