Monday

August 29, 2016
Total # Posts: 353

**chemistry**

?Fe(2+)+?NO3(-)+H(+)==》No+Fe(3+)+H2O What's the balanced equation?
*August 13, 2016*

**Chemistry**

A 25g piece of an unknown metal alloy at 150 degrees Celsius is dropped into an insulated container with 200 g of ice. Calculate the specific heat capacity of the metal, given that 9.0 g of ice melted. How would you work this out?
*July 5, 2016*

**Spanish**

Can someone who is good at Spanish (or fluent) please proofread these short stories I'm writing for my Spanish class? I am at a borderline grade right now, and if I can get a good grade on this assignment I can get pushed up to an "A". Thank you so much to ...
*May 12, 2016*

**LA**

2. Read the passage. What technique is the author using to develop point of view? "Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge." a. state a claim b. persuasive language c...
*May 1, 2016*

**Language Arts, can anyone check?**

OMG, plz?
*May 1, 2016*

**Language Arts, can anyone check?**

1. Which statement is shared by both "Zoos: Joys or Jails?" and "Why Do We Need Zoos?" a. clearly stated claim b. humorous introduction c. unsupported facts d. one-sided argument 23 Read the passage. What technique is the author using to develop point of ...
*May 1, 2016*

**Math**

Help Please. A wireless phone company offers two plans. In one plan, there is a monthly fee of $40 and a charge of $0.25 per minute. In the other plan, there is monthly fee of $25 and a charge of $0.40 per minute. For what number of minutes are the costs equal?
*April 26, 2016*

**Calculus **

Linear Approximation Function is y=x2 . Take three points, x=2, x=3, x=4. Approximate this function at these three points for a deviation Δx =0.1. Which of the three points does the approximation works best? Which point does it works worst?
*April 4, 2016*

**ELA**

This presentation should consist of 5 Gerund sentences (subject, subject complement, direct object, indirect object, and object of the preposition) 2 participles - (1 with an auxiliary verb and 1 as an adjective) 4 infinitives (subject, direct object, adjective, adverb) - with...
*March 18, 2016*

**Math**

Is this the answer to 3/4% of 75: 0.5625
*January 23, 2016*

**Math**

Oh sorry. That was my answer to my math problem: Name a fraction between 1/4 and 5/16. So was it right
*January 23, 2016*

**Math**

For this question 3/4% of 75 would I change 3/4 to a decimal and put it over 100?
*January 23, 2016*

**Calculus**

Which of the following integrals represents the volume of the solid formed by revolving the region bounded by y=x^3, y=1, and x=2 about the line y=10? a) pi*∫from (8-1) of (10-y)(2-y^(1/3))dy b) pi*∫ from (1-2) of (81-(10-x^3)^2)dx c)2pi*∫from (1-8) of y(2-y...
*January 4, 2016*

**Math**

A football is punted. Its height, H metres is given by the quadratic relation with equation: H = -5t2 + 21t, where t is the time in seconds after the punt. I tried to do this question on a test but I just ran out of time How is the easiest and quickest way to do this? ...
*November 20, 2015*

**Physics**

Beam supported by a rope that can rotate about a hinge. The beam is supported by a rope attached 1.00 meter from the end of the beam. The beam has a mass of 10.0 kg and is 6.00 meters long. The rope makes a 60degree angle. What is the tension in the rope? What is the magnitude...
*November 17, 2015*

**Pre-calculus**

A surveyor standing 62 meters from the base of a building measures the angle to the top of the building and finds it to be 38°. The surveyor then measures the angle to the top of the radio tower on the building and finds that it is 45°. How tall is the tadio tower?
*October 29, 2015*

**algebra**

sket the graph of each linear inequality y<-7/3x+4
*August 19, 2015*

**Calculus - Rate of Change**

Can someone explain how to solve this problem? Sand is being dumped on a conveyor belt onto a pile in such a way that the pile forms in the shape of a cone whose radius is always equal to its height. Assuming that the sand is being dumped at a rate of 10 cubic feet per minute...
*July 29, 2015*

**Calculus**

How do the constants 5, 4, and 12 in f(x) = 5x^2 - 4x + 12, affect the derivative? Thanks!
*July 5, 2015*

**Computer Architecture/Assembly Question - Amdahl's**

Can someone show me how to solve this problem? For a program that is 70% parallelizable, what will be the speedup relative to a uniprocessor from running it on a 4,8, and 16 way multiprocessor assuming perfect load balancing. Thanks!
*June 24, 2015*

**Literacy 2**

which of the following questions should you ask to help determine suitability of a source? A. why was the source not in a database B. Are there any images C. How many pages does the source have D. Who authored the source
*June 19, 2015*

**English**

Select the letter of the term that identifies the function of the phrase in parentheses in the following sentence: One goal is (to see potato-starch food boxes rather than Styrofoam ones). a. adjective e. object of a preposition b. adverb f. direct object c. subject g. ...
*June 12, 2015*

**Algebra 2**

a company plans to sell embroidered hats for $15. the company's financial planner estimates that the cost, y, of manufacturing the hats is a quadratic function with a y-intercept of 7,920 and a vertex of (150, 9,000). what is the minimum number of hats the company must ...
*May 18, 2015*

**Calculus**

Given h(x)=(6x^2+x)/x , find h'(0)
*May 18, 2015*

**Calculus - Derivative**

The curve is given by x^2+2r(sqrt(y))=xy What is dx/dy when r is constant?
*May 8, 2015*

**college precalculus**

thank you
*May 1, 2015*

**college precalculus**

find the sum of the infinite geometric series 1/3^6+1/3^8+1/3^10+1/3^12........ -100/9+10/3-1+3/10
*May 1, 2015*

**basic programming principles**

Select case marCode case “S” display “Single” case “D” display “Divorced” case “M” display “Married” case “W” display “Widowed” case else display ”Incorrect” endselect
*March 31, 2015*

**math**

For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i dont know how to find for each of the points
*March 26, 2015*

**Calc**

Find the linearization of f(x)=cos(x)-sin(2x) at x = 0.
*November 30, 2014*

**Chemisty**

5E6/2260=2.21g then converted 2.21g to 0.00221L 0.00221X958.4= 2.119064
*November 7, 2014*

**Chemisty**

I mean 958.4 kg/m3 from 100°C
*November 7, 2014*

**Chemisty**

water density is 0.9584 L from 100°C
*November 7, 2014*

**Chemisty**

So the mass H20 would be 5E6/2260 X 2260 = 5E6 grams?
*November 7, 2014*

**Chemisty**

Would I need to multiply this to get the mass? (2.26*10^6)(5*10^6)
*November 7, 2014*

**Chemisty**

How many litres of water at 100°C are vaporized by the addition of 5.00 MJ of heat
*November 7, 2014*

**matter and energy**

so is the answer 316 joules?
*October 1, 2014*

**matter and energy**

thanks dr.bob
*October 1, 2014*

** matter and energy**

how much heat must be added to 5.0 g of solid lead at 30 degrees celcius to convert it to liquid lead at the melting point?
*October 1, 2014*

**PhysicsI**

A puddle holds 150 g of water. If 0.50 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)
*July 24, 2014*

**PhysicsI**

A windowpane is half a centimeter thick and has an area of 1.0 m2. The temperature difference between the inside and outside surfaces of the pane is 15° C. What is the rate of heat flow through this window? (Thermal conductivity for glass is 0.84 J/s×m×°C.)
*July 24, 2014*

**Algebra**

25% DECREASE
*July 11, 2014*

**math**

If 1/8" = 30' how many fractions of an inch is 24'
*July 3, 2014*

**jacksonville**

2NBr3+63NaOH--->N2+3NaBr+3hobr
*April 10, 2014*

**PHYSICS(HELP)**

I obtained: a) 0.86 atm b) 5503.4 Pa c) 7% But all are wrong and I don't know why!!! And I have only one submission more. Please help!!!
*January 12, 2014*

**Physics Classical Mechanics Help ASAP**

Thanks a lot!!!
*January 10, 2014*

**Physics Classical Mechanics Help ASAP**

Greco, thanks a lot!! I obtained this results for the problem above. a) 0.26 b) 54715.5 c) I am not sure
*January 10, 2014*

**Physics Classical Mechanics Help ASAP**

If you have a) you only need to rest from b) ..... but I am continue suffering with a) did you replace all the values without converting to other unid system???
*January 10, 2014*

**Physics Classical Mechanics Help ASAP**

Thanks a lot abc, and what about a) and b) I did it again and now I obtained a)0.83 atm b)3061.5 Pa But it's my last chance and I am not sure......
*January 10, 2014*

**Physics Classical Mechanics Help ASAP**

I obtained: a) 0.86 atm b) 5503.4 Pa c) 7% But all are wrong and I don't know why!!! And I have only one submission more. Please help!!!
*January 10, 2014*

**Physics Classical Mechanics Help ASAP**

Please help with this exercise, is the only one that I need......please.
*January 10, 2014*

**calculus hw**

so it should be 5/12+8/3=37/12?
*December 15, 2013*

**calculus hw**

What is the area bounded by y=x^2 and y=x^3-2x?
*December 15, 2013*

**science**

What can be inferred after performing the experiments in the Atomic Theory lab?
*November 14, 2013*

**Chemistry**

What molecular formula can you deduce from a mass spectrometry of 156 m/z. And how do you get that formula? Steps on how to get the formula is much appreciated! Thanks!
*November 12, 2013*

**Mathjc**

b(A+a)
*November 2, 2013*

**Statistics**

Which is true about a 99% confidence interval for a population proportion based on a given sample? I. We are 99% confident that the population proportion is in our interval. II. There is a 99% chance that our interval contains the sample proportion. III. The interval is wider ...
*October 28, 2013*

**Math**

Thanks so much #yolo
*October 27, 2013*

**Math**

How did you do it? :)
*October 27, 2013*

**Math**

How do I convert this decimal into a fraction? 3.083 (The last 3 is repeating by itself)
*October 27, 2013*

**Chemistry**

Thanks, but for the first one, I thought it'd be no reaction since they are both metals. Is it possible for Ca and Al to react with each other?
*October 21, 2013*

**Chemistry**

What kind of reaction is this (redox, precipitation, acid-base, or complex ion formation reaction)? 1. 3 Ca(s) + 2 Al^3+(aq) -> 3 Ca^2+(aq) + 2 Al(s) 2. LiHCO3(s) + heat -> Li2CO3(s) + CO2(g) + H2O(g) Complete the reaction: Ni(s) + 2 Na^+(aq) -> ?
*October 21, 2013*

**quantum physics**

all are struck with 8d you need 3a?
*October 18, 2013*

**Chemistry**

Need help with coming up with a extraction flow scheme for separating the compounds in this mixture: aniline, p-anisic acid, octanol, and NaCl Thanks!
*September 17, 2013*

**MATH 117**

What is the greatest common factor (HINT: It may help for you to show an example of how to find a greatest common factor)? How do you know when you have found the greatest one?
*July 16, 2013*

**physics**

An automatic dryer spins wet clothes at an angular speed of 4.4 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 4.2 rad/s2. How long does it take the dryer to come up to speed?
*July 16, 2013*

**math**

the trip took 2 hours longer to cover the 160 miles than it took to come back. if the total time of the round trip was 6 hours, what was the rate going and what was the rate coming back?
*July 13, 2013*

**Finance**

A firm with 50% debt to equity ratio has a cost of equity capital of 15%, a cost of debt of 9% and a tax rate of 33%. The firm is considering a project costing 5,000 that will generate an annual cash flow of 1,000 for the next 8 years. What is the projects NPV?
*June 30, 2013*

**Math Trig Find Quadrant I II III IV**

Hello, i cant find out the values of x1,x2 can u help me please? sinx=2sinx+1 0=sinx+1 sinx=-1 <0 (III;IV) sinx=270* x1= ? x2= ?
*June 8, 2013*

**Chemistry**

what is the molarity of 28.9 g of cacl2 dissolved in water to make 0.78 l of solution
*May 25, 2013*

**phy**

A popular brand of pressure washer claims to deliver 330 litres per hour of water at a pressure of 80 bar, drawing 1400 W of electrical power in the process. Pressure washers of this type consist of an electric motor that drives a small compressor to pressurize water fed into ...
*May 11, 2013*

**Physics**

A van drive 17.5km north. Then it turns west and drives 9.1km. The van then drives 14.5km south. The entire trip takes 40 minutes. What is the average velocity of the truck? I know avg velocity is displacement/time elasped, but I can not figure out what the displacement it.......
*April 24, 2013*

**MATHS**

$169.50
*March 17, 2013*

**MATHS**

PAT FAMILY HAS 7 MEMBERS. EACH MEMBER SPENDS $10.00 TO ENTER A CINEMA.THEY MET 3 FRIENDS AND BOUGHT LUNCH FOR EVERYONE AT 9.95 EACH.CALCULATE THEIR TOTAL BILL.
*March 17, 2013*

**MATHS**

thanks anyway
*March 17, 2013*

**MATHS**

ms.sue can you practice me in maths for s.e.a like give me sites to do test then you will correct when i post the answers
*March 17, 2013*

**Reading**

Is these answers correct? devoid intimidate jeopardize sneer implore introvert sibling vivacious infuriate smug 1-2. The people I love best can __ me the most. No one can make me as angry as my parents and __s can. 3-4. Please don't __ me to help you with your term paper. ...
*March 12, 2013*

**math**

A telephone pole is 55 feet tall. Jeri stands in the shadow of the pole. She is 66 inches tall, gut her shadow is 12 feet long. How far away from the telephone pole is she standing?
*March 6, 2013*

**math**

Malcom designed the roof plan of a house and implement shed. The dimensions of the house's roof are 25 ft wide by 40 long. The length of the shed's roof is 140 feet. If the two shapes are similar, what is the width of the shed's roof?
*March 6, 2013*

**Reading**

thanks
*February 27, 2013*

**Reading**

Is these answers correct? condone, pathetic, feign, precedent, comtemplate gape furtive feasible, fiscal, punitive 1-2. "Would it be__ for us to buy a new copy machine?" Hal asked at the office budget meeting. The boss replied, "Unfortunately, our __situation is...
*February 27, 2013*

**Reading**

thank you
*February 27, 2013*

**Reading**

Is these answers correct? devoid infuriate jeopardize smug implore intimidate sibling sneer introvert vivacious 1-2. The people I love best can __me the most. No one can make me as angry as my parents and__s can. I guess close relationships are conducive to strong feelings, ...
*February 27, 2013*

**Physics**

A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron?
*February 3, 2013*

**Physics**

A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron? Thanks for helping me out
*February 2, 2013*

**Physics**

A circular loop with 30 turns and area of 0.25 m2 rotates at 100 rad/s. The axis of rotation of the loop is perpendicular to the direction of the magnetic field of 0.04 Tesla. What is the maximum emf induced in the loop?
*February 2, 2013*

**Physics**

A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100 m/s. What is the force experienced by the proton if it enters parallel to the direction of the magnetic field with a speed of 200 m/s?
*February 2, 2013*

**Physics**

A conductor of length 2m carrying a 1.5A current experiences a force of 2.2 N. What is the magnitude of the magnetic field that acts perpendicular to the flow of current in the conductor?
*February 2, 2013*

**algebra**

approximately how far can bobby drivein 2,3,4,and 5 hours
*January 21, 2013*

**chemistry**

At elevated temperatures, sodium chlorate decomposes to produce sodium chloride and oxygen gas. A 0.8915-g sample of impure sodium chlorate was heated until the production of oxygen gas ceased. The oxygen gas collected over water occupied 57.2 mL at a temperature of 22°C ...
*November 20, 2012*

**Statistics**

The number of arrivals per period is distributed according to the poisson with the expected value of 0.75 unit per period. the cost of waiting per unit per period is $3.20. The facility cost for serving one unit per period is $5.15. What expected service rate should be ...
*November 17, 2012*

**Chemistry**

A solution is 0.10M Pb(NO3)2 and 0.10M AgNO3. If solid NaCl is added to the solution what is [Ag+] when PbCl2 begins to precipitate? (Ksp PbCl2 = 1.7 x 10^-5; AgCl = 1.8 x 10^-10) The answers is 1.4 x 10^-8 How do I find the answer
*October 14, 2012*

**Chemistry**

Molarity of NaOH solution = 0.06115 Volume of NaOH used = 15.50 mL Volume of unknown Sample = 10.00 mL Find the Moles of NaOH used? Find the molarity of H3PO4? Thanks!
*October 10, 2012*

**lit**

in "A Pair of Silk Stockings" the silk stockings are a symbol of what?
*October 3, 2012*

**Math**

find the total number of square units the patio will cover if the width is 4,5,6,or 7 units
*September 17, 2012*

**Chemistry**

For solution 1, 4.00mL of 0.0200 M Cr(NO)3 was added to 20.00ml of 0.0200 M Na2H2EDTA, then the a time and absorbance were taken every 5 mins. If at 5:00 min the absorbance was 0.039 how do I find [Cr3+]0, [CrEDTA-]t, and [Cr3+]t. The absorbance at 0:00 mins was 0.039 if it is...
*September 17, 2012*

**biology**

One in every 685 children born in the chicoutimi area of quebec province has tyrosinemia. It is cause by having two copies of the receissive allele. Under the assumptions of Hardy-Weinberg equilibrium, calculate the value of q required to produce this proportion of afflicted ...
*September 11, 2012*

**lang arts**

i dontknow help
*September 5, 2012*

**math**

Mr burr the head custodian is working on putting new numbers on 42 of the 81 classroom doors. He found two numbers for the 23rd door he was working on in the 6th grade hallway whose sum is 35 and their product is 306. What are the two numbers?
*September 4, 2012*