Wednesday

February 22, 2017
Total # Posts: 28

**Chemisty**

The average human body has 1.4x10^2 g of total K within it. Calculate the activity in disintegration/year of the potassium-40 in the average human body using your value of t1/2 (or K) of this substance

*August 23, 2012*

**calculus**

find a vector equation of the line, which passes through the point (1,3,11) and is perpendicular to the yz-plane

*March 18, 2012*

**biology**

what are the advantages for using nanotechnology?

*March 12, 2012*

**biology**

how can nanobots be used to fight the common cold?

*March 12, 2012*

**Calculus**

if vector a is parallel to vector b, but in the opposite direction, express the magnitude of a+b in terms of magnitudes of vectors a and b

*February 15, 2012*

**Calculus**

hah im trully very SORRY, ok now i double checked.. so everything should be right .... u, v, w are UNIT VECTORS. the angle between u and v is 25 degrees and the angle between vector v and w is 35 degrees. find (u+w-3v). NOTE: vector u and w are on opposite sides of vector v.

*February 11, 2012*

**Calculus**

SORRY, i wrote this question wrong before ... u, v, w are UNIT VECTORS. the angle between u and v is 25 degrees and the angle between vector v and w is 35 degrees. find (v+w-3v). NOTE: vector u and w are on opposite sides of vector v.

*February 11, 2012*

**Calculus**

u, v, w are UNIT VECTORS. the angle between vector v and w is 35 degrees. find (v+w-3v). NOTE: vector u and w are on opposite sides of vector v.

*February 11, 2012*

**calculus**

when does vector (a+b) = (a-b) mean? explain

*February 10, 2012*

**second grade**

don't listen to bill. he is in high school.

*September 30, 2010*

**biology**

How do organ systems work together to maintain homeostasis?

*February 18, 2009*

**Science**

Thanks a lot for helping

*September 18, 2008*

**Science help me........please**

please help me...pls

*September 18, 2008*

**Science**

A liter of water has a mass of 1000 g. What is the density of water?

*September 18, 2008*

**Science**

I need to write a paper (1500-2500)on Scientific Inquiry. I need to answer the impact society has had on the progress, if ethical or moral values figure into the research and sharing of information. I have used different search engines, but none have come up with the exact ...

*April 26, 2008*

**Science**

They were originally radiolabeled and the end result will only have two radiolabeled strands. Is this Correct?

*April 14, 2008*

**Science**

After replicated a DNA molecule with two strands three times, how many molecules of DNA are formed? Is eight the correct answer?

*April 14, 2008*

**Science**

Does anyone have any suggestions on where I might find the answers to my question? I have tried several different ways, but have not been successful. I think if I find the first one, I will find the others. If you have two strands of DNA, how many new DNA molecules will form ...

*April 13, 2008*

**Science**

Can someone tell me if I answered my question correctly? During the cell cycle when does DNA replication take place? During interphase and the DNA synthesis separates the eukaryotic cells into four phases. Gap 1 phase is the intervals between mitosis and initiation of DNA ...

*April 10, 2008*

**absolute value**

Is this right? x^2-14=0 x^2-6=0 x^2=14 x^2=6 sqrtx^2=sqrt14 sqrtx^2=sqrt6 x=+-sqrt14 x=+-sqrt6 solution set is: {+-sqrt6, +-sqrt14}

*April 3, 2008*

**absolute value**

|x^2-10|=4 x^2-10=4 or x^2-10=-4 X^2-14=0 x^2-6=0 (x-7)(x+2)=0 (x-2)(x+3)=0 x=7 x=-2 x=2 x=-3 solution set {-3,-2,2,7} (?????)

*April 3, 2008*

**absolute value**

|8m+7|=9 8m+7=-9 or 8m+7=9 -7=-7 -7=-7 8m/8=-16/8 8m/m=2/8 m=-2 m=1/4 the solution set is {-2, 1/4} Is this correct or do I need to go further or completely wrong!

*March 21, 2008*

**Algebra**

Can some one tell me if I have done this right? Write an equation in standard form with only intergers for the following line. The line with slope 6/7, through (0,7) y=mx+b y=6/7x+7 -6/7 -6/7 -7*(6/7x+y)=7*-7 6-7y=49

*March 20, 2008*

**Algebra**

i do not get this use division to determine whethe the binomial is a factor of f(x) F(x)=x^3+20x-32; x-2 yes or no

*March 15, 2008*

**Algebra**

I meant to put y^2/x^3 as my answer. Is that correct?

*March 13, 2008*

**Algebra**

do the indicated operations and write with only positive exponents and assume all variables are nonzero real numbers x^-5 y^7/x^-2 y^5 y^2/x^3 x^3=0

*March 13, 2008*

**music**

Is concertos a genre of the Romantic period that influenced or had an effect on music today? I think it did but I cannot find an example.

*February 9, 2008*

**Chemistry**

250-mL volumetric flask, 125 mL of a 6.0 M hydrochloric acid was added. This was then diluted with more water to reach the 250-mL mark. What is the molarity of the acid at this time? Initial: M1 = 6.0 M hydrochloric acid V1 = 125 mL = 0.125 L Diluted: M2 = ? M hydrochloric ...

*February 8, 2008*

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