Thursday
December 18, 2014

Posts by x


Total # Posts: 57

Chemistry
Dr. Bob, Can you explain this one please? Feel free to use made up numbers. I'm not looking for an answer, I'm just not understanding this question and looking for further help. Thank you
November 22, 2014

Chemistry
Calculate the volume of concentrated reagent required to prepare the diluted solution 17 M H3PO4 to prepare 939 mL of 6.7 M H3PO4
November 22, 2014

Math
This is not the right formula
November 3, 2014

CHEMISTRY
When 10.8 g of Silver was reacted with Sulfur, 12.4 grams of product was produced (there was only one product). What is the empirical formula of the product?
October 30, 2014

Honors Physics
Give some examples of applications that resulted from work done by physicists. The answers I have are: computers, electricity, cars, and television. Are these acceptable?
August 24, 2014

Honors Physics
Give some examples of applications that have resulted from work done by physicists on the exploration of space.
August 24, 2014

Honors Physics
Give some examples of applications that resulted from work done by physicists. The answers I have are: computers, electricity, cars, and television. Are these acceptable?
August 24, 2014

Maths Probability
anyone please provide answers to above problem.
May 15, 2014

Physics
9.34*10^13
February 25, 2014

social studies
My homework from the board says "Finish color illustration for Gilgamesh" but I don't know what that means.(If someone can answer me before *8:00 am I would be very grateful.) What am I supposed to do?
December 10, 2013

science
The answer is D) Biodiversity increases as humans develop sustainable ways of using natural resources. Biodiversity is basically the variety of plant and animal life in a particular habitat. However, if humans fail to use natural resources sustainably, habitats get destroyed. ...
December 9, 2013

MATH
Following Steve's explanation, you can also have an increase by over 100%. For example, a price could increase by 200% - if the original price was $200 and then doubled to $400. This is possible because the original price was $200 - so 100% of the price is $200. When it ...
December 9, 2013

English
Your English seems nearly perfect - but you should always capitalize the pronoun 'I' when using it - and brackets should be used before the full stop. Otherwise, your English seems fantastic.
December 9, 2013

MATH
All you have to do in this situation is substitute (-2) for the variable (x) in the equation. You can do this because all coordinates are of the form (x,y). Anything in the place of (x) can be seen as equal to (x). So, substituting, we can see: 2(-2) - 3y = 5 -4 - 3y = 5 -3y...
December 9, 2013

MATH
Here, all you have to do is simply substitute (3) for the variable (x) in the equation. You can do this because all coordinates are of the form (x,y), and anything that takes the place of (x) in that form can be seen as equal to (x). The working is shown below: y = 2(3) + 4 y...
December 9, 2013

MATH
Here, all you have to do is substitute (7) for (y) in the equation. You can do this because all coordinates are of the form (x,y), and any number that is in the place of (y) in this format can be seen as equal to (y). The working is shown below: 5x - (7) = 3 5x = 10 x = 2 As ...
December 9, 2013

chem help
I may be incorrect here - as this contradicts with the previous answer, but this is how I would tackle this problem. One mole of nitrogen has a mass of 14 g/mole (which can be seen on the periodic table). In one mole of NaNO3 (sodium nitrate), the mass is 85g/mole (adding all ...
December 9, 2013

5th grade science
Well, it is certainly not a property of electrons, protons, and neutrons - only electrons and protons, as neutrons have a neutral charge (so no charge whatsoever). Forgive me if I am incorrect here, but I do not believe that you can simply conduct 'current'. You can ...
December 6, 2013

5th grade science
As a follow-up to PsyDAG's answer, a non-metal is an element which, quite simply, is not a metal. These non-metals include Oxygen, Nitrogen, and Chlorine to name a few. Copper, however, is a metal, and therefore copper wire cannot be correct as the question asks for a non-...
December 6, 2013

7th grade mat
This answer is absolutely correct - well done!
December 5, 2013

math
126.00
September 9, 2013

Physics
Four equal +6.00-μC point charges are placed at the corners of a square 2.00 m on each side. ( = 1/4π = 8.99 × 109 N · m2/C2) (a) What is the electric potential (relative to infinity) due to these charges at the center of this square?
May 27, 2013

trig
A hiker walks 900m east and 500m south .Find the bearing of the finishing position from the staring point?
May 25, 2013

statistica
What is the range of the values 2.0, 3.7, 4.9, 5.0, 5.7, 6.7, 8.5, and 9.0?
May 10, 2013

Economics
i'm doing the same question and i found it to be 1, however i did not rearrange the demand curve. how are we supposed to reaggrange the curve? confused *
April 10, 2013

math
Application Giovanni is flying his Cessna airplane on a heading as shown. His instrument panel shows an air speed of 130 mi/h. (Air speed is the speed in still air without wind.) However, there is a 20 mi/h crosswind. What is the resulting speed of the plane?
March 8, 2013

Physics
anyone?
March 5, 2013

physics
An electron is projected, with an initial speed of vi=1.38e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal to twice its initial ...
March 4, 2013

physics
and the aswers are?
March 3, 2013

MATH
UNSCRAMBLE 25 LETTERS TO MAKE 8 WORDS THAT ANSWER THE QUESTION WHAT'S WRONG WITH GETTING A HAIRCUT? LETTERS: H I T I S B E T E R T O G E T T S E M L O C R E T
February 21, 2013

math
A trapezoid has an area of one and a perimeter of five. If this pattern continues, what is the perimeter of a large trapezoid with an area of 96
February 21, 2013

physics
You step into an elevator holding a glass of water filled to a depth of 7.0 cm. After a moment, the elevator moves upward with constant acceleration, increasing its speed from 0 to 2.8 m/s in 3.8 s.
November 23, 2011

chemistry
so we did a chemistry lab to find the relationship between temperature and volume or charle's law. In the experiment, i got t1v1=372K, 267.2 cm^3 t2v2=277K,169.1 cm^3 so i graphed that THen they told us to chose 2 other points from that line, TaVa and TbVb and find its K ...
May 5, 2011

math
Two angles of the triangle have given measures. Find the measure of the third angle x degrees, 120 degrees minus x degrees
April 13, 2011

algebra
6x-y=-4 2x+2y=15 Solve for y
December 9, 2010

chemistry
There is a fairly simple answer to this: The question states that you assume there are three magnesium isotopes. If Magnesium 24 has an abundance of 78.99%, and Magnesium 26 has a percent abundance of 11.01%, the percent abundance of Magnesium 25 is simple to calculate. The ...
December 8, 2010

Finance
auk
November 7, 2010

Pre-Algebra
Don't you just times each other by the LCD (which is 28) times 7 on 1/4 and get 7/28 times 4 on 2/7 and get 8/28? So 7/28<8/28??
October 20, 2010

marketing
using an MIS requires extensive training; a DSS does not
August 5, 2010

Algebra
A piggy bank contains only nickels and dimes. In all there are 42 coins with a total value of $3.85. How many nickels are in the piggy bank?
August 4, 2010

Short Story
It's pretty good....hope the teacher won't get bored to death though....the storyline is not that great but just add some more to it.....right now, it's just like blah
May 13, 2010

social studies
Dont know:(
April 14, 2010

For Hellpp - Algebra 2
woops sorry edited the wrong box there we go
May 20, 2009

Math
What are names for shapes of curves?
February 22, 2008

Chemistry
so we did a chemistry lab to find the relationship between temperature and volume or charle's law. In the experiment, i got t1v1=372K, 267.2 cm^3 t2v2=277K,169.1 cm^3 so i graphed that THen they told us to chose 2 other points from that line, TaVa and TbVb and find its K ...
February 16, 2008

Chemistry
I am graphing temperature vs volume. Temperature-horizontal axis, Volume-vertical axis.
February 16, 2008

Chemistry
What does the point at which your curve crosses the horizontal axis represent?
February 16, 2008

Math
For graphs what does a direct, inverse, linear and power relationships mean?
February 16, 2008

algebra
[(-1/3a^2b^3c)^2*(-9/2ab^2c^2)+(+3/5a^4b^5c^3)^2:(-3/5a^3b^2c^2)]^2:(+11/10a^2b^8c^4)
February 6, 2008

U.S. History
What would be an example of scientific management today?
February 4, 2008

Chemistry
Number and arrangement of the electron pairs around: a. C in CCl4 b. S in H2S c. Al in AlH3 d. Ga in GaCl3
February 3, 2008

Chemistry
Number and arrangement of the electron pairs around: a. C in CCl4 b. S in H2S c. Al in AlH3 d. Ga in GaCl3
February 3, 2008

Alegbra II
Factor: 125x^3 - 27 = 0
January 29, 2008

Algebra II
A feasible region has vertices at (-3,2),(4,1),(2,6) and (1,-2). Find the maximum an minimum values of the function f(x,y)=4x-y
October 28, 2007

Math
what is a significant digit
September 11, 2007

physic
Neutron stars are extremely dense objects with a mass comparable to the mass of the sun but a radius of only several thousand meters. Consider a neutron star of mass M = 1.99e+030 kg and a radius of R = 10 km. g = 1.3279e12 m/s Assuming uniform density, how much would 1.1 ...
May 23, 2007

physic
Assuming uniform density, how much would 1.1 cubic centimeters of neutron star material weigh on the surface of the earth? You need the density of the neutron star to do this. weight= mass*g=density*volume*g
May 23, 2007

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