Saturday

July 23, 2016
Total # Posts: 894

**12th grade chemistry**

It is required to titrate ethanol solution .Being available a 0.2mol/l potassium dichromate solution and 4mol/l sulfuric acid solution on the presence of a convenient indicator. a)indicate the glassware used for titration. b)give a brief description of the procedure followed ....
*July 12, 2016*

**Physics**

In the figure, a small 0.125 kg block slides down a frictionless surface through height h = 0.958 m and then sticks to a uniform vertical rod of mass M = 0.250 kg and length d = 2.32 m. The rod pivots about point O through angle θ before momentarily stopping. Find θ.
*July 3, 2016*

**Math**

Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 400 more points than Katie. If you let l= l= the number of points that Lisa scored, and k= k= the number of points that Katie scored, then the problem can be represented by the system:
*May 30, 2016*

**math**

I would think so.
*April 28, 2016*

**math**

Think of counting by 5's. 5, 10, 15, 20, 25 and so on. *Pretty sure, first time I'm answering on here.* (:
*April 28, 2016*

**Finance**

You want to be able to withdraw $25,000 from your account each year for 20 years after you retire. If you expect to retire in 25 years and your account earns 7% interest while saving for retirement and 6.7% interest while retired Round your answers to the nearest cents as ...
*April 27, 2016*

**math**

What is 78 / 9 x 3 + (6 - 9)?
*March 29, 2016*

**Collage Physic**

A uniform rod hangs vertically on a frictionless horizontal axle passing through its center. The rod is 35cm long and 85g. A 15g ball of clay travelling horizontally at 2.5cm/s hits and sticks to the bottom of the rod. What is the maximum angle the rod makes with the vertical ...
*March 28, 2016*

**Physics**

A 66.0 kg rider sitting on a 9.4 kg bike is riding along at 9.1 m/s in the positive direction. The rider drags a foot on the ground and slows down to 7.0 m/s still in the positive direction. What is the change in momentum of the rider and bike?
*March 23, 2016*

**Physics **

A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. For a soft board, the bullet goes through the board and emerges with a speed of 50 m/s. What was the average force exerted on the bullet by the board? Answer= 27344 N Show Work
*March 18, 2016*

**Maths sequences**

Thank you !
*February 20, 2016*

**Maths sequences**

Question= Find the sum of all the odd numbers up to and including 99,999. Would a=1 because its the first odd number in the sequence? And would d=2 ? So then would you do S99,999= 49999.5(2+99,998(2)) Then divide by two?
*February 20, 2016*

**math**

5/8 x+ 1/16 x = 3/16 + x x= - 3/5 I'm trying to verify my answer. these are fractions
*February 8, 2016*

**Math**

idk what but, 10.5 divided by 3 is 3.5
*February 8, 2016*

**math**

a recipe calls for 5/7 cup of granola. how much is needed to make half the recipe.(1/2)(5/7)= 5/14 Is this correct?
*February 5, 2016*

**Physics**

It's my first time taking physics, how would I get to the answer?
*January 24, 2016*

**Physics**

A tennis player strikes a ball when it is 1 m above the ground, with a velocity 17 m/s at 30 degrees above the horizontal. The net is 4 m away horizontally and it is 0.6 m high. How high, vertically, above the net does the ball pass?
*January 24, 2016*

**art**

how Picasso used shape or form in the Weeping Woman, and the effect of that usage on the artwork.
*January 20, 2016*

**math**

what is pi
*December 7, 2015*

**science**

I need an acrostic poem about forces
*December 7, 2015*

**Physics**

A person who is 1.6 m tall throws a ball with a speed of 6.4 m/s at an angle of 65 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground?
*December 2, 2015*

**Hinigaran, math**

Four numbers are in the ratio 1:4:5:8. If the largest is 144, what is the sum of the four numbers?
*December 1, 2015*

**math**

Nina has a stick 5 ft. long. She saw it into 8 equal length pieces. How long will each piece be? Fraction Would it be 5/8 or 8/5 confused
*November 17, 2015*

**math**

Straight Numeric and Terminal Digit Filing i dont understand it at all
*November 14, 2015*

**History of Muslims**

1)what is the reason for the battle of uhud? 2)why did Wahshi al habashi want to kill hamza (the prophet mohammad's uncle)? 3) What was the prophet's plan on this battle ? 4)how many soldiers were in the muslims army and in the meccan army? 5)Why did the muslims lose ...
*November 11, 2015*

**Physics**

Two particles, of mass m and mass nm, undergo a head-on, fully elastic collision. (Here n is just a unitless number.) Before colliding the particles approach one another with equal speed v. Snapshots of the particles before, during, and after the collision are shown above. ...
*November 3, 2015*

**economics**

quainty would go down
*October 18, 2015*

**Science Urgent😖😖😖**

Organisms need to reproduce so they can keep species going.
*October 12, 2015*

**History**

Check my homework? Choices: A. Barbed-wire fences, B. windwills, C. steel plows, D. McCormick Reaper, E. railroads Question: Life on the prairie was difficult for everyone. But there were ways to succeed. Match the problems homesteaders faced with possible solutions. little ...
*October 10, 2015*

**History**

Check my homework? Choices: A. Barbed-wire fences, B. windwills, C. steel plows, D. McCormick Reaper, E. railroads Question: Life on the prairie was difficult for everyone. But there were ways to succeed. Match the problems homesteaders faced with possible solutions. little ...
*October 10, 2015*

**AP Calculus AB**

Hello! I'm having trouble with this related rates problem: A 5ft tall person is walking away from a 16ft tall lamppost at a rate of (2/x) ft/sec, where x is the distance from the person to the lamppost. Assume the scenario can be modeled with right triangles. At what rate ...
*October 4, 2015*

**physics**

Solve it pls?
*September 20, 2015*

**MATH HELP**

was is the right answer?
*September 9, 2015*

**algebra, numerical operation**

Danny made a mistake in the following problem. Each line shows the steps Danny took in order to solve the problem. The mistake was made in Line ___. Only input the number of the first incorrect line. Line 1 21 + 35 ÷ 7 + 6(2) Line 2 21 + 5 + 6(2) Line 3 21 + 11(2) Line ...
*August 26, 2015*

**math**

thanks steve
*August 13, 2015*

**math**

a pantry contains 6 shelves each 42 inches long. the shelves are to be reclined with fresh paper. the paper is sold in 1 yard rolls. the number of 1 yard rolls needed is:
*August 13, 2015*

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

I am a grade 10 learner doing Maths Literacy, Accounting, Business Studies, Economics, Life Orientation, English and Afrikaans I want to know what Degree I can study in University and also to check what career path I would be able to do.
*August 5, 2015*

**Calculus**

1. Provide an example of a function f that is continuous at a = 2 but not differentiable at a = 2. 2. Provide an example of a function g that is differentiable at a = 3 but does not have a limit at a = 3. Thanks!
*July 8, 2015*

**To Ms. Sue**

Hey Ms. Sue! I've got a question How well do you know everybody's questions? Like how do you know everything? That's all I want to know.
*May 19, 2015*

**English**

craniectomy sounds weird. I'll have to go with this.
*May 19, 2015*

**Calculus, derivatives**

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

**Spanish**

It looks cool of when you talk Spanish
*May 2, 2015*

**Language Arts**

It's A
*May 1, 2015*

**math**

a large piece of cadboard, 5cm by 8cm to be made by cutting out sqaures in each corner. find dimensions that will maximize the volume? vol= (8-2w)(5-2w) (w) answer= 1cm and 10/3 cm is this correct?
*March 29, 2015*

**Calculus **

1. Prove that, among all rectangles with fixed perimeter p, where p > 0, the largest in area is a square. 2. A 2 × 3 array of six congruent rectangular pigpens (that all look the same from above) will be in the overall shape of a rectangle R. We may use 100 feet of ...
*March 27, 2015*

**math**

Thanks!
*March 17, 2015*

**math**

Nolan practices the piano for 1 2/5 hours every Saturday and Sunday. How long does he practice each weekend? Express your answer in hours and minutes.
*March 17, 2015*

**chemistry**

Suppose a reaction has the equilibrium constant K = 2.3 10-7 at a particular temperature. Will there be a large or small amount of unreacted starting material present when this reaction reaches equilibrium? a)There will be a small amount of unreacted starting material present ...
*March 15, 2015*

**la check**

which of the following is not a major point of view first person third person fourth person limited (THIS ONE)
*February 24, 2015*

**Calculus**

A spherical balloon with radius 3 inches is partially filled with water. If the water in the balloon is 4 inches deep at the deepest point, how much water is released when the balloon hits the wall and breaks?
*February 18, 2015*

**physics**

Tom has a mass of 67.2 kg and Sally has a mass of 58.5 kg. Tom and Sally are standing 23 m apart on a massless dance floor. Sally looks up and she sees Tom. She feels an attraction. If the attraction is gravitation, find its magnitude. Assume both can be replaced by spherical ...
*January 24, 2015*

**Math**

Theo drove a slow car 996 miles to Oregon last spring and used a total of 40 gallons of gasoline. what was the average miles driven per gallon of gasoline? Do I divide 40/996 to get this answer?
*January 22, 2015*

**maths**

find the turning points for the curve y=2x^3-1/2x^2-x+5. Determine the nature of the turning points. Appreciate your help
*January 4, 2015*

**Physics**

The windpipe of a whooping crane is about 1.27 m long. Assuming that the pipe is closed at one end, what is the fundamental frequency of this pipe? Answer in Hz and use 340 m/s for the speed of sound.
*December 1, 2014*

**algebra**

simplify the expression show your work 3x(4x^4-5x)
*November 22, 2014*

**accounting**

Starbucks-. Locate the company’s annual report as outlined previously. Find the company’s segment information; it should be in the “Notes to Consolidated Financial Statements” or other similarly named section. Look for the word “Segment” in a ...
*November 20, 2014*

**physics**

A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +1.2. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror?
*November 6, 2014*

**physics**

A car weighing 1.0 x 10^4N is parked on a 34 degree slope. The brakes fail and the car starts to slide down the hill. Assume no friction. Show your work, and determine a) the acceleration of the car, and b) after it has moved 28.0 m, how fast is it moving?
*November 2, 2014*

**Math**

5 + y/6=8
*October 23, 2014*

**Algebra**

I'm not getting it. I've tried to re-read the notes but I'm still confused. Label each statement as "true" or "false". If "false" correct the underlined portion. 1) If *|n+9| <_4,* then n+9>_ 4 and n +9_<4 2) If y-x <5-x ...
*September 29, 2014*

**Chemistry**

15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.23M lead(II) nitrate solution. What mass of precipitate will form?
*September 28, 2014*

**Chemistry**

A 55.29-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? (Ignore significant figures for this problem.)
*September 28, 2014*

**Chemistyr**

A 55.29-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? (Ignore significant figures for this problem.)
*September 28, 2014*

**chemistry**

What volume of a 0.550 M solution of potassium hydroxide can be made with 18.3 g of potassium hydroxide? (Ignore significant figures for this problem.)
*September 28, 2014*

**Physics**

A motorcyclist traveling 35.0 m/s realizes suddenly that he is headed straight for the edge of the Grand Canyon 50.0 m away. He immediately begins to brake, decreasing his speed at a rate of 7.00 m/s^2. With what velocity will he fly off into the canyon?
*September 23, 2014*

**math**

One cubic meter (1.00 m3) of aluminum has a mass of 2.70E+3kg, and 1.00m3 of silver has a mass of 1.05E+4kg. Find the radius of an aluminum sphere whose mass is the same as that of an silver sphere of radius 1.07cm.
*September 7, 2014*

**chemistry**

What type of chemical rxn is Na2SO4(aq) +Ba(NO3)2(aq) the product is BaSO4(s) + 2NaNO3(aq)?what is its net ionic equation?
*September 3, 2014*

**Algebra**

please help Solve the equation if possible -2|3y+7|+9=5
*August 31, 2014*

**Algebra**

Please help. What is the x intercept of y+4=-4(x-2) I've gotten like 2 different answers: -3 and 1.
*August 24, 2014*

**science**

TS1 = 85 C xS1 = 0.5000 TS2 = 85 C xS2 = 0.0 ( saturated liquid water at 85 C ) Steam Table Data at 85 C : ---------------------------------------... T = 85 C Psat = 57.83 kPa hf = 355.90 kJ / kg hfg = 2296.0 kJ / kg hg = 2651.9 kJ / kg Get hS1 for the steam from the quality ...
*July 16, 2014*

**history**

damnon tyvm I think I found it... Idustrial Revolution
*July 13, 2014*

**history**

_______, or laying high taxes on imported goods, was one way the European government supported and aided its own economy during industrialization
*July 13, 2014*

**physics**

what is the heat required to convert 0.1 kg of melting ice into steam at 100 degree celcius
*May 20, 2014*

**math**

Sorry posted wrong thing. ____ ____
*May 6, 2014*

**math**

Math two/y=2 ___ ____
*May 6, 2014*

**chemistry**

What is the [CH3NH3+] of a solution which is 0.1003 M in CH3NH2 and 0.1204 M in CsOH? CH3NH2(aq) + H2O(l) « CH3NH3+(aq) + OH−(aq)
*May 6, 2014*

**chemistry**

What is the [C7H5O2−] in a solution which is 0.1283 M in HC7H5O2 and 0.1364 M in HBr? HC7H5O2(aq) + H2O(l) « C7H5O2−(aq) + H3O+(aq) Ka = 6.5000e-5
*May 6, 2014*

**chemistry**

What would Qc be if the volume of the container decreased by a factor of 1.774 for the following reaction? PH3(g) + BCl3(g) → PH3BCl3(s) KC = 534.8 at 353.0oC
*May 6, 2014*

**chemistry**

At 2273 K the equilibrium constant for the reaction 2 NO(g) « N2(g) + O2(g) KC = 2400 What would be the equilibrium concentration of N2 if the initial concentration of NO was 0.1778 M?
*May 6, 2014*

**chemistry**

At 674.5 K the equilibrium concentrations of N2, H2, and NH3 were 0.1614 M, 0.1128 M, and 0.005892 M, respectively. What is the equilibrium constant for the reaction below? 2 NH3(g) → N2(g) + 3 H2(g)
*May 6, 2014*

**science**

explain the Eutectic and Eutectoid reaction in cast irons
*April 18, 2014*

**science**

Identify and discuss the main safety legislation applicable to the installation, commissioning operating and maintaining the tube swaging machine.
*April 12, 2014*

**Derivatives**

G(t)=5200/(1+12e^(-.52t)) Find G'(t) I keeo getting (-32448e^(-.52t))/(1+12e^(-.52t))^2 Is this correct?
*April 2, 2014*

**Phsyics**

In a shipping yard, a crane operator attaches a cable to a 1130-kg shipping container and then uses the crane to lift the container vertically at a constant velocity for a distance of 30 m. Determine the amount of work done by each of the following. (a) the tension in the ...
*March 26, 2014*

**science**

what would happen to the impedance of a series circuit containing an inductor, capacitor and resistor if the supply frequency is varied from 0 to infinity Hz
*March 25, 2014*

**Physics**

D- Transverse
*March 24, 2014*

**Chemistry**

A mixture of NaCN and NaHSO4 consists of a total of 0.60 mol. When the mixture is dissolved in 1.0 L of water and comes to equilibrium the pH is found to be 9.7.
*March 9, 2014*

**Math**

A rocket is launched into the sky on a windy day. The rocket has a vertical velocity of 15 m/s. There is a strong wind blowing east to west at 35 m/s. How far from the start point is the rocket after 60 seconds?
*February 27, 2014*

**MATH ALGEBRA**

f(x)=6x^3+19x^2+8x-5 find all the zeros of the given function
*February 26, 2014*

**Chemistry**

For the reaction given, the value of the equilibrium of the constant at 400 K is 7.0. Br2(g)+ Cl2(g)=2BrCl(g) Does the: Reaction proceed to the left? Reaction proceed to the right? Partial pressure represent a system in an equation?
*February 21, 2014*

**Limits**

Let lim f(x) =16 as x->4 and lim g(x) =8 as x->4 Use the limit rules to find lim [cos(pi*f(x)/g(x))] as x->4
*February 20, 2014*

**Math**

Salmonella bacteria grows rapidly in a nice warm place. If just a few hundred were left on a cutting board when a chicken was cut up, and they get into the potato salad, the population begins compounding. Suppose the number present in the potato salad after x hours is given by...
*February 13, 2014*

**government**

Congress represents the larger public interest by (Points : 1)
*February 9, 2014*

**physics**

A car travels 3.0km due west and then 2.0km to the north. Find the magnitude and direction of the car’s resultant displacement?
*February 3, 2014*

**physics**

Two boys want to pull a car. One of them exerts a force of 200 N toward West. The other a force of 150 N toward south. What is the net force exerted on the car? (Assume friction to be negligible.)
*February 3, 2014*

**keiser university**

$164,712.31
*February 2, 2014*

**geometry**

if a 5-foot tall bush casts a 2-foot shadow how tall is a tree standing next to the bush that casts an 8-foot shadow at the same time?
*January 7, 2014*

**chemistry**

How many CO2 molecules are formed when 10 methanol molecules react?
*December 11, 2013*

**physics(URGENT!!!!!)**

8.01xers Can anybody help with the falling ruler. I submission left(
*December 9, 2013*

**physics(URGENT!!!!!)**

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m= ...
*December 8, 2013*