Saturday
October 25, 2014

Posts by Justin


Total # Posts: 764

chemistry
Calculate the pH of a 5.20 10-3 M solution of H2SO4.
November 28, 2010

chemistry
What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.68?
November 28, 2010

chemistry
You have 100.7 g of saccharin, a sugar substitute, and you want to prepare a pH = 5.80 solution. What volume of solution can be prepared? For saccharin (HC7H4NSO3), pKa = 11.70 (pKa = −log Ka).
November 28, 2010

Precalculus
1. What quadrant would the terminal side of the angle of t=4pie/3 be? 2. What quadrant would the terminal side of the angle of t=3pie/2
November 22, 2010

physics
A 2 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 115 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 115 kg mass dangles over the pulley, ...
November 19, 2010

biology
u sure?
November 18, 2010

biology
Why can maintaining homeostasis be particularly challenging for multicellular organisms?
November 18, 2010

HELP
How did the Indian reeducation movement affect young Native Americans?
November 17, 2010

physical science
In the cabin of a jetliner that travels at 600 km/h, a pillow drops from an overhead rack into your lap below. Since the jetliner is moving so fast, why doesn't the pillow slam into the rear compartment of the plane? What is the horizontal speed of the pillow relative to ...
November 15, 2010

Chemistry
A compound has the empirical formula CHCl. A 256 mL flask, at 373 K and 750. torr, contains 0.800 g of the gaseous compound. Give the molecular formula.
November 6, 2010

Chemistry
Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction. 2 NaN3(s) 2 Na(s) + 3 N2(g) What mass of NaN3(s) must be ...
November 6, 2010

Physics
1. A stroboscopic photo of a club hitting a golf ball, such as the photo shown in Figure 6.3, was made by Harold Edgerton in 1933. The ball was initially at rest, and the club was shown to be in contact with the club for about 0.0022 s. Also, the ball was found to end up with ...
November 6, 2010

Discrete Math
7.A group has 9 women and 7 men. d. Suppose 2 members of the group refuse to work together. How many subgroups of 5 can be chosen 8. In how many ways can 16 people be seated: a. In a row, if 4 of the 16 do not want to sit next to one another b. In a row, if 3 of the 16 must be...
November 4, 2010

Discrete Math
7.A group has 9 women and 7 men. d. Suppose 2 members of the group refuse to work together. How many subgroups of 5 can be chosen 8. In how many ways can 16 people be seated: a. In a row, if 4 of the 16 do not want to sit next to one another b. In a row, if 3 of the 16 must be...
November 4, 2010

Math
How do you solve: (-2t)^2(3t^7)^2
October 31, 2010

Math
If the sides of a square are lengthened by 7cm, the area becomes 121cm2. Find the length of a side of the original square.
October 31, 2010

chemistry
What volume of 0.0482 M Ba(OH)2 is required to neutralize exactly 16.10 mL of 0.141 M H3PO4? Phosphoric acid contains three acidic hydrogens.
October 28, 2010

chemistry
Calculate the sodium ion concentration when 72.5 mL of 4.4 M sodium carbonate is added to 32.6 mL of 2.5 M sodium bicarbonate.
October 27, 2010

physics
need some help, A ball with an initial angular velocity of 20.0 rads /s and a rotational inertia of 0.4kgm rolls uphill with an acceleration of -4.00 rad/s . Calculate the net torque acting on the ball. Calculate the angular displacement after 5.00 s.
October 18, 2010

physics
really confused, A 2kg box is sliding east at 50m/s on a frictionless floor when it collides with a 4kg box sliding east at 10m/s. After the collision, the 2 kg box is sliding east at 20m/s and the 4kg block is sliding east at 25m/s. Calculate the coefficient of restitution. ...
October 16, 2010

Math
Solve each equation by factoring: (2x+1)(3x-2)=10 How do you get -4/3 and 3/2 out of this equation? I'm so confused
October 12, 2010

Algebra
Solve the equation by factoring: 6y^2+7y-3=-12y^2-54y+4 The answers are suppose to be -7/2, 1/9
October 12, 2010

physics
A boy walks a total distance of 210 km due North. His starting position is at 20 km and his final position is 34 km. If it takes him 3 hours and 20 minutes to make his trip, what is his velocity? What is his speed?
October 6, 2010

Physics
A skateboarder shoots off a ramp with velocity of 6.5 m/s directed at a 59 degree angle. The end of the ramp is 1.3m above the ground. a)How high above the ground is the highest point that the skateboarder reaches? b) When the skateboarder reaches the highest point, how far is...
October 5, 2010

6th grade
if you had between 3 and 100 shells and counted by 3's, 4's and 5's and had 2 left over each time how many shells would you have
September 29, 2010

5th grade
The statment means that the elements that form the salt are completely different when they aren't formed into salt. For example, when the element A, B, C are put together they can form salt, but when if you just looked at A it would be different from the salt because it ...
September 27, 2010

social studies
two examples of lines of lattitudes which can be found on a map?
September 25, 2010

college physics
A 78-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.74 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest...
September 21, 2010

ethics
What is virtue and how do we acquire it? this is according to aristotle
September 20, 2010

science
on myth busters there was a,project "people escaping from jail using real hair,toilet paper,and sheets i need the independent,dependent,and control variable on each
September 19, 2010

science
i need the independent,dependent ,control group variable on a cat always landing on their feet
September 19, 2010

music
health ins is so you can go to the dr or hospital and wont cost as much as self pay,,disability ins is if you get injured your still covered even if your not working,,life ins is so your funeral arragment will be paid for and tour family wont be struggling with bills after ...
September 19, 2010

ethics
what does kant mean by a good will without qualification?
September 13, 2010

algebra
How big is the solution set for an equation that cannot be solved
September 9, 2010

math
a fireman stood on the middle step of a ladder, shooting water into a burning building, as the smoke lessened, he climbed up 3 steps, and continued his work, the fire got worse, so he had to go down 5 steps, later he climbed up the last 6 steps and was at the top of the ladder...
September 5, 2010

math
danny has a money market account with $1,200. the bank offered him a special rate of 5.25% per month. how much money will danny have after the first month
August 5, 2010

college differential equations
Find two linearly independent power series solutions to the diffrential equation. State the first 3 therms of each series: 2x^2y''+xy'-(1+2x^2)y=0
July 28, 2010

algebra
Oh hey im taking algebra.
June 3, 2010

calculus
Sorry for the misunderstanding. The X is a multiplication sign and the 4 is multiplied to the cubed root of 3.
May 23, 2010

calculus
Write the complex number -4 x 3^1/3 - 4i in exponential form. I'm not sure how I use euler's formula to solve for this. A brief explanation would be greatly appreciated.
May 23, 2010

Math
Which of the following conditions does not ensure that a quadrilateral is a parallelogram? A) Both pairs of opposite sides are parallel. B) The diagonals bisect each other. C) A pair of opposite angles are congruent. D) All of the above Can anyone tell me if C is the right ...
May 23, 2010

Math/Albebra
Give the equation of the circle with the given center and radius. Center at (0, 0); radius = 5
May 16, 2010

U.S. and Global Economics
(This homework question was removed due to a copyright claim submitted by K12 Inc.)
May 13, 2010

human growth and developmnet
it is stupid
May 12, 2010

Intro to visual business
What specific visual film techniques do you see utilized in contemporary television?
May 10, 2010

Chemistry
Itz Balanced.
May 3, 2010

CHEMISTRYYY
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
April 26, 2010

Chemistry!
a)consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP? b) What is the freezing point of an aqueous solution that boils at 102.1 C?
April 26, 2010

Chemistry
What is the freezing point of an aqueous solution that boils at 102.1 C?
April 26, 2010

algebra
I was wondering what the answer to this is. (x-7)3 3 means it is cubed i workedit out but i was wondering what it might be.
April 20, 2010

Math
Factor each expression completely. Can you please show me the steps for these. I'm so confused and don't know how to do them. Thank you so much!! kx^3+2kx^2-63kx and 3xz^2+42xyz+99xy^2
April 16, 2010

math
this year Ben is 4/7 as old Glen. Fifteen years fromnow Ben will be 3/4 as old as Glen. At that time he sum of thier ages will be 63. How old are Ben and Glen now?
April 16, 2010

math
15over51 in simplest form
April 16, 2010

6th grade
perplexed,mystifiedor puzzled
April 15, 2010

science, 7th,6th,8th,9th grade
Less time, less people to operate machines, and less cost to company due to training the different people to manage the job.
April 15, 2010

Chemistry
i dont think u can draw on this website lol
April 14, 2010

uhh help
oh ok well im about to go to sleep i didnt notice my comment was so rude i was just speakin my mind if u did take it to offence i am sorry :(..
April 14, 2010

confuseddddd
how come these comments keep earasing???0_confused
April 14, 2010

uhh help
yea i kinda was is just that im in a rush and wanna get this booklet done lol >-< ___
April 14, 2010

uhh help
the legendary king midas was a: a.very beautiful b.very rich man c.very wise man d.very brave man i choose c??
April 14, 2010

help plz:)
ok so if its not d or b then its eathier a or c correct haha soo i say c lucky guess?>what do u think lmao
April 14, 2010

help plz:)
im sorry i meant to say b lol
April 14, 2010

help plz:)
which statement does NOT describe how greek words entered english? a.they have been formed by combining greek elements. b.they have come indirectly by way of latin. c.they have come indirectly by way of german d.they have been borrowed directly from greek writers. i choose d???
April 14, 2010

English-Your thoughts count
yea i agree with ms.sue the writer is bascially telling a story about how her life is growing,,lol
April 14, 2010

English-Your thoughts count
i think the line is trying to say the writer is seeing its life grow day by day as if it was a blooming flower.like if he was a catapila growing into a buterfli no disrespect but i think u r WAY off lol
April 14, 2010

latin BASES
lol ur funny but thank you
April 14, 2010

latin BASES
which latin base means head? a}GNO- b}LOC- c}CAPIT d}ROG- p.s.what do u think? i choose c :)
April 14, 2010

help plz
monique n--ok monique n but i dont see any of the questions u posted sorry :( ms.sue--yea i did but i couldnt seem to find the answer.but thank u anyway confused--thank you for your help:)
April 14, 2010

help plz
thx i will posting more questions so if u can help go right ahead lol
April 14, 2010

help plz
Which word is a synonym of the word evolve? a}recession b}decline c}progress d}retrogression p.s.ive been working on this same question for 1 month todaysthe last day i have can some1 plz just give me the answer plzzz lol btw:who likes boxing?0_o
April 14, 2010

chem101
50.0ml of 0.10M HCL{aq} was added to 40.0ml of 0.10M NaOH{aq} and the mixture was stirred,then tested with a pH meter.What reading should be obtained for pH at 25.0degrees celcias?
April 5, 2010

algebra
(a+b)(a-2b)
March 26, 2010

Physics- due tomorrow
Two wires have current both running in the positive x direction as shown in the diagram with I1 = 13.9 amps and I2 = 4.5 amps. They are separated by a distance of d = 4.7 meters. A third wire with I3 = 10 amps is placed somewhere between the two wires with current running in ...
March 24, 2010

Physics
Two infinitely long wires are separated by a distance of d = 1.4 meters. Both have current running in the positive y direction. A charge of q = +2.7 micro-Coulombs is moving in the positive y direction at v = 3.1 E 6 m/s a distance of r = 0.22 meters from the wire on the left ...
March 23, 2010

Physics
ok thanks that is what i thought it might be but i just wanted to make sure. I also have another problem that i am hoping that you could help me with. A car requires 30 horsepower to move at a constant 20m/s what is the amount of friction that is needed to overcome?
March 9, 2010

Physics
An arrow with a mass of 30g is shot straight up to a height of 130m what is the arrow's initial velocity?
March 9, 2010

AP Physics
A merry-go-round rotates at the rate of.2rev/s with an 80kg man standing at a point 2m from the axis ofrotation. (A)What is the new angular speed when the man walksto a point 1m from the center? Assume that the merry-go-round is a solid 25kg cylinder of radius of 2m. B. ...
March 4, 2010

Physics(Please help)
Forces between like molecules, such as the force between water molecules.
March 4, 2010

physics
In the high jump, Fran's kinetic energy is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must Fran leave the ground in order to lift her center of mass 1.95 m and cross the bar with a speed of 0.70 m/s?
March 3, 2010

physics
How much work must be done to stop a 1150-kg car traveling at 145 km/h?
March 3, 2010

physics
what is mu?
March 3, 2010

physics
What is the minimum work needed to push a 850 kg car 940 m up along a 9.5 degree incline? Part A: Ignore Friction Part B: Assume the effective coefficient of friction retarding the car is 0.20.
March 3, 2010

physics
What is the maximum speed with which a 1200-kg car can round a turn of radius 68 m on a flat road if the coefficient of static friction between tires and road is 0.80?
March 3, 2010

physics
i put 1023.04 as the answer and it said it was wrong
March 3, 2010

physics
1023.04 N/M
March 3, 2010

physics
A 1300-kg car rolling on a horizontal surface has speed v = 65 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.3 m. What is the spring stiffness constant of the spring?
March 3, 2010

physical
What is pressure point?
February 28, 2010

Science
Is it ever possible to be completely healthy?
February 21, 2010

crt
someone help me it c or a f on my final grade
February 18, 2010

crt
Exercise 6-6 Identify any examples of fallacies in the following passages. Tell why you think these are fallacies, and identify which category they belong in, if they fit any category we’ve described. 1. Letter to the editor: “I would like to express my feelings on ...
February 18, 2010

Physics
A fisherman's scale stretches 4.2 cm when a 3.0 kg fish hangs from it. What will be the amplitude and frequency of vibration if the fish is pulled down 2.3 cm more and released so that it vibrates up and down?
February 18, 2010

CRT 205
Exercise 6-6 Identify any examples of fallacies in the following passages. Tell why you think these are fallacies, and identify which category they belong in, if they fit any category we’ve described. 1. Letter to the editor: “I would like to express my feelings on ...
February 18, 2010

math
Six
February 11, 2010

Math
Find all points with integer coordinates that are a distance of square root of 29 from (-4,3) how do u do this?????!?!?!?!
February 11, 2010

french
unscramble letters to create a french word: sforpti
February 9, 2010

Science
A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that a bushel contains about 90 000 kernels on average. ...
February 8, 2010

pyschology
Those in late adulthood suffer depression at a higher rate than any other age group. Which is the strongest predictor of depression?
February 6, 2010

pyschology
As we age, our physical functioning deteriorates. This is most likely due to reduced efficiency in basic cellular processes. One cause of this is thought to be:
February 6, 2010

Pyschology
Considering what studies reveal about personality and how it can affect development, which of the following is true?
February 6, 2010

Pyschology
Morgan is a 57-year-old man whose children are off at college. According to Erikson, in order to fully develop generativity in middle age, Morgan needs to:
February 6, 2010

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