Thursday

September 1, 2016
Total # Posts: 1,633

**chem**

the following experiment was performed in the laboratory : an excess of solid SrCrO4 is vigorously shaken in water until a saturated solution is obtained. The excess solid is filtrated from the solution and 25.00 ml of the solution is titrated with 0.0115 M fe(no3)2 solution. ...
*November 17, 2015*

**Physics**

A block is on the end of a massless cable that is tied to a frictionless wheel (uniform disk) as shown in the figure at right. The wheel has a radius of 0.4 m. The system is initially at rest. If the block moves downward, with a constant acceleration, a distance of 2 m in 3 s...
*November 17, 2015*

**Chemistry **

You have a 250ml solution of 0.13M calcium iodate. How many grams of potassium iodate need to be added to the solution to begin to precipitate calcium iodate? The solubility product constant for calcium iodate is6.47 *10^-6. B) you have a 250ml solution of 0.13 M calcium ...
*November 14, 2015*

**physics**

How did you get three? .-.
*November 12, 2015*

**physics**

Upwards
*November 12, 2015*

**physics**

A stone is thrown from a height of 1.8 with a velocity of 29.4. How long does it take to reach its greatest height? I'm sure it has something to do with the s=ut+1/2 at squared not sure though
*November 12, 2015*

**Marie Ernestine**

Math/Science A car starts from rest and moves at the speed of 30 kph after half an hour. What is the cars acceleration?
*November 11, 2015*

**science help ASAP**

The answer for the first one is correct and the answer for the second one is D.
*November 10, 2015*

**physics**

Any ideas? A bird flying at 3m/'s west is given an acceleration of 1ms after five seconds what I'd it's velocity and how far has it travelled from its starting point?
*November 5, 2015*

**physics**

Got the answer it's basically 5-2/2.1=1.43s
*November 5, 2015*

**physics**

Relating to the first question. How long did it take to do this?
*November 5, 2015*

**physics**

Thanks. I understand it now. But we have like set formulas in our tables for incidence like v=u+at etc. I have learnt the changing velocity over time but in a test situation would I have to use the formulas given or the method appove?
*November 5, 2015*

**physics **

So basically I got this question and it's baffling. Over a distance of 5m the speed of a bicycle increase's from 2ms to 5ms what I's the magnitude of acceleration?
*November 5, 2015*

**Social Studies**

Yeah what is the second answer
*November 5, 2015*

**Math **

A boat pilot wishes to go in a straight line across a river from the east dock to the west dock in a ferryboat that has a still water speed 8.0 knots. If the river has a Southward current of 2.5 knots, what compass heading should be maintaned while crossing the river? What is ...
*November 3, 2015*

**kon**

can someone edit my essay?
*October 24, 2015*

**history**

what event convinced south Carolina to spend representatives to the first continental congress ? A. passage of the currency act B. passage of the intolerable act C. passage of the navigation act D. passage of the stamp act is it D
*October 20, 2015*

**calculus**

find the first and second derivatives for 3x^4-4xy^2+7=2y
*October 14, 2015*

**Algebra 1**

A drama club wants to raise at least $500 in ticket sales for its annual show. The members of the club sold 50 tickets at a special rate of $5. The usual ticket price the day of the show is $7.50. At least how many tickets do they need to sell the day of the show to meet the ...
*October 11, 2015*

**Social Studies**

which of the tive themes includes the human and physical features at a specific location
*October 4, 2015*

**Science**

What is the total displacement of two trips one 10km north and the other 24km east
*September 30, 2015*

**Social Stuides**

Hm, do you have any ideas on what it inspired then Reed?
*September 30, 2015*

**Social Stuides**

I'm actually currently surprised I didn't think of that, good idea!
*September 30, 2015*

**Social Stuides**

Wow, thank you for the help! Now I should be able to finish up this project! :D
*September 30, 2015*

**Social Stuides**

That's actually pretty good! Thanks, but i'll also want something more then ang gaming system. I'm going to defintaly use this.
*September 30, 2015*

**Social Stuides**

What were some inventions that were inspired by the telephone? I've already got computer, please don't say another phone like the cell phone and smart phone. Thanks!
*September 30, 2015*

**Physics**

The slab of steel shown below is being lifted at 0.50 m/s. It weighs 1.91×103N. If the angle θ equals 61.4 degrees, what is the tension in each cable?
*September 26, 2015*

**Finance**

DBP Inc. just paid a dividend of $2.50. The expected growth rate of dividend is 5 percent. The required return for investors in the first three years is 12 percent and 10 percent for the following three years. After those six years the required return is 8 percent. What is the...
*September 26, 2015*

**Maths**

A ladder of a length of 6m is placed against a wall. The distance from the foot of the ladder to the wall is 2.5m. How far up the wall is the ladder?
*September 22, 2015*

**algebra **

Variables that must be excluded from 2y^2+7y-30/y+6
*September 18, 2015*

**college algebra**

192,031 / 3.2 = 1% of the population =60,009.6875 60,009.6875*100=total population =6,000,969 people in Indiana
*September 15, 2015*

**physics**

A tennis player serves a tennis ball it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 12 meters, it has dropped 55cm from its original height when it left the racquet. What is the initial speed of the ball? (neglect air ...
*September 13, 2015*

**physics**

A tennis player serves a tennis ball it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 12 meters, it has dropped 55cm from its original height when it left the racquet. What is the initial speed of the ball?
*September 13, 2015*

**Science**

the answer is that it will float because of BOFA DEEZ NUTS AHHAHAHHAHAHAH GOT EM
*September 10, 2015*

**Math**

Insert parentheses to make this number sentence true 81+19\25=9
*September 8, 2015*

**chemistry**

A normal salt is formed when all the hydrogen atoms in acid have been replaced by a metal.Give equation
*September 7, 2015*

**math**

Yes
*August 31, 2015*

**language arts**

A
*August 28, 2015*

**Algebra**

7 is the correct answer
*August 26, 2015*

**physics**

Using the following conversion factors, determine the number of milliliters in a volume of 2.37 fluid ounces: 1 gallon (gal) = 128 oz., 3.785 x 10-3 cubic meters (m3) = 1 gal, 1 mL = 10-6 m3. I got an answer 7.09ml, but it's incorrect, so confused how to covert those factors
*August 8, 2015*

**math**

Point C and point D are plotted on the graph. Plot points A and B to form rectangle ABDC with an area of 36 square units. Plot point E at (2, 4).
*July 17, 2015*

**english**

No i have to do a tale. I wont do that idea, because it wouldn't work. Thank you for your suggestions.
*July 10, 2015*

**english**

Thank you.. i wanted something to do more with the weather of summer, but i dont think it would work for a tale??
*July 10, 2015*

**english**

Taking a summer course and reading a novel
*July 10, 2015*

**english**

I need to create a tale, which the principal topic is summer. Im not sure what kind of tale i can write about summer
*July 10, 2015*

**Chemistry**

Also*
*July 8, 2015*

**Chemistry**

Always the answer would be .1, right?
*July 8, 2015*

**Chemistry**

Just trying to understand this, but is C always the basic number when doing problems like this?
*July 8, 2015*

**Chemistry**

If the electromagnetic radiation used to send television signals have a frequency of 3.0 * 10^9 Hz, what is its wavelength? I forget how to do a problem like this. Just taking a guess, is this somewhat a conversion equation?
*July 8, 2015*

**Chemistry**

How does the kinetic-molecular theory help explain the difference between solids, liquids, and gases? I don't know how to really answer this question because the theory only talks about gases, unless I am looking at the wrong one. I tried to look it up swell and all I got ...
*July 8, 2015*

**Chemistry**

When naming a molecular compound, such as CO, would I write it as mono carbon monoxide or carbon monoxide? My textbook has the rule written as prefix+1st element prefix+2nd element, but I am not sure if the mono applies to the carbon or not.
*July 7, 2015*

**Chemistry**

Other than what you stated, I feel as if I need something else to answer the first question, such as numbers to help back it up.
*June 28, 2015*

**Chemistry**

What data led to the development of the Law of Multiple Proportions? Give an example and explain why this law is important in chemistry. Would this be a good answer: John Dalton used the same observations he used for his law of definite proportions to help develop the law of ...
*June 28, 2015*

**Chemistry Stoichiometry**

Oh I see now. I read it as each step you had was just different equations that you combined, not as a series of steps. Thank you!
*June 27, 2015*

**Chemistry Stoichiometry**

I wasn't in class when my teacher taught me this, and she did not go over the material well, so how were you able to go from PV=nRT to M=dRT/P?
*June 27, 2015*

**Chemistry Stoichiometry**

The density of chloroform at a pressure of 220 mmHg and 25 degrees celsius is 1.42 g/L. Calculate the molar mass of chloroform. My set up is: mol*K .289 atm 1 1.42g/L ------------- ------------ ------ --------- .08206Latm 1 298K What I am unsure of is if this is the right way ...
*June 27, 2015*

**Chemisty**

How does the kinetic molecular theory help explain the difference between solids, liquids, and gases? Would the answer be basically stating how the theory states the difference of their atom structure? Or is it something else?
*June 27, 2015*

**Calculus**

Let f : R --> R be an odd function. Explain why, for any positive number a, the integral from -a to a of f(x) = 0.
*May 19, 2015*

**Chemistry**

yes that's what he was asking, thank you!
*May 14, 2015*

**Chemistry**

Consider the combustion of ethane: 2C2H6(g)+7O2(g)-->4CO2(g)+6H2O(g) If the ethane is burning at the rate of 0.7 mol/L × s, at what rates are and being produced?
*May 14, 2015*

**Chemistry**

The thiosulfate ion (S2O32-) is oxidized by iodine as follows: 2S2O32-(aq) + I2(aq) → S4O62-(aq) + 2I-(aq) In a certain experiment, 4.41×10-3 mol/L of S2O32- is consumed in the first 11.0 seconds of the reaction. Calculate the rate of production of iodide ion in ...
*May 14, 2015*

**Chemistry**

Which has the highest, second highest, third highest, and lowest boiling points? 1.0.20 m MnSO4 2.9.6E-2 m Al2(SO4)3 3.8.4E-2 m Al2(SO4)3 4. 0.45 m Sucrose(nonelectrolyte) [I know it is m times i but not sure how to get "i"]
*May 13, 2015*

**IT/235 - IMAGE EDITING AND IMPLEMENTATION**

If done in-house, what equipment would be required and what costs would be incurred? How would the photography affect the day-to-day store operations under each model?
*May 11, 2015*

**Chemistry**

A solution is made by dissolving 26.7 g urea, a nonelectrolyte, in 301 g water. (The vapor pressure of pure water is 23.8 torr at 25°C and 71.9 torr at 45°C.) Calculate the vapor pressure of this solution at 25°C.
*May 6, 2015*

**Algebra**

What the minimum of y=2x^2-7x-2? How do you find it?
*April 21, 2015*

**maths, functions**

The demand in units per week for a given product as a function of its price, p, in dollars is given as D(p) = 1100 Ð 200p, the supply of the same product in units per week as a function of its price, p, in dollars is given as S(p) = 100p Ð 100. The market clearing ...
*April 21, 2015*

**operation managment**

Garden Variety Flower shop uses 625 clay pots a month. The pots are purchased at $2 each. Annual carrying costs per pot are estimated to be 15 percent of cost, and ordering costs are $125 per order. The manager has been using an order size of 1,500 flower pots. There are 4 ...
*April 16, 2015*

**Calculus**

a) The value of a computer after t years after purchase is v(t) = 1000e^(-0.45t). At what rate is the computer's value falling after 5 years? b) Assume that the total revenue received from the sale of x items is given by R(x) = 32 ln (5x+3), while the total cost to produce...
*April 13, 2015*

**algebra **

Solve: 2a-3/a+1 = 3a-5/a+3
*April 11, 2015*

**math**

Ms. Sue! Can you please help me?
*April 9, 2015*

**math**

Boris has a coin and a number cube. The number cube is labeled 1-6. He flips the coin once and rolls the number cube once. What is the probability that the coin lands tails up and the cube lands on a even number? A. 2/3 B. 1/4 C. 1/12 D. 1/6 How do i solve this problem? I'...
*April 9, 2015*

**social studies**

I need help with the same question...
*April 7, 2015*

**geometry.**

Theres no numbers given to answer this question.
*April 6, 2015*

**Math**

Wells uf you think and do the math you Will get 3 Lbs and 6 Oz
*April 2, 2015*

**This is nothing to do with school **

A cinema sells adult tickets and child tickets. The total cost of 3 adults and 1 child is £30 The total cost of 1 adult and 3 children is £22 What is the cost of adult and child tickets
*March 31, 2015*

**6 grade math**

Choose all statements that are not true. a 20% of 20 is 4 b 30% of 30 is 9 c 40% of 50 is 15 d 50% of 110 is 60 e 60% of 60 is 360 The answer I choose is all of them. Is this correct.
*March 26, 2015*

**Math**

Choose all statements that are true? a 15% of 15 is 1 b 5% of 50 is 10 c 10% of 100 is 10 d 2% of 100 is 5 e 3 % of 200 is 6 I picked a, c and e.
*March 26, 2015*

**math**

2 lines are given by kx+6y-5=0 and 3x+2y+4=0 if they are parrallel what is the value of k
*March 22, 2015*

**Algebra**

If an angle, x, is in standard position, and P(-3, 4) is a point on the terminal side of the angle, what is the value of sin x?
*March 15, 2015*

**chemistry**

H2(g)+ o2(g)-> H20(l) (delta)Hf(h20(l)=-286 kj/mol the total volume of hydrogen needed fill the hindenberg was 2.3 x 15^5 m^3. what is the theoretical yield of heat (that which could have been evolved) when the hindenberg exploded, assuming all the hydrogen reacted?
*March 15, 2015*

**chemistry**

Hey DrBoB222 I was wondering if you could help me with that problem just a little bit ago again?
*March 14, 2015*

**earth**

Water
*March 14, 2015*

**trig**

The height should be somewhere around 4.5
*March 13, 2015*

**trig**

In this problem use Sin functions to solve. Sin(90) / 5 and set that equal to... Sin(65) / x and see what you come up with
*March 13, 2015*

**chemistry**

I would love help on trying to start this problem?
*March 13, 2015*

**chemistry**

okay thank you very much for helping me and everyone else that asks questions on here I think you did a really good job answering my questions and I will keep what you said about the molar mass and the atomic masses in mind for next time. Again I can't thank you enough.
*March 13, 2015*

**chemistry**

Is that the correct answers?
*March 13, 2015*

**chemistry**

okay I think I got, I got 7.1 x 10^-7 for part a, and I got for part b that they should be the same, and for part c I got 3.7 x 10^4, and finally for part d I got since 1.1 x 10^-8 is greater than 5.0 x 10^-13 a precip will form.
*March 13, 2015*

**chemistry**

so in the ICE box when you are solving for "x" am I supposed to use the Ksp for the solid
*March 13, 2015*

**chemistry**

Okay thank you
*March 13, 2015*

**chemistry**

I don't understand how to set it up and get started on the problem and this is a problem that our teacher gave us for practice for the AP Chem exam
*March 13, 2015*

**chemistry**

Several reactions are carried out using AgBr, a cream-colored silver salt for which the value of the solubility product constant, Ksp, is 5.0 x 10-13 at 298 K. a) Calculate the value of [Ag+] in 50.0 mL of a saturated solution of AgBr at 298 K. b) A 50.0 mL sample of distilled...
*March 13, 2015*

**Science**

A is right
*March 7, 2015*

**math**

If Someone estimatesthat their book bag weighs 8.5 pounds and actually weighs 11 pounds what is the percentage error
*March 5, 2015*

**Science**

It was c wasn't it
*March 5, 2015*

**math**

-230 this is because any numbers absolute value is that number with nothing els so a negitive is not a negitive it is positive and a positive is still positive
*March 5, 2015*

**biochemistry**

How to prepare 2L of 5.5M HCL solutions from scratch
*March 4, 2015*

**math**

First of all, lets note what the formula is. A=bh or lw 25 is the width so lets plug it in. 25w=150+175t Next, you evaluate that by Isolating the "w". Divide the 25 by 25 and divide 150+175t to get 6+7t Get rekt noob........
*March 3, 2015*

**Social Studies**

The people of Brazil can best be decribed as A Primarily indigenous in descent B largely of the white European ancestry C mestizos with shared-indigenous heritages <--- c is my answer D mixed race with native, African, and European roots.
*February 28, 2015*