Saturday

December 10, 2016
Total # Posts: 1,809

**chemistry**

What volume of 2.25\it M \rm HCl in liters is needed to react completely (with nothing left over) with 0.750L of 0.200\it M \rm Na_2CO_3?

*April 7, 2013*

**math**

what is 25.515 rounded to the nearest cent?

*April 5, 2013*

**physics**

a cannon with a mass of 1200 kilograms is positioned at the edge of a cliff where it fires a 100 kilogram cannonball horizontally. The cannonballs initial speed is 35 meters per second. What is the recoil of speed of the cannon.

*April 4, 2013*

**SCIENCE 8R - HELP!**

...G.....g G..GG...Gg g..Gg...gg G - Blue g - Black G - Dominant g - recessive Homozygous - ????????? Heterozygous - ??????? Please help ..... I need to find the percentage of Homozygous and Heterozygous and find which on is Homozygous and Heterozygous! (I have to make up a ...

*March 31, 2013*

**lit**

what are the symbols of the story tuesday siesta?

*March 26, 2013*

**Lit**

THANK YOU!

*March 25, 2013*

**Lit**

oh! and can u define what characterization is?

*March 25, 2013*

**Lit**

what is the style of the book tuesday siesta? thanks!

*March 25, 2013*

**statistics**

Are Chicken based dishes more populat than Pizza to a level which is statistically significant at the 95% confidence level? What figures do i have to look at to work it out? Thanks

*March 25, 2013*

**geometry**

From point Q on circle P, an arc is drawn that contains P. Find the measure of the arc AQB that is cut off.

*March 14, 2013*

**Physics**

Electrons are accelerated to reach a kinetic energy of 250 eV (= 4.0 x 10-17 J). If the acceleration is done in a distance of 0.20 m, what is the magnitude of the electric field causing the acceleration?

*March 12, 2013*

**physical**

Hey everyone... hoping I can get an answer soon... I have a PD/H/PE homework assignment on which we have to create an collage on Physical, Spiritual, Emotional, Social and Mental health. I am stuck on a definition for spiritual health, me not being a very big know-it-all in PD...

*March 5, 2013*

**SCIENCE 8 PLEASE HELP!!!!!! (ASAP!)**

THANK YOU! :)

*March 4, 2013*

**Pre Calculus**

A contractor is to fence off a rectangular field along a straight river, the side along the river requiring no fence. What is the least amount of fencing needed to fence of 30,000 meters squared?

*March 4, 2013*

**ALGERBRA_HELP_ASAP**

.I need to find a rule for .the inputs: 1,2,3,4 and the outputs:3,9,18,30. Please Help! Thanks

*February 19, 2013*

** Physics !**

Paul pulls a stalled car with a rope 493-m with a force of 267-N, calculate the powered generated by Paul after 9 minutes pulling it down the road.

*February 18, 2013*

**Science 8R - help....!!!!**

THANK YOU! :)

*February 13, 2013*

**Science 8R - help....!!!!**

What happens during a solar and a lunor eclipse?

*February 13, 2013*

**Chemistry**

The freezing point of ethanol is -114.6 C and its Kf value is 2.00 C/m. What is the freezing point for the solution prepared by dissolving 50.0 g of glycerin (C3H8O3) in 200.0 g ethanol? I used Change in temp=Kfm kf=2.00 I calculated m to be 2.1736. I ended up the answer of -...

*February 13, 2013*

**Math**

Which binomial is a factor of f(x) = x^4 27x^2 14x + 120? (x 4) (x 2) (x + 5) (x + 6)

*February 5, 2013*

**Math 8R - HELP! (PLZ!)**

can someone please help me because I'm really have a hard time with my homework. I understand some it but .... some problems are in different forms... and I looked in my notes (actually we don't have any notes JUST EXAMPLES! :( ) and..... omg it's hard please ...

*January 31, 2013*

**Math 8R - HELP!**

2x + 3y = 6 4x + 6y = 12 please help (I DO NOT want to discuss the other problem...)

*January 31, 2013*

**English 8R - help!**

Have anyone watch "Forrest Gump"? (please answer this question...I need help with something)

*January 31, 2013*

**Math 8R - HELP!**

5x + 2y(0-y) = -3 don't you minus 2y on both sides (under -y)????

*January 31, 2013*

**Math 8R - HELP!**

bobpursley is a teacher on jiskha hw help

*January 31, 2013*

**Math 8R - HELP!**

i got -0.6.... i don't think that's the answer for x... I'm solving for x and then I have to su solve for y

*January 31, 2013*

**Math 8R - HELP!**

yes you don't have to give me the answer I just wanted you to write it out so that I can understand and figure out the answer myself.

*January 31, 2013*

**Math 8R - HELP!**

i know but can you please help me do the rest

*January 31, 2013*

**Math 8R - HELP!**

Multi-Step Equations Systems of Equations x + y = 0 5x + 2y = -3 this is what i got so far.... x + y = 0 ----> x = 0 - y 5x + 2y(0-y) = -3 please help!!!!

*January 31, 2013*

**MATH 8 HELP!**

Y = -x + 10 y = x + 2

*January 30, 2013*

**physics**

A cement block accidentally falls from rest from the ledge of a 51.7-m-high building. When the block is 14.9 m above the ground, a man, 2.05 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way?

*January 27, 2013*

**Math 8 - HELP! (PLZ!) **

7 times a number decreased by 4 is the same as 6 plus twice that number my answer - 7n - 4 = 6 + 2n am i correct and can you help me solving it, please!!! thank you! :)

*January 23, 2013*

**Math 8 - HELP!**

Thank You! :) You can delete my other post (sorry about that...)

*January 23, 2013*

**Math 8 - HELP!**

7 times a number decreased by 4 is the same as 6 plus twice that number my answer - 7n - 4 = 6 + 2n am i correct and can you help me solving it, please!!! thank you! :)

*January 23, 2013*

**Math 8 - HELP!**

Write the equation of the line that passes through the points (1,6) and (-1,-2) please help!!!!

*January 22, 2013*

**Science 8R - help!**

ok, Thank You! :)

*January 22, 2013*

**Science 8R - help!**

HW - Name an example of the 6 simple machines that are in your home. So I have to write an example each or write an example that is an example for ALL six simple machines.

*January 22, 2013*

**Government & Politics**

All of the above

*January 22, 2013*

**Math 8 - HELP!!!**

Give an example of a rational number between 1.5 and 1.75 Ok.. I SERIOUSLY need help with this problem.

*January 17, 2013*

**Please help -biology**

YOUR WELCOME! :)

*January 17, 2013*

**Please help -biology**

Because they both have different bonds. Water contains stable O-H bonds, whereas hydrogen peroxide contains a much less stable O-O bond as well. Because there is an extra bond in hydrogen peroxide, the molecule as a different geometry than the water molecule. This already ...

*January 17, 2013*

**Math 8 - HELP!!!**

THANK YOU! :)

*January 17, 2013*

**Math 8 - HELP!!! **

A 5 7/8 ft section of wood was cut from 9 1/2 ft board. How much of the original board remained.

*January 17, 2013*

**7th grade science ms sue please**

A "normal" human has 46 chromosomes or 23 pairs so if you put 23 then your answer is invalid.

*January 16, 2013*

**math**

how many red beads would there be a pattern with 51 blue beads?

*January 14, 2013*

**Chemistry**

0.796 atm

*January 9, 2013*

**SS8R - help!!!!**

THANK YOU! :)

*December 19, 2012*

**SS8R - help!!!!**

What were the various ways in which Progressives reformed society in the following areas: voters' rights: 16th and 17th amendment big business: sherman anit-trust act public works: !?!?!?! woman rights: less corrupt + morally superior education: john deney (teach and ...

*December 19, 2012*

**English 8R - Essay Check (plzzz read!)**

Let me be frank. Its lousy. 1. In the introduction, describe in brief what you are going to to. Something like the trailer of a movie. (Para1)In the subsequent paragraphs, point out a contrast and a related similarity. (para 2) (para 3) 4. Summarize in a few lines what you ...

*December 18, 2012*

**English 8R - Essay Check (plzzz read!)**

thanksssss

*December 18, 2012*

**English 8R - Essay Check (plzzz read!)**

Please check my English essay to see if it's good. I need help with my conclusion. There are similarities and differences of the activities that take place in both urban and rural setting. The activities that take place in both rural and urban setting of these two pieces. ...

*December 18, 2012*

**chemistry**

An experiment requires 0.7 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.7 M base? Answer in units of mL

*December 18, 2012*

**chemistry**

An experiment requires 0.7 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.7 M base? Answer in units of mL

*December 18, 2012*

**chemistry**

A sample of 6.65 grams of NaOH is dissolved into 621 mL of aqueous 0.250 M NaOH (as- sume no volume change). This solution is then poured into 2.16 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...

*December 18, 2012*

**spanish**

what would the possesive pronoun be? Se me quedaron en casa los libros. ¿Trajo Ana ____ (hers)? Uso mi teléfono celular cuando viajo. ¿Cuándo usa Ramón _____ (his)? Tu profesora es muy simpática. _____ (Ours) es simpática tambi&...

*December 15, 2012*

**Physics**

When a load of 0.97 106 N is placed on a battleship, the ship sinks only 3.0 cm in the water. Estimate the cross-sectional area of the ship at water level. (The density of sea water is 1.025 103 kg/m3.)

*December 12, 2012*

**Physics**

A pipe contains water at 4.80 105 Pa above atmospheric pressure. If you patch a 3.55 mm diameter hole in the pipe with a piece of bubble gum, how much force must it be able to withstand?

*December 12, 2012*

**history**

1. How did the ‘ruling class’ change after the American Revolution? 2. How did the ‘ruling class’ change after the Haitian Revolution? 3. How did the ‘ruling class’ change after the French Revolution?

*December 4, 2012*

**poetry**

Can anbody tell me what personification is please.

*December 3, 2012*

**chemistry**

what is the molality of a solvent that is 0.15 degree celcius

*November 25, 2012*

**debate**

i just need some point or info on pro side: - Taxes gain more money over time - Tax on capital gains at same rate as income tax will benefit the government con side: - When taxes get too high, economy goes into recession - trimming tax cuts are more simple than they seem thank...

*November 18, 2012*

**physics**

Unpolarized light passes through six successive Polaroid sheets each of whose axis makes a 59 degree angle with the previous one. What is the intensity of the transmitted beam, I/Io?

*November 16, 2012*

**chemistry**

a tank contains helium gas at 490 mmHg, nitrogen gas at 0.75 atm, and neon at 520 torr. What is the total pressure in atm?

*November 14, 2012*

**Chemistry**

a diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 degrees celcius. What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27 degrees celcius

*November 14, 2012*

**physics lab**

For an unknown sample of the experiment, students measure 1602 counts when they first receive their sample and 1317 counts 3.5 minutes later. Calculate the half-life t12 of their sample.

*November 14, 2012*

**physics**

a,c,d,e,f

*November 13, 2012*

**Calc II**

Can anyone just give me an idea on how to go about solving this problem

*November 7, 2012*

**Calc II**

Use the comparison or limit comparison test to decide if the following series converge. Series from n=1 to infinity of (4-sin n) / ((n^2)+1) and the series from n=1 to infinity of (4-sin n) / ((2^n) +1). For each series which converges, give an approximation of its sum, ...

*November 7, 2012*

**physics**

A charge of +Q and a charge of +2Q are separated by a distance r. The electric force of +2Q on +Q has a magnitude of F and is directed to the right. Which one of the following statements is correct regarding the electric force of +Q on +2Q?

*November 7, 2012*

**physics**

A beam of microwaves with wavelength= 1 mm is incident upon a 9 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

*November 6, 2012*

**Chemistry**

Aspirin is prepared by heating salicylic acid, C7H6O3, with acetic anhydride, C4H603. The other product produced is acetic acid, C2H402. C7H6O3+C4H6)3->C9H8O4+C2H4O2 What is the theoretical yield in grams of aspirin, C9H8O4, when 2.00 grams of salicylic acid is heated with ...

*November 6, 2012*

**Trigonometry **

Alrighty I have to find two real world sinusoidal functions. I found: 1. A piston in an engine moves up and down in a cylinder. The height, h centimeters, of the piston a t seconds is given by the function: h= 120 sin(πt) + 200. 2. You can find the amplitude of a wave ...

*November 6, 2012*

**math**

The two equivalent fractions of 8 over 36 are: 4/18 and 2/9

*November 5, 2012*

**Chemistry**

A 100g sample of ice at 0ºC is added to 150.0 mL of liquid water at 80ºC in a styrofoam cup calorimeter. (The specific heat capacity of water is 1.184 J/g•ºC, the density of water is 1.00 g/mL, and ∆Hºfus = 6.01 kJ/mol) a) Does all of the ice ...

*November 5, 2012*

**Math**

I think it's 11,211.

*November 2, 2012*

**Trigonometry **

4. Write the equation of the cosine function with an amplitude of 1/3, a period of 2pi, and a phase shift of 3pi/2. I got 1/3COS(1/2x-3pi), but I really do not think that is correct D: any tips or advice?

*November 2, 2012*

**Physics**

The path of a light ray that crosses the boundary between two diff. media is irreversible

*October 26, 2012*

**math**

(-x-3)+(4x-7) =(+4x-x)+(-7-3) =3x-10

*October 25, 2012*

**science**

what is the density if the mass is 17g and the volume is 34cm3 ?

*October 23, 2012*

**physics**

A certain 0.92 kg object will reach terminal velocity after 0.75 seconds. What is the speed of its terminal velocity and what is the force from air resistance at this speed? (Assume it would would accelerate at 9.81 m/s^2 until it reaches terminal velocity.)

*October 21, 2012*

**English**

well, if you will notice I gave the question and then my response.

*October 19, 2012*

**English **

Did I do these correctly? (This homework question was removed due to a copyright claim submitted by K12 Inc.)

*October 19, 2012*

**narbonne high**

46.65

*October 18, 2012*

**Calculus II**

i don't understand why you raised the 3 and 5 to 1/2

*October 17, 2012*

**Calculus II**

please someone help this is due tomorrow and i don't know where to start with solving this!

*October 17, 2012*

**Calculus II**

Fed loves polynomials with rational coefficients and only such polynomials.Suppose f(x)=square root of x. Find a polynomial P(x) that Fred will adore so that, for any x in the interval [3,5], the difference between P(x) and f(x) is less than .01 Hint: The interval is [3,5]. ...

*October 17, 2012*

**Early Child Care**

the answer is b: the brain runs better when food intake is irregular.

*October 16, 2012*

**7th Grade Math**

Oh i see, thank you for the link, that helps a lot.

*October 14, 2012*

**7th Grade Math**

this is how I solve, seems totally wrong. (17.5*7)/10 = x 122.5/10 = x 12.25 = x x = 12.25

*October 14, 2012*

**7th Grade Math**

A proportion is shown below. 7/10 = 17.5/x What is the value of x?

*October 14, 2012*

**Math (kindergarten)**

10+8+20+1= 39

*October 10, 2012*

**History**

how did the indians feel about being colonised by the brittish? and what was the relationship between the brittish and the indians?

*October 10, 2012*

**history**

i really need help on this short answer question. Compare and Contrast the significance of the various reform movements in Europe AND Asia during the Early Modern Era. thank you!!

*October 9, 2012*

**Math kindergarten**

I counter could either be a circle or square.

*October 9, 2012*

**Trigonometry help please!**

Assume that height is a function of age and that H=f(a) is the average height (in inches) for females in the US at age (a) years. What is the practical interpretation of f(z)+20? a. 20 years older than the average US female who is z inches tall b. 20 inches taller than the ...

*October 9, 2012*

**maths**

if the size of each exterior angle of a regular polygon is 90 degrees how many sides does it have?

*October 7, 2012*

**statistics**

According to the book Are you Normal?,40% of all US adults try to pad their auto insurance claims to cover their deductible. Your office has just received 128 in insurance claims to be processed in the next few days, what is the probability that fewer than 45 of the claims ...

*October 5, 2012*

**physics**

Matt runs away from Ashley. Matt runs 40 m north and 30 m west. What is the minimum distance Ashley must run to catch Matt? Draw the image and label the vectors and scalars.

*October 4, 2012*

**Statistics**

In a recent study a SRS of 525 employed Americans, 53 individuals indicated that they would fire their boss if they could. Calculate a 90% confidence interval for the population proportion who would fire their boss if they could.

*October 4, 2012*