Thursday

April 17, 2014

April 17, 2014

Total # Posts: 2,498

**chemistry**

DrBob222 I am 11 years old and in sped I don't understand your answer. Please give a little more detail.

**chemistry**

Tungsten is a dense metal that is used to make the filaments in incandescent light bulbs. A piece of tungsten has a volume of 5.2 cubic centimeters and a mass of 100 grams. What is the density of tungsten?

**physical science**

3 hours

**physical science**

a component or assembly of components that performs a specific function

**Random?**

good question. i have often wondered that my self

**Random?**

it gives the person encouragement and a sence of accomplishment

**Algebra**

Could someone help me with this question Simplify the rational expression. (3x^2y+9xy^2-12y^3)/(36x^3y-27x^2y^2-9xy^3)

**Algebra**

Could someone help me with this question Simplify the rational expression. (3x^2y+9xy^2-12y^3)/(36x^3y-27x^2y^2-9xy^3)

**Macroeconomics**

What are the key elements of the scientific method and how dose this method relate to economic principles and laws?

**English/General Knowledge**

What are some of the social issues in today's society? I'm supposed to make an Advocacy speech to effect positive changes on a social issue.

**earth science**

how did cultures throughout history attempt to explain events such as volcano eruptions, earthquakes, and ecipses?

**Algebra**

oh I see... but can u still simplify it further by taking -1?

**Algebra**

Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9(5-9x)/((x-5)(x+5)) but it seems to be wrong. Can anyone solve this for me and see what they get? Thank you

**Algebra**

It still shows me as wrong when I submit online

**Algebra**

so will the final answer be 9(5-9x)/((x-5)(x+5)) ?

**Algebra**

sorry what I was suppose to write was 9y(5-9x)/y((x-5)(x+5)) do you see where there is still a mistake?

**Algebra**

sorry what I was suppose to write was 9y(5-9x)/y((x-5)(x+5)) do you see where there is still a mistake?

**Algebra**

I did that u get 9y(5-9x)/((x-5)(x+5)) but it is still wrong

**Algebra**

Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9y/y(x+5) but it seems to be wrong. Can anyone solve this for me and see what they get? Thank you

**science**

Its stellar classification, based on spectral class, is G2V, and is informally designated a yellow star, because its visible radiation is most intense in the yellow-green portion of the spectrum.[13] In this spectral class label, G2 indicates its surface temperature of approxi...

**Math**

I tried using the formula there, but my answer seems wrong. I end up with the integral of radical x + a weird fraction, which doesn't seem to integrate well. Am I doing something wrong or is it just a complicated problem? Thanks for the help

**Math**

Find the area of the surface generated by revolving the curve y = (x + 3)^1/2, 2 ≤ x ≤ 4 about the x-axis.

**algebra**

pliis the equivalent form indicated for each of the following fractions 7/9=?/45 and 11/5=?/35 pliis help meee

**9th grade**

pliis the equivalent form indicated for each of the following fractions 7/9=?/45 and 11/5=?/35 pliis help meee

**College Chemistry**

a)What is the theoretical yield for this reaction under the given conditions? b)What is the percent yield for this reaction under the given conditions? 1.41gH2 is allowed to react with 10.4gN2,producing 2.46gNH3

**Chemistry**

I got 4.6102*10^-6 and it is wrong...Can you step me through the problem?

**physics**

two ropes are attached to a 200. kg sled. A 490. newton dog attached to on eo the ropes applies a force of 300. N b north of the rope. A 35.0 kg dog attached to the second rope applies a force of 125 N b 36.9 degrees south of west to the rope. Calculate the net force applies t...

**Algebra 2**

factor 5x^2-35+60

**HIS 125**

• Create a timeline of four to six significant events that occurred during World War II. o Include the following in your timeline: The year the event occurred The name and a short description of the event A short explanation of why the event was...

**math factoring**

5x^2-35+60

**chemistry**

labelled diagram of an experiment magnesium with oxygen

**4th grade**

What subject do you have to write about? If your teacher didn't give you one, pick a subject that you would like to write about :)

**fractured math definitions**

a chord

**physic basics**

Use the fact that the speed of light in a vacuum is about 3.00 x 10^8 m/s to determine how many kilometers a pulse from a laser beam travels in exactly 1.7 hour(s). i converted 1.7 hours to secs but im stuck there and i dont know what to do for the rest of the problem

**English**

Some islands are of the coast of Californa. What is th sbject and prepositio in this sntence?

**science**

What is the latin greek word for single PLZ HELP ME !!!!!!

**bio II**

what is the "transforming factor" that alters pneumonia bacteria?

**math**

find c from the formula h=abc when h=40, a=2, b=5

**Chemistry**

A sample of 8.44 grams of NaOH is dissolved into 536 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 1.96 gallons of water. You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? Answe...

**Algebra 2 Honor**

On one day the value of $1.00 U.S. was equivalent to 0.77 euro. On the same day $1.00 U.S. was equivalent to $1.24 Canadian. Write the function to represent the value of Canadian dollars euros. What is the value of the function for an input of 5 rounded to nearest cent, and wh...

**7th grade**

What is the least common multiple of 35, 70, 140

**social studies**

Name two states that extend futher south than louisiana

**algebra**

how do you graph the function... f(x)=2^x over the interval -2 is less than or equal to x is less than or equal to 3. Help please! THANKS!

**algebra**

solve for r a+ar=b+r Help! Thank you.

**8th grade science**

science what is a control group

**pre algebra**

how do you complete this problem -4x+7=11

**CHEMISTRY**

umm DrBob222 i still dont understand wat u did.... lik is it possible for a step-by-step help?

**CHEMISTRY**

1. You have 88.8 mL of 2.50 M solution of Na2CrO4 (aq). You have 125 mL of a 2.50 M solution of AgNO3 (aq). Calculate the concetration of Na+ when the two solutions are added together. 2. You have 75.0 mL of 2.50 M solution of Na2CrO4 (aq). You have 125 mL of a 1.84 M solution...

**Physics**

Two non-parallel light rays initially converge to a single point on a screen. A rectangular block of glass is now placed somewhere in front of the screen, in the path of the light rays, so that the glass surface is parallel to the screen. Where is the new convergence point of ...

**Physics**

very narrow beam of white light is incident at 40.40° onto the top surface of a rectangular block of flint glass 11.8 cm thick. The indices of refraction of the glass for red and violet light are 1.637 and 1.671, respectively. Calculate the dispersion angle (i.e., the dif...

**AP Physics**

A rock thrown straight up with a velocity of 30 m/s from the edge of a building just misses the building as it comes down. The rock is moving at 47 m/s when it strikes the ground. How tall was the building? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m.

**Confused-Math**

Your calculator gives an answer of x=1.1578074156, y=2E-13 when using ROOT or ZERO in the graphing mode. Give the coordinates of the x-intercept your calculator has given you to the nearest thousandth. <<< ? I have no idea how to solve these. Someone please explain th...

**math**

how do you find all real and non real solutions to these type of equations?: (x+3)^2 - 81=0 (x+1)(x-2)=18 THANKS!

**Math**

But how do you figure out T? Out of the multiple choice answer nothing is coming close to one of the answers these are the multiple choice answers A) $2116.98 B) $18.57 C) $1857 D) $1818.44

**Math**

Choose the one alternative that best completes the statement or answers the question. Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent. Martin takes out a simple-interest loan at 7.5 %. After 6 months, the ...

**math**

5x2=10

**geometry**

the endpoints of a line segment graphed on a cartesian coordinate system a (-2,6) and (1,2). what are the aoordinates of the midpoint of the segment?

**Chemistry **

Calculate the cell potential for the electrochemical cell consisting of Ag metal in a 0.500 M AgNO3 solution and Fe metal in a 3.0 M Fe(NO3)3 solution.

**algebra**

The length of a rectangular field is 18 m longer than the width. The field is enclosed with fencing and divided into two parts with a fence parallel to the shorter sides. If 216 m of fencing are required, what are the dimensions of the outside rectangle?

**History **

What is the outcome/results of the Genocide Rwanda conflict & what are its consequences for the UN?

**Algebra**

If a square handkerchief has an area of w^2+4w+4feet, what is the length of one side?

**math**

-35

**math**

resipical x/7=-5 ?

**math**

-15

**math**

multiply by the resipical 1/5p=-3

**math**

1/4y=-12 , 1/5p=-3 , x/7=-5

**caring for scool-age childfren**

for your second Q the answer is C lives with her parents,her grandm.....

**caring for school -age children**

for your second Q;is D is emphasizes the role......

**calc**

find the average rate of change on the indicated intervals f(x) = x^3 - 2x ; [0,4]

**algebra**

can someone pls show me how to work this 1) x+y=0 7x-7y=0 2) 2x-5y=1 3x+y=-7 3) 1/3x-4=6 x-3y=0 can someone show me how to work these please asap today thanks

**social studies**

These organizations have done very little on reducing tribal poverty and encouraging prosperity. As noted in our text: Today’s Native Americans are the “most undernourished, most short-lived, least educated, least healthy.” The BIA was organized to be in charge ...

**ETH/ 125**

Do you still need help? I have this paper I wrote for the same class, you can look over it to get some good ideas. Let me know if you still need it.

**ENGLISH**

What is the proper noun and common noun in this sentence. On his journey back to America, Victor sailed on the Princess.

**physics**

how is Gauss's Law use in determining the electric field anywhere around a point charge and how is this related to Coulomb's law?

**Physics**

Hello, Here is what I came up with: A) The vector pointing down is the weight from the stone on the Earth. To make the net force zero, you need to have an equally opposite force exerting itself on the stone, say the ground pushing its own force against the stone, the two force...

**physics**

two equally charged plates with finite length l is positioned side by side (parallel) and separated by distance d. what is the electric field intensity between the plates?

**physics**

consider a solid metal ball with radius r and charge q. what is the electric field intensity at the center, anywhere inside the ball and anywhere outside the ball?

**chemistry**

The pH of a 0.10 M salt solution is found to be 8.10. Determine the Kb and the degree of ionization of the basic ion.

**Statistics**

Find z such that 20.3% of the standard normal curve lies to the right of z. 0.831 0.533 -0.533 -0.257 0.257

**Statistics**

As x increases, does the value of r imply that y should tend to increase, decrease, or remain the same? Explain. ( Since r is zero, as x increases, y decreases. Since r is negative, as x increases, y remains the same. Since r is negative, as x increases, y decreases. Since r i...

**Statistics**

. Suppose a certain species of fawns between 1 and 5 months old have a body weight that is approximately normally distributed with mean kilograms and standard deviation kilograms. Let x be the weight of a fawn in kilograms. Convert the following x interval to a z interval. Rou...

**Statistics**

Assuming that the heights of college women are normally distributed with mean 62 inches and standard deviation 3.5 inches, what percentage of women are between 58.5 inches and 72.5 inches? (Points: 5) 34.1% 84.0% 15.7% 13.6% 97.6%

**Statistics**

The heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3 inches. What is the probability that the average height of a sample of ten 18-year-old men will be less than 70 inches? Round your answer to four decimal places. ...

**Statistics**

yes statistics it is

**Jared**

Suppose that x has a distribution with = 10 and = 5. If a random sample is taken of size n = 44, find . 10.00 0.75 1.51 0.11 my answer was 0.75 is this 5.00 correct

**Statistics**

A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-hour fast, the random variable x will have a distribution that is approximatel...

**Statistics**

my answer to this is 1.519 from 0.44

**Statistics**

Find z such that 44.0% of the standard normal curve lies to the left of z. 0.151 -0.772 -0.151 -1.519 1.519

**Statistics**

my answer is 0.633 is this correct , it not exact but closer

**Statistics**

my answer is equals 15.7 is this correct

**computers**

I've figured out that the missing one the "copyright disigns and pantent act" anyway

**computers**

Hello everyone I have this homework about protection programs can you tell me wat these r. plz The Data protection act The Computer missuse act and one more which iv'e forgotten Can you tell me what that missing one is or wat those acts are all about. Thanks

**Geography**

A type of Wave P.S It's _ _ _ _ _ _ _ and it's not tsunami

**Geography**

A circulating current of warmer material(such as magma) P.S It is 2 words and they are _ _ _ _ _ _ _ _ _ _ / _ _ _ _ _ _ _

**Geography**

What do the crust and upper mantle form?

**chemistry**

1.40 m high

**chemistry**

1.40 m high

**chemistry**

what pressure (in atm) is exerted by a column of mercury 1.4O high? The density of mercury is 13.5951 g/cm3.

**algebra**

at what value of x does the perpendicular bisector of the line segment with endpoints (-2,6) and (5,-4) cross the x-axis?

**Chemistry**

John forgot to add the few drops of water resulting in the presence of some Mg3N2 in the final solid product. Will her reported magnesium to oxygen mole ratio be reported too high or too low? Explain. Hint: The Mg: N mass ratio is 1:0.38, and the Mg:O mass ratio is 1:0.66.

Pages: <<Prev | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | **17** | 18 | 19 | 20 | 21 | 22 | 23 | Next>>