Saturday
November 22, 2014

Posts by Laura


Total # Posts: 1,038

chem
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 5, 2011

chem
A 0.0097561 g quantity of an unknown gas occupies 0.2 L at 500 K and 2 atm. What is the Molecular Weight (MW) of the gas ?
December 5, 2011

chem
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 5, 2011

chem
A 0.0097561 g quantity of an unknown gas occupies 0.2 L at 500 K and 2 atm. What is the Molecular Weight (MW) of the gas ?
December 5, 2011

chemistry
A fixed amount of gas initially at 100 K and pressure P1 is expanded from 1 L to 100 L in a piston. The temperature, T2, of the gas at this point is 50 K. The piston is then locked at constant volume V2=100 L and half the gas is pumped out at a constant temperature of T2 . The...
December 5, 2011

chemistry
1 gram of C3H8 gas and 1 gram of O2 gas are delivered to a metal sphere with a fixed volume of 1 L. After the two gases are introduced, the two reactants are ignited and burned according to the balanced reaction C3H8(g)+5O2(g)changes to3CO2(g)+4H2O(g) After reaction, the ...
December 5, 2011

chemistry
The valve between a 5 liter tank in which the gas pressure is 911.925 kPa and a 10 liter tank containing gas at 4560 torr is turned open and equilibrium is established at constant temperature. What is the final pressure in the two tanks in atmospheres?
December 5, 2011

physics
Consider the 671 N weight held by two cables shown below. The left-hand cable had ten- sion T2 and makes an angle of 47 with the ceiling. The right-hand cable had tension T1 and makes an angle of 43 with the ceiling. a) What is the tension in the cable labeled T1 ...
December 3, 2011

physics
1.1sin47 + t2sin43 = 671 .804 + t2sin43 = 671 t2sin43 = 670.196 t2 = 982.694 Im really getting frustrated with this and its due at 11 pm tonight. Please help me. Is t1 right though??
December 3, 2011

physics
t1cos47 + t2cos43 = 0 t1cos47 = t2cos43 t1 = 1.1 t1sin47 + t2sin43 = 671 t2sin43 = 490.7 t2 = 719.6 I really have no idea how to do this
December 3, 2011

physics
T2 = 719.6 ??
December 3, 2011

physics
T1 = 1.1 ??
December 3, 2011

physics
I know that but I just dont get it
December 3, 2011

physics
How do you solve for them though? Thats what Im stuck on
December 3, 2011

physics
Consider the 671 N weight held by two cables shown below. The left-hand cable had ten- sion T2 and makes an angle of 47 with the ceiling. The right-hand cable had tension T1 and makes an angle of 43 with the ceiling. a) What is the tension in the cable labeled T1 ...
December 3, 2011

short story paper
yes ma'am lol thanksss im going to try to work on outline i guess
December 2, 2011

short story paper
my mom said to ask if u tutor pvt online or just in this type of setting? and she told me to say yes maam lol
December 2, 2011

short story paper
do you notice a difference ever when talking or chatting with southern kids vs northern when they are chatting with u?
December 2, 2011

short story paper
thanks miss sue i know i got a lot of yes whats? when i first got here lol
December 2, 2011

short story paper
what do u mean? forget about the maams and sirs and write about other stuff?
December 2, 2011

short story paper
oh sory i didnt see your response
December 2, 2011

short story paper
guess dumb
December 2, 2011

short story paper
or does it sound dumb//?
December 2, 2011

short story paper
I moved to the south I'm supposed to write about changes I'm thinking Yes ma'am or No ma'am? What do you think. It's expected here but not before
December 2, 2011

short story paper
hi is anyone here? Wanted to try out a topic
December 2, 2011

statistics
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. I need more than the answer. I'm looking for help on the steps to get to the answer, please. Thanks
December 1, 2011

alegebra
Apply the rule (1.5x,1.5y)to the verticies of triangl ABC (0,2)=A (6,2)=B (4,4)=C to get triangle PQR
December 1, 2011

physics
A River Is Flowing at a velocity of 0.15 m/s west. a swimmer swims against the current at a velocity of 0.22 east, how manyu hours will it take him to swim 1 km?
November 26, 2011

5th math
14.4. Estimate low and high find product X6.2 ______
November 21, 2011

Reading (hellp!)
Can you give me a 6th grade sentence using the word calico,and a sentence using the word bravado please! ! !
November 21, 2011

Math
A famous detective was called in to solve a baffling murder mystery. He determined there was only one cause of death along with the following facts: a.Mr. Harold, the murdered man, was killed by a blow on the head with a brass candlestick. b.Either his wife, Mrs. Harold, or a ...
November 10, 2011

Math
ok sorry about that
November 10, 2011

Kinesiology
what is the torque generated to hold a 60N dumbell at 90 degrees? The dumbell is 0.6m from the shoulder, the centre of the mass of arm weighs 30N and is .25m from the shoulder, the moment arm is 0.05m?
November 9, 2011

statistics
we have a normal distribution with mean 76 and standard deviation 6.4, find the percent between 69.6 & 76?
November 8, 2011

Living Environment
Well, some abiotic factors in Ethiopia are: Volcanoes (lava) Sulfuric acid In Patagonia: Snow Volcanoes Wind Rockies: Snow Pakistan/Himalayas: Ice Snow Rocks Forests of China: Snow Wind
November 8, 2011

calculus
let f(x)= 9(x/(x-1)square)= 9x/ x square-2x+1 find the domain of f and compute the limit at each of its endpoint. then list all horizontal and vertical asymptotes
November 3, 2011

medical
accreditation affect the practical activities of record management in hospitals
November 1, 2011

english
thank you!
October 30, 2011

english
what's the difference between a major character and a minor? Is a minor like every other character besides the major characters?
October 30, 2011

math
find the area of a rectangle whose length is 3x and width is 4x +6
October 21, 2011

religion
what did hebrews do to please their gods?
October 20, 2011

child day care
of the forms used in a child care program which of the following would be required for the children?
October 18, 2011

french
I need help unscrambling these french words: srteelt, sbrtmie and eiuocrrl. thank you for helping :)
October 17, 2011

Physics
vf^2=2*9.8*520 vf=100.955 ??
October 12, 2011

Physics
A wrench falls out of the gondola of a balloon that is 520 m above the ocean. Assuming negligible air resistance, what was the wrench’s speed as it hit the water? The acceleration of gravity is 9.8 m/s2 .
October 12, 2011

chem
Use a temperature - composition diagram to explain why fractional distillation of two components is more easil? easily accomplished if the components have boiling points that differ by 20*C or more.
October 7, 2011

algebra
Thanks Ms. Sue
October 2, 2011

algebra
3/4 of a number is 1/2. Find the number in the lowest terms... please show work I am confused
October 2, 2011

algebra
Please help....struggling with word problems and please explain how to get the answer.... Max has a collection of 210 coins consisting of nickels, dimes, and quarters. He has twice as many dimes as nickels, and 10 more quarters than dimes. How many coins of each kind does he ...
October 2, 2011

Physics
A ball rolls off a table moving 3.6m/s in the horizontal direction. The table is 1.2 meters high. Find the amount of time needed for the ball to hit the ground.
October 2, 2011

Human Resource Management
Can someone give me an example of due diligence in human resources
September 28, 2011

Math
Jack is decorating for a party. He has 125 feet of paper streamers to use over 3 doorways. He will use the same amount for each door. How many feet will he use in each?
September 27, 2011

Chemistry
if one mole of gas occupies 22.4L at STP what is the volume at 25 degress C. and 3.05 atmosphere?
September 25, 2011

physics
A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.5 m/s squared. At the same instant, a car passes the truck going 15 m/s. Where and when does the truck catch up with the car?
September 23, 2011

chem
a.What advantages does ligroin have over n-pentane as a recrystallization solvent? b. What advantages foes ethanol have over n-octanol as a recrystallization solvent?
September 21, 2011

business
Assignment Type: Individual Project Deliverable Length: 500–750 words Points Possible: 110 Due Date: 9/11/2011 11:59:59 PM CT You are a marketing manager interviewing for a new job at several different firms simultaneously. You expect to be asked the same questions in ...
September 21, 2011

chem (urgent)
Can someone please explain to me in simple terms what the eutectic point and temperature are?
September 16, 2011

algebra 1
38/100=x/800 set it up as a proportion so you cross multiply and get (38)(800)=100x 30400=100x soooo 304 kids like chocolate
September 14, 2011

Algebra
y=29+.32x
September 14, 2011

Tulane Physics
a rock is thrown unward off a cliff at a 45 degree angle. THe rock falls back to the elevation it was thrown from after 3.56 seconds. It hits the water 5.31 seconds after it was thrown. How high is the cliff? what is the horizontal distance from the cliff to the point in the ...
September 14, 2011

Math
yes! cuz its the absolute value of that equation, the numbers are just inverses of one another. so if A is 4 and B is 5 then 4-5 is -1, which would become 1 5-4 is 1, which remains 1 10-5 is 5 5-10 is -5, which becomes 5. they always stay the same. without the absolute value ...
September 14, 2011

Chemistry
I am having trouble balancing the following equation using the Ion-Electron Method. Se(solid) + HNO3(aqueous) ----> SeO2(solid) + NO(gas) + H2O(liquid) Can you explain the steps that you have to take to solve it?
September 12, 2011

physics
How long does it take an automobile traveling 68.3 km/h to become even with a car that is traveling in another lane at 54.3 km/h if the cars’ front bumpers are initially 121 m apart? Answer in units of s.
September 8, 2011

statistics
a pouch contains 97 green beads 72 red beads and 7 yellow beads. how many blue beads should be added so that the probability of drawing a red bead is 3/10 ?
September 5, 2011

science
4.444444444444
August 23, 2011

physics
A motorcycle officer hidden at an intersection observes a car driven by an oblivious driver who ignores a stop sign and continues through the intersection at constant speed. The police officer takes off in pursuit 1.98 s after the car has passed the stop sign. She accelerates ...
August 18, 2011

physics
A passenger train is traveling at 30 m/s when the engineer sees a freight train 357 m ahead of his train traveling in the same direction on the same track. The freight train is moving at a speed of 5.9 m/s. (a) If the reaction time of the engineer is 0.43 s, what is the ...
August 18, 2011

physicsHELP!!!
Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel ...
August 17, 2011

physicsURGENT!!!!!!
Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel ...
August 17, 2011

physics
Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel ...
August 17, 2011

physics
A bus accelerates at 1.4 m/s2 from rest for 10 s. It then travels at constant speed for 26 s, after which it slows to a stop with an acceleration of magnitude 1.4 m/s2. (a) What is the total distance that the bus travels? (b) What was its average velocity?
August 17, 2011

health
How does technology improve our ability as health care organizations to market ourselves in our communities
August 16, 2011

Calculus
a) Find the Taylor series associated to f(x) = x^-2 at a = 1. Be sure to show the general term of the series. b) Find the radius of convergence of the series. c)Use Lagrange's Remainder Theorem to prove that for x in the interval of convergence with x > 1; the power ...
August 8, 2011

chemistry
a compound x has a solubility of 79g/100 g h20. when 24 g of x are added to 68 g of water the resulting mixture is homogeneous or heterogenous
August 2, 2011

algebra
x^3+216
July 17, 2011

CAL
At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)
July 10, 2011

History
What was the most important foreign policy goal of the United States between 1945 and 1990?
June 7, 2011

History
Why did some senators oppose the participation of the U.S. in the League of Nations following World War I?
June 7, 2011

History
Why did imperialism become popular again during the last quarter of the 19th century?
June 7, 2011

chemistry
the compound tin(II)fluoride,or stannous fluoride,once was a common ingredient in toothpaste.It is produced according to the following reactions: Sn(s)+2HF(g)->SnF2(s)+H2(g) if 45.0 grams og HF react with Sn,how many grams of stannous fluoride are produced?
May 26, 2011

Chemistry 12
how are we supposed to add them together when there is no I in the first equation?
May 24, 2011

Chemistry 12
wow thank you very much, that site is very helpful and you've been very helpful! Thank you!
May 24, 2011

Chemistry 12
i don't understand how i'm supposed to use the reduction potentials table to blance it
May 24, 2011

Chemistry 12
a) Use the standard reduction potentials table to balance the following redox equation: H2O2 + I + H = H2O + I2 b) Balance the following redox equation by the oxidation number method: Ag + HNO3 = AgNO3 + NO + H2O
May 24, 2011

Chemistry
A-A^+ D^2+ + C = No Reactions B^2+ + C = B C^2 A^+ + B = A + B^2+
May 24, 2011

Chemistry
This question is really making me upset i just can't get the answer right. i've tried so many times. If someone could help it would be muchly appeciated! Experiments were performed with four metals and solutions of their ions: A-A, B-B2+, C-C2+, D-D2+. the results of ...
May 24, 2011

chem12
that is helpful, i just don't get how to get the graph right, mine went up, how do i get the numbers and plot the graph correct?
May 24, 2011

Intro to Psychology
Thanks I reread that part and it's d! I always over think my answers
May 24, 2011

Intro to Psychology
I'm thinking personality test
May 24, 2011

Intro to Psychology
Although not considered high in reliability or validity, this type of psychological assessment, if used correctly and by well-trained professionals, can provide valuable insight into understanding a person's thoughts and feelins. a. intelligence test b. achievement test c...
May 24, 2011

chemistry
how many grams of h2o are produced when 50.0g znco3 reacts with c6h8o7
May 23, 2011

chemistry
i have another one i can't get the write answer for... Calculate the pH of the colution that results when 27.38 mL of 0.15 M H2SO4 is mixed with 18.50 mL of 0.19 M Ca(OH)2? Thank you guys so much!!
May 23, 2011

chemistry
Just keep getting different answers when i review this, i can't seem to get the correct one. Calculate [H3O] and [OH] for a sodium hydroide solution having a pH of 12.5
May 23, 2011

physics
A pen placed 13.0 cm from a concave spherical mirror produces a real image 13.5 cm from the mirror. a) What is the focal length of the mirror? Answer in units of cm. b) Calculate the magnification of the image. Assume the pen is placed 28.9 cm from the mirror. c) What is the ...
May 22, 2011

Physics
With an average acceleration of −2.2 m/s^2, how long will it take a cyclist to bring a bicycle with an initial speed of 14.5 m/s to a complete stop? Answer in units of s.
May 22, 2011

Chemistry
i have another one i can't get the write answer for... Calculate the pH of the colution that results when 27.38 mL of 0.15 M H2SO4 is mixed with 18.50 mL of 0.19 M Ca(OH)2? Thank you guys so much!!
May 22, 2011

Chemistry
Just keep getting different answers when i review this, i can't seem to get the correct one. Calculate [H3O] and [OH] for a sodium hydroide solution having a pH of 12.5
May 22, 2011

chemistry
Decrease in pressure
May 15, 2011

hum
Identify leaders of the Civil Rights and Black Power movements and their contributions to their respective causes.
May 14, 2011

Calculus
Thanks so much! :)
May 13, 2011

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