# bb

Popular questions and responses by bb-
## Language Arts

What is the topic sentence of this paragraph from life without gravity?

*asked on October 6, 2017* -
## physics

A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.30 m/s and rebounds with a velocity of -1.90 m/s. The ball remains in contact with

*asked on November 11, 2013* -
## Chemistry

what is the Ka for ethylammonium cation,C2H5NH3^+, at 25 celsius?(Kb for C2H5NH2=4.7x10^-4 at 25 Celsius)

*asked on March 21, 2013* -
## English

Please help me come up with some ideas for this, need to find appeals to emotion and appeals to reason In "All Together Now," Jordan uses Appeals to emotion and appeals to reason to try to persuade her readers that her views are important. In a paragraph,

*asked on December 3, 2018* -
## AP Chemistry

Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is given below. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 (a) What mass of acetic anhydride is needed to completely consume 4.40 102 g

*asked on August 30, 2010* -
## chemistry

A 0.12-mole sample of nitrogen gas occupies a volume of 2.55 L. What is the volume of 0.32 mol of nitrogen gas under the same conditions?

*asked on December 9, 2011* -
## math help

A number game is played with a number cube and a number line. The figure shows a number line. The numbers on the number line range from negative 10 to 10 in increments of 1. When it is your turn, you roll the number cube twice. The first roll tells you how

*asked on October 9, 2019* -
## Astronomy

The great galaxy in Andromeda has an angular diameter along its long axis of about 5 degree. Its distance is about 2.2 million light years. What is its linear diameter?

*asked on March 29, 2010* -
## Physics help please!!!

In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the kind used in smallpox vaccine). The procedure involved measuring the frequency of oscillation of a tiny sliver of silicon (just

*asked on March 29, 2012* -
## chmistry

3O2(g)---> 2O3(g) Delta H = +284.6 kJ what is the sign of delta G and delta S

*asked on February 5, 2013* -
## Chemistry

the ka of hypochlorous acid hclo is 3.5 x 10^-8. What is Kb for the hypochlorite ion?

*asked on March 21, 2013* -
## Physics help

A light rope is wrapped several times around a large wheel with a radius of 0.435 m. The wheel? A light rope is wrapped several times around a large wheel with a radius of 0.435 m. The wheel rotates in frictionless bearings about a stationary horizontal

*asked on February 27, 2012* -
## college

The expected number of heads in 160 tosses of an unbiased coin is ___.

*asked on September 14, 2009* -
## Physics

3. Calculate the amount of gravitational potential energy at the top of each hill and at the bottom of each valley. Be sure to convert your distance measurements to meters.Use an approximated value of 58.0 g for the mass of the tennis ball, and 9.81 m/s2

*asked on February 25, 2018* -
## Math

Suppose you take out a 45-year $100,000 mortgage with an APR of 6%. You make payments for 2 years (24 monthly payments) and then consider refinancing the original loan. The new loan would have a term of 20 years, have an APR of 5.9%,

*asked on April 18, 2019* -
## plagiarism workshop

Now that you have developed an in-text citation for a summary, paraphrase, and a direct quote, and created a reference for the paragraph provided in Exercise 2, reflect on the thought processes you used for each aspect. How did your approach differ when

*asked on May 12, 2011* -
## math

Sarah has a collection of nickels, dimes, and quarters worth $9.25. She has 10 more dimes than nickels and twice as many quarters as dimes. How many coins of each kind does she have?

*asked on July 13, 2015* -
## Physics

Suppose you used a 300 Hz tuning fork to produce resonant frequency in a tube whose diameter is 3.0 cm. At what length of the tube will you the resonant frequency if the air temperature inside the tube is 25 C. Assume that the tube is closed at one end.

*asked on November 18, 2017* -
## physices

A sound wave has a wavelength of 3.0 m.? The distance from a compression centre to the adjacent rarefaction centre is:

*asked on February 4, 2013* -
## chmistry

a solutiona solution is made by dissolving 3.75g of a pure nonvolatile solute in 95g of acetone. the boiling point of pure acetone was observed to be 55.95 Centigrade that,and that of the solution was 56.50 Centigrade.if the molar boiling point elevation

*asked on November 20, 2012* -
## business

how to do Legal Research for this Issue Employment Discrimination 2. Textbook reference: Chapters 5, 35 3. Possible search terms: ethics, employment discrimination, Title VII, past discrimination 4. Here is the situation: ABC Corporation decides to respond

*asked on November 28, 2011* -
## chemisty

I have to convert the following pressures into torr: 1. 2.48x10^-3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]

*asked on March 6, 2010* -
## Math

You want to purchase a new car in 8 years and expect the car to cost $21,000. Your bank offers a plan with a guaranteed APR of 5.5 % if you make regular monthly deposits. How much should you deposit each month to end up with $21,000 in 8 years?

*asked on April 18, 2019* -
## Chemisrty

Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of

*asked on December 1, 2011* -
## chemistry gas laws

In a science demonstration, 4 to 6 plastic garbage bags are arranged under a 2 m by 2 m piece of plywood. A volunteer stands on the plywood and others blow into the bags to "levitate" the volunteer. If four bags are used and a 140 lb person is on the

*asked on December 4, 2006* -
## a person stands on a bathroom scale that rest on t

a person stands on a bathroom scale that rest on the floor of an elevvator. when the elivetor is stationary the scale registers 50kg. when the lift acclelerates up ward the scle registers 60kg .taking g=10m/s^2, the best estimate acceleration of the lift

*asked on February 4, 2013* -
## Chemistry

A sample of gas at 57C and 1.02atm occupies a volume of 2.20L. What volume would this gas occupy at 107C and 0.789atm?

*asked on March 27, 2016* -
## Retailing

The steps in a retail strategy are: A. interdependent of each other. B. independent of each other. C. organized by specific and then general factors. D. organized by short- and then long-term factors.

*asked on August 25, 2016* -
## permutations and combinations

Four men and four women are to be seated alternatively at a round table. In how many ways can this be done?

*asked on January 2, 2006* -
## chemistry

What is the molar solubility of silver carbonate, Ag2CO3?

*asked on November 9, 2016* -
## MATH

you have 4 blue crayons, 2 red and 3 orange, what is the probablity of pulling a red crayon and then an orange without replacement?

*asked on December 10, 2010* -
## Chemistry

Compare the diffusion rates of hydrogen and oxygen gases.

*asked on March 27, 2016* -
## science

A student needs to mix 50 ml. of glycine with 950 ml. of distilled water. This student has only a 25 ml. graduated cylinder. How many times will the student have to use the cylinder both glycine and water to prepare the solution?

*asked on July 5, 2015* -
## Chemistry

A sample of gas is collected by water displacement. The atmospheric pressure in the room is 757mmHg and the vapor pressure of water is 17.5mmHg. What is the partial pressure of hydrogen under these conditions?

*asked on March 27, 2016* -
## Comm. Arts

Toulmin Model and Campus Gun Control? I'm getting really confused about this. I need to break down an article according to the toulmin model within the next few hours. It's about gun control on campuses. So far I've got: Claim: Guns should be allowed on

*asked on March 24, 2008* -
## uop

Choose some numbers and work in a small group to figure out how to apply the tests for divisibility by 4, 6, 7, 8, 9, and 11 given on pp. 211–214. a. Use a calculator to select some numbers that are and some that aren’t divisible by these numbers. Give

*asked on December 8, 2010* -
## chemistry

In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. How many molecules of substance B are produced when 26.5 g of substance A reacts? The molar mass of substance A is 21.9 g/mol. Step 1: Convert the mass of A

*asked on September 24, 2013* -
## algebra2

Suppose it takes 3 days for a space vehicle to travel from Earth to the moon. About how long would it take for the same vehicle traveling at the same speed to Jupiter? Moon - 240,000 mi Jupiter - 391,000,000. The space vehicle would take how many days to

*asked on February 2, 2008* -
## extraction

How to distingush organic layer and aqueous layer? The organic layer is the one on top. Most organic solvents are less dense than water. (NOte: Non-hydrocarbons such as chloroform, methylene chloride, carbon tetrachloride etc are more dense than water.)

*asked on August 21, 2007* -
## chemistry

h2s + HNO3 -->s+ no+H2O balance by oxidation number change

*asked on February 14, 2013* -
## algebra

What is the common denominator? 3 2 - + - 1 a-1 ------- 4 3 - - - 1 a+1

*asked on January 30, 2008* -
## geometry

A parallelogram ABCD has perimeter equal to 124. Let E be the foot of the perpendicular from A to BC, and let F be the foot of the perpendicular from A to CD. If AE=7 and AF=24, what is the area of the parallelogram?

*asked on March 12, 2013* -
## Insurance Forms

I need help with a few questions. Could you let me know if I'm going in the right direction. 1- CHAMPVA would be considered a primary payer for a patient who has ______ coverage. A- Medicaid B- fee-for-service C- Medicare D- SSI Answer: A 2- You should

*asked on March 15, 2011* -
## Algebra HELP:(

I am terrible at word problems. How do I work this? A large park is to be built in the shape of a rectangle. The length is to be 5 m shorter than three times the width. The perimeter of the park is to be 750 m. What will be the length and width of the

*asked on June 8, 2010* -
## Algebra

The denominator of a fraction is 2 less than twice the numberator. If the numerator is decreased by 2 and the denominator is increased by 3, the resulting fraction simplifies to 1/3. Find the original fraction. Have no idea what to do.

*asked on February 5, 2008* -
## Chemistry

A sample of gas at 57oC and 1.02atm occupies a volume of 2.20L. What volume would this gas occupy at 107oC and 0.789atm?

*asked on March 27, 2016* -
## com 155

Write a 100-word passage to Susan Anker, the author of the course’s textbook, in which you describe five details from her book that are good and five details about the book that are written well.

*asked on September 26, 2010* -
## Chemistry

What is the percent ionization of a solution prepared by dissolving 0.0286mol of chloroacetic acid, in 1.60L of water?for choloroacetic acid, Ka=1.4x10^-3

*asked on March 22, 2013* -
## chmistry

balance each of the following chemical equations ,using the change in oxidation number method. cu +h2so4=cuso4+so2+h2o

*asked on February 14, 2013* -
## Genetic engineering and Gene splicing

what's the difference between genetic engineering and gene splicing?

*asked on May 23, 2011* -
## algebra

-3x+4y=11

*asked on December 15, 2007* -
## Chemistry

what is Kc at 25 celsius for the following equilibrium? CH3BH3^+ +H2O CH3NH2 + H3O^+ Kb=4.4x10^-4 I got 4.0x10^4 / 1.0x10^-14 = 4.0x10^-10 (correct)?

*asked on March 22, 2013* -
## math

List all the subsets of S. You may use "C" for chocolate, "V" for vanilla, and "M" for mint. 1. {} 2. C 3. V 4. M 5. CV 6. CM 7. VC 8. VM 9. MC 10.MV 11. CVM Is this correct.

*asked on April 15, 2010* -
## Physics

A Car moving North at 9 m/s strikes a stationary car of equal mass. The first car moves off after the collision at an angle of 30 degrees West of North, with a speed of 6 m/s. What is the speed of the second car after the collision? My resources have poor

*asked on September 18, 2014* -
## math

Describe what happens to the three points of concurrency that determine the Euler line when the triangle is (a) isosceles, (b) equilateral.

*asked on January 24, 2010* -
## language arts

I am looking for a word that discribes this. This makes a room messy, carries a sick person, or is another name for a lot of puppies.

*asked on August 18, 2008* -
## algebra

is this right? Divide and check: 12x^3y^2/2x^5y^2 answer: 6x^-2

*asked on February 6, 2008* -
## CHEMISTRY

1. What volume of O¬2(g) is consumed in the combustion of 50.0 L of butane (C4H10) if both gases are measured at STP?

*asked on March 29, 2018* -
## algebra

Is this correct? subtract (4a^3+2b^3)-(6a^3+5a^2b-2ab^2+2b^3) answer: -2a^3-5a^2b+2ab^2

*asked on February 6, 2008* -
## algebra

Factor c^2+3c-54 v^2-4v-21

*asked on February 6, 2008* -
## government

When the Court decides a case, it bases its decision on

*asked on February 21, 2015* -
## geometry

find "d" in the radical form of a right square pyrmid with equilateral triangular faces. I have three measurements of 8.

*asked on June 16, 2010* -
## Algebra: did I do this right

find the other endpoint of a line segment with the given midpoint (6,4) endpoint ((3, 5). 6= 3/2 and 4 = 5/2 12=6 and 8 = 10 12-6 and 8 - (-10) End Point = (6, 18)

*asked on June 8, 2010* -
## college

Two parallel plates, each with zero mass and an area of 10,000 cm2 are set 0.1 mm apart and the space between them is filled with a Newtonian fluid. The upper plate is pushed in the direction shown with a constant force sufficient to accelerate a mass of 1

*asked on March 28, 2010* -
## algebra

The length of a rectangle is 9 in. more than twice its width. If the perimeter of the rectangle is 48 in., find the width of the rectangle. a) 4 in b) 5 in c) 6 in d) 7 in

*asked on January 10, 2008* -
## algebra

Rewrite the equation 2x-3y=-6 A) f(x)=2/3x+2 b) f(x)=3/2x-3 c) f(x)=3/2x-6 d) f(x)=2/3x+6

*asked on January 10, 2008* -
## Health

The difference between dysthymic disorder and major depressive disorder is that ________. A. Symptoms of Dysthymic disorder are usually less severe than those of major depression B. Symptoms of Dysthymic disorder are usually shorter than those of major

*asked on July 23, 2015* -
## phy

calculate the work done on the system when 1.00mol of gas held behind a piston expands irreversibly from a volume of 1.00dm cube to a volume of 10.0dm cube against an external pressure of 1.00 bar

*asked on March 4, 2015* -
## economics

What is the effective marginal tax rate of a government antipoverty program that guarantees every family a minimum income? Explain. Why might trying several antipoverty benefits to income level lead to an effective marginal tax rate of greater than 100

*asked on November 22, 2014* -
## geometry

If a quadrilateral has 4 congruent sides and congruent diagonals. Could it immediately be concluded to be a square?justify the answer. If not was is a counterexample

*asked on March 30, 2011* -
## algebra

Find the slope and y-intercept x=-9 a) slope:0;y-intercept: (0,-9) b) slope: undefined; y-intercept: (0,-9) c) slope: 0;y-intercept:none c) slope: undefined;y-intercept:none

*asked on January 15, 2008* -
## algebra

Write the equation of the line passing through (2,-3) and (2,4). Write the answer in slope-intercept form.

*asked on December 9, 2007* -
## SOC120: Introduction to Ethics & Social Responsibi

The ethical emotivist would most agree most which statement?

*asked on March 9, 2015* -
## math

While performing a calculation, you divide a number by 5 two times to get the answer 12. You should have divided by 5 only once. What is the correct result of the calculation

*asked on December 1, 2010* -
## algebra

Theater tickets are $8 for general admission and $5 for students. During one evening 240 tickets were sold, and the receipts were $1680. How manny of each ticket was sold? This is what I have before I get stuck: G=8 S=5 8(240-S)+5S=1680 1920-S+5S=1680 Now

*asked on December 26, 2007* -
## Chemistry

Explain the relationship between the various properties of gases including pressure, temperature, volume, amount of gas, molar mass, and particle speed.

*asked on March 27, 2016* -
## math

Solve for x: 3x − 5 = 2x + 6.

*asked on October 27, 2015* -
## math

Find the age, to the nearest month, of the people in your class. Use the average age in months as your zero and positive and negative numbers to write the age of each person in relation to the average. Work in a group to find a good visual way to display

*asked on December 13, 2010* -
## math

suppose square was not a word used in mathematics. How would you descibe the shape that the word represents?

*asked on November 10, 2010* -
## Biology

I need help with a couple of questions. I have included what I think the answers are. Could you let me know how I did? 1- A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results show an elevated

*asked on September 8, 2010* -
## Health

I was wondering if anyone could help me with these questions. I have put what I feel are the correct answers. Please let me know if I did ok & thanks. 1- A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood

*asked on September 8, 2010* -
## Chemistry

I have to convert the following pressures into torr: 1. 2.48x10^-3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]

*asked on March 6, 2010* -
## literary

you can mix things in it, hold briks together with it, or fire it.

*asked on August 18, 2008* -
## algebra

(8x-6) - (4x-5)

*asked on March 31, 2008* -
## geography

Is there a certain rhyme out there to help study state capitals?

*asked on January 24, 2008* -
## algebra

Solve the system by graphing. x+y=4 -x+y=2 How do I graph this?

*asked on January 10, 2008* -
## Algebra 1

Solve the following system by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent. 10x+2y=7 y=-5x+3

*asked on December 27, 2007* -
## algebra

Solve the following by graphing: 2x - y = 4 2x - y = 6

*asked on December 26, 2007* -
## English

Serious is to careful as nervous is to____________

*asked on September 11, 2011* -
## algebra: please check

p/3-3p/8=3 p-3p/8=9 p-3p=72 -316 I am not sure if I did this right. Just guessing.

*asked on June 10, 2010* -
## physics

I am getting 0.144 nm for this but I didn't make use of the force. Do you have to use the force? A force of 4.6 x 10-15 N acts between an electric dipole with dipole moment 2.3 x 10-29 C m and an electron. How far away from the dipole is the electron

*asked on February 6, 2010* -
## algebra

f(x)=x2(squared)-7x+10, find (a)f(0), (b) f(5), and (c) f(-2)

*asked on December 15, 2007* -
## english

please help me unscramble this word hippayen Try these: http://www.ssynth.co.uk/~gay/anagram.html http://www.unscramble.net =)

*asked on December 21, 2006* -
## physices

A sound wave has a wavelength of 3.0 m.

*asked on February 4, 2013* -
## algebra 1

simplify the following fractions by rewriting them in factored form and finding all the "ones" you can....plis help.. 42/60, 16/80, 51/17, 7/33...

*asked on September 19, 2010* -
## algebra

Is this right if I substitute -2 for x? f(x)=x^2-7x=10 f(-2)=-2^2-7(-2)+10 f)-2)=-4-(-14)+10 f(-2)=-8

*asked on December 15, 2007* -
## calculus

f(x) = (3x^3+5x^2+8x-8)/x find the derivative

*asked on January 31, 2013* -
## calculus! please help

simplify tan^2 theta + 1/ tan^2 theta csc2 theta –1 ~ tan2 theta ~ 1

*asked on May 27, 2012* -
## math

ã10(ã11-ã7) can you help me multiply and simplify

*asked on October 13, 2010* -
## math

ã10(ã11-ã7) can you help me multiply and simplify

*asked on October 13, 2010*

## Pages

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