# christine

Popular questions and responses by christine-
## maths

Starting from one oasis, a camel walks 25km in a direction 30 degrees south of west and then walks 30km toward the north to a second oasis. What distance separates the two oases?

*asked on June 6, 2011* -
## KISWAHILI

Eleza maana ya misemo ifuatwayo a)giza la ukata..... b)meza mate machungu

*asked on April 21, 2019* -
## balanced equation

? MnO4– + ?H+ + ?C2O42– --> ?Mn2+ + ?H2O + ?CO2 what's the balanced equation? correct coefficients? is it 1MnO4- + 2H+ + 1C2O42- --> 1Mn2+ + 1H20 + 2CO2 ? c2042..? are you missing parenthesis somewhere? oh i see, no i believe this is correct: MnO4- +

*asked on April 29, 2007* -
## Physics!

The following four forces act on 4.00 kg object: F1 = 300 N east F2 = 700 N north F3 = 500 N west F4 = 600 N south What is the acceleration of the object?

*asked on November 1, 2011* -
## Physics

A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest in a distance of 140 m. What is the constant force applied to the car to bring it to rest?

*asked on November 1, 2011* -
## Math

The dimensions of a gift box are consecutive positive integers such that the height is the least integer and the length is the greatest integer. If the height is increased by 1 cm, the width is increased by 2 cm, and the length is increased by 3 cm, then a

*asked on June 7, 2009* -
## math

Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the

*asked on May 2, 2010* -
## physcial science

What are the wavelength limits of the audible range of the sound spectrum? (Use the speed of sound in air. The speed of sound in air is 344 m/s. The audible range of the sound spectrum contains frequencies as low as 30 Hz and as high as 25 kHz.)

*asked on June 23, 2015* -
## calculus

can you please help me solve this problem if dy/dx=ycosx and y=3 when x=0, then y=

*asked on March 20, 2011* -
## phys

A long distance swimmer is able to swim through still water at 4km/hr. She wishes to swim from Port Angeles, WA due north to Victoria, B.C., a distance of 50km. An ocean current flows through the Strait of Juan de !@#$%^&a from west to east at 3km/hr. In

*asked on October 19, 2008* -
## Chemistry

Suppose you have two solutions to titrate with NaOH: (a) 10 ml of.1M HCL (b) 10 ml of .1M CH3COOH would you expect either of the solutions to require different volumes of NaOH in order to reach an end point? Explain

*asked on December 9, 2011* -
## Algebra 2 Honors

Find all solutions if 0 degrees is less than or equal to x and x is less than 360 degrees. 2 sin^2(x)+ sin(x)=1

*asked on June 6, 2010* -
## physics

A uniform metre rule of mass 120g is pivoted at 60cm Mark.At what point should a mass of 50g be suspended for it to balance horizontally

*asked on March 14, 2020* -
## Chemistry

Write a balanced equation for the incomplete combustion of gaseous pentane (C5H12) which combines gaseous oxygen to form carbon dioxide, gaseous water and carbon monoxide.

*asked on November 6, 2012* -
## math

If a and b are positive integers and their product is 3 times their sum, what is the value of 1/a + 1/b? Given that ab = 3(a + b). From this, ab/3 = a + b. Dividing through by ab yields 1/a + 1/b = 1/3.

*asked on June 30, 2005* -
## Chemistry

Given the following acid dissociation constants, which acid has the strongest conjugate base? a. HCN Ka = 6.2 x 10-10 b. HOCl Ka = 3.0 x 10-8 c. HIO3 Ka = 0.17 I believe the answer is HCN it has the lowest Ka and is the weakest acid.

*asked on June 13, 2018* -
## Chemistry

Write a balanced equation for the combustion of gaseous ethane (C2H6) a minority component of natural gas, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

*asked on November 6, 2012* -
## Physics

Two balls undergo inelastic collision. The y-momentum after the collision is 98 kilogram meters/second, and the x-momentum after the collision is 100 kilogram meters/second. What is the magnitude of the resultant momentum after the collision?

*asked on June 15, 2012* -
## chem--please help me check my answer!!

write an ionic and net ionic equation for the following reaction between Fe3+ and NH4OH. Please check my answer!! Thank you. My answer is: ionic: Fe3+(aq) + NH4OH--> Fe(OH)3 + NH4+ net ionic: Fe3+ +OH- -->Fe(OH)3

*asked on October 25, 2010* -
## 7th grade

What is the definition of the word "hamebells" from the book "The Red Pony" by Steinbeck. I have searched all dictionary sources I could and can't seem to find out anythin on it. Is it, perhaps, a slang word for something else?

*asked on September 9, 2009* -
## Physics

Planet Jupiter revolves around the Sunin 12 years (3.79 X 10^8 sec. What is its mean distance from center of Sun? mass of sun is 1.99 x 10^30 kg.

*asked on June 17, 2012* -
## Chemistry

what is the difference between a basic bunsen burner and the tirrll burner

*asked on September 24, 2010* -
## math

there are 12 men on a basketball team, and in a game 5 of them play at any one time. if the game is 1 hr long and if each man plays exactly the same amount of time how many minutes does each man play? a) 10 b) 12 c) 24 d) 25 e) 30 b) 12 NO. Its d) 25. With

*asked on June 29, 2005* -
## Biochemistry

An enzyme-catalyzed reaction was carried out in a 0.2M �Tris� buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter of H+ was produced. (pKa of Tris =8.1) (a) What was the ratio of Tris+ (conjugate acid) / Triso (Conjugate base) at the start of

*asked on June 26, 2016* -
## Chemistry - Rate Determining Step

The rate law for the reaction 2NO (g) + Cl2 (g) -> 2NOCl (g) is given by rate = k[NO][Cl2] A mechanism involving the following steps has been proposed for the reaction: NO (g) + Cl2 (g) -> NOCl2 (g) NOCl2 (g) + NO (g) -> 2NOCl (g) If this mechanism is

*asked on February 6, 2007* -
## math

two cylindrical tanks have the same height, but the radius of one tank equals the diameter of the other. if the volume of the larger is k% more than the volume of the smaller, k= ? a)50 b)100 c)200 d)300 e)400 small tank volume: pi*(r/2)^2*h big tank

*asked on June 23, 2005* -
## calculus help please

A piece of wire 14 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. (a) How much wire should be used for the square in order to maximize the total area? = 14 m (b) How much wire should be

*asked on April 15, 2014* -
## Chemistry

The antifreeze in a car is a 50% by weight solution of ethylene glycol, C2H6O2 in a water solvent. Calculate the boiling point and freezing point of this solution. (For H2O, Kb=0.52 C/m Kf= 1.86 C/m I can't even find the formula for this in my book, please

*asked on January 24, 2013* -
## math

using two fair dice, what is the probability of rolling a sum that exceeds 4?

*asked on March 12, 2012* -
## Algebra 2 Honors

Find the exact value by using an appropriate sum or difference identity. cos(165) degrees

*asked on June 6, 2010* -
## Statistics

A student is taking a multiple-choice exam with 16 questions. Each question has five alternatives. If the student guesses on 12 of the questions, what is the probability she will guess at least 8 correct? Assume all of the alternatives are equally likely

*asked on May 14, 2008* -
## Algebra

I need help with this question: write an equation g(x) for when the parent function f(x) = |x| is translated one unit to the left and two units up, opening downwards, and vertically stretched by a scale factor of 5. Thank you!!!

*asked on December 4, 2017* -
## PHYSICS

a mass of 3kg rests on smooth horizontal table connected by a light string passion over a smooth pulley at the edge of the table to another mass of 2kg hanging vertically. when the system is released from rest with what acceleration do the masses move and

*asked on June 21, 2016* -
## Physics

A satellite is to be put into a circular low earth orbit at 149 km above surface. What orbital speed (km/s) is required?

*asked on November 8, 2012* -
## Engineering Physics

A 4kg box is compress 50 cm on a spring (k=100 N/m) and then slides across a horizontal floor. If (u=0.4) between the box and the floor 1) How much work is done by friction as the box comes to a stop? 2) Assuming the frictional force is constant, how far

*asked on July 8, 2012* -
## meaning

what does the word vagaries mean.Also put a sentence for it

*asked on December 6, 2011* -
## Physics Problem

The portion of string between the bridge and upper end of the fingerboard (the part of the string that is free to vibrate) of a certain musical instrument is 60.0 cm long [.6m] and has a mass of 2.23 g [.00223kg]. The string sounds an A4 note (440 Hz) when

*asked on November 19, 2007* -
## chemistry

Write a net ionic equation for the reaction of the aqueous species ammonia and hydrofluoric acid. I don't think mine is coming out right- I don't know how NH3 reacts with other species, because I end up getting hydrogen as both an anion and a cation in the

*asked on April 29, 2007* -
## oxidation

In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is... ? Fe(II) ==> Fe(III) H2O2 ==> H2O. Fe goes from +2 to +3, that is a loss of electrons, so it is oxidized (by definition,

*asked on April 19, 2007* -
## maths

the angle of elevation of a top of a tree from point P on horizontal ground is 30 degrees.Fromanother point Q 8 METRES FROM THE BASEof the tree,the angle of elevation of the top of the tree is 48 degrees. a)calculate to one decimal place the height of the

*asked on April 21, 2019* -
## Chemistry

In the chemical reaction where N2O4(g) is converted to 2NO2(g), if 0.5 M N2O4 and 0.15 M NO2 are present in the vessel, is the reaction at equilibrium? If not, which direction would the reaction proceed? (Kc = 4.4 × 10-3) N2O4(g) 2NO2(g) a. No, Q = 4.5

*asked on June 13, 2018* -
## Chemistry

What is the solubility of PbI2 in 0.4 M KI given the solubility constant of PbI2 is 7.1 x 10-9 a. 3.5 x 10-3 M b. 1.2 x 10-3 M c. 4.4 x 10-8 M Ksp = 7.1 x 10-9 Ksp = x * (2 * 0.4) (7.1 * 10-9)/.8 = x 8.8 x 10-9 = x ------ But this is not one of the

*asked on June 13, 2018* -
## Chemistry

Which of the following gases would be most likely to experience ideal behavior at high pressures? a. F2 b. Ne c. C2H6 I think the answer is Ne. But I want to make certain. Thanks

*asked on June 13, 2018* -
## Chemistry (Help!)

Reaction: 1/2N2 + 3/2H2 --> NH3 Delta H = -46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ???

*asked on September 24, 2016* -
## Language Arts

Which of the following citations from The Watsons Go to Birmingham---1963 illustrates how the setting affects Byron? A. The way Byron kept his head down and was smiling and saying “Yes, ma’am” this and “No, ma’am” that, it looked like he had

*asked on January 20, 2016* -
## Chemistry

Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O --> __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^- And another one like: Fe2(SO4)3 would look

*asked on October 4, 2015* -
## math

a telephone pole is supported by two cables attached to points on the pole 15 ft above ground and to points on the level ground 8 ft from the foot of the pole. what is the total length of the two cables

*asked on October 13, 2014* -
## MEANING

What is the meaning for vagaries.also give me a sentence for it.

*asked on December 6, 2011* -
## Accounting

I have added Below my balance sheet and income statement now the statement of owners equity is the beginning capital 28,2800 plus the net income 21,550 which is 49,750 less withdrawals 5,000 equals 44,750 which does not equal my assets. I cannot figure out

*asked on October 8, 2011* -
## MATH

In the equation 4*ABCDE= EDCBA each letter represents a different nonzero digit. Determines the sum A+B+C+D+E i don't know how to do this

*asked on May 6, 2011* -
## Physics

The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and

*asked on January 19, 2011* -
## chem

a 6.54 g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. this mixture then reacts with barium chloride to for 3.50 g of silver chloride. calculate the percent by mass of silver nitrate in the first mixture

*asked on December 14, 2010* -
## Chemistry

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 95.0oC and a mass of 67.0 g is dropped into a beaker of water containing 100 g at a temp. of 30.0oC. If the

*asked on October 24, 2010* -
## Chemistry

The percentage composition of chlorine, by mass, in the compound K2PtCl4 is

*asked on August 18, 2010* -
## Algebra 2 Honors

sin 2x(cot x + tan x) = 2 (verify the identity)

*asked on June 6, 2010* -
## Chemistry

Which type of intermolecular forces would be expected in a sample of F2 gas? a. London forces, dipole interactions, and ionic interactions b. dipole interactions c. London forces d. London forces and dipole interactions I believe C is the correct answer.

*asked on June 13, 2018* -
## chemistry

A balloon is filled with hydrogen gas. reaction is Fe(s) + H2SO4(aq) ----> FeSO4(aq) + H2(g). The volume of the ballon was 4800 m cubed and the loss of hydrogen gas during filling was estimated at 20.% What mass of iron splints and 98% by mass H2SO4 were

*asked on April 6, 2017* -
## SS (Social Studies)

I'm working on a social studies project and I really need help on it. The question asks to list three benefits of farming. My benefits are: 1) A stable Lifestyle 2)Stable Food Source 3)A Source For Trading I just need help to create slogans for them!

*asked on November 16, 2016* -
## PHYSICS

A player kicks a ball at an angle of 37degree with the horizontal and with an initial speed of of 48ft/s. A second player standing at a distance of 100ft from the first in the direction of the kick starts running to meet the ball at the instant it is

*asked on May 28, 2016* -
## physics

What are the speed and acceleration (increase/decrease or remain constant) of a ball rolling down a a) straight hill, b) concave hill c) convex hill Can someone explain why they are, not just the answers?

*asked on December 9, 2015* -
## Biology

The LEPR gene that encodes for the leptin receptor protein is approximately 23 kilo base pairs long. The receptor protein consists of 896 amino acids. A man has a mutation in an LEPR allele. Analysis of his DNA sequence for this lepr allele shows that

*asked on October 26, 2015* -
## Physics

A motorcycle rider plans to make a jump off a ramp. If he leaves the ramp with a speed of 38.0m/s and has a speed of 36.3m/s at the top of his trajectory, determine his max height above the end of the ramp. Ignore friction and air resistance. i got 6.45m

*asked on October 25, 2015* -
## physcial science

Picnickers see a lightning flash and hear the resulting thunder 7.9 s later. If the storm is traveling at a rate of 20. km/h, how long, in minutes, do the picnickers have before the storm arrives at their location?

*asked on June 23, 2015* -
## 5th grade Math

A recipe call for the following ingredients: 3c flour 1/2t salt 3/4c sugar 4c fruit 2T butter To make 2/3 of the recipe, how much of each ingredient should you use. Question, should I multiply of divide by 2/3?

*asked on September 20, 2014* -
## Science- Please Help

Is sledding done better when the air temperate is 25 degrees Fahrenheit or 0 degrees Fahrenheit? Why?

*asked on November 1, 2012* -
## math

Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c)

*asked on August 15, 2011* -
## math

A total of 1200 students attend top view high school. The ratio of teachers to students is 1:30. How many teachers are there at the school?

*asked on September 5, 2010* -
## Physics

A bullet with mass 0.40 kg is fired with an initial velocity of 400 m/s from a gun with mass 5.0 kg. The speed of the recoil of the gun is?

*asked on February 27, 2010* -
## Math

A) A rectangle has perimeter 64 cm and area 23 cm^2. Solve the following system of equations to find the rectangle's dimensions. length=23/width length + width = 32 B) Solve the system of equations x^2+y^2=1 xy=0.5

*asked on June 7, 2009* -
## government

in a political party, what is the job of precinct captain?

*asked on February 5, 2009* -
## government

who solves the disputes over issues in congress? the correspondence committe, the committee of conference, or the core committee.

*asked on February 5, 2009* -
## statistics

What is the median in the following set of values? 4, 7, 19, 22, 27, 39, 47

*asked on April 2, 2008* -
## Math

What is the vertical asymptote of the function: f(x)= (X+5)/((X^2)-12X+36)

*asked on February 7, 2008* -
## chem

how many grams of sulfur are needed to react w/ 246 grams of mercury to form HgS? Hg + S ==> HgS unless your instructor insists on writing S as S8, in which case it will be 8Hg + S8 ==> 8HgS. The answer will be the same no matter which way the equation is

*asked on July 16, 2007* -
## pH- part 2

how much .10M Base (in mL) is needed to neutralize 8.00mL of .10M Acid? base- NaOH, acid- HCl, base volume (mL)- ? base- NaOH, acid- HC2H3O2, base volume (mL)- ? VaNa=VbNb Vb= 8ml*.10N/.10N= 8m.

*asked on April 14, 2007* -
## math

a rectangle has a perimeter equal to circumference of a circle of radius 3. if the width of the rectangle is 3, what is the length? a) 3pi-3 b) 4.5pi-3 c)6pi-3 d)9pi-3 e)cannot be determined 3*2*pi=3+3+2x where x=side of rectangle 6pi-6=2x 3pi-3=x

*asked on June 23, 2005* -
## Biology

Some scientists reproduce, or grow, cells in a laboratory setting so they can study the cells for particular reasons. Research different examples of cells being reproduced in a lab. What is the purpose behind doing this? Name two advantages and two

*asked on December 4, 2019* -
## biology

Some scientists reproduce, or grow, cells in a laboratory setting so they can study the cells for particular reasons. Research different examples of cells being reproduced in a lab. What is the purpose behind doing this? Name two advantages and two

*asked on November 13, 2019* -
## Chemistry

You have the following acids and their conjugate bases available: Acetic Acid: CH 3COOH/CH3COO-; Ka = 1.8 × 10-5 Carbonic Acid: H2CO3/HCO3-; Ka = 4.2 × 10-7 Hydrofluoric acid: HF/F-; Ka = 7.2 × 10-4 Which of these acid/conjugate base pairs would be the

*asked on June 13, 2018* -
## Chemistry

If K > 1 at 25°C and 1 atm of pressure, then which statement is true about the reaction's equilibrium? a. There is always more reactant than product at equilibrium under all conditions. b. There is more product than reactant at equilibrium at these

*asked on June 13, 2018* -
## government

what is the separation of powers between the legislative and the executive branch regarding the budget.

*asked on May 12, 2017* -
## Math

The product of my numerator and my denominator is divisible by 2 .my denominator and my numerator differ by 3. My numerator is an even number .my denominator is a prime number.I am:______

*asked on December 6, 2016* -
## Chemistry

Write the balanced equations for the reactions: a) Reduction of Ag+ Ions with metal Fe. b) Oxidation of metal Mg with Cu2+ ion.

*asked on October 18, 2016* -
## CHEMISTRY HELP

Reaction: 1/2N2 + 3/2H2 --> NH3 Delta H = -46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ???

*asked on September 24, 2016* -
## PHYSICS

A ball is dropped onto the floor from a height of 20m. It rebounds to a height of 15m. If the ball was in contact with the floor for 0.01sec what was its average acceleration during the contact take g=10m/s

*asked on May 28, 2016* -
## math

the model of a car is 4 1/8 inches wide. is three inches ok the model represents five feet what is the actual width of the car

*asked on February 1, 2016* -
## physics

two point charges +q and -q are separated by a distance d. aside from infinity, where else is the potential due to these two charges 0?

*asked on November 19, 2015* -
## physics

A truck accelerates uniformly from rest to 21.5m/s in 5.7sec along a level stretch of road. Determine the average power required to accelerate the truck for the following values of the weight (ignore friction) a) 1.00x10^4 N b) 1.45x10^4 N I used constant

*asked on October 26, 2015* -
## geometry

The length of a rectangle is 4 times its width. If the perimeter of the rectangle is 70 ft., find the area.

*asked on October 4, 2015* -
## Chemistry

Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O --> __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^- And another one like: Fe2(SO4)3 would look

*asked on October 4, 2015* -
## Math

The Wildcats basketball team scored 18 points in the first half of the game. All the points came from either 2 or 3 point baskets. If a total of 8 shots were made ( some two pointers and some three points), how many of each type of shot were made?

*asked on September 3, 2015* -
## Chemistry Need Help

How many grams of baking soda, NaHCO3, are needed to react with 125 mL of stomach acid having an HCl concentration of 0.05984 M? The reaction is NaHCO3(aq) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(l). Do I need to chenage mL to L first? I'm really stuck with

*asked on March 1, 2015* -
## Math

Find the radius of a sphere with a volume of 1,767.1 m (3 cubed) would I use the formula V=4/3*pie*radius (3 cubed)

*asked on October 29, 2014* -
## Math

A cylinder has a radius of 5 centimeters and a height of 12 centimeters. What would the height of a cone need to be if it is the same volume and radius?

*asked on October 28, 2014* -
## ENGL essay excerpt edit

can someone edit/ give any feedback on this? Additionally, my essay The Latent Path to Progression demonstrates how creative freedom is necessary in the development of societal contributions that will ultimately lead to its progression. For instance, I

*asked on September 13, 2014* -
## english essay edit

Furthermore, Your Creative Elusive Genius sharply contrasts to John Stuart Mill's Chapter III: Of Individuality as One of the Elements of Well-Being. For instance, Elizabeth Gilbert presents an anecdote of Thomas Waits, who she describes as an anxious and

*asked on August 31, 2014* -
## english- Intro edit

can someone edit this The mere pigment of one’s skin deep makeup has served as the basis for hurtful bias, racism, and other discriminating actions within our society. The racially perceptive film, Do the Right Thing by Spike Lee, exemplifies how

*asked on May 26, 2014* -
## Math

Mohammed had ducks and cows on his farm. These 14 animals had a total of 40 legs. How many each animals did Mohamed have?

*asked on March 24, 2014* -
## Physics

What is the momentum of a 52 kg carton that slides at 5.0m/s across an icy surface?

*asked on March 10, 2014* -
## williams pkwy

how much money must be deposited now @ 6 % interest compounded semi annually to yield an annuity payment of $ 4000 at the end of each six month period for a total of five years

*asked on October 6, 2013*