Questions Asked on
March 26, 2012

College Chemistry
Consider the reaction. 4Fe(s) + 3O2(g) ¨ 2Fe2O3(s) If 0.500 mol of Fe reacts with 0.400 mol of O2, what are the limiting reactant and the theoretical yield in moles of Fe2O3 for the reaction, respectively?
asked by Lisa 
math
Jeremy collected nickels for 1 week. He is making stacks of his nickels to determine how many he has. The thickness of 1 nickel is 1/16 inches. How tall is a stack of 16 nickels? What is the combined height of 3 nickels, 2 nickels, and 1 nickel? I NEED
asked by Gabby ( 5 grade) 
Physics
A 30.0 kg box is being pulled across a carpeted floor by a horizontal force of 230 N., against a friction force of 210 N. Calculate the acceleration of the box and find the x and y components of the acceleration of the box. Align the positive direction
asked by Anne 
algebra
$6300 is invested,part of it at 10% and part of it at 7%.For a certain year, the total yield is $534.00. How much was invested at each rate
asked by Anonymous 
chemistry
When the following redox equation is balanced with smallest whole number coefficients, the coefficient for the hydrogen sulfate (HSO4) ion will be ______ . Al + HSO4 + OH > Al2O3 + S2 + H2O (basic solution)
asked by Admir 
Chemistry
500.0 mL of 0.220 mol/L HCl(aq) was added to a high quality insulated calorimeter containing 500.0mL of 0.200 mol/L NaOH(aq).Both solutions had a density of 1g/mL & a specific heat of 4.184 J/g.K.The calorimeter had a heat capacity of 850 J/C.Temperature
asked by Meenaakshi 
algebra
A ball is thrown into the air with an upward velocity of 28 ft/s. Its height (h) in feet after t seconds is given by the function h = –16t² + 28t + 7. How long does it take the ball to reach its maximum height? What is the ball’s maximum height? How
asked by Jin 
College Chemistry
Consider the following reaction that occurs when natural gas is burned. CH4(g) + 2O2(g) ¨ CO2(g) + 2H2O(g) How many moles of water are produced when 6.2 mol of methane are burned? Assume that there is more than enough oxygen present.
asked by Lisa 
chemistry
51.59 g of water at 82.6 oC is added to a calorimeter that contains 48.01 g of water at 40.9 oC. If the final temperature of the system is 59.4 oC, what is the calorimeter constant (Ccalorimeter) ? Use 4.184 J/goC for the heat capacity of water.
asked by emily 
earth
3. Show how the length of day changes with latitude by plotting the following points. Use the table below as a graph and place an X in the box where you want to plot a data point. For example, if you find that a day is 10 hours long at 30° N latitude,
asked by courtney 
Statistics
I am having trouble with this problem. A participant in a cognitive psychology study is given 50 words to remember and later asked to recall as many as he can of them. This participant recalls 17. What is the (a)variable, (b)) possible values, and (c)
asked by Michael 
physics
The body in Fig. 1037 is pivoted at O. Three forces act on it in the directions shown: FA = 13 N at point A, 6.4 m from O; FB = 17 N at point B, 3.6 m from O; and FC = 15 N at point C, 2.2 m from O. Taking the clockwise direction to be negative, what is
asked by Timmy 
Physics Question (Tension)?
A solid object can be deformed in three fundamental ways. A roof is held up by support columns inside the building. The deformation of the column caused by the roof is A. Compression and Tension B. Shear C. Bulk
asked by M 
physics
Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.470 m to y = 1.47 m. The second stick lies along the x axis from x = 0.320 m to x = 1.32 m. The third stick is positioned so that one end is on
asked by Julia 
Physics
A child's pogo stick stores energy in a spring with a force constant of 2.5×104N/m. At position A, the spring compression is a maximum and the child is momentarily at rest. At position B, the spring is in its equilibrium position and the child is moving
asked by bobby 
physics
An artist designs a mobile of light horizontal rods connected by vertical strings and supporting various shaped weights (see figure below). Find the magnitudes w2, w3, and w4 if w1 = 4.92 units of weight. The numerical values given in the figure all have
asked by JOHN 
Chemistry
Empirical formula 12.67 aluminum, 19.73 nitrogen, 67.60 oxygen
asked by Jeff 
geometry
Which segment is a tangent segment to circle Q? (Points : 1) EP EA AP BP It's from K12 and it's a small quiz (homework)
asked by Brandan 
physics
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.7 x 10^6 T. What is the intensity S of the wave?
asked by Sarah 
Chemistry
how many phosphorus atoms are present in 25.0 g of P4O10 ?
asked by Taylor 
math
yank hardy pulls the cord on his power mower. in order for the engine to start, the pulley must turn at 180 revolutions per minute. the pulley has a radius of 0.2 ft. how many radians per second must the pulley turn? How fast must yank pull the cord to
asked by michaela c 
math
I am a number between 400 and 500. My ones digit is 3 more than my tens digit. The sum of my digits is 13. What number am I?
asked by Tristen 
chemistry
How many liters of water vapor can be produced if 8.9 liters of methane has (CH4) are combusted, if all measurements are taken at the same temperature and pressure? Please answer & explain
asked by Anonymous 
statistics
In a study of termite populations in Swaziland, the following data were gathered on the percentage of termites that were classified as "major workers" at seven randomly selected sites:37.6 20.0 28.8 29.9 51.9 13.6 34.5 29.0 a)Use the given data to produce
asked by tea 
statistics
7. A recent study investigated the effects of a "Buckle Up Your Toddlers" campaign to get parents to use the grocery cart seat belts. When gathering baseline data prior to the campaign, investigators observed 86 out of 640 parents buckling up their
asked by tea 
Chem
How many mL of .150 M sodium hydroxide is required to neutralize 25 mL of .125 M of phosphoric acid?
asked by Kate 
statistics
A random sample of the houses in a particular city is selected and the level of radon gas is measured for each house in the sample. The values collected are given below in parts per million (ppm). Experience has shown that radon gas level is approximately
asked by tea 
Physics help!
Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.
asked by Sarah 
Chemistry Help!!!
I seriously don't understand this...i cant even begin to think of what to do please help... How many moles of Ba(OH)2 does it take to neutralize 2.5 moles of HNO3?
asked by Mary 
child psychology
Parents of impulsive children can foster conscience development by building a a warm affectionate relationship the promotes A. secure attachment B.ego development I stongly believe its A please help
asked by sarah 
College Chemistry
Animals break down glucose (C6H12O6) as a source of energy according to the following overall reaction. C6H12O6(aq) + 6O2(g) ¨ 6CO2(g) + 6H2O(l) What mass in grams of CO2(g) is produced from the reaction of 15.0 g of glucose?
asked by Lisa 
math
one sixth of five dozen computers were shiped how many were not shiped b what was the ratio of computers were shipped to those that were not shipped c what percent of computers were shiped
asked by kristen 
Math. Explain
From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000? Consider the possibilities for 5digit, 4digit, 3digit, 2digit, and 1digit numbers and repetition of digits. 1,364 1,024 256 A telephone dial has holes numbered from 0 to
asked by Sebastian 
Statistics
A social psychologist asked 15 college students how many times they "fell in love" before they were 11 years old. The numbers of times were as follows: 2,0,6,0,3,1,0,4,9,0,5,6,1,0,2 make (a) a frequency table and (b) a histogram. Then describe the general
asked by Michael 
Stats
In the library on a university campus, there is a sign in the elevator that indicates a limit of 16 persons. Further more, there is a weight limit of 2500 pounds. Assume the average weight of students, faculty and staff on campus is 150 pounds, the
asked by Jane 
physics
A 69 kg skier encounters a dip in the snow's surface that has a circular cross section with a radius of curvature of 12 m. If the skier's speed at point A as shown below is 8.4 m/s, what is the normal force exerted by the snow on the skier at point B?
asked by andy 
p
A newly planted tree is supported against the wind by a rope tied to a stake in the ground, as shown in the figure below. The force of the wind, though distributed over the tree, is equivalent to a single force F, as shown in the figure. Find the tension
asked by JOHN 
types of business writing
Memorandum Revised: BROADWORTH GENERAL HOSPITAL Interoffice Memo TO: Miriam Hopkins, Director of Human Resources FROM: Shawna Parker, Administrative Assistant DATE: March 22, 2012 SUBJECT: Sexual Harassment and unlawful discrimination in the workplace
asked by Shawna 
College Chemistry
Consider the following reaction. 3Ca(s) + N2(g) ¨ Ca3N2(s) What is the theoretical yield in grams for the reaction if 10.50 g of calcium reacts with 5.50 g of N2?
asked by Lisa 
Geometry
1. An airplane is flying at 36,000 feet directly above Lincoln, Nebraska. A little later the plane is flying at 28,000 feet directly above Des Moines, Iowa, which is 160 miles from Lincoln. A.assuming a CONSTANT rate of descent, what was the angle of
asked by Leah 
physics
A certain string breaks when a force of 225 N is exerted on it. If two people pull on opposite ends of the string , each with a force of 175 N , will the string break? What actions reaction pairs of forces would be involved?
asked by Isabella 
accounting
Mendez Company currently produces and sells 20,000 units of product at a selling price of $10. The product has variable costs of $4 per unit and fixed costs of $50,000. The company currently earns a total contribution margin of?
asked by Anonymous 
statistics
One method for estimating the availability of office space in large cities is to conduct a random sample of offices, and calculate the proportion of offices currently being used. Suppose that real estate agents believe that of all offices are currently
asked by tea 
English
Is the word desperate an omitted syllable, omitted letter, or an added syllable?I think is is an omitted letter.
asked by Chandler 
statistics
the dean of admissions in a large university has determined that the scores of the freshman class in a mathematics test are normally distributed with a mean of 86 and a standard deviation of 11. A sample of 50 students is selected at random from the entire
asked by Pat 
Physics
A 14.6g marble is dropped from rest onto the floor 1.23 m below. If the marble bounces straight upward to a height of 0.665 m, what is the magnitude of the impulse delivered to the marble by the floor. If the marble had bounced to a height of 0.884 m,
asked by Brett 
statistics
According to internal testing done by the GetAGrip tire company, the mean lifetime of tires sold on new cars is 23,000 miles, with a standard deviation of 2500 miles. a) If the claim by GetAGrip is true, what is the mean of the sampling distribution of
asked by tea 
physics
What acceleration is produced by a force of 250N acting on a mass of 25KG?
asked by Rethabile 
physics
A 85.0 N weight is held in the hand. The upper arm makes an angle of 29.0° with the vertical, and the lower arm is 13.0° above the horizontal. Find the tension in the biceps tendon.
asked by JOHN 
chemistry
If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, what is the balanced equation for this
asked by Tori 
human development
a condition that's generally the result of social pressure is?
asked by Ashley 
College Chemistry
In a reaction vessel, the following reaction was carried out using 0.250 mol of NH3(l) and 0.100 mol of N2(g). 4NH3(l) + N2(g) ¡ú 3N2H4(l) Which of the following represents the composition in moles in the vessel when the reaction reaches completion?
asked by Lisa 
College Physics
A 1.75kg wooden block rests on a table over a large hole as in the figure below. A 4.60g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum
asked by Anonymous 
science
A merrygoround starts from rest and accelerates uniformly over 26.0 s to a final angular velocity of 5.50 rev/min.
asked by JOHN 
Geography Market Areas
The GIS assumes that you will root for the team nearest you. Thus, it draws market areas based solely on the distance to the nearest baseball team. In real life, however, other factors can affect or distort the market area so that the distance is not
asked by JJ 
math
a car's wheel turns at 200 rpm. the radius of each wheel is 1.3 ft. to the nearest radian per minute, what is the angular velocity of a point: on the tire thread? on the hubcap .4ft from the center? right at the center?
asked by michaela c 
Calculus
Vector C=5 and Vector D=8. The angle formed by C and D is 35 degrees, and the angle formed by A and C is 40 degrees. Determine B. Here is the image for triangle: imgur dot com/OZAwV please help, I have a test tomorrow~
asked by Melinda 
Physics
A loud speaker of mass 24.0 kg is suspended a distance of h = 2.00 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 3.50 m. What is the tension in each of the cables?
asked by Anne 
Chemistry
2NO(g) + H2(g) > N2O(g) + H2O(g) + energy. 1. Assume the reaction is reversible and at equilibrium. What shifts in the equilibrium of this reaction are suggested by Le Chateliers Principle?
asked by John 
chemistry
in order to dilute 40.0 ml of .600 m hcl to .100 m, the volume of water that would need to be added would be?
asked by Anonymous 
statistics
(Quiz 240 ) Stratified Sampling: The owner of a private food store is concerned about employee morale. She decides to survey the mangers and hourly employees to see if she can learn about work environment and job satisfaction. From the list of workers at
asked by mary 
chem
How much energy (in Joules) is required to heat 13.48 g of water from 10.5 oC to 46.2 oC ? Use 4.184 J/goC as the specific heat capacity of water.
asked by emily 
PHYSICS
Calculate the force required to remove a suction cup of area 2.60 cm2 from the surface to which it is stuck.
asked by JOHN 
maths
There ere 258 pupils in the hall.If 1/3 of the boys left the hall and 22 girls entered the hall, there would be an equal number of boys and girls in the hall. 1) How many boys were in the hall at first? 2)Ho many more boys than girls were in the hall at
asked by srihita 
Math
A certain bacterium divides into 2 bacteria every 20 minutes. If there are four bacteria in the culture now, how many will there be in 4 hours, assuming that no bacteria die?
asked by Garz 
Physics. PLEASE HELP!!
NOTE: 1 MJ = 106J. One of the most powerful cranes in the world, operating in Switzerland, can slowly raise a load of 6000 tonne to a height of 8 m. (1 tonne = 1000 kg) The acceleration of gravity is 9.81 m/s2 . How much work is done by the crane? Answer
asked by Ashley 
income tax
Clyde had worked for many years as a chief executive of Red Industries. Inc. and had also been a major shareholder. Clyde and the company had a falling out, and Clyde was terminated. Clyde and Red executed a document under which Clyde’s stock in Red
asked by Anonymous 
Types of Business writing
REVISED : Dear Mr. Dittmer: I am writing to you to request a trainer for our seminar on sexual harassment and unlawful discrimination in the workplace for twenty of our office supervisors. Our company would also like to take this opportunity to thank you
asked by Shawna 
Chemistry
How many mL of .150 M sodium hydroxide is required to neutralize 25 mL of .125 M of phosphoric acid?
asked by Kate 
College Chemistry
For the following reaction: A + 3B ¨ 4C Which of the following provides the direct link between the amount of reactant A and the amount of product C?
asked by Lisa 
physics
A 20 kg block slides with an initial speed of 11 m/s up a ramp inclined at an angle of 25o with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.8. Use energy conservation to find the distance along the incline that
asked by andy 
chemistry
A heliumﬁlled balloon has a volume of 2.83 L at 30 ◦ C. The volume of the balloon decreases to 2.35 L after it is placed outside on a cold day. What is the outside temperature in K? Answer in units of K?
asked by Kellie 
maths
sally read 21 pages of a book on Satuday. She read 5/9 of the remainder on Sunday. If she still had 1/3 of the book left to read, how many pages were there in the book?
asked by srihita 
Math
A motorist took a total of 4hr to drive from town A to town C. He took 1hr to travel from town A to town B,which is between town A & town C. The distance between town B & town C is 11/15 of the distance between town A and town C. If the total distance
asked by Da S 
math
HOW TO UNSCRAMBLE THE LETTERS MASRRLAEAEHCDDI
asked by Anonymous 
physics
A man doing a slow pushup is approximately in static equilibrium. His body is horizontal, with his weight of 755 N supported by his hands and feet, which are 1.34 m apart. One hand rests on a spring scale, which reads 270 N. If each hand bears an equal
asked by JOHN 
science
What conditions are present in stars that cause hydrogen to form helium? What is this process called?
asked by long 
science
Compare and contrast an asteroid and a comet.
asked by SoccerStar 
physics
Using newtons third law of motion, and action reaction pairs explain the following situations A person with ordinary shoes is able to walk on a sidewalk A rocket accelerates in the vacuum of outer space Thanks for the help, any would be great!
asked by Isabella 
English
1. The bakery is inbetween the school and the bookstore. 2. The bakery is between the school and the bookstore. (Are both the same and grammatical?) 3. The post office is across from the convenience store. 4. The post office is opposite the convenience
asked by rfvv 
English
Which of the following is an example of primary research? A.Searching the Internet for nutritious recipes B. Asking a reference librarian for specific information C. Calling a dietician for information about a lowcarb diet D. Reading an interview in a
asked by Brenna 
Chemistry Help Please!!
We did an experiment and I don't really know how to calculate this question. If you could show me how to do one, then I could do the rest. INFORMATION: HCl = 0.1404 M We placed 0.5 g Ca(OH)2 in 100 mL of the following solutions: Flask A: Distilled Water
asked by Ally 
physics
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.90 1010 T. The wave passes perpendicularly through an open window, the area of which is 0.20 m2. How much energy does this wave carry through
asked by sarah 
Math
Perform the indicated operation and simplify? (4x)/(x2)+(8)/(x+2)
asked by pop 
Math
Mr Roberts drove a distance of 118km from city X to city Y. At first,he drove at a speed of 60 km/h. Then he drove for 1 1/4hr to city Y,covering a distance of 70km. If Mr Roberts left city X at 1400, at what time did he arrive at city Y?
asked by Da S 
Leadership
As F. Nicholas Jacobs toured the Windber Medical Center facility, he was dismayed by the industrial pink painted walls, the circa 1970 furniture, and the snow leaking through the windows of the conference room. Employees earned 30 percent less than their
asked by Anonymous 
Chemistry
what is the magnitude of delta for [Ti(H2O)6]3+ in kj/mol?
asked by Steven 
physics
a cherry boob explodes into three pieces of equal mass.one of the piece has an initial velocity of 10 m/sx.another piece has an initial velocity of 6.0 m/s x3.0 m/s y.what is the velocityof the third piece
asked by Anonymous 
Physics
Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 1.96 cm from the rotation axis.
asked by Alex 
Physics. PLEASE HELP!!
A skier of mass 71 kg is pulled up a slope by a motordriven cable. The acceleration of gravity is 9.8 m/s2. How much work is required to pull him 64.6 m up a 33.8 slope (assumed to be frictionless) at a constant speed of 2.53 m/s? Answer in units of kJ
asked by Ashley 
Chemistry HELPP!!!!!!
We did an experiment and I don't really know how to calculate this question. If you could show me how to do one, then I could do the rest. INFORMATION: HCl = 0.1404 M We placed 0.5 g Ca(OH)2 in 100 mL of the following solutions: Flask A: Distilled Water
asked by Myles 
math
if triangles abc and xyz are congruent. angle a is one half the size of angle b. angle y is 90 degrees. angle c and angle z are both 45 degrees. what is the measure of angle a?
asked by steve 
physics
An object is in front of a converging lens (f = 0.36 m). The magnification of the lens is m = 4.8. (a) Relative to the lens, in what direction should the object be moved so that the magnification changes to m = –4.8?
asked by Anonymous 
Science
How does the process of upwelling affect the distribution of life in the ocean? A.It keeps the salinity of the ocean constant. B.It replaces polluted water near shore with clean water. C.It replaces nutrientdepleted waters with nutrientrich waters. D.It
asked by Astrid 
Physics
Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 1.96 cm from the rotation axis.
asked by Alex 
algebra
$6300 is invested,part of it at 10% and part of it at 7%.For a certain year, the total yield is $534.00. How much was invested at each rate
asked by Anonymous 
statistics
1. The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa. (a) What is the probability that a randomly chosen sample of glass will break at less than 579 MPa? (b)
asked by Anonymous 
statistics
An agricultural economist is interested in determining the average diameter of peaches produced by a particular tree. A random sample of 50 peaches is taken and the sample mean calculated. Suppose that the average diameter of peaches on this tree is known
asked by Pat 
Chemistry
a) Write the chemical formula for the simplest pentyne isomer, b) give the name of the two isomers that have pentyne as the base chain, c) give the name of the one isomer that has butyne as the base chain, d) give the name of the 5 chain cyclic isomer, e)
asked by Hannah 
Algebra
A rectangular pen for a pet is 5 feet longer than it is wide. Give possible width of the pen if its area must be 204 and 750 square feet, inclusively.
asked by Jennifer 
maths
Siew Yan had some red coloured beads and yellow coloured bead. The number of red coloured beads was 4/9 as many as the number of yellow coloured beads. After giving away 21 yellow beads, Siew Yan 2/3 as many red coloured beads as yellow coloured beads. How
asked by srihita 
Maths
A spaceship has a speed of 500000 meters per second. Calculate, in scientific notation, the speed in km per hour.
asked by Cyco 
Chemistry
energy required to raise the temp of H2O from 15C to 125c
asked by Luke 
Chemistry
4 a) Write the chemical formula for the simplest pentene isomer, b) give the name of the two isomers that have pentene as the base chain, c) give the name of the three isomers that have butene as the base chain, d) give the name of the 5 chain cyclic
asked by Hannah 
english
In "Good night Wille Lee, I'll See You in the Morning" I am looking for abstract nouns I know that forgiveness and promise is one but I need one more.
asked by Poem 
english paragraph 8  12 sentences long
Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two department stores. You know she plans to apply at similar stores in your town. But you also know she is a perfect
asked by kay 
Science; magnets
I know that magnets are attracted to iron. I don't know the proccess of how magnets stick to something. I also need to know more sciency magnet words like magnetism and ferrous.like that. what is magnetism. stuff like that. i need help because I might fail
asked by Celest 
Chemistry Help Please
What is the OH concentration of a solution that has a pH of 9.66?
asked by Mary 
chemistry
In hard water analysis, the end point is reached when 13.5 mL of 0.0913 M standardized EDTA has been added. Determine the water hardness in equivalence of CaCO3. That is, determine the mg CaCO3 per liter
asked by Brynn 
Calculus and vectors
Please help/verify the answer. 1. When you add vectors geometrically: a) vectors are aligned tail to tail b) vectors are aligned head to head c) vectors are aligned head to tail d) vectors are put side by side Is the answer D?
asked by Melinda 
thermodynamics
A pistoncylinder device contains 100 g of ethylene gas initially at 27oC, 115 kPa. Ethylene is heated and the piston starts to rise until the volume reaches 90 L and merely touches a linear spring that has a spring constant of 60 kN/m. More heat is added
asked by sara 
trig
How do I prove : 4sinAcosAcos2Asin15 all over. :sin2A(tan2252sinsquared A)is equal to. :root 6  root 2 over 2
asked by michelle 
physics please help!!
Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.
asked by linds 
PhysicsThermo
Imagine a 600 g of water at 70oC in a pistoncylinder device. Initially, the 9kg, 13cm diameter piston rests on two stops such that the water occupies a volume of 0.2 m3. Heat is transferred to the system until the water is completely vaporized. Take the
asked by sara 
algebratrig help asap
An isosceles triangle has a base 22 cm long and a base angle of 72 degrees. Find its perimeter.
asked by missy 
Types of buisness writing
Email Revised TO: Deb.Walker@ CC: Jeremy.Dittmer; m_hopkins@ SUBJECT: Sexual harassment and unlawful discrimination in the workplace seminar Dear Deb: I would like to confirm our arrangements as we previously discussed on our seminar about sexual
asked by Shawna 
trig
Prove: sin(x–y)sin(x+y)=sin^2(x)–sin^2(y)
asked by Carl 
chemistry
In the presence of a tungsten catalyst at high temperature, the decomposition of ammonia to nitrogen and hydrogen is a zero order process. If the rate constant at a particular temperature us 3.7x10^6 mol. How long will it take for an ammonia concentration
asked by court 
Math
Mark wanted to measure the height of a nearby building. He placed a mirror on the pavement at point P, 80 feet from the base of the building. He then backed away until he saw an image on the top of the building in the mirror. If Mark is 6 feet tall, and he
asked by Hannah 
Chemistry Help!!!!
for each of the following pairs of elements, give the correct molecular formula, explain how you arrived at this answer( you may use the Bohr model notation, or the orbital model notation, or explain linguistically) and note whether the bonding is covalent
asked by John 
Accounting
What is the difference between cash basis and accrual basis accounting? Why do accrualbasis financial statements provide more useful information than cashbasis financial statements? Describe when each method (cash basis and accrual basis accounting)
asked by Mar 
English
Writecher, I need your help to revise this. Thank you. 1) I really hope that you read my presentation of your school and that you liked it. As a matter of fact, I've just emailed it to our history teacher, who is going to set up a link to your school
asked by Matthew 
Statistics Psychology
I'm confused about how to prove this question: ht tp://imageshack.us/ photo/myimages/708/ question1c. jpg/ Get rid of all the spaces
asked by Arianna 
College Chemistry
Consider the following symbolic reaction in which the hypothetical elements hearts (¢¾) and diamonds (♦) react to produce the compound spades (¢¼). ¢¾ ¢¾ ¢¾ ¢¾ + ♦ ¡æ ¢¼ ¢¼ . Which of the following represents the number of spades
asked by Lisa 
Language
a) the singing of one's name _ _ _ _ ture b) the time to leave _ _ _ _ _ ture c) silly, not acting of one's age _ _ _ _ture I swear I found all of them except these three
asked by SMARTY PANTS 
Math
the volume of a rectangular prism is 256 cubic centimeters. What is the volume of a similar rectangular prism that has edge lengths one fourth as long as the edge lengths of the original prism?
asked by Joe 
science
At 472 deg C the reaction reaches equilibrium with the following composition: [H2]=7.38atm, [N2]=2.46atm, [NH3]=0.166atm. Into the equilibrium mixture 1.5 atm of N2 is introduced: a. Calculating Kp and Q, determine in which direction the reaction will
asked by kim 
medical terminology
A patient was brought to the hospital emergency room with a stab wound to the patellar area. A needle was inserted to remove synovial fluid from the joint. What type of procedure was done?
asked by kah 
Geometry
Which of the following can be used to describe the triangle with the vertices listed below? F(1, 2), G(10, 2), H(12, 11) I. acute II. obtuse III. right IV. scalene V. isosceles VI. equilateral Please help!!! Explain.
asked by monique 
child psychology
Mishel's research shows that  is especially important in teaching children to delay gratification and resit temptation. A. the desiretheory of mind B.diverting attention C.perspective taking D.reinforcing I think its C, am I correct please help
asked by sarah 
maths
solve for x for angles between o and 360 degrees (i)cos2x+sinx=0
asked by muzi 
Physics
I am having alot of difficulty with this problem,any help would be greatly appreciated. A baseball of mass 145 g leaves a pitcher’s hand at 96.6 mi/h (1 mi/h = 1.609km/h), but due to air resistance, it arrives at home plate 60.0 ft away (1 ft = 0.3048 m)
asked by bobby 
Physics
How high does the 35g ball go if the ball leaves the spring at the point shown in image? K=953 N/m and Xa=0 and Xb=0.120m (b)? What is the velocity of the ball when it leaves the spring?
asked by bobby 
science
Some theoriests say that in the inflationary period, the scale of the universe increased by a factore of 1050. Suppose your height were to increase by a factore of 1050. How tall would you be? Express your answer in lightyears and compare it to the size
asked by long 
Math
Mrs Leong took 1 hour to drive 1/5 of a journey from village R to village S.she drove the remaining 180km in 4hr. A) what was Mrs Leong's speed for the first part of the journey? B) how long did she take to travel the whole journey? C) find Mrs Leong's
asked by Da S 
ms.sue 3 grade english
Posted by dw on Thursday, March 22, 2012 at 6:24pm. GENERALIZE WHEN YOU READ YOU CAN SOMETIMES MAKE A GENERAL STATEMENT ABOUT WHAT YOU HAVE READ. A GENERAL STATEMENT TELLS HOW SOME THINGS ARE MOSTLY ALIKE OR ALL ALIKE. LOOK FOR EXPAMPLES. ASK WHAT THEY
asked by dw 
child psychology
A parent who uses imperitives and specifit suggestions in everyday life is most likely the parent of A.son B.daughter C.teenager D.son and a daughter I think its C but not sure because teenagers don't have time to listen
asked by sarah 
UNIVERSITY OF PHONEX
HELP ME WITH MATT 117 WEEK 4 QUIZ
asked by KIM 
calculus
Find the volume V of the solid in the rst octant bounded by y = 0, z = 0, y = 3, z = x, and z + x = 4. The best part about this problem is that I solved it using basic geometry but am expected to do it using a triple integral that will take up a whole
asked by Bryant 
math
inventory puposes, a manufacturing company assigns a 3 charcter code to each differnt item produced. the first character of the code must be aleter from the 26 letter english alphabet. the second and third characters must each be a digit from 09. how many
asked by sb 
computers
I need some help with creating a simple, but automatic site status (uptime/downtime) monitor script in ColdFusion. Basically I would like the script to check if an application on my site is accessible or not every 60 minutes. If the application is down at
asked by Mike 
Geometry
Explain why the inverse of sine times 1.5 does not make sense.
asked by Anonymous 
Spanish9th gradePlease help me
Is this I would say I snacked(past tense) on popcorn and a drink in the movie? Merende palomitas de maíz y un refresco en el cine. How do I say I snack(present tense) on popcorn and a drink in the show? Meriendo palomitas de maíz y un refresco en el
asked by Joelle 
student
an average length of 2 inches and a standard deviation of .005 inches. What is the 95% confidence interval for the length of these screws?
asked by mark 
math
a rectangular security area is enclosed with 200 ft of fencing. if this rectangular area is arranged so that the ratio of the length to the width is 5/3, find the dimensions.
asked by alan 
Algebra 2
If f(x)= x^2 + 3 and g(x) = 3x  1 then find the following: 1a. (f+g)(x) 1b. (f+g)(3) 1c. (fg)(x) 1d. (fg)(x) 1e. (fg)(1) 1f. (f/g)(x) 1g. (f o g)(x) 1h. (f o g)(1) 1i. (g o f)(x)
asked by Elizabeth 
Chemistry help please
What is the pH of a solution whose hydronium ion concentration is 0.0010 M?
asked by Mary 
College Chemistry
The maximum amount of product D that can be produced from the following reaction is 55.75 g. 2A + B ¨ 2C + 3D Following an experiment based on this reaction, when the D was isolated, 50.67 g of D were obtained. What is the percent yield for this
asked by Lisa 
Language
Can u guys plz answer to my questions????PLZZZZ
asked by SMARTY PANTS 
Calculus and vectors
Do the vectors (2,0,1),(2,0,0) and (2,3,0) lie on the same plane? Explain your reasoning.
asked by Melinda 
Shurley english
How do you classify the sentence Today Dad ate two eggs and bacon for breakfast.
asked by Sharon 
4th grade math *sigh
in which situation below would you need to find the area? 1) finding the distance around a pool 2) buying a wallpaper border for your bedroom 3) carpeting the living room 4) fencing a yard
asked by Celest 
History
What event in the U.S. History took place at Appomattox Court House in Virginia?
asked by Derrick 
College Math
A spherical balloon has a radius of 9 centimeters. Find the amount of air required to fill the balloon. Round to the nearest hundredth
asked by Rochelle Finister 
English
i think of doing mental illness story on stress. i think of doing this in thirdperson. my friend sort of add and give me more ideas for this story i be doing. please tell me if it be good and give any other ideas. and this thirdperson be close person to
asked by Mohammad 
chemistry
Consider the reaction at equilibrium: CaO(s) + CO2(g) ! CaCO3(s) If you add more CaO to the system, how will the system respond?
asked by please help 
US History
Got a question: On our class we have to write a research paper tracing the historical causation of a current event and the current event has to be with in a year! Can someone help me with suggestions?
asked by Brooke 
Math
an empty sandbox has a length of 6 ft, a width of 4 feet, and a depth of 2 feet.of the sandbox is filled with 8 bags of sand and each contain 4.5 cubic feet of sand, what fraction of the sandbox is still empty
asked by Estefani 
Biology
Suppose that black hamsters were found to be 70% of the population and the gray hamsters 30% of the population. Calculate the percentage of BB, Bb, and bb hamsters in the next generation.  I don't know how to calculate the percentage of the genotypes.
asked by Aria 
Chemistry
85.65 grams of barium hydroxide were dissolved in 2000ml of water. 88 grams of carbon dioxide were passed through the solution producing a white precipitate. what was this white precipitate and how many grams of it were produced.
asked by John 
math
x times 8.625 = 755.65. What is x
asked by Rich 
English
1. Look at the girl's appearance. How does she look? She looks happy. 2. Look at the girl's looks. What does she look like? She looks angry. 3. Look at the girl on the first picture. How does she feel? She feels angry. 4. Look at this picture. Will you
asked by rfvv 
Chemistry Help Please!!!
For each of the reactions below give a balanced equation. 1)Methane (CH4) with chlorine to give chloroform (CHCL3)and hydrogen cloride. 2) Sodium Hydroxide with phosphoric acid. 3)sodium carbonate with sulfuric acid. 4) sodium sulfide with hydrochloric
asked by Kimberly 
Physics
how to find how many ridges a 10 p coin has? What do we measure and how do we work it out?
asked by Anonymous 
Calculus
The Regional Farm Bureau (RFB) is preparing a brochure that offers advice about constructing pens for small farm animals, and they want us to be their consultants. They need us to carefully analyze the following situations and provide a detailed report.
asked by Michael 
math
HELP ANYONE PROBLEM: Mrs. O'Dell made this diagram of her backyard.( 7squares across and 5squares down) If each square represents1 squareyard, what is the area of her yard?
asked by ebony 
chemistry
Student A ran all her standards through the AAS at a specified C2H2/air flow rate. Just before she was to run her Cu sample, Student B turned down the flow rae of C2H2, thus lowering the flame temperature. Would students' A results of Cu in their sample be
asked by Jane 
statistics
I need an example of constructing a frequency polygon and have never used excel. I know what I'm supposed to put on the graph, I just don't know how to construct one on a computer.
asked by Jody 
geometry
what is the area of a isosceles trapezoid with legs of 15 feet and bases of 10 feet and 28 feet?
asked by Alyssa 
chemistry
calculate the mass of kool aid required to prepare 200.0 ml of 0.30 M kool aid
asked by ana 
English
Hi,I am giving in this work and so is my sister Zakiyya.Please check both of ours.  Q)You are the editor of a local weekly newspaper. A national charity is planning to open a residential home for troubled teenagers in your area.Some
asked by Parveen 
American Literature
Explain the shift from the 1950s ideal of the great American novel to the Death of the Novel debates of the 1960s. would appreciate a few pointers on this, thanks
asked by random 
Biology
The main function of the stomach is to soften the food so that the food can pass through the body quickly. Is this True or False?
asked by Elina 
physics
what is the formula to find..If the driving frequency is reduced slightly (but the driving amplitude remains the same), at what frequency will the amplitude of the mass's oscillation be half of the maximum amplitude?
asked by Anonymous 
Math
Fauzia took 30min to cycle from her house to the cinema. If she cycled the first 3km of the journey at a speed of 150m/min, find her average speed for the remaining 3km of the journey
asked by Da S 
Math!!!!!
Fanny invests $12000 at 6% p.a. For 2 years. Find the amount she will obtain after 2 years if the interest is compounded monthly
asked by Nicole 
Life Or
3.1,1What according to the basic condition of employment Act applies with regard to the contravention that you ve identified?
asked by ZEE 
trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x  1
asked by Help!!!HElp!!!Help!!! 
Math
What is 1/6 in decimals?
asked by Candy Corn 
U.S History
what did the members of the temperance movement hope to do?
asked by Jackson 
Chemistry  buffers
Two burettes are filled with solutions: one with 0,1OM CH3COOH solution, second with 0,15M CH3COONa. How many milliliters each solution will need to make 20mL of solution, which pH=4.85
asked by Anonymous 
ap world history
what was the world bank? why was it created?
asked by cody 
media
what is the difference between "homogenization" and "nationalization" of the news?
asked by tina 
math
15,000 down payment, 20year mortgage loan with annual 6% interest compounded monthly. The payment is $809. Trying to figure the final selling price. I can do all the steps except for calculating P.
asked by john 
math
Determine the water level inside a tank that has a diameter of 40 feet and contains 180,000 gallons of water?
asked by J 
Math
Manny loves to eat Cajun pizza. Each square inch of pizza is 8 calories. He orders a slice of pizza from a pizza with a diameter of 16 inches that is cut with a central angle of 20 degrees. How many calories does he eat?
asked by Kat 
Economics
What does this sentence mean? "Economies of scale are experienced when average costs per unit of production fall as the size of output grows"
asked by CrissyXD 
physics
A 1kg mass (the blue mass) is connected to a 9kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1kg mass, and the rod and masses are free to rotate about this pivot
asked by Anonymous 
Calculus
Point A=(1,3,4) and point B=(2,2,0). Determine AB. a) (3,1,4) b) (3,1,4) c) (1,5,4) d) (1,5,4) I chose answer C. 2. A goes from (2,1) to (4,1) Determine the components of A. a) (6,0) b) (2,2) c) (2,2) d) (0,6)
asked by Jake 
Math
Perform the indicated operation and simplify? (4x)/(x2)+(8)/(x+2)
asked by pop 
Science (PLEASE HELP)
The oceans are so large that many people believe the oceans can absorb vast amounts of pollution without harm. Analyze the error in this concept, and explain how ocean pollution can affect human food supplies?
asked by Anna 
Chemistry
What mass of solid calcium hydroxide is required to neutralize .100 L of .500 < sulfuric acid?
asked by Kate 
child psychology
what is the only emotion that males express freely than females in every day interaction A.anger B.Sorrow C.Embarrassment D.Envy I think it is A but not sure because at time girls are the more aggresive ones. please help
asked by sarah 
geometry
Find volume of a cone where the base is a square using 8inches,10inches,and 4inches
asked by Shannon 
=
Generally, _________ cars get the best gas mileage. A. compact B. subcompact C. intermediate or midsize D. convertibles
asked by diamond 
math 7th
the car travled 350 miles on 15 gaallons of gasoline the car averaged how many miles per gallon? round answer to the nearest tenth
asked by kristen 
History
This religion was a driving force in both the abolitionist and women's rights movements. HELP PLEASE!?
asked by Anonymous 
Consumers
A trapezoid has an altitude of 12 cm. Its parallel sides measure 10 and 8 cm, respectively. What is it's area?
asked by Kylee 
ALGREBA
oFFICE JET PRINTERCOPY SUES DISSERTATION IN 22 MIN LASER PRINTER CAN COPY THE SAME IN 20 MIN HOW LONG WOULD IT TAKE TO TO COPY THE DISSERATION.
asked by KIM 
maths
Kai Ling, Sam and Marie shared a bag of candies. Kai Ling received 2/5 of the candies, Sam received 2/3 as many candies as Kai Ling. Marie received 65 candies. How many more candies did Kai Ling receive than Sam?
asked by srihita 
Calculus
Vector D represents: URL is here imgur dot com/AX4EN a) A+B b) AB c) C+B d) A+C I chose answer A. Is that the correct answer?
asked by Jake 
Psychology Statistics
Not sure how to rewrite this question: ht tp://img221. imageshack.us/ img221/601/question2. jpg Get rid of all the spaces to see image of question.
asked by Arianna 
maths
D,E,F are the midpoints of a triangle ABC then what is the area of triangle DEF?
asked by help me out it's urgent 
English  ms. sue
ms. sue i think of idea for mental illness story down below u please see if it make sense?
asked by Mohammad 
English
I urgently need you to check these sentences. Thank you very much, Writeacher. 1) I'll take an umbrella in case (that) it rains(it may rain/it might rain) You can go to the cinema providing you finish your homework. 2) He should have repaired his car. She
asked by Matthew 
Math
Putting together the things that go together. corns, onions, beets, broccoli, lettuce, potatoes, carrots, string beans. Write why they go together..
asked by Veil 
math
If the area of the grass, before removing the innermost track lanes, is approximately 9615 square meters, how many square kilometers of grass are there?
asked by nika 
Physics
Find the velocity of a car of mass 1300kg and has kinetic energy of 3800 J.
asked by Selena Uter 
math
solve for x. 8^6+3x=16
asked by danielle 
math
what is 75 percent of 64
asked by kristen 
English
It is a long walk to school. (What does 'It' refer to? What does 'to school' modify in the sentence? Is 'to school' an adverbial phrase?)
asked by rfvv 
algerbra
2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have
asked by Anonymous 
PreCal
A telephone dial has holes numbered from 0 to 9 inclusive, and eight of these holes are also lettered. How many different telephone numbers are possible with this dial, if each "number" consists of two letters followed by five numbers, where the first
asked by Sebastian 
social studies
impacts of the fur trade on first nations?
asked by janette 
Physics
Hydro Quebec charges clients by the kilowatt hour. Is this a unit of power, energy or force? If you consume 500kWh per month how would this be expressed in SI units?
asked by bobby 
History
The first transcontinental road in the United States ran from New York City to where?
asked by Derrick 
American Literature
How did the social and political climate of the 1950s differ from that of the 1960s? a few pointers on this as well, thanks
asked by random 
math
If ab=3,ab=7,then(a+b)is _______
asked by help me out it's urgent 
world history
What were some of the ways that people in power restricted poor people from voting in the United States in the 19th century? You should be able to describe at least two.
asked by Anonymous 
physicsplease help
A halfopen pipe is constructed to produce a fundamental frequency of 230 Hz when the air temperature is 17 °C. It is used in an overheated building when the temperature is 39 °C. Neglecting thermal expansion in the pipe, what frequency will be heard?
asked by sara 
language arts
how do you diagram this sentence.. Monica,my best friend laughed with delight at my funny joke.
asked by carlye 
LA
who is John Newberry and what signifigance did he have to the award, (I just need help finding a site with the answer on it, not the actual answer because that would be cheating)
asked by Katniss 
math
MRS.O'DELL MADE THIS DIAGRAM OF HER BACKYARD. ( 7 squares across and 5 down) if each square represents 1 square yard, what is the area of her backyard?
asked by EBONY 
physics
How might you determine the age of a star from an Earthbased telescope? What measurements might you make?
asked by long 
child psychology
Typically when paired with a boy in a laboratory play session, a two year old girl is likely to A. stand idly while the boy explores the toy B.assume domineering behavior, telling him what to do C.actively explore the surroundings D.play cooperatively with
asked by sarah 
spanish/check please
Mis hermanos y yo los ( oimons/ oyeron) ______ hablar unos minutos en la cocina. answer :oyeron
asked by joseph 
math
hi if the second term of a sequence is root(2) and the seventh term is 8 what is the nth term equation(Geometric sequence) thanks
asked by joe 
Chemistry help please
What is the pH of a solution whose hydronium ion concentration is 0.0010 M?
asked by Mary 
trig
prove: cot^2(x)=cos(x)/(sinx)(tanx)
asked by Help 
US HISTORY
THE GIBSON GIRL OF THE 1890 PERSONIFIED
asked by Anonymous 
math
is 6.31 equal to 0.631
asked by barry 
English
I still have a few doubts on a few sentences. Thank you very much, Writeacher. 1) I need to write an example containing the verb "awake/awoke/awoken". Could you please help me? 2) Do you remember when/why/the reason for which/ the place in which/ how/ the
asked by Matthew 
history
What caused Jeffersonian Democracy to develop?
asked by Lala 
language arts
Hi. Do you know of any poems about holidays that include word play or puns? Thanks!
asked by Elizabeth 
math
whats is the equation to get these numbers 65,51,41,59,52
asked by haroun 
Organic Chemistry
I'm looking for a site with all the pentene isomers, and all the pentyne isomers. Anyone got any suggestions?
asked by Hannah 
maths
1/3 of Ali's stamps is equal to 2/3 of betty's stamps.If Ali has 85 stamps more than betty.How many stamps does Ali have?
asked by srihita 
liberal arts
mary and tom jointly buy the vanillachocolate cake for $20. Suppose that Mary values vanilla cake four times more than she values chocolate cake. Find the dollar value to Mary of each of the following pieces of the cake: a. the vanilla half of the cake b.
asked by kiara 
Algerba 2
how to graph 1/3
asked by John 
to ms.sue or soccerstar or someone
can you help me study with magnets and elactricty because I'm usually not in class when we have science experiments to see how it actually works.
asked by Celest 
trig
prove: (tan x + sec x)^2 = 2sec^2 x + 2tan x sec x  1
asked by Help!!!HElp!!!Help!!! 
math problem
please help x^2+14x4=0
asked by Lavern 
science
Most stars we see are on the main sequence. Stars spend most of their lives consuming their initial stock of hydrogen. Is there a connection between these two statements? If so, what is it?
asked by long 
Math Problem
Please help me v=48t^2
asked by Lavern 
math
How do I find the Area of the base of a tank if it is 8m high,base 4m long and 3m wide
asked by dejon 
math
how many edges does a cilinder have?
asked by Kemily 
algebra
8t/2=53
asked by Sara 
science
what are the hazards that can be caused during this health and safety experiment
asked by aleesha 
Math problem
subtract simplify if possible i am confused (4z)/(z6)(6z5)/(6z)
asked by Lavern 
Mathematics
Patrick invests a sum of money for 2.5 years at 12% p.a. compounded monthly. If he earns $11305 after 2.5 years, how much is his investment?
asked by Renee 
math
input:1 output:49 input:2 output:48 input:3 output:47 what is the rule? p.s.please answer this question. i need the answer right now.
asked by Karinna 
Chemistry  buffers
Laborant got a task to make a buffer, which pH = 8.00. Which same concentration solutions and which ratio would you suggest him to mix?
asked by Anonymous 
math
1/2 x 2/3
asked by Alex 
Math!!!!
Jessica deposits $6509 in bank at r% p.a. compounded halfyearly. If she obtains an amount of $6764 after 1 year, find the value of r.
asked by Nicole 
to drbob222
thank you so very much
asked by Celest