Wednesday

July 1, 2015

July 1, 2015

Total # Posts: 82,635

**Chemistry ( I NEED HELP REAL QUICK )**

thank you!
*May 25, 2015*

**Math**

Mrs. Murphy separates her class into groups of 4 students each, 1 student is left over. If she separates her class into groups of 5 students each, 2 students are left over. What is the least number of students the class could have?
*May 25, 2015*

**Dynamics**

The flat circular disc rotates about a vertical axis through O with a constant angular velocity of 240rpm. Prior to rotation, each of the 0.5kg sliding blocks has the position x=25mm with no force in its attached spring. Each spring has a stiffness of 400N/m, Neglect any ...
*May 25, 2015*

**Probability**

c=0,414
*May 25, 2015*

**Probability**

a) x_1
*May 25, 2015*

**Chemistry**

A method to determine the chloride ion content of water involves precipitate the chloride ion as silver chloride using silver nitrate. Assuming that all the chloride ions in solution can be precipitated using silver nitrate, explain how this process might be performed and the ...
*May 24, 2015*

**CHEM**

You have a bottle of water. The water has a mass of 29 grams. You heat the water with 102 calories of heat and the final temperature of the water is 43°C. What was the initial temperature (in Celsius) of the water before you added the heat? The specific heat of water is 1 ...
*May 24, 2015*

**Calculus**

No top? Area=s^2+ h*s dA/ds=2s+h=0 s=h/2 but volume=s^2*h h=32/s^2 s=h/2=16/s^2 s=cubrt16 h=2cubrt16 check: volume=s^2*h=cubrt16 ^2 2cubrt16 volume=32
*May 24, 2015*

**Art**

Oh wow I just took the test and @m1538 got me a 100% trust him he is right!!!!
*May 24, 2015*

**Art**

somebody!!!!! Anybody???
*May 24, 2015*

**Art**

is @m1538 right?
*May 24, 2015*

**Life orientation**

It is position taken by editors,geographical distribution and space allocated
*May 24, 2015*

**Life orientation**

Four factors that could threat the core function of media
*May 24, 2015*

**4th grade Science (Please Help!)**

the cover on the bowls
*May 24, 2015*

**Combinatorics**

If we roll 19 identical dices together at the same time and calculate the sum of the numbers rolled, how many different possible values of the sum can we get?
*May 24, 2015*

**English check**

1. In the movie 10 things I hate about you, who is Mandela, Kat's friend, fond of? Is the answer Michael 2. In the movie 10 things I hate about you, how does Michael win Mandellas affection? I need help with this one!
*May 24, 2015*

**maths**

volume=PI*4^2*2 meters cubed. mulltiply that by 1000 liters per cubic meter, and you have it.
*May 24, 2015*

**LIFE ORINTATION**

Analyse "the media do not tell us what to think.tell us what to think about "
*May 24, 2015*

**Combinatorics**

Ok. So for 2x2 2 tiles I got 16 for 2x2 3 tiles I got 24 and for 2x2 4 tiles I got 10 Finally, I counted up 65 ways. But it is still the wrong answer. Where am I wrong?
*May 24, 2015*

**Combinatorics**

It is not the right answer, unfortunately.
*May 24, 2015*

**Combinatorics**

We have two kind of tiles : 1 x 1 and 2 x 2, and use them to cover the 8 x 3 road without overlapping, how many different ways to arrange tiles there?
*May 24, 2015*

**Health **

The burning of fossil fuels contributes to: water pollution sewage air pollution**** land pollution
*May 23, 2015*

**Grammar**

2nd one is correct
*May 23, 2015*

**Grammar**

Is the sentence below correct? I want to not only be able to... Or is it: I want not only to be able to...
*May 23, 2015*

**Health **

Using a glass coffee mug instead of a disposable cup is an example of _________. 1.Reducing 2.Reusing*****
*May 23, 2015*

**ethics**

Which of the following occurs when jurors return a verdict which is consistent with their own sense of justice and morality, but inconsistent with the law
*May 23, 2015*

**ethics**

Which of the following occurs when jurors return a verdict which is consistent with their own sense of justice and morality, but inconsistent with the law
*May 23, 2015*

**economics**

Welfare payments or consumer subsidies
*May 23, 2015*

**math**

which of the following statements is true 15divide 0=0 or 0 divide 15=0
*May 23, 2015*

**English**

1. identify the adjective phrase in this sentence. The rice in the pot is not yet completely cooked. **Completely cooked 2. The convertible in the garage has only 20000 miles on it. **only 20000 miles 3. Identify the word that the capitalize adective phrase modifies. The ...
*May 23, 2015*

**Combinatorics**

Wrong answer.
*May 23, 2015*

**Combinatorics**

There are two rows of seats in the classroom and each row has six seats. If a class has nine students, and among them three female students G1, G2 and G3 always sit in the first row, two male students B1, B2 always sit in the second row. In how many different ways can all the ...
*May 23, 2015*

**JAVA PROGRAMMING**

Input data: Naji Hasan 90 85 87 Lisa Smith 80 67 70 Andy Malik 75 80 52 Ravi Gupta 90 95 98 Dave Blair 50 61 70 Sara Clark 70 65 81 Sami Moosa 55 50 71 Imed Radhi 90 83 89 Kira Sunny 65 70 69 Hind Ahmed 70 81 88 Most (simple) computer programs consist of three parts, input, ...
*May 23, 2015*

**Geometry**

PR=PS ray RV bisects angle PRS, ray SV BISECTS ANGLE PST prove angle V= 1/2 angle P where angle P = 4x
*May 23, 2015*

**Math**

Ansgar is writing a novel. He writes seven days a week. On each of those days he writes for at least 4 hours but never more than 8 hours. Last week, he wrote for exactly 46 hours. What is the maximum number of days on which he could have written for 8 hours? A. 2 days B. 3 ...
*May 22, 2015*

**Science**

Petroleum, Natural Gas, and Coal and Uranium.
*May 22, 2015*

**Science**

What is the most popular non-renewable energy source?
*May 22, 2015*

**Algebra**

So, they way you have it typed, I'd say it's 1^9
*May 22, 2015*

**Algebra**

No, when you divide with exponents, you subtract the exponents. It's the opposite from multiplication, how you add the exponents. When it comes to divide exponents, you subtract the exponents.
*May 22, 2015*

**Math**

If (1 / 49)^ n + 3 = radical (7), then n=? F. - 7 / 4 G. 9 / 4 H. -11 / 4 J. -13 / 4 K. 15 / 4
*May 22, 2015*

**Combinatorics**

Done. It is 229. Thank you.
*May 22, 2015*

**Combinatorics**

How many even integers which are between 1 and 1000 (including 1 and 1000) and relatively prime to 105?
*May 22, 2015*

**Math**

Cone surface area: π(10)(15) = 150π Hemisphere surface area: 2π(10)^2 = 200π 350π is the surface area Cone volume: 1/3π(10)^2(11.2) = 373.3π I got the height by using the pythagorean theorem. Hemisphere volume - 2/3π(10)^3 = 666.7π...
*May 22, 2015*

**Math **

What is the surface area and volume of a composite figure made up of a hemisphere and a cone in terms of pi? The radius is 10, and the slant height is 15. Ans: surface area: 350 pi units^2 volume: 1039.4 pi units^3
*May 22, 2015*

**The Giver**

Which statement provides the best summary of chapter 15? A. Jonas finds the giver in pain and offers to help. B. Jonas experiences tiny pinpricks of snow that touch his body and melt on his tounge. C. The Giver explains to Jonas why the pain and the carnage of war are ...
*May 22, 2015*

**Intro. to Computers**

The command prompt found on Windows 7 and Windows 8 is very similar to the interface of what past operating system?
*May 22, 2015*

**apush**

in the 11828 election there were more _ because property requirements were eliminated .
*May 22, 2015*

**physics**

is differentials used in burger's equation?
*May 22, 2015*

**physics**

is differentials used in burger's equation?
*May 22, 2015*

**ap chem**

Bismuth can be electrolytically reduced according to the following reaction: BiO(+)+ 2H(+)+ 3e¯ >>> Bi + H2O How many grams of bismuth can be reduced by applying a 5.60 A current for 23.8 min. to a solution containing BiO+ ions (assuming 100% efficiency)?
*May 22, 2015*

**AP Chem ---**

i need help with this
*May 22, 2015*

**maths**

Tan 7 theta × tan 3 theta = 1 find the value of theta
*May 22, 2015*

**math**

You roll a number cube numbered one to six 12 times. P(5)=2/3. What type of probability is illustrated and why?
*May 22, 2015*

**is the ph= o for the H+**

thanks
*May 21, 2015*

**is the ph= o for the H+**

-0.24925=log {h+)
*May 21, 2015*

**is the ph= o for the H+**

Calculate the pH of the cathode compartment for the following reaction given Ecell = 3.01 V when [Cr3+] = 0.15 M, [Al3+] = 0.30 M, and [Cr2O72-] = 0.55 M. 2 Al(s) + Cr2O72-(aq) + 14 H+(aq) → 2 Al3+(aq) + 2 Cr3+(aq) + 7 H2O(l)
*May 21, 2015*

**Math**

From a point 120m from the foot of a building, the angles of elevation of the top and bottom of the flagpole are 49 degrees and 46 degrees respectively. Find the height of the flagpole (answer 13.8m) I couldn't get the answer because I thought the question was worded weird...
*May 21, 2015*

**English**

Government control and addiction to technology.
*May 21, 2015*

**English**

What are the worst aspects of the dystopian future in Fahrenheit 451?
*May 21, 2015*

**Physics**

Three charged particles are arranged on corners of a square as shown in the figure below, with charge -Q on both the particle at the upper left corner and the particle on the lower right corner, and charge +2Q on the particle at the lower left corner. (i) What is the direction...
*May 21, 2015*

**science (theory of evolution)**

^^^^ thank you this helps out a lot
*May 21, 2015*

**science (theory of evolution)**

1.What is two pieces of evidence used to support theory of evolution? Do you guys think it would be alright if I said that they observed nature. And also if you guys could help me come up with another example I would REALLY appreciate it!!
*May 21, 2015*

**Math!! (repost) really need help!!**

A cone has a diameter of 24 in. and a height of 10in. What is the volume of s cone? use 3.14 as an approximation.. final answer in tenths - Im stuck between two answers: 94.25 because if I do 3 x 10 to find the volume. I say 3 because the diameter is 24 in., also 8 x 3 equals ...
*May 21, 2015*

**Math**

Thank you !!
*May 21, 2015*

**Math**

"A system of equations can have two answers beside an actual set of coordinates. What are they?" Would the two other answers be graphing and ratio, or ..
*May 21, 2015*

**Math.**

A cone has a diameter of 24 in. and a height of 10in. What is the volume of s cone? use 3.14 as an approximation.. final answer in tenths - Im stuck between two answers: 94.25 because if I do 3 x 10 to find the volume. I say 3 because the diameter is 24 in., also 8 x 3 equals ...
*May 21, 2015*

**Math**

ohh, thank you!
*May 21, 2015*

**Math**

x+3y = 10 & x=2y-5 could someone explain how to do this.
*May 21, 2015*

**Patst**

would this be correct -3squared + ( (5 (8-6) ) / 2 + 45 ) / 5 =9 + ((5x2)/2)+9 -9 + 5 + 9 =23
*May 21, 2015*

**science**

when you turn a television on, you transfer electrical energy into __. choose all that apply. a heat energy b light energy c elastic potential energy d sound energy
*May 21, 2015*

**math**

How much should linda set aside to buy equipment that costs 7,100 in one year the current interest rate is 0.6% annually compounded annually
*May 21, 2015*

**algebra**

would this be correct -3squared + ( (5 (8-6) ) / 2 + 45 ) / 5 =9 + ((5x2)/2)+9 -9 + 5 + 9 =23
*May 21, 2015*

**life orientation**

List and discuss any 4 factors that could thraten or limit the core function of the media
*May 21, 2015*

**life orientation assignment**

List and discuss any four factors that could threaten or limt the core functions of the media
*May 21, 2015*

**math**

How would I show my work for this problem Find the value of the following: -3squared + ( (5 (8-6) ) / 2 + 45 ) / 5
*May 21, 2015*

**Life orintation**

Four factors that could threaten or limit the core functions of the media
*May 21, 2015*

**heath part2**

Nearly ________ movement in the body is the result of muscle contraction.
*May 21, 2015*

**school**

A large pipe can fill a tank 10 minutes faster than it takes a smaller pipe to fill the same tank. Working together, both pipes can fill the tank in 12 minutes. How long would it take the large pipe working alone to fill the tank?
*May 21, 2015*

**History**

Explain the four-step process King outlines for their nonviolent campaign.
*May 21, 2015*

**i need help finding PH**

Calculate the pH of the cathode compartment for the following reaction given Ecell = 3.01 V when [Cr3+] = 0.15 M, [Al3+] = 0.30 M, and [Cr2O72-] = 0.55 M. 2 Al(s) + Cr2O72-(aq) + 14 H+(aq) → 2 Al3+(aq) + 2 Cr3+(aq) + 7 H2O(l)
*May 20, 2015*

**PHYSICS**

The drawing shows an ideal gas confined to a cylinder by a massless piston that is attached to an ideal spring. Outside the cylinder is a vacuum. The cross-sectional area of the piston is A = 2.50 × 10-3 m2. The initial pressure, volume, and temperature of the gas are, ...
*May 20, 2015*

**college chemistry**

does the ph equal 0?
*May 20, 2015*

**college chemistry**

how do you solve for H^14?
*May 20, 2015*

**college chemistry**

i cant get the answer!!
*May 20, 2015*

**college chemistry**

how do you find the ph of H+?
*May 20, 2015*

**college chemistry**

Calculate the pH of the cathode compartment for the following reaction given Ecell = 3.01 V when [Cr3+] = 0.15 M, [Al3+] = 0.30 M, and [Cr2O72-] = 0.55 M. 2 Al(s) + Cr2O72-(aq) + 14 H+(aq) → 2 Al3+(aq) + 2 Cr3+(aq) + 7 H2O(l)
*May 20, 2015*

**college chemistry**

Consider only the species (at standard conditions) Na+, Cl-, Ag+, Ag, Zn++, Zn, Pb in ...? answering the following questions. Give reasons for your answers. a. Which is the strongest oxidizing agent? b. Which is the strongest reducing agent? c. Which species can be oxidized by...
*May 20, 2015*

**ap chemistry**

What volume of H2(g) and O2(g) is produced by electrolyzing water at a current of 4.00 A for 12.0 minutes (assuming ideal conditions)?
*May 20, 2015*

**college chemistry**

predict the order of reduction and which of the following ions will reduce first at the cathode of an electrolytic cell: Ag^(+), Zn^(+2), IO3^(-)?
*May 20, 2015*

**physics**

A plane flies at 20.0m/s ascending at 30 degrees above the horizontal. The plane drops a care package at a height that allows the package to land 750m away (horizontally). 1.) At what location above the ground was the package released? 2.) Find the velocity (magnitude and ...
*May 20, 2015*

**college chemistry**

how many grams of copper can be reduced by applying a 3.00 A current for 16.2 minutes, to a solution containing Cu^(2+) ions?
*May 20, 2015*

**college chemistry**

1. what voltage is necessary to force the following electrolysis reaction to occur? which process would occur at the anode? cathode? assuming the iodine oxidation takes place at a platinumm electrode, what is the direction of electron flow in this cell? 2I^(-)(aq)+Cu^(+2)(aq...
*May 20, 2015*

**Math**

Amanda wants to shorten the wheelchair ramp at her front door. The current ramp is 13 feet along the horizontal and the step is 9 inches high. If she doubles the measure of the angle that the ramp makes with the walkway, how long will the new ramp be to the nearest inch?
*May 20, 2015*

**4th Grade Math**

d:c=5:4 or d/c=5/4 or d=c x 5/4 or d=c*(1 + 1/4)= c+ c/4 But d=153-c then 153-c=c+c/4 or 153=2c+c/4=c*2 1/4= c* 9/4 or c=4/9 * 153=612/9=68 cats=68
*May 20, 2015*

**Trig**

Find sin2theta, cos2theta, and tan2theta for costheta = -12/13 in pi < theta < 3pi/2. My answers: 20111/24336 for tan2theta. 144/169 for cos2theta -120/338 for sin2theta
*May 20, 2015*

**Physics**

you hear the sum, and the difference: 910, and 90hz. And, your hear the original, 410 and 500hz
*May 20, 2015*

**PHYSICS**

The drawing shows an ideal gas confined to a cylinder by a massless piston that is attached to an ideal spring. Outside the cylinder is a vacuum. The cross-sectional area of the piston is A = 2.50 × 10-3 m2. The initial pressure, volume, and temperature of the gas are, ...
*May 20, 2015*

**PHYSICS**

I'm still not getting the right answer for it...
*May 20, 2015*

**PHYSICS**

vaporization takes place while the Hg is above 100C, or 100C+. so until the water heats to 100, no vaporization. HeatGained by water+heatgainedHg=0 .498*cwater*(100-81.6)+4.04*CHg*(Tf-210)=0 so calculate Tfinal for the Hg...note it is not in equilibrium with the water temp... ...
*May 20, 2015*

**physics**

Net force down=friction + weight = -mg*mu*Cos5+mg*sin5 so is the net force > 0?
*May 20, 2015*