Friday
August 29, 2014

Posts by Ren


Total # Posts: 46

Chemistry
What is the normal boiling point in ∘ C ^\circ {\rm C} of a solution prepared by dissolving 1.50 g {\rm g} of aspirin (acetylsalicylic acid, C 9 H 8 O 4 {\rm C}_{9}{\rm H}_{8}{\rm O}_{4}) in 75.00 g {\rm g} of chloroform (CHCl 3 ) ({\rm CHCl}_{3})? The normal boiling ...
February 4, 2014

Math
if you know the lcm of 4 and 5, how could you find the lcm of 40 and 50
December 17, 2013

Reading
Can I please get a personification in the poem daffodils by William Wordsworth
October 26, 2013

physics
A meteoroid is speeding through the atmosphere, traveling east at 24.5 km/s while descending at 11.6 km/s. What is its speed, in km/s?
September 18, 2013

chemistry
How many grams of NaOH would be needed to react with 199 g of HCl? NaOH + HCl --> NaCl + H2O
July 15, 2013

chem
What mass of KCl in grams is formed when 2.00 lbs of KC103 is decomposed? KClO3 --> KCl + O2
July 15, 2013

College Chemistry
Calculate activities of Ca2+ and F- and the solubility of fluorite (CaF2) in pure water at 25C without regard to possible hydrolysis. Assume that all activity coefficients are equal to one. Express the solubility of fluorite in terms of mol/L and g/L.
March 13, 2013

English
It's A
March 13, 2013

History
D) sent to american ""concentration-like" camps
January 24, 2013

Spanish (please help)
yo hago ellos hacen nosotros hacemos
January 24, 2013

art
1.personification 2. allusion 3. objective 4. logo 5. calligraphy 6. contour drawing 7. illuminated manuscripts?? 8. Barbara Kruger 9. graphic design 10. adding text
January 23, 2013

spanish
Mi maestra favorita se llama _____ y la clase que ella enseña es_____. just fill in the blank with a your fav teachers name and subject she teaches
January 22, 2013

Spanish.
El caballo fue importante para los conquistadores Hernán Cortes conquisto el imperio azteca El conquistador de Peru fue francisco Pizarro
January 16, 2013

spanish III
1. Son ___nuestras____ tijeras : it is nuestras because the scissors are feminine and so the ours has to be female 2. Nuestros : very close you just have to change the nosotros to nuestros since it is "our" cats not "we" cats 3. "su" is correct :...
December 15, 2012

Calculus(Urgent help)
f(x)=x^3-3x^2+3x+1 near 2 (at a=2) A. Use Linear approximation to approximate. b.is this underestimate or overestimate? Justify answer. C.Approximate f(2.25) using the linear approximation and compare the answer with the exact value. Thanks.
November 7, 2012

usm
A volume of 10.0 of a 0.190 solution is titrated with 0.770. Calculate the volume of required to reach the equivalence point.
October 29, 2012

Calculus (Urgent Help)
The graph of y=cos x * ln cos^2x has seven horizontal tangent lines on the interval [0,2pi]. Find the x-coordinate of all points at which these tangent lines occur.
October 25, 2012

genetics
Also, how would this affect the connection of DNA and the histones?
October 14, 2012

genetics
What kinds of amino acids on histone tails are able to be phosphorylated and why?
October 14, 2012

physics
a carnival ride is made so that at a certain point the floor can be lowered and the people inside dont fall. if this carnival ride has 2.0 m radius and rotates 1.1 times per second: a) find the speed of the ride. B) find the centripetal acceleration of a rider C) what produces...
April 6, 2012

Spanish
i dont get it
March 25, 2012

Spanish
Fill in the blank. 1. Los amigos están viajando por un país europeo. Los amigos están viajando por _____________________. 2. Están haciendo un viaje que no cuesta mucho. Están haciendo un viaje _______________. 3. Lo están pasando muy ...
March 25, 2012

spanish
Yo me lavo ______ manos y ______ cara. yo cepillo los dientes y yo cepillo me pelo. Yo me pongo ______ ropa
March 25, 2012

physics
10.07km
August 30, 2011

7th grade
The economic theory that the prosperity of a nation depends upon its supply of capital, and that the volume of the world economy and international trade is unchangeable.
October 16, 2010

Algebra 2
can someone show me how to do it step by step please! Use a graph and table to solve each system. check your answer {y+x=5 {3x-5y=-1
October 16, 2010

math
yes it looks right to me Because all you needed to do is to plug in the value 39cm for x and calculate the answer, so u are correct.
March 25, 2010

Math - Implict differentiation
How do I find the value of d^2y/dx^2 for the function defined implicitly by xy^2 + y = 2 at the point (1,-2)?
March 25, 2010

Computer Science
What are two dimensional arrays and can they be seen anytime as a one dimensional array?
March 16, 2010

Math
Differentiate in terms of x: 1] y = cos^3 5x 2] y = sec^2 3x
March 11, 2010

Rhetoric Writing
Hey I am doing a Process Analysis assignment. I chose "How a magician saws a woman in half" I need some help in finding information for this topic as it relates to the stages and steps taken in doing this magic. Also i will like to find some visual of how the magic ...
February 19, 2010

math
Somtething seems to be wrong with this question to me. This is what i got:[substitution method] y+2x=3 (1) y+2x=-4 (2) from equation (2)y+2x+-4 => y=-4+2x call this equation (3) substitute equation (3) in equation (1) -4+2x+2x=3 4x=7 x=7/4 for x =7/4, substitute x in ...
February 17, 2010

math
ok here is what i got: 8x+5y=184 (1) x-y=3 (2) from equation (1) 8x+5y=184 => 8x=184-5y x=184-5y/8 call this equation (3) substitute equation (3) in equation (2) 184-5y/8-y =3 (184/8)-(5y/8)-y=3 (184/8)-(13y/8)=3 (184/8)-3=13y/8 160/8=13y/8 20=13y/8 [cross multiply] 20(8)=...
February 17, 2010

algebra
This is the substitution method y-2x=8 (1) 2y+x=1 (2) From equation (1) y-2x=8 would now be y=8+2x you can call this equation (3) so now, we substitute equation (3) in equation (2) 2(8+2x)+x=1 16+4x+x=1 16+5x=1 5x=1-16 5x=-15 x=-15/5 x=-3 for x=-3, substitute it in equation (3...
February 17, 2010

susbstitution method
Well these would be two equation so: y=6-x (1) y=x+2 (2) so, substitute equation (1) y=6-x into equation (2) therefore, 6-x=x+2 6-2=x+x 4=2x 4/2=x 2=x for x=2, substitute x in equation (1) y=6-2 y=4 x=2 , y=4
February 17, 2010

Maths (limits)
how do i evaluated these limits: lim x --> 3 ((square root of x^2 +16)- 5)/(x^2 - 3x) lim x--> to infinity (2+ 100/x)
February 17, 2010

arithmetic
oh don't worry drwls, i now understand. thanks!
February 17, 2010

arithmetic
sorry i mean the top looks like a quadratic do i break it down or just leave it as it is and just plug in x=5 into the entire equation?
February 17, 2010

arithmetic
so drwls do i have to change the top into something similar or just plug in x=5 into the entire equation.
February 17, 2010

arithmetic
ok lemme write it over then: How do i find the lim x-->5 (x-3-2x^2)/(1+3x)
February 17, 2010

arithmetic
how do i evaluate this limit: lim x tends to 5 x-3-2x^2/1+3x
February 17, 2010

arithmetic
Hey thanks a lot Reiny. I got it..
February 11, 2010

arithmetic
How do i find the common ratio, when the 1st, 2nd and 7th terms of a A.P with common difference 2 are the first three terms of a G.P .
February 11, 2010

math
22...quotient of 18 and 2 = 9 sum of 22 and 9= 31...sbtracting the quotient (which is 9) from the sum..would equal 9.
January 28, 2010

science
A 50 kg skier is pulled up a frictionless ski slope that makes an angle of 8 degrees with the horizontal by holding onto a tow rope that moves parallel to the slope. Determine the magnitude of the force of the rope on the skier at an instant when a) the rope is moving with a ...
November 12, 2006

Science
A car weights 1.30 X 10^4 N is initially moving at a speed of 40km/h when the brakes are applied and the car is brought to a stop in 15m. Assuming that the force that srops the car is constant. find a)magnitude of the force b)time required for the change in speed. If the ...
November 12, 2006

Pages: 1

Search
Members