# Posts by Alice

Total # Posts: 707

**AP chem**

Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H an explanation/step by step would be nice because i keep getting wrong answer from the H+ & H2O (they are both suppose to be 12 according to the answer key ...

*March 26, 2017*

**Physics**

A square-shaped loop carries current I. What is the magnitude and the direction of the magnetic field at point P, which is located on the bottom segment of the loop? Each side of the square loop has length d. The answer should be given in terms of d, I, pi, and the ...

*March 22, 2017*

**Maths**

The scale on a map is 1:200 000. Work out the number of kilometres represented by 2.5 cm on the map. I've never done a question like this before. If you can help I would be really grateful.

*March 4, 2017*

**Calc **

Use a comparison test to determine if the integral from 8 to infinity of sin^10(x)e^(-x) converges or diverges? I am stuck on what to use to compare. Any help is appreciated! Thank you! I was thinking -1<sin<1 but then I get 1<sin^10<1 which makes no sense

*February 27, 2017*

**Math**

The fruit plants in my garden do not bear fruit during their first summer. The fruits are picked for the next two years and then the plants become too woody and need to be pulled up. Occasionally some of the die over winter. The last five years I had fruit on the following ...

*February 20, 2017*

**Math**

The fruit plants in my garden do not bear fruit during their first summer. The fruits are picked for the next two years and then the plants become too woody and need to be pulled up. Occasionally some of the die over winter. The last five years I had fruit on the following ...

*February 20, 2017*

**Math**

Find the fifth term in the expansion of (4-1/5x)^9 in ascending powers of x

*February 9, 2017*

**Aice Math**

The binomial expansion of (5-x/2)^6 is 15625 + px+qx^2+... Find the value of "p" and the value of "q"

*February 9, 2017*

**Math**

In the expansion of (x^2-b/x)^4, the coefficient of x^2 is 294. Find the value of the constant "b"

*February 9, 2017*

**Calc **

The base of a solid is the unit circle x^2 + y^2 = 4, and its cross-sections perpendicular to the x-axis are rectangles of height 10. Find its volume. Here's my work: A for rectangle=lw A=10*sq(4-x) V= the integral from -4 to 4 of sq(4-x^2)*10dx But that gets me 0, so I ...

*February 1, 2017*

**Algebra**

This is the problem for arithmetic sequences and series: Moshe would like to get tickets for President Justin Bieber's inauguration. It will take him 20 years. He decides to pay $200 the first year and then increase his payment by $60 each year. a) How much did he pay in ...

*January 26, 2017*

**Algebra**

Moshe would like to get tickets for President inauguration. It will take him 20 years. He decides to pay $200 the first year and the increase his payment by $60 each year. a) How much did he pay in the last year? b) How much did he pay altogether for the tickets?

*January 26, 2017*

**Algebra**

Scholmo reads 7 pages of his book on the first day and his rate of reading then goes up by 3 pages each day. a) How many pages will he have read on the 8th day? b) After how many days will he have read more than 425 pages?

*January 26, 2017*

**Algebra**

The answers will be correct?

*January 24, 2017*

**Algebra**

Factor each: f(x)= x^3 + 7x^2 + 10x f(x)= 5x^3 -19x^2 - 4x

*January 24, 2017*

**Math**

Mary has a third of the money Erin has. Erin has $8 less than John. Together they have $267. How much money does each of them have?

*January 10, 2017*

**Physics**

Capacitor c1 and c2 are 4f and 2f respectively are charged as series combination across 100v battery. The two capacitors are disconnected from each other.They are connected +ve plate to +ve plate and -ve plate to -ve plate.calculate the resulting charge on each capacitor

*December 24, 2016*

**math**

four times a number plus three times the sum of a number and four is equal to negative nine

*December 5, 2016*

**precalculus**

Can you please check these answers. In exercises 10-13 , find (a)2v+u, (b)u-3v), and (c)5u-v. 10.u=<0,-4>, v=<-2,-8> a) 2v+u = <-4,-16) + <0,-4) = <-4, -20> b,u-3v =<0,-4>- <-6,-24> =<6,20> c) 5u - v = <0,-20> - <-2,-8) = <...

*November 26, 2016*

**precalculus**

Is this correct if not could you explain how to make it correct? find (a)2v+u, (b)u-3v), and (c)5u-v. u=i-j v=6i+9i a. 2v+u u=i-j, v=6i+9i =(12i+18j) + (i-j) =13i+ 17j b. u-3v (i-j)-(18i+27i) -17i - -26j c. 5u-v (5i-5j)-(30i+54j) -25i - -59j

*November 26, 2016*

**Spanish Linguistics**

Explique la ambigüedad y dibuje los diagramas correspondientes a cada posible interpretación de cada oración. 1.Juan trajo un mapa de Italia. 2.Un hombre alto golpeo a una mujer con un bolso.

*November 7, 2016*

**Organic Chemistry 2**

The typical % yield for the reduction of 9-fluorenone using NaBH4 to obtain 9-fluorenol is 80%. In my experiment I obtained 89 %. Can you explain the reasons why my yield is higher? Is it better to obtain a higher yield or a lower yield than the expected one?

*October 27, 2016*

**Math**

so 104 is correct?

*October 22, 2016*

**Math**

I got 104 feet by subtracting

*October 22, 2016*

**Math**

What is the distance between 86.25 to -17.75

*October 22, 2016*

**math**

I got -2 2/3

*October 22, 2016*

**math**

i got 16 2/3

*October 22, 2016*

**math**

Fishing hook G is let down 2 1/2 times its present depth. where is fishing hook G now? FISHING HOOK G = -6 2/3

*October 22, 2016*

**math**

Fishing hook E is dropped 2.5 times its present depth. where is fishing hook E now? NOTE: FISHING HOOK E is -7.1 is the answer -4.14 or -17.75

*October 22, 2016*

**Math**

9. A grocer wants to mix a type of spice which costs £22 per kilogram with another type which costs £12 per kilogram, to obtain 20 kilograms of mixture which will cost £15 per kilogram. What quantity of each spice must the grocer take?

*October 21, 2016*

**English**

I agree with writeacher

*October 20, 2016*

**social studies**

my teacher said any morals a person would have

*October 15, 2016*

**social studies**

Did Christopher Columbus's' efforts to gain power and wealth compromise his morals?

*October 15, 2016*

**Spanish Linguistics**

That's fine. I would appreciate any help because I am so frustrated and lost and I don't understand. I don't know if I should do a table like this: pierd perd indicativo-presente yo [pier-do] presente f nos f d [perd-emos] or a table like this: pierd perd [pier-do...

*October 12, 2016*

**Spanish Linguistics**

La distribución de los alomorfos de la raíz del verbo perder esta condicionada fonológicamente. ?En qué contexto fonológico ocurre cada uno de los alomorfos? Para responder...haga una lista de formas verbales, en dos columnas según el ...

*October 12, 2016*

**biomechanics**

A cyclist is coasting up a hill. At t=0, the cyclist has a velocity of 14.27 m/s. If the acceleration of the cyclist is constant at -1.67 m/s2, how long will it take the cyclist to come to a complete stop? If the peak of the hill is 40 m away from the cyclist at t=0, will she...

*September 21, 2016*

**Psychology**

A man has cheated on his wife and he feels very guilty, but soon he begins to make excuses, saying how his wife has nagged him for years. The defense mechanism that BEST explains his behavior is: A) rationalization B) denial C) regression D) projection I believe the answer may...

*September 20, 2016*

**math**

A four-cylinder engine has a bore of 90mm and a stroke of 100mm. The clearance volume of each cylinder is 0.065 L. Assuming compression starts at the bottom of the stroke, determine: (a) the capacity of the engine (b) the compression ratio of the engine

*September 13, 2016*

**Calculus**

Evaluate using tabular method: integral e^(2x)cos3xdx

*September 1, 2016*

**algebra**

Room carpet 120 ft wide & 1440 inches long at $2per sq yard. How much is

*August 30, 2016*

**Chemistry**

What are the equilibrium concentrations of all the solute species in a 0.95 M solution of hydrogen cyanide, HCN? The Ka value = 6.2 x 10^-10. (a) [H3O+], M; (b) [OH-], M; (c) [HCN], M; (d) What is the pH of the solution? For HCN So far i have calculated the concentration of ...

*August 14, 2016*

**math**

to determine whether a person has as thyroid deficiency, a radioactive iodine with a half-life of 8.2 days is injected into the bloodstream. a healthy thyroid is able to absorb all of the radioactivity. the amount, R, of radioactivity present after t days can be modeled by the...

*May 31, 2016*

**social studies**

what are three advantages of visiting the city-state of sparta (cultural activities, recreation, athletics, sports, architecture, and famous sites) What are 2 travel alerts that warn tourist some the dangers they might encounter while staying in sparta PS: This is ancient sparta

*May 17, 2016*

**Math**

A banner is shaped like a parrelelogram. The banner has a base length of 3.25 meters and an area of 4.55 square meters. Explain how to find the height of the banner

*May 17, 2016*

**Social studies**

What are 3 advantages of visiting the city state of Sparta What are 2 travel alerts in Sparta (in ancient times)

*May 17, 2016*

**Chemistry**

How do you transform an alcohol into an alkene? The example I need help with is: What are the reagents to transform 1,2-dimethyl-propanol to 4,5-dimethyl-2-hexene? This must be done in two steps.

*May 7, 2016*

**Chemistry**

What are the possible reagents needs to transform 1-butene to 2-butene? This can be done in two steps.

*May 7, 2016*

**Math**

I'm a fraction that is equivalent to 1/2 my sum of numerador and denominator is 15 what fraction I'm?

*April 28, 2016*

**macroeconomics**

11 - 7. (Fiscal Policy) Increased government purchases, with taxes held constant, can eliminate a recessionary gap. How could a tax cut achieve the same result?

*April 26, 2016*

**Calculus**

The Riemann sum s for f(x)=4x^2, 0<=x<=1, taking the sample points to be the right endpoints is given by s=4n^2+6n+2/3n^2. True or False?

*April 19, 2016*

**Calculus (Urgent, please)**

Find the area of the region enclosed by the intersection of the circle x^2+y^2=4 and the parabola y=x^2. Show work

*April 19, 2016*

**Calculus**

Use the function f to solve the following: a) Local minima, local maxima, and stationary points if any. Show work. b)Intervals of upward concavity and downward concavity if any. Show work. c) Inflection points if any. Show work. f(x)=2x+1/x-2 Please, don't do steps for ...

*March 29, 2016*

**Chemistry**

Or would it be q system = - (q water + q calorimeter) ????

*March 28, 2016*

**Chemistry**

We're doing a spontentaity lab in chemistry and I wanted to make sure I was using the right equation to do the questions! Could someone make sure this is right?? q system = - (q water - q calorimeter)

*March 28, 2016*

**Equilibrium Consentration**

At a certain temperature, the reaction H2(g)+ Cl(g)=2HCl(g)has Kc = 5 x 10^8. If a reaction mixture at equilibrium contains 0.48 M of H2 and 0.23 M of Cl2, what is the concentration of HCl? I was wondering if I had to rearrange the equilibrium constant equation to work out the...

*March 28, 2016*

**Calculus**

Determine whether the hypotheses of the Intermediate-Value Theorem are satisfied. f(x)=x^1/3 , [a,b]=[-1,1] Please, explain. Thank you.

*March 28, 2016*

**electronics**

how to compute charging and discharging time of capacitor in voltage to frequency converters.

*March 27, 2016*

**Chemistry**

How many grams of ammonia (NH3) will be produced when 0.281 grams of nitrogen are combined with hydrogen?

*March 23, 2016*

**C programming**

1.write a C program to reverse the elements of array using recursive function(without using for and while loop). 2. write a C program to check the occurrence of an element in array using recursive function(without using for and while loop)

*March 15, 2016*

**coding**

1.write a C program to reverse the elements of array using recursive function(without using for and while loop). 2. write a C program to check the occurrence of an element in array using recursive function(without using for and while loop).

*March 15, 2016*

**Climate Physics**

Find the insolation in Wm^-2 at summer solstice for a low obliquity of 22 degrees? I used the following: h_0=cos^-1(-tan(phi)* tan(delta)) cos(theta)=[sin(phi)*sin(delta)+cos(phi)*cos(delta)*cos(h_0)] Result was 397 Wm^-2 This looked like an easy problem, but I am having ...

*March 5, 2016*

**Science**

Yes you are correct!

*March 2, 2016*

**electronics**

Full Wave Rectifier With Zener Regulator : what is the maximum load current the zener regulator can supply? given that Iz(min)=5mA(current through zener diode) and the maximum power dissipation in the zener is (1/2)W.

*February 20, 2016*

**electronics**

1. if the peak amplitudes of waves in case of full wave rectifier are not equal, what could be the reason? 2. in case of full wave rectifier with zener diode why does poor regulation of some I(current through the load resistance) occur?

*February 20, 2016*

**Earth science**

Shygirl and Ms. Sue are correct...

*February 19, 2016*

**maths**

Let (xk) ⊂ Rn and x ∈ Rn: Show that xk → x in Rn if and only if for every y ∈ Rn the sequence (⟨xk; y⟩) ⊂ R converges to ⟨x; y⟩, that is, ⟨xk; y⟩ → ⟨x; y⟩ in R.

*February 14, 2016*

**Math HELP PLZZ!!**

thanks

*February 10, 2016*

**programming**

write a C function which takes a natural number as argument and calculates the product of sum of its digits. A sum-product number is natural number that equals the product of sum of its digits and the product of digits.

*February 9, 2016*

**programming**

write a C function which takes natural number nas argument and calculate the sum of the digits raised to the power of the number of digits in n.

*February 9, 2016*

**Math**

A girl has $3.35 in her pocket, consisting of dimes and quarters. If there are 23 coins in all, how many of each does she have?

*February 4, 2016*

**biology**

1.Why do Bacteria and yeast synthesize fatty acids with more cis-double bonds when surrounding temperature drops? 2.Despite fluidity of bilayer, why do liposomes not fuse spontaneously with one another?

*January 30, 2016*

**english**

Which phrase is italicized?

*January 26, 2016*

**Chemistry**

Okay so, the average k-value(temperature) for a group of heavy gas species is 6.78 and the average k-value for a group of light gas species is 6.17 Then there's that question.

*January 26, 2016*

**Chemistry**

How does the molecular wight of the gas affect the k-value?

*January 26, 2016*

**Calculus**

(3) Suppose that f : R2 → R is a continuous function at x0 ∈ R2 and that |f(x0)| > 2. Show that there is a $ > 0 such that |f(x)| > 2 whenever ||x − x0|| < $.

*January 17, 2016*

**Biology/Chemistry**

Does anybody know how much 1 mole of acid should be diluted in order to mimic the pH of acid rain? I also need sources, but haven't been successful in any of my searches so far, thanks.

*January 6, 2016*

**Algebra**

the correct answer is 20 miles per hour. I just answered 40 and it counted it wrong and said it was 20. Good luck

*December 14, 2015*

**Social Studies and Science**

Why is water warmer in colder weather than in warmer weather? Thanks!

*December 9, 2015*

**Math**

Megan completes most puzzles in 24 minutes. Hassan completes most puzzles in 16 minutes. If Megan and Hassan complete a puzzle together, how long will it take?

*December 8, 2015*

**Physics**

A gardener waters a lawn. the hose ejects 5*10^-4 m^3 of water per second. The area of the mouth of the hose is 5 cm^2. Find the backward force exerted on the gardener.[density of water=10^3kg/m^3]

*November 14, 2015*

**Physics**

A railroad freight car with a mass of 50,000 kg is rolling along a level track at 0.30 m/s. A rope trails behind it. If the maximum force you could apply to stop the cart is 250 N, what is the shortest amount of time (measured in seconds) it would take for you to bring it to ...

*October 23, 2015*

**chemistry**

If the titre value of the experiment were 20.50, 22.45, 22.6, typical experiment in a laboratory, 4.50g of sulphuric acid in 250cm^3 of water was titrated with an impure solution of 5.24g of sodium hydroxide contained in 1dm^3.

*October 20, 2015*

**English**

Word bank Coerco Intervene I. 1) I looked forward to this arrival with __. (n) 2.) Take raincoats if you __ bad weather. (v) 3.) They used ___ to get answers. (n) II. 1.) Hire some more people to ___ the work. (v) 2.) Can be done ___ if we had more workers. (adv)

*September 20, 2015*

**Medical**

True or False There's no cure for ALS

*September 20, 2015*

**sfx**

The dependent variable is the same amount of lime water, the independent variable is the colour changer of the lime water. The variable is the mouthpieces used

*August 23, 2015*

**Urgent math pls**

The noise from a power mower was measured at 108 dB. The noise level at a rock concert was measured at 119 dB. Find the ratio of the intensity of the rock music to that of the power mower. (Round your answer to the nearest whole number.) I tried by 108-119 =-11 but then I did ...

*August 11, 2015*

**Urgent math quick**

A roasted turkey is taken from an oven when its temperature has reached 185°F and is placed on a table in a room where the temperature is 75°F. (a) If the temperature of the turkey is 150°F after half an hour, what is its temperature after 45 min? (Round your ...

*August 11, 2015*

**please help urgent**

Find the total amount to be paid over the life of the 30-year mortgage and on the 15-year mortgage. 30-year $ 15-year I also tried doing the same method this way but it didn't work? can you show me how?

*August 10, 2015*

**please help urgent**

I got 2823.82 is this correct?

*August 10, 2015*

**Math**

an = 3a(n − 1) + 6 and a1 = 1 a4=87 a5=249 this is what I got but the answer were incorrect in the sequence.

*August 10, 2015*

**Math**

so I was trying to do this based on logarithm scales. The noise from a power mower was measured at 108 dB. The noise level at a rock concert was measured at 119 dB. Find the ratio of the intensity of the rock music to that of the power mower. (Round your answer to the nearest ...

*August 10, 2015*

**Math**

so just to clarify the answer is 37.313 or 9.3? if i was to round to two decimal places

*August 10, 2015*

**Math**

Can anybody show me step by step pls? A man invests $3000 in an account that pays 7.5% interest per year, compounded quarterly. 1. Find the amount after 3 years? (Round your answer to the nearest cent.) how much $? 2. How long will it take for the investment to double? (Round ...

*August 10, 2015*

**physics**

How many grams of Al2O3 are formed from 15L of O2 at 97.5kPa and at 21degree celcius.

*August 7, 2015*

**physics**

A gas at 250K and 15atm has a molar volume smaller than calculated from perfect gas law Calculate: a) the compression factor under these conditions b) the molar volume of gas

*August 7, 2015*

**Maths Lit, Accounting, Economics, Business Studies**

yes you can

*August 5, 2015*

**History**

Which view of the Establishment Clause would allow greater interplay between government and religion? A. conscientious theory B.accommodationist view C.separationist view D.high-wall theory can any body help me i think its A. conscientious theory but not sure at all.

*July 31, 2015*

**Trigonometry**

Two ships leave a harbor entrance at the same time. The first ship is traveling at a constant 10 miles per hour, while the second is traveling at a constant 22 miles per hour. If the angle between their courses is 100°, how far apart are they after 2 hours? (Round your ...

*July 30, 2015*

**History**

Who was primarily responsible for drafting the Bill of Rights? A.Thomas Jefferson B. Thomas Paine C.James Madison D.Benjamin Franklin

*July 23, 2015*

**History**

The right to a fair trial in federal cases stems from what constitutional source? A. The Sixth Amendment Speedy Trial Clause B.The Fifth Amendment Just Hearing Clause C. The Fourth Amendment Speedy Trial Clause D. The Fifth Amendment Due Process Clause i am struck

*July 23, 2015*