Monday

July 25, 2016
Total # Posts: 1,742

**physics**

hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the more protons ...
*September 30, 2012*

**physics**

hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the more protons ...
*September 30, 2012*

**Calc 3**

In other words, divide the plane's normal vector so that the y components match (INCLUDING SIGN), then solve for the two remaining variables. For the example above this would mean; 2xi-j+2zk=7i+2j+3k becomes 2xi-j+2xk=(-7/2)i-j+(-3/2)k Now solve for x and z like so: 2x=(-7...
*September 27, 2012*

**physics (graphs)**

Hi, i'm doing a graph for density of an element as a function of atomic number. i'm trying to calculate the slope and it's asking me to include units. if density as a unit: g/cm^3, how would i write the units of the slope? which is basically density over atomic ...
*September 26, 2012*

**Social studies**

How were the ideas of Louis XIV and Philip II similar? How were they different?
*September 26, 2012*

**Social studies**

How were the ideas of Louis XIV and Philip II similar? How were they different?
*September 26, 2012*

**Social studies**

How were the ideas of Louis XIV similar? How were they different?
*September 26, 2012*

**algebra**

How do I use the distributive property to write (e+f)(-5) as an equivalent algebraic expression?
*September 25, 2012*

**Physics**

A gull is flying horizontally 8.17 m above the ground at 6.35 m/s. The bird is carrying a clam in its beak and plans to crack the clamshell by dropping it on some rocks below. Ignoring air resistance, what is the horizontal distance to the rocks at the moment that the gull ...
*September 20, 2012*

**Math**

the rectangle is 6.1 wide and 3cm high
*September 19, 2012*

**Math**

how could you use point I to estimate the midpoint of each side of the rectangle?
*September 19, 2012*

**Nutrition**

what is a vegetarian example of a complete protein?
*September 17, 2012*

**nutrition**

What is the role of amino acids in building protein?
*September 17, 2012*

**Chemistry**

Calculate the pressure and temperature at which 1.00 mole of CO gas will be in the same corresponding state as 1.00 mole of H2 gas at 2.00 bar and 30.0 degrees celsius. How do I approach this question?
*September 15, 2012*

**math**

divide 4 by x squared and write it in the form of axb where a and b are rational constants
*September 15, 2012*

**math**

A. 1,3,6,10,___,___ B. 1, 1/2, 1/4, 1/8,___,___ C. 1,3,9,27,___,___ D. 8,7,5,2,___,___ E. 49,47,52,50,55,___,___
*September 15, 2012*

**Physics**

A car slams on its brakes. When it slammed on its brakes, it was decelerating at 6 m per sec per sec. How high would the car have to fall from to have the same force?
*September 13, 2012*

**Maths**

f (x) = x2 - 4/ x2 - 1 This needs to be plotted onto a graph, but I don't know how
*September 12, 2012*

**chemistry**

If the half-life of a first-order decomposition reaction is 24.2 minutes, how long will it take for 10.0 moles of the reactant to decompose so that only 2.5 mol remains?
*September 4, 2012*

**accounting**

The following information is related to the Lilliput Veterinary Clinic for April 2010, the firm's first month of operation: Compute the cost of services rendered.
*September 3, 2012*

**math**

57.25 28.63 14.31
*September 3, 2012*

**Math**

find K so that the following function is continuous on any interval: f(x)=kx if 0¡Üx<3, and f(x)=2x^2 if 3¡Üx K=
*September 2, 2012*

**science**

mgco3 plus 2hcl plus mgci2 plus h2 h20 plus co2 if 10grames of c02 is produced calculate the mass of magnesium and hydrochoric acid reacted
*August 29, 2012*

**biology**

Very helpful... Thanks a lot...
*August 24, 2012*

**english11**

Which of the following phrases does NOT appear in the Declaration of Independence? life, liberty, and the pursuit of happiness all men are created equal these Colonies are, and of right ought to be, free and independent states we the people of the United States
*August 23, 2012*

**english 11**

4. Which of the following statements about Anne Bradstreet is NOT true? (1 point)Anne Bradstreet was never married. Anne Bradstreet was the first published poet in America. Anne Bradstreet was born and educated in England. Anne Bradstreet favored poems with regular rhyme ...
*August 23, 2012*

**english**

thank you!!
*August 23, 2012*

**english**

Which of the following statements about literary movements is NOT true? A. A literary movement is a period that shares a particular set of ideas, concerns, or characteristics. B. Ideas, concerns, or characteristics may be shared by literary movements. C. Literary movements may...
*August 23, 2012*

**General Mathematics**

Use a table of t-values to estimate the P-value for the specified one-mean t-test. Left-tailed test, n = 12, t = -3.412 Choose one below: P < 0.005 P > 0.005 0.005 < P < 0.01 0.01 < P < 0.025
*August 22, 2012*

**Algebra**

1. Determine whether the relation is a function. {(-2, -7), (3, -5), (6, -4), (9, -6), (10, -1)} 2. Determine whether the relation is a function. {(-5, -4), (-2, 9), (-1, -2), (-1, 7)} 3. Determine whether the relation is a function. {(-7, -1), (-7, 2), (-1, 8), (3, 3), (10, -...
*August 22, 2012*

**General Computer Science**

There are several interior routing protocols. Is there a place for each one of them? Discuss in what type of network each one would work best.
*August 22, 2012*

**General Economics**

• Businesses often decide between using automation and labor in production. An automotive environment may have high fixed costs and low variable costs, and an industry that utilizes manual labor for production will have low fixed costs and high variable costs. How would ...
*August 22, 2012*

**General Psychology**

1. Do you believe that people have an unconscious mind? If so, how does it affect thoughts, feelings, and behavior? 2) Have you ever changed a strongly held attitude? What caused the change for you? 3) Do you believe that you are free of prejudice? After reading this chapter, ...
*August 22, 2012*

**Accounting**

What is the purpose of financial statement analysis? What are some tools we might use to analyze financial performance? What might we use to benchmark our performance? Why?
*August 22, 2012*

**math**

thanks, tori
*August 21, 2012*

**math**

Can someone help me how to solve it. A new medically approved wheelchair was considered to be an improvement over a standard wheelchair by 325 out of 450 patients in a survery. 20) What is the margin of error for the survey? Round your ansewer to the nearest tenth of a percent.
*August 21, 2012*

**social studies**

the first native americans gathered what? (3 things) that's why we call them hunter-gatherers.
*August 20, 2012*

**English 125 introduction literature**

In your 150 words post, summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form. If you...
*August 20, 2012*

**physics**

Hi guyys, could you help me with this question. The center of a circular floodgate of radius 0.5 m is located in a dam at a depth of 2 m beneath the free surface of the water contained by the dam. Calculate the force exerted by the water on the floodgate. The density of water ...
*August 19, 2012*

**physics**

a hemispherical bowl of radius 0.5 m is filled with water of density 997 kg/m^3. calculated the force exerted by the bowl. ans: 3840 N
*August 18, 2012*

**physics**

Hi guyys, could you help me with this question. The center of a circular floodgate of radius 0.5 m is located in a dam at a depth of 2 m beneath the free surface of the water contained by the dam. Calculate the force exerted by the water on the floodgate. The density of water ...
*August 18, 2012*

**maths**

At a certain time of the day a post, 4m tall, casts a shadow of 1.8m. What is the angle of elevation of the sun at that time?
*July 31, 2012*

**Math**

John takes 2 hours longer than Andrew to peel 400 pounds of apples. If together they can peel 400 pounds of apples in 7 hours, then how long would it take Andrew to peal the apples working alone? Please round your answer to three decimal places.
*July 24, 2012*

**math**

Debbie traveled by boat 5 miles upstream to fish in her favorite spot. Because of the 6-mph current, it took her 20 minutes longer to get there than to return. How fast will her boat go in still water? (Please round your answer to one decimal place.)
*July 24, 2012*

**Math**

Steve's boat will go 14 miles per hour in still water. If he can go 13 miles downstream in the same amount of time as it takes to go 10 miles upstream, then what is the speed of the current? (Please round your answer to one decimal place.)
*July 24, 2012*

**Math**

6/(a^(2)+a-6) = 4/(a^(2)-9)
*July 24, 2012*

**Math**

12/x + 3/(x-3) = x/(x-3) - 1/11
*July 24, 2012*

**Math**

(b+27)/(b^(2)-1) - 1/(b+1) = (b-2)/(b-1)
*July 24, 2012*

**Math**

5x/(x-4) = x + 20/(x-4)
*July 24, 2012*

**math**

1/9 - (k+3)/(72K) = 1/(9k) - (k-1)/(8k)
*July 24, 2012*

**Statistics**

A researcher claims that at least 10% of all football helmets have manufacturing flaws that could potentially cause injury to the wearer. A sample of 200 helmets revealed that 24 helmets contained such defects. a. Does this finding support the researcher’s claim? Used a ...
*July 19, 2012*

**Chem**

How long must a current of 1.20 A pass through a sulfuric acid solution in order to produce 25.0 mL of H2 gs at 25 degrees C and 1 atm pressure?
*July 18, 2012*

**Statistics**

Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw appropriate ...
*July 18, 2012*

**statistics**

In a statistic class, 10 scores were randomly selected with the following results were obtained: 74, 73, 87, 57, 71, 68, 65, 77, 67, 66. What are the inner fences?
*June 28, 2012*

**statistics**

4-(2.33)(√.25)=2.835 ounces
*June 28, 2012*

**statistics**

What is square root n?
*June 28, 2012*

**statistics**

The diameter of small Nerf balls manufactured at a factory in China is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inch. Suppose a random sample of 20 balls is selected. Find the interval that contains 87% of the ...
*June 28, 2012*

**math**

last week Coughy worked 4 hours more than Achewy. she also worked twice as many hourse as Pokey. altogether, they earned $252. if couphy earns $6.50 per hour, Achewy earns $9 per hour, and Pokey earns $5 per hour, find the number of hours that each worked.
*June 6, 2012*

**math**

the hotdog shack sold 359 hotdogs during their 2-day grand opening celebration on saturday and sunday. the number of hotdogs sold on sunday was 13 less than twice the number of hotdogs sold on saturday. how many hotdogs did the hotdog shack sell on sunday?
*June 6, 2012*

**algebra**

math: bobby has $14 more than tina while seda has twice as much money as bobby. together they have $208. how much money does each have?
*June 5, 2012*

**chemistry**

2 H20, my bad
*June 5, 2012*

**chemistry**

What Volume of 0.575M HCl will neutralize 4.22g of Mg(OH)2? I got the BRE of 2HCl + 1Mg(OH)2 ---> 1MgCl2 + H2O, what do i do from there?
*June 5, 2012*

**geometry**

The equation (x + 6)2 + (y + 4)2 = 36 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals.
*May 30, 2012*

**Chemistry**

A sample of Hydrochloric Acid (HCl) has a concentration of 5.00 %(m/v). Determine the molar concentration of the solution.
*May 23, 2012*

**Algebra 2**

2(x-2) 2(180-2)=360-4=356
*May 17, 2012*

**algebra**

What are the vertical and horizontal asymptotes of y=(4/x-3)+2
*May 16, 2012*

**6 grade math**

WHAT SCHOOL DO YOU GO TO
*May 15, 2012*

**language arts**

It also affects the way in which one family relates to another, to the neighborhood, and to the community. What correction should be made to this sentence?
*May 9, 2012*

**math**

carrie says that one solution to y=3x-5 is (4,7).Describe two ways to check if her statement is true.use at least one way to check her answer.
*May 8, 2012*

**Chemistry (Stoichiometry)**

Thank you very much
*May 8, 2012*

**Chemistry (Stoichiometry)**

Two students react 15.50g of Lead (II) nitrate with 3.81g of sodium chloride. Predict the mass of the excess reactant left over when the reaction is complete.
*May 8, 2012*

**Math**

there are 8 cards, five are black and three are white.The question is " Find the probability of icking a black than white card. HELP PLEASE!!!!
*May 8, 2012*

**College Geometry**

In discussing Frieze Groups it was assumed that there is a smallest positive translation along the axis. All translations for the pattern form a subgroup. Consider the axis to be the Reals and G to be a subgroup under +. Look at the infimum T of all strictly positive elements ...
*May 8, 2012*

**math**

Inverse of 275? I think it's -275, but I am not sure.
*May 3, 2012*

**Physics Help **

Does atomic excitation occur in solids as well as in gases? Yes or No and Why?
*May 2, 2012*

**math**

For the arithmetic series 13+19+... a. find tsub27 b. find Ssub27 c. if tsubn = 445, find n
*May 2, 2012*

**Math algebra**

Write the following as a sum and/or difference of logarithms log((∛x^2+1)/(x^2-1))
*May 1, 2012*

**Chemistry**

What is the [CrO4] in a 2.5 L saturated solution of lead (II) chromate to which 0.05 mol Pb(NO3)2 is added?
*April 29, 2012*

**Math**

Actually S=12 L=10
*April 25, 2012*

**Chemistry help!**

Hi! In practice, why is the volume of oxygen obtained from the electrolysis of water LESS THAN half the volume of hydrogen obtained? I'm guessing it might have to do with gases escaping? Help!
*April 22, 2012*

**Trig**

sin^4t-cos^4t/sin^2t cos^2t= sec^2t-csc^2t i have =(sin^2t+cos^2t)(sin^2t+cos^2t)/sin^2tcos^2t then do i go =(sin^2t+cos^2t)/sin^2tcos^2t stumped
*April 19, 2012*

**Pre-Calc help NOW PLEASE!!!**

Evaluate the expression under the given conditions. tan(A+B); cosA=-1/7, A in quadrant 3, sinB=1/2, B in quadrant 2.
*April 18, 2012*

**chemistry**

Which of the following will cause a greater amount of oxygen to dissolve in 100 g of water?
*April 17, 2012*

**chemistry**

thank you so much!
*April 16, 2012*

**chemistry**

A liquid was analyzed to be 54.5% C, 9.10% H, and 36.4% O. An empty flask, whose mass was 45.32 g, when filled with the vapor of the liquid at 735mm Hg and 99.2°C had a mass of 46.05 g. The volume of the flask was found to be 263.2 mL. empirical formula -> C2H4O What is...
*April 16, 2012*

**Pre-Calc !!!**

Prove the identity. 2tanx/1+tan^2x=sin^2x
*April 16, 2012*

**chemistry**

A closed container has a mixture of methane, CH4, ethane C2H6, and propane C3H8. If 12.5 g of methane, 36.0 g of ethane, and 14.0 g of propane have a total pressure of 890. mm Hg, what is the partial pressure of each of the gases in the container?
*April 15, 2012*

**College Comp II**

What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And the other stuck with...
*April 12, 2012*

**Comp II**

Need to write a 1000 word essay about this, but I can't figure out what the poem is even about. What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* ...
*April 12, 2012*

**ENGLISH HELP**

What is this poem's meaning and how did you understand it? March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And the other ...
*April 12, 2012*

**Chemistry**

thanks
*April 2, 2012*

**Chemistry**

the only chromate used was the amount present in 1mL of Mohr's indicator. Does it matter if no addition chromate was added?
*April 2, 2012*

**Chemistry**

Using the total volume at endpoint (51.98mL) and the fact that the concentration of CrO4 ^2- due to Mohr's indicator is 0.26 M, find the actual concentration of CrO4^ 2- at the endpoint (or at the instant just before Ag2CrO4 begins to form). Any help I am completely lost ...
*April 2, 2012*

**Math**

What is the number of revolutions in a 450pi radians
*March 30, 2012*

**math**

84.8cm
*March 29, 2012*

**math**

31 lbs of bananas cost $248. How much would 40 lbs cost?
*March 28, 2012*

**Physics**

A rectangular loop of wire, L = 26.2 cm and W = 15.4 cm, carries a I1 = 1.83 A current and lies in a plane (d = 13.6 cm), which also contains a very long straight wire carrying a I2 = 10.5 A current. I used this equation: F1+F2 = mu0*I1*I2*0.262/(2pi)*(1/0.136-1/0.290)=2.57*10...
*March 24, 2012*

**All Sub**

Yeah im talking about grades.
*March 24, 2012*