Tuesday

January 27, 2015

January 27, 2015

Total # Posts: 221

**Science**

How long does desalination of ocean water to fresh water take?
*September 7, 2008*

**Biochemistry: Thermodynamic measurements **

Thermodynamic measurements in water reveal that the bidingin fo a Zinc Finger to target RNA has a delta H note of -7.2 kcal/mol and a delta S note of 12 cal/ mol K. What is the equilibium constant for the binding reaction at 25 degrees C?
*August 28, 2008*

**Science-Ecology**

State at least two advantages and two disadvantages of a pesticide that is low in toxicity and breaks down quickly. Thanks!
*January 21, 2008*

**Science-Ecology**

Why are amphibians good indicators of a health of an ecosystem?
*January 21, 2008*

**Science-Ecology**

Why are food chains typically limited to 4 or 5 trophic levels?
*January 21, 2008*

**the remainder theorem - Please Help!!**

i'm really not sure how to do this question. (3x+2k)^3+(4x-7)^2 has a remainder of 33 when divided by x-3. find k. i tried to expand the expression, but i don't get a polynomial, so how do i apply the remainder theorem? i would really appreciate it if anyone could tell...
*January 14, 2008*

**problems faced in conserving kalimantan rainforest**

thanks for all the help!
*December 23, 2007*

**problems faced in conserving kalimantan rainforest**

i need to know what are some problems and successes in the conserving of the kalimantan rainforest. i tried to find websites regarding this topic, but i couldn't find any with information. i would really appreaciate if anyone would be able to give me a few of such websites...
*December 23, 2007*

**maths, variations**

i'm not sure how this question works the number of hours (h) taken to paint a picture is inversely proportional to th number of pupils (p) painting it. it takes 4 pupils 3 hours to finish painting it assuming all pupils work at the same rate. a) find an equation connecting...
*December 18, 2007*

**maths, variations checking!**

question: given that y is inversely proportional to (x-1), A) express y in terms of x and a constant k b) give that y=5 when x=3, find x when y=25 answer: A)y=-k(x-1) y=-kx+k B)y=5, x=3, k(constant)=3x5 k=15 25=-15x+15 10=-15x x=-10/15 is this correct? i'm not too sure ...
*December 18, 2007*

**maths, variations**

question: if y is proportional to x, and that y=6 when x=12, (A)express y in terms of x, (B)and find to value of x when y=12. answer: (A) x=y/3 (B) x=4 is what i did correct? i would appreciate your help!
*December 18, 2007*

**Physics**

okay so this is what i did to find the work done by overcoming friction: Ff = .9 N d = .91 m (Ff x d = Wf --> .9 x .91 = .82 J) hmm okay so how would you find the work done by friction using that calculation that you just said (change in total energy = work done by friction...
*December 16, 2007*

**Physics**

One way that I found was knowing the force overcoming friction (Ff). so the equation to fin dthe work would be Wf = Ff * d.. as you said above (force*distance). But what other calculation would you use to find the wasted work without knowing the friction force?
*December 16, 2007*

**Physics**

There are two ways to find how much work is done voercoming friction. One method entails knowing the force overcoming friction. What other calculation could be done to find this wasted work?
*December 16, 2007*

**math**

yes
*October 23, 2007*

**Science**

sound
*October 17, 2007*

**science**

C) Water may evaporate rapidly
*October 6, 2007*

**chemistry**

i have to decide which one is more polar by using an arrow. 1. N-H 2. O-F 3.C-O Look up the electronegativity on a chart and take the difference between the two elements. The larger the difference the more polar.
*April 8, 2007*

**Geometery**

How do I solve this? On my assignment it says find the area inside the square, but outside the circle, given that the radius of the circle is 2 ft. Use 3.14 for ^ I have a picture of a square with a circle in the square, with a base 6 ft. and height 6 ft. Here are the choices ...
*March 1, 2007*

**word unscramble**

lorco tyssme
*September 28, 2006*

**Science (Chemistry!)**

I just do not understand ANYTHING about multiplying/dividing/adding/subtracting significant figures! For example, the problem is: Solve the following to the correct number of significant figures: (5.039)(0.0074) What am I supposed to do? Just multiply the numbers? What does ...
*August 31, 2006*