Sunday
April 20, 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 poi...

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

Reading
Can I please get a personification in the poem daffodils by William Wordsworth

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?

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

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

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.

English
It's A

History
D) sent to american ""concentration-like" camps

Spanish (please help)
yo hago ellos hacen nosotros hacemos

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

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

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

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 :a...

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.

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.

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.

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

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

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...

Spanish
i dont get it

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 ...

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

physics
10.07km

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.

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

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.

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)?

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

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

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 i...

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 equati...

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)=1...

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...

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

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)

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

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?

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

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

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

arithmetic
Hey thanks a lot Reiny. I got it..

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 .

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.

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 c...

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 inita...

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