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Posts by Sean

Total # Posts: 680

Math
Donna is one year older than her sister, and her sister is 3 years older than their brother. If the sum of their ages is 31, how old is Donna?

Science
Lol I meant does*

Science
How dos the pull of a magnet work PLEASE ANSWER I NEED TO TURN THIS IN BEFORE JUNE 9th thank you!!

Chemistry
What would be the effect on Ksp if an unsaturated solution of CaSO4 was titrated instead of a saturated solution of CaSO4. would ksp be higher, lower or the same? would ksp be higher due to the more ions available in the solution. so you would have to use more titrant to equal...

intermediate algebra
inequalities –1 ? x – 3 ? 5 –2x – 5 < –2 or x – 3 < –10 Be careful of how a negative x-term is handled in the solving process. Show all math work arriving at the solutions. •Show the solution sets written algebraically and as a ...

intermediate algebra
Inequalities –1 ? x – 3 ? 5

Chemistry
Larger. I dont know what i was thinking. i really overlooked that one. thank you

Chemistry
In a titration experiment what would be the result on the concentration of the analyte if the drop counter did not count all the drops? would it be lower since you would just be calculating the concentration at the same point on the curve just with a lower volume of titrant?

Math
What object weighs one ounce? 1. Car 2. Newspaper 3. Dog 4. Button plzz help Conexus 2nd grade.

Chemistry
what volume of .422 M NaOH must be added to .500L of .300 M acetic acid to raise its ph to 4.00 i know you have to use the henderson hasselbalch equation but im not sure which values i would use for the concentration portion of the equation. would i have to change the ...

Chemistry
thank you

Chemistry
which salt solution would have the highest ph and why KI,KBr,KF,KCL or they all have the same ph. Im leaning towards KF since im pretty sure the other salts are neutral?

Chemistry
Rxn 1:     4 NH3(g) + 5 O2(g) ? 4 NO(g) + 6 H2O(g)         If the equilibrium constant, Kc, for Rxn 1 is 0.0015, determine the equilibrium constant, Kc, for the    reaction:   2 NH3(g) + 5/2 O2(g...

Grade 8 Lang Arts
The story is "Trouble With Television" It has become fashionable to think that, like fast food, fast ideas are the way to get to a fast-moving, impatient public. How does the repetition in the sentence convey the author's negative attitude toward television. I ...

8 Grd L.A.
oops sorry hold on :)

8 Grd L.A.
How does the repetition in the preceding sentence convey the author's negative attitude toward television? I think it shows how the author thinks negatively about television.

8 Grd L.A.
"When before in human history has so humanity collectively surrendered so much of its leisure to one toy, one mass diversion?" How would you answer the rhetorical question? ____________________________________________________________________________ I'm thinking ...

Chemistry
why does chlorobenzoic acid have a lower freezing point than benzoic acid explain? would this have something to do with the intermolecular forces or polarity. I know that the chlorobenzoic acid a Cl atom in the molecule which would create for a stronger intermolecular force ...

Chemistry
What volume of 0.1244M hydrochloric acid is required to neutralize 24.81 ml of 0.1026M barium hydroxide? from the mole to mole ratio and the given information I came up with .00509 mols of HCl. would I multiply this by 0.1244 or divide by .1244. I'm not sure which would be...

math
4 1/2 x 2 1/4 =

History please help!
I don't know but I don't care either

Social Studies
yes

math
If you roll a number cube 40 times, about how often can you expect to roll a 2?

Math
I'm 96% positive the answer is 9/32

Chemistry
How do i find the PH and pOH of 12.5ml of 15.8M HNO3 added to 400ml of 0.57M KOH

Chemistry
I don't get what i have to do at all, or what the 1.20-2x=1.02 gives me?

Chemistry
Consider the reaction: 2H2+2NO->N2+2H2O. Initially 1.20mol of H2 and 0.95 mol of NO are placed in a container(all reactants and products are gases). If after 5 seconds the amount of H2 has been reduced to 1.02mol then how much NO is left and how much N2 and H2O has been ...

Math/Precsl
Solve: log(8y+12)=2

Language Art, please check!
Wow, thank you Ms. Sue! ;)

Language Art, please check!
1. Tiny Tim’s father, Bob Cratchit, works for Scrooge. What is the appositive in this sentence? Tiny Tim father Bob Cratchit *** Scrooge 2. The Ghost of Christmas Future, the third spirit, takes Scrooge to see his grave. What is the appositive phrase in this sentence? ...

math
is apportionment the best way to achieve fair representation?

Chemistry
If the percent yeild of the following equation is 55%, how many grams of H2SO4 are produced when 4.88 x 10^24 molecules of SO3 are combined with excess water? SO3(g)+H2O(l)->H2SO4(aq). what would be the formula to solve this equation

Chemistry
How many grams of pure uranium can theoretically be extracted from a 10.0 kg sample of pitchblende, which is 92.0% UO2? Im not looking for the answer. I would just like to know the formula to solve the problem.

Chemistry
A Partially weather balloon has a volume of 195 L at a pressure of 0.993 atm. What will be the pressure in the balloon when it is inflated to a volume of 7500 L? (assume to temp. change)

Algebra
I am really stuck with creating the equation

Algebra
A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to A, if the entire ...

Algebra
A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist traveled for 10 hours less than on the raft. Find the speed of the current if the speed of the motorboat in still water is 12 km/hour.

math
Finn is 9 years younger than Pari. Pari is twice as old as Finn. How old is Finn?

trig
49.67

trig
93.33

language arts
what is the most impressive example of anne's inner strength in act 2?

chemistry
He has narrowed the identity of his unknown to either molecule X, molecule Y, or molecule Z. The Merck Index tells him that all three molecules produce white, needle-like crystals from ethanol. How might he definitively identify his unknown molecule?

physics
an operating 100-watt lamp is connected to a 120-volt outlet. what is the total energy used by the lamp in 60. seconds

Math
Upon retirement (in 40 years) you want to receive $10,000 each month for a period of 28 years. This money resides in an account that pays 5.9% interest. How much money must be in the account to fulfill your goal?

Mathematics
Show that the equation tanθ = sinθ can be written in the form sinθ(1 - 5cosθ) = 0?

Mathematics
Solve 2cos^2(x) + 4sin(x)-3 = 0, giving all solutions in the interval 0 ≤ x ≤ 2π

Mathematics
Given that 2cos^2 x - 3sin x -3 = 0, show that 2sin^2 x + 3sin x +1 = 0? Hence solve 2cos^2 x + 4sin x - 3 = 0, giving all solutions in the interval 0 ≤ x ≤ 2π

Calculus
A tennis ball is dropped from a height of 32 feet, rebounding to 1/2 its former height with each bounce. How far will the ball have traveled VERTICALLY when it comes to a rest?

Algebra
If a certain number is added to the numerator and denominator of 11/13, the result is 11/12. Find the number.

Physics
A block of 3kg is pulled up a smooth slope with a force of 24N and the slope is of an angle 25 degrees. Calculate the acceleration of the block up the slope.

Physics
A car traveling at a velocity of 2m/s undergoes an acceleration of 4.5m/s2 over a distance of 340m.How fast will it be going after the acceleration?

Physics
A car of mass 1300 kg is driving along a road at speed of 28m/s. As it approaches some traffic lights, the lights change to red and the driver applies his brakes causing the car to skid. The frictional force between the skidding tyres and the road is 0.8 of the weight of the ...

Physics
A car of mass 1300 kg is driving along a road at speed of 28m/s. As it approaches some traffic lights, the lights change to red and the driver applies his brakes causing the car to skid. The frictional force between the skidding tyres and the road is 0.8 of the weight of the ...

Physics
A man runs east 9.8 m/s for 11 s, stops for 6.9 s, then runs back (west) at 1.5 m/s for 1.2 s. What is the man's average velocity?

Physics
A soccer ball is kicked with resultant velocity of 22.6 m/s at an angle of 60 degrees. What is the time to Apex, what is the range of the kick? r = 22.6 angle = 60 degrees 1)Vxi=sin(60)(22.6) = 19.57 Vyi=cos(60)(22.6) = 11.3 2)T= Vyf-Vyi/A 0-11.3/-9.81 = 1.1 sec time to apex ...

Math
The circumference of a rear wheel of a carriage is 50 inches more than a front wheel. If the rear wheel makes as many revolutions in going 200 feet as the front wheel in going 120 feet, find the length of the circumference of each wheel.

Math
In a third game. Javier first two darts land in R what is the maximum possible score in this game

geometry
yes you're correct

STATISTICS
According to the DPT of Health Services , 12% of 30-39 have depression. Suppose 3 30-39 year olds are selected randomly what is the probability that all three will have depression.

Math
Find equations of the osculating circles of the ellipse 9x^2+4y^2=36 at the points (2,0)&(0,3).

Math
Find the curvature x=t^2, y=t^3 Using k=|xÿ-yx|/(x^2+y^2)^3/2

Differential Equation
Given A=2i+3j and B=4i-j Compute for the following a. |a|+|b| b. 5A-6B c. |5A-6B| d. |5A|-|6B|

Math
Alice takes 4 hours to paint a wall. With sam's help, they can paint the wall in 3 hours. Without help, how long would it take Sam to do the same thing?

Trigonometry
y = + or - 3 cos (2 theta + 3/2 pi) - 3 is my answer

Trigonometry
Write an equation of the cosine function with the given amplitude, period, phase shift, and vertical shift. amplitude = 3, period = pi, phase shift = -3/4 pi, vertical shift = -3

Trigonometry
Find tan theta if theta is an angle in standard position and the point with coordinates (–12, 5) lies on the terminal side of the angle.

algebra
g(x)=5, find g(-4) g(-4)=5 -4g=5 g=-1.25

ALGEBRA
Jan plans to invest $7500, part at 4% simple interest and the rest at 5% simple interest. What is the most that he can invest at 4% and still be guaranteed at least $325 per year?

ALGEBRA
Find the distance between the points (-2, 3) and (4, -5)

Physics
An equal amount of heat is transferred to two containers containing water at the same temperature. If the second container contains three times as many water molecules as the first, how do the final temperatures compare?

Physics
A liter of water is used to cool some electronics. If 1000 J of heat is given off by the electronics, by what temperature does the water increase? One liter of water has a mass of 1 kg and a specific heat of 4.184 J/(g °C). I can not get this..please help

algebra
If f(x) and g(x) are two functions defined by f(x) = ã(x + 1), g(x) = | x - 1 |, then what is the value of f(g(9))?

College algebra
. If i = ¡Ì-1, then (i + 1)(6i ¨C 10) is equivalent to?

College Algebra
The function w(x) = -0.01x² + 0.27x + 8.60 can be used to estimate the number of self-employed workers in America in millions, x years after 1980. For what years were there (or will be there) 9.7 million self-employed worker in America?

math
The area of a triangle is 600 square feet. Find the altitude, in feet, of the triangle if the length of the corresponding base is 30 feet.

math(5th grade)
1/2 x 1/4 = 1/8 are 5th grade boys

Algebra 1
Seiji and Gavin both worked hard over the summer. Together, they earned a total of $425. Gavin earned $25 more than Seiji. Hoe much did each of them earn? A. Write a system of two equations to model this program. I got 1 equation down, i just cant figure out the second

Physics
A cannon is fired at 30 degrees above the horizontal with a velocity of 200 m/s from the edge of a 125 m high cliff. Calculate where the cannonball lands on the level plain below.

Physics
A 3kw engine operates for 3secs, 10kgf force is applied find the Displacement.

Physics
Converging lens has focal lenght 8 cm , at what distance you will have to place the object in the following devices; 1) Collimator of Spectrum 2) Terrestrial Telescope

Physics
A mass of 0.55 kg attached to a vertical spring stretches the spring 36 cm from its original equilibrium position. The acceleration of gravity is 9.81 m/s2 . What is the spring constant? Answer in units of N/m.

Chemistry
Is the boiling point of 0.01 m potassium fluoride solution higher or lower than that of 0.01 m glucose solution? Explain

computer science
The components of a traditional analysis model (data flow diagrams, process definitions, entity-relationship diagrams, and data definitions) were developed in the 1970s and 1980s as part of the traditional structured analysis methodology. How well do the components fit ...

Systems Analysis
This is the question that was asked: The components of a traditional analysis model (data flow diagrams, process definitions, entity-relationship diagrams, and data definitions) were developed in the 1970s and 1980s as part of the traditional structured analysis methodology. ...

art history
That's the answers I would agree with for your study guide. All the other answers for the choices on #7, I could disprove, but I could find nothing to prove this one correct.

art history
1. Yes, but could find no resources to confirm for you. 2. No, and there's a resource that helps describe it... 3. Yes, this was a no-brainer for me. However, I found no specific resource to back it up. I would go with this answer if it were me. 4. No, and there's a ...

statistics
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. Many complain that the time devoted to previews is too long (The Wall Street Journal, October 12, 2012). A ...

physics
That didn't answer the question

physics
A cannon fires a 0.598 kg shell with initial velocity 10 m/s in the direction 46◦ above the horizontal. The shell’s trajectory curves downward be- cause of gravity, so at the time t = 0.53 s the shell is below the straight line by some verti- cal distance ∆h. ...

Math: Statistics
12

physics
A 1.0-kg cart and a 0.50-kg cart sit at different positions on a low-friction track. You push on the 1.0-kg cart with a constant 2.5-N force for 0.15m . You then remove your hand, and the cart slides 0.35 m and strikes the 0.50-kg cart. By what amount does your force change ...

science-chemistry
An aqueous solution of ammonium nitrite decomposes when heated to give off nitogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was colleced over water at 25˚C ...

Chemistry
An aqueous solution of ammonium nitrite decomposes when heated to give off nitrogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was collected over water at 25˚C ...

chemistry
Can someone help me with Chemistry Homework Due Tomorrow, Its about the Electrolysis of Hydrochloric Acid Practical we did and I Have to write a summary and I don't get what we did Y10 GCSE Higher Tier

Chemistry
The speed of light in a vacuum is 2.998 x 10^8 m/s. What is the speed of light in miles per hour? (1 km = 06214 miles)

economics
f f t t

Physics
The hare and the tortoise are at the starting line together. When the gun goes off, the hare moves off at a constant speed of 10 meters per second. (Ignore the acceleration required to get the animal to this speed.) The tortoise starts from a dead stop, but accelerates at a ...

Physics
A train is moving parallel and adjacent to a highway with a constant speed of 22 m/s. Ini- tially a car is 35 m behind the train, traveling in the same direction as the train at 36 m/s and accelerating at 4 m/s2. What is the speed of the car just as it passes the train? Answer...

Physics
v= 61.3m/s at max h straight line= 264.1m

Physics
466 N

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