Questions Asked on
October 14, 2012

Physics
A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.81 m from the end of the track after falling a vertical distance h2 = 1.03 m from the end of
asked by Angela 
Chemistry
5 orange gas particles 6 blue gas particles 3 green molecules of gas (two particles attached together) If the partial pressure of the diatomic gas is 0.390 atm, what is the total pressure?
asked by Anonymous 
College Chemistry
Assuming that Ka is 1.85 *105 for acetic acid, calculate the pH at onehalf the equivalence point and at the equivalence point for titration of 50mL of 0.100M acetic acid with 0.100M NaOH.
asked by Kenetria 
Chemistry
Which of the following transition metal ions has a color? Cr3+ , hg2+, v2+ How can you predict that? I don't understand!!
asked by Catherine 
Chemistry
What is the concentration of a solution made by diluting 95 mL of 6.0 M HCl to a final volume of 750 mL
asked by Tish 
Precalculus
An 18 m tall tree is broken during a severe storm. The distance from the base of the trunk to the point where the tip touches the ground is 12 m. At what height did the tree break?
asked by Hanu2012 
chemistry
Values of the rate constant for the decomposition of N2O5 at four different temperatures are as follows: T(K) k(s^1) 658....2.14*10^5 673....3.23*10^5 688....4.81*10^5 703....7.03*10^5 The activation energy is 1.02*10^2 kJ/mol. Calculate the value of the
asked by Brunette 
Chemistry
A solution is 0.10M Pb(NO3)2 and 0.10M AgNO3. If solid NaCl is added to the solution what is [Ag+] when PbCl2 begins to precipitate? (Ksp PbCl2 = 1.7 x 10^5; AgCl = 1.8 x 10^10) The answers is 1.4 x 10^8 How do I find the answer
asked by Fred 
Chemistry
ZnZnCl2(0.00165 M)CuSO4(0.0125 M)Cu Find Ecell taking activities into account.
asked by amanda1012 
Physics
Two blocks rest on slopes of unequal angles, connected by a rope passing over a pulley. If the blocks equal masses, will they remain at rest? Why? Neglect friction.
asked by Anthony 
Statistics
John drives to work each morning and the trip takes an average of μ = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of σ = 5 minutes. For a randomly selected morning, what is the probability that John’s
asked by Robbie 
Physics
A 57 kg boy and a 45 kg girl use an elastic rope while engaged in a tugofwar on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.5 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in
asked by Jessica 
physics
In the figure below, a constant force of magnitude 82.0 N is applied to a 2.55 kg shoe box at angle = 64.5°, causing the box to move up a frictionless ramp at constant speed. How much work is done on the box by a when the box has moved through vertical
asked by Anonymous 
statistics
A researcher wishes to estimate with 95% confidence the proportion of adults who have high speed internet access. Her estimate must be accurate within 4% of the true proportion. 1. Find the minimum sample size needed using a prior study that found that 48%
asked by Diana 
math
The value of a new car decreases exponentially.Suppose your mother buys a new car for 22,000. The value of the car decreases by 20% each year. a.what is the initial price of the car. The decay factor. b. write an equation to model the value of the cars
asked by john 
Chemistry
When a wooden log burns it is essentially undergoing a combustion reaction. Explain why the ashes that form when a log burns have a lower mass than the log had before it started burning.
asked by Jazmine 
precal
A pile driver pounds a steel column into the ground. On the first drive, the column is pounded 1.65 metres into the ground, and on each successive drive it moves 80% as far as it did on the previous drive. The least number of drives required to drive the
asked by Student 
statistics
What zscore values form the boundaries for the middle 60% of a normal distribution? a. z = +0.25 and z = –0.25 b. z = +0.39 and z = –0.39 c. z = +0.52 and z = –0.52 d. z = +0.84 and z = –0.84
asked by Robbie 
reading
In Jerry Spinelli's book Milkweed does fox furs with beady black eyes symbolize the Gypsys?
asked by Anonymous 
statistics
What is wrong with the following statements? a) For a large n, the distribution of observed values will be approximately Normal b) 689599.7 rule says that "x bar" should be within m (mean) +/ 2 SD (standard deviation) about 95% of the time c) The
asked by ami 
ENGLISH
1. Which of the following quotations is the best example of a paradox? (1 point)“I’ll drain him dry as hay. . . ” “Lesser than Macbeth, and greater.” “So well thy words become thee as thy wounds. . . ” 2. Which of the following is an example
asked by Kelsey 
Chemistry
The standard molar Gibbs free energy of formation of NO2 (g) at 298 K is 51.30 kJ · mol −1 and that of N2O4 (g) is 97.82 kJ · mol −1 . What is the equilibrium constant at 25 ◦ C for the reaction 2 NO2(g) N2O4(g) ?
asked by sam 
Physics
A mountain climber, in the process of crossing between two cliffs by a rope, pauses to rest. She weighs 575 N. As the drawing shows, she is closer to the left cliff than to the right cliff, with the result that the tensions in the left and right sides of
asked by Jiim 
Chemistry
Calculate the entropy change when 2.42 g of H2 reacts with O2 according to the reaction 2 H2(g) + O2(g) → 2 H2O(ℓ) at 298 K and 1 atm pressure. The standard molar enthalpy of formation of H2O(ℓ) at 298 K is −285.8 kJ/mol. The corresponding free
asked by Austin 
Calculus
A particle moves along a horizontal line so that at any time t its position is given by x(t)=costt. Time is measured in seconds and x is measured in meters. a.) Find the velocity as a function t. Use your answer to determine the velocity of the particle
asked by Rudy 
college algebra
a man left 1\2 of his estate to his wife, 1\6 to his daughter, and the remainder an amount of $15,000, to his son. How large was the entire estate?
asked by nheil 
math
The height, h(t), of a projectile, in metres, can be modelled by the equation h(t) = 14t – 5t2, where t is the time in seconds after the projectile is released. Can the projectile ever reach a height of 9m? Explain.
asked by colin 
Math
The doubling time of a city's population is 17 years. How long does it take for the population to quadruple?
asked by Sam 
College Chemistry
calculate the theortetical percentage of water for the following hydrates. Calcium nitrate tetrahydrate Ca(No3)2 X 4H2O
asked by Rhonda 
thermochemistry
A chemical reaction takes place in a container of crosssectional area 100 cm2 . As a result of the reaction, a piston is pushed out through 19 cm against an external pressure of 596 torr. What is the value for w for this reaction?
asked by valerie 
Physics
In Case A the mass of each block is 4.8 kg. In Case B the mass of block 1 (the block behind) is 9.6 kg, and the mass of block 2 is 4.8 kg. No frictional force acts on block 1 in either Case A or Case B. However, a kinetic frictional force of 9.4 N does act
asked by robert 
statistics
A vertical line is drawn through a normal distribution at z = 0.50, and separates the distribution into two sections. What proportion of the distribution is in the larger section? a. 0.6915 b. 0.3085 c. 0.1915 d. 0.3830
asked by Robbie 
Chemistry
The combustion of 132 g of propane, C3H8, with excess oxygen liberates 6.6x10^3 kj of heat. What is the enthalpy change for the reaction below: C3H8(g) + 5O2(g) > 3CO2(g) + 4H2O(l)
asked by Kay 
Chemistry
Consider the reaction PCl3(ℓ) → PCl3(g) at 298 K. If ∆H◦ is 32.5 kJ/mol, ∆S ◦ is 93.3 J/K mol, and ∆G ◦ is 4.7 kJ/mol, what would be the boiling point of PCl3 at one atmosphere?
asked by Aust 
AP Physics B
A 1010 kg geosynchronous satellite orbits a planet similar to Earth at a radius 1.97 × 105 km from the planet’s center. Its angular speed at this radius is the same as the rotational speed of the Earth, and so they appear stationary in the sky. That is,
asked by Abby 
Economics
A firm uses a single plant with costs C = 160 + 16Q + .1Q2 and faces the price equation P = 96  .4Q. a. Find the firm’s profitmaximizing price and quantity. What is its profit? b. The firm’s production manager claims that the firm’s average cost of
asked by Philip 
physics
A car is traveling at 60.6 mph on a horizontal highway. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between road and tires on a rainy day is 0.056, what is the minimum distance in which the car will stop? Answer in units of m. m
asked by Anonymous 
chemistry
Approximately what electronegativity difference would you expect for a polar covalent bond?
asked by Boo Boo 
geometry
If the endpoints of the diameter of a circle are (3, 1) and (6, 5), find the length of the diameter.
asked by Melissa 
pharmacy
prescription chlorpheniramin 100 ml Lidocaine 2 oz banana flavoring 1 tsp Take 7 ml BID refridgerate at 40 degree F What is the total volume in ml?
asked by Pharmacy calculation 
Chemistry
Calculate the number of moles of KIO3 consumed by reaction (2.1). Remember, it is the limiting reagent. Using this information, calculate the number of moles of I that must have been consumed by reaction. Unbalanced equation: IO (aq) + I(aq) + H+(aq) ÿ
asked by senko 
Statistics
Assume that the average annual salary for a worker in the United States is 300,000 and that the annual salaries For Americans are normally distributed with a standard deviation equal to $7,000. Find the following: A. What percentage of Americans earn
asked by Ann 
AP chemistry
Given the standard molar entropies measured at 25 C and 1 ATM pressure calculate delta S for the reaction 2al + 3 mg0 > 3mg + al2o3
asked by Tilly 
Physics
A skier of mass 74.5 kg is pulled up a slope by a motordriven cable. How much work is required to pull the skier 55 m up a 31° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?
asked by Angela 
Physics
Two children who are bored while waiting for their flight at the airport decide to race from one end of the 20 long moving sidewalk to the other and back. Phillippe runs on the sidewalk at 2.0 (relative to the sidewalk). Renee runs on the floor at 2.0 .
asked by anonymous 
Physics
Starting from rest, a 11.50 kg suitcase slides 3.18 m down a frictionless ramp inclined at 40° from the floor. The suitcase then slides an additional 5.22 m along the floor before coming to a stop. (a) Determine the suitcase's speed at the bottom of the
asked by Angela 
Physics
b) If the car is moving much faster than the heavier truck when they collide, what best describes the size (or magnitude) of the forces between the car and the truck? 1. Not enough information is given to pick one of these answers. 2. Neither exerts a
asked by Amelia 
Physics
A skier travelling 37 mph encounters a 21 degree slope. With friction not considered, how far up the slope will he travel
asked by Anonymous 
Chemistry
Calculate the entropy change when 2.42 g of H2 reacts with O2 according to the reaction 2 H2(g) + O2(g) → 2 H2O(ℓ) at 298 K and 1 atm pressure. The standard molar enthalpy of formation of H2O(ℓ) at 298 K is −285.8 kJ/mol. The corresponding free
asked by sam 
PreCalculus
An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200meter running track. a) Draw a figure that visually represents the problem. Let x and y represent the length and width
asked by Laquisha 
Physics
A small plane is 150km south of the equator. The plane is flying at 220km/h at a heading of 30 degrees to the west of north. In how many minutes will the plane cross the equator?
asked by Cassie 
Math
Supplier ontime delivery performance is critical to enabling the buyer’s organization to meet its customer service commitments. Therefore, monitoring supplier delivery times is critical. Based on a great deal of historical data, a manufacturer of
asked by Priya 
Precalculus
A fiel is in the shape of a right triangle. The fence around the perimeter of the field measures 40 m. If the length of the hypotenuse is 17 m, what will be the length of other two sides.
asked by hanu2012 
Social Studies 8R
I need the definition for the following words: Fort Laramie Treaty Interstate Railroad Geronimo I know I have my textbook but it's not in the glossary. Is there a website that have a list of all social studies vocabulary words that is in the 8TH GRADE
asked by Laruen 
physics
A cat chases a mouse across a 1.3 m high table. The mouse steps out of the way, and the cat slides oﬀ the table and strikes the ﬂoor 2.1 m from the edge of the table. What was the cat’s speed when it slid oﬀ the table? The acceleration of gravity
asked by Anonymous 
Math
Triangle with vertices: D(18,12) E(6,12) F(12,6) Show that the right bisectors of the sides of triangleDEF all intersect at point C(4,4), the circumcentre of the triangle. I found the midpoint of DF then the slope of the midpoint and point E, then
asked by Anonymous 
chemistry
Cl2O2 (g)> 2ClO (g) Time [Cl2O2] (M) 0....... 6.60*10^8 172..... 5.68*10^8 345..... 4.89*10^8 517..... 4.21*10^8 690..... 3.62*10^8 862..... 3.12*10^8 Determine the value of the firstorder rate constant. For this question, you need to graph it on
asked by Brunette 
Science
A car is traveling down a hill that makes an angle of 14° with the horizontal. The driver applies her brakes, and the wheels lock so that the car begins to skid. The coefficient of kinetic friction between the tires and the road is μK = 0.55.
asked by Anonymous 
english
workers want tangible rewards such as money and a pension, but they also welcome less concrete benefits, such as acclaim for a job well done.
asked by beth 
SOCIAL STUDIES PLEESE HELP ME
THE ANSWERS ARE NOT IN MY BOOK, MS SUE AND IF THEY WERE THEN I WOULDN'T ASK FOR HELP Make an organizer to compare government under a republic (the commonwealth), an abcolute monarchy, and a constitutional monarchy. Use the following headings: the ruler,
asked by Sarahh 
math
if a square lot has an area of 256cm what the length of each side be?
asked by tina 
Chemistry
What is the concentration of Cu2+ in a solution that is 0.10 M Cu(NH3)4^2+? (Kf = 1.2 x 10^12) The answer is 8.0 x 10^4 How do I solve the problem to get the answer
asked by Kelly 
english
Which one of the following statements is true for the base forms of verb? A. when the subject of a sentence is singular, add "s" to the base form. B. Add "to" to the base form to create an adjective. C.Do not use a base form with plural subjects. D.Add
asked by amanda 
science
A transformer has 3,000 loops in its primary coil and 1,500 loops in its secondary coil. What is the voltage in the secondary coil if the voltage in the primary coil is 120 V?
asked by christine 
science
If a projectile is fired straight up at a speed of 13m/s. How long does it take to reach the top of its motion? If the acceleration due to gravity is 9.8m/ s motion (squared) answer in units of s
asked by jessica 
physics
1.Give examples of a onedimensional motion where (a) the particle moving along positive xdirection comes to rest periodically and moves forward. (b) the particle moving along positive xdirection comes to rest periodically and moves backward. 2.Give
asked by help me out it's urgent 
Elementary Statistics
Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.
asked by KAOS 
chem
calculate how to make 10 mL of 15:85 ethyl acetate:hexane solution from 2 mL of 5:95 ethyl acetate:hexane, using pure hexane and pure ethyl acetate.
asked by Julie 
Chemistry
Calculate the equilibrium constant at 300 K for the reaction HgO(s) ↽⇀ Hg(ℓ) + 1/2O2(g), given the data delta S delta h kJ J/K mol mol HgO(s) 70.29 −90.83 Hg(ℓ) 76.02 0 O2(g) 205.14 0
asked by Austin 
SOCIAL STUDIES 9
I really need help on this question so please help me. Make an organizer to compare government under a republic (the commonwealth), an abcolute monarchy, and a constitutional monarchy. Use the following headings: the ruler, the role of law, and the rights
asked by Sarahh 
medical
Mr johnson is admitted to the hospital with chest and epigastic pain. he is evaluated by er department doctor with a diagnosis of rule out myocardial infraction. mr johnson is then transferred to a larger facility for further workup.... What is the
asked by mel 
math
the question is a stock gained 2 7/8 points, lost 1 3/4 points and then gained 1/2 point and then lost 5 points. What was the total change in the stock price? I got a loss of = 3 3/8 is this correct
asked by b6 
Math
Sum of4th and the 6th terms of an a,p is 42 . While the sum of the 3rd and 9th terms of the same a.p is 52. Find the (a) first term (b)common difference (c) sum of the first ten terms of the progression. Solution
asked by Terfa sakaa 
Physics
Two forces are the only forces acting on a 7.8 kg object which moves with an accelera tion of 4.5 m/s2 in the positive y direction. One of the forces acts in the positive x direc tion and has a magnitude of 14 N. What is the magnitude of the other force
asked by Jessica 
social studies 9
Make an organizer to compare government under a republic (the commonwealth), an abcolute monarchy, and a constitutional monarchy. Use the following headings: the ruler, the role of law, and the rights of people.
asked by Sarahh 
Chemistry
Which property of gases best explains the ability of air bags to cushion the force of impact during a car accident?K
asked by Kiley 
nouns pronouns and adjectives
Which of the following shound be capitalized? a. river b railroad c drive d weather?
asked by amanda 
homework math
For every 20 cakes ordered from Barry's Bakery, 8 cakes ordered are chocolate. Which proportion can be used to determine x, the total number of cakes ordered from the bakery when 30 chocolate cakes have been ordered? A. 8/12 = x/30 B. 8/20 = x/30 C. x/8 =
asked by Cassidy 
Social Studies 8R  help!!!!!!
I need the definition for the following words: Sacramento vein national grange Roundups Treaty of Guadalupe Hidalgo Fort Laramie Treaty 1851 Battle of Little Bighorn I tried looking in my book, it's not there and Google it. I having a hard time finding the
asked by Laruen 
Check my precalc
Find the verticle, horizontal, and oblique asymtopes if any. #1 (x^2 +6x+5)/2x^2 +7x+5 y= (1/2) and x= 5/2 and 1 #2 (8x^2 +26x7)/4x1 y=2x+7 and x=1/4 #3. (x^416)/(x^22x) x= 0 and 2 y= x^2 +2x+4 thanks!
asked by Rebekah 
physics
A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 3.1 m. The ﬁ!@#$%^&ravels 6.6 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of
asked by Anonymous 
Physics
A coil of 5 ohms resistance is connected to a battery whose E.M.F. is 6 volts. What current flows in the coil?
asked by Jeremy 
Physics
A 0.230 kg block on a vertical spring with spring constant of 4.25e3 N/m is pushed downward, compressing the spring 0.048 m. When released, the block leaves the spring and travels upward vertically. How high does it rise above the point of release?
asked by Angela 
Algebra 2
x+2y+5z=1 2xy+z=z 3x+4y4z=14 solve the system using linear combination method.
asked by Erin 
math
Find the accumulated amount A if the principal P = $3,000 is invested at the interest rate of r = 9% per year for t = 5 years, compounded annually. Please round your answer to the nearest cent.
asked by Anonymous 
physics
a person standing on a moving escalator is moving relative to another person standing on the escalator true or false?
asked by Anonymous 
Math
Suppose P( A given B)= .6, P(at least one of the two events occurs)= .8, and P(exactly one of the two events occurs)=.6. Then P(A) is equal to? The answer is 2/3. Could someone please explain how to get it. Thanks so much!
asked by Jim 
chemistry
what is the shape of a molecule if the central atom has two bonded atoms and two lone pairs
asked by Boo Boo 
Physics
A motor cycle starts from rest and reaches a speed of 6m/s after travelling with uniform acceleration for 3s. What is his acceleration?
asked by Jasmine 
Statistics
You have a population that has a mean of 100 and a standard deviation of 15. You randomly draw 100 people out of this population and record the mean score. You repeat the process a large number of times recording the mean score for each sample you draw.
asked by Jared 
physics
An autographed baseball rolls oﬀ of a 0.59 m high desk and strikes the ﬂoor 0.42 m away from the desk. How fast was it rolling on the desk before it fell oﬀ? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s
asked by Anonymous 
last question
a dog toy is on sale for 20% off the orginal price. if the orginal price of the toy is $3.80 what is the discounted price? i got $3.04
asked by ellis 
chemistry
what happens in a condensation polymerization reaction?
asked by pj 
Physics
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 97.0 kg. The mass of the rock is 0.320 kg. Initially the wagon is rolling forward at a
asked by Sara 
Macroeconomics
The annual nominal rate of interest on a bank certificate of deposit is 12%. What would be the effect of an inflation rate of 13% and why?
asked by Meredith 
Biology!!!!!
7)State whether the following sentences are true or false. Rewrite them if they are false. a) Every chemical reaction taking place in cells is regulated by a specific enzyme. b) Enzymes work inside cells only. c) Enzymes are carbohydates d) An active site
asked by Nicole 
Chemistry/Quantitive Anaylsis
Before determining the amount of sodium carbonate in a sample by titration with standard hydrochloric avid the anaylst decide to check the procedure by analyzing a known sample of 98.75 (w/w)% purity. Five replicate determinations of the known gave the
asked by Brittany 
Physics
A 6 g bullet leaves the muzzle of a rifle with a speed of 333.3 m/s. What constant force is exerted on the bullet while it is traveling down the 0.9 m length of the barrel of the rifle? Answer in units of N
asked by Jessica 
physics
1.In one dimensional motion, instantaneous speed v satisfies 0 ≤ v < v0. (a) The displacement in time T must always take nonnegative values. (b) The displacement x in time T satisfies – vo T < x < vo T. (c) The acceleration is always a nonnegative
asked by help me out it's urgent 
Physics
After a day of testing race cars, you decide to take your own 1502.5 kg car onto the test track. While moving down the track at 11.4 m/s, you suddenly accelerate to 30.2 m/s in 19.2 s. What average net force have you applied to the car during that time?
asked by Jessica 
Geometry
The Great Pryamid of Cheops has a square base of 771ft. on a side and a height of 4186ft. How many rooms 35ft x 20ft x 8ft would be needed to have a volume equivalent to that of the Great Pryamid?
asked by Cindy 
science
jay heated 120mL of water that was 20 degrees celsius to 80 degrees celsius. a)how much did the temperature of water change? b) how much heat did jay add to the water? c) if jay used a liquid that was not water, the specific heat would not equal:(circle
asked by Johna 
Physics
Which of the following statements about projectile motion is not correct? a)The acceleration is constant and in one direction. b)The only force is gravity. c)In projectile motion, the motion can be broken down into perpendicular components that are
asked by Lewis 
Science
How would you prepare 10 mL of 0.08 M NaCl in sodium acetate buffer? (Stock Sodium acetate buffer: 0.1 M)
asked by Ashley 
Math
Rusell finished 6 out of 10 homework questions. which fraction shows how much of the homework he finished?
asked by Gilberto 
Algebra
Marie is 13years older than Joann. The sum of their ages is 55. How old is Joann?
asked by Sue 
Math
Graph the function. g(x)={x+2, x less than or equal to 3 1/2x2, x>3
asked by Kristi 
english
1. On Christmas, children usually get gifts from their parents. 2. At Christmas, children usually get gifts from their parents. 3. On Christmas day, children usually get gifts from their parents. 4. For Christmas, children usually get gifts from their
asked by rfvv 
chemistry
A 2.622 g sample of almond is ignited and used to melt ice in a can. a. if the almond sample melted 15.24g of ice,What is the heat produced in kcal/gram? b. If the heat from the almond sample was used to heat 100.0 mL of water at 0.0 degree centigrade.What
asked by adonis 
English ms. sue
ms. sue for the book catcher in the rye i am being ackley describing holden, and i choose the 2nd incident when holden goes to ackleys room that one night after getting socked from stradlater. i not know what be a good title for this creative writing
asked by Mohammad 
Physics
Consider the collisions between a car and a truck whose weight is much heavier than the car (M ≫ m). Friction is so small that it can be ignored. If they are both moving at the same speed when they collide, what best describes the size (or magnitude) of
asked by Amelia 
algebra
What is the equation to the word problem? Currently, you have $60 & your sister has $135. You decide to save $5 of your allowance each week,while your sister decides to spend her whole allowance plus $10 each week. How long will it be before you have as
asked by Brandi 
physics
At the surface of a certain planet, the gravitational acceleration has a magnitude of 15.0 . A 28.0 brass ball is transported to this planetWhat is the mass of the brass ball on the Earth and on the planet
asked by Anonymous 
social studies
GIFT OF THE NILE 1. What would be the main mineral resource in lower Egypt?
asked by xavier 
chemistry
A 2.622 g sample of almond is ignited and used to melt ice in a can. a. if the almond sample melted 15.24g of ice,What is the heat produced in kcal/gram?
asked by adonis 
ALGebra
Can you check 2x + 3 (x2) 3 (x6) I got 2x+3x6 3x+18 2x+3x3x= 2x 6+18 =12 Final answer : 2x+ 12
asked by Marco 
english/essay writing help
Hello! So Im having trouble with my thesis statement for an essay. My teacher gave us three questions to answer and make the answers into a thesis statement. heres the questions and instructions: Does defining human worth based on shallow measurements,
asked by Erin 
math
find the permutations one person select 4 books, 2 cds, 1 dvd from 10 books, 20 cds, and 5 dvd
asked by ashford 
Physics
You are riding on a jet ski directed at an angle upstream on a river flowing with a speed of 2.8 m/s. If your velocity relative to the ground is 8.9 m/s at an angle of 26.0° upstream, what is the speed of the jet ski relative to the water? (Note: Angles
asked by HELP PLEASE 
Behavioral Statistics
You have a population that has a mean of 100 and a standard deviation of 15. You randomly draw 100 people out of this population and record the mean score. You repeat the process a large number of times recording the mean score for each sample you draw.
asked by Jared 
Math. test tomorrow. help!
In 1960, the population was 291000. In 1970, the population was 480000. Assuming exponential growth, what is the annual percent rate? and doubling time? The answers are 5.13% and 14 years. I do not know how to get this though :( Please help!
asked by Megan 
Q E R BY UNI OPL GHR
Q AW ZWE R T TY QAZW D R T Y Y U II OLPÑE TB Q ZW C R Y YU I OLPÑH S AQ R Y V F H V A V W T D Y VRVCR ERTE S TYU GD IKL R GE TD V D YR Y UF H D YD RBN GB V S WQ AZS X T HY UJ IKOLPÑ XQ RT D YFG BFVAQ RVEDQ WAZSWEDXRFC FTGYHB UJNMIK OLPÑ QAZWS WS RD
asked by Q AZ WS E T Y UNIKOLP 
math
I make A snack mix by combining 3/4 of a pound of gummy bears with one pound of peanuts. I have 3 1/4 pounds of peanuts a) how many pounds of gummy bears do I need to make the snack mix? b) how many pounds of snack mix can I make? My answers are: I have a)
asked by EM 
chemistry
the level of water in a graduated cylinder is 52.7 ml. After a solid object weighing 100 g is added, the level is 87.4 ml. What is the density of this object?
asked by mark 
Chemistry
I need to find the average molar mass of an unknown element. The atomic mass is 120; the mass numbers of isotopes are 295, 296, 297, 298 and 299; the percent of each isotope is 2.356%, 4.325%, 15.652%, 48.452% and 29.215%. The mass of the neutron is
asked by Joe 
Physics
Block A and Block B in the figure below are connected by a string of negligible mass. There is a force on A with a magnitude of FA=20N and a force on B with a magnitude FB=34N in the directions shown in the figure. What is the tension in the string?
asked by Sam 
Algebra
Use the Rational Zero Theorum and Descartes Rule of Signs as an aid in obtaining the first root.
asked by Anonymous 
Math
when testing for a fever, what is the true positive rate for a thermometer that always reads 105 F? What is the false positive rate? **Note: the definition of fever is that the patients temperature exceeds 100 F**
asked by Z 
Chemistry/Quantitive Anaylsis
Determine the absolute and percent relative uncertainty expressing the result in the correct number of significant digits a.) 6.2 (+0.2)4.1(+0.1) b.)[9.23(+0.03)][4.21(+0.20}/21.1(+0.2) c.)log[3.1415(+0.001)] d) log[(0.104(+0.0060)]^1/2
asked by Brittany 
enviromental
Completely mixed flow ractor CSTR and plug flow reactor (PFR) may have significantly different efficiencies depending on the reaction order. This problem asks you to compare the relative reactor sizes required to ensure 99.0 % removal of wastewatwer
asked by don 
english
We left King ranch on a december day in 1873. On the Santa Fe trail, we hit bad weather. The Red river was flooded and it took us four days to get the Cattle across. All in all, it was a hard trail drive, but we got our Longhorns to the railroad at
asked by amanda 
CHEMISTRY
HOW MANY GRAMS OF CA ARE REQUIRED IF I HAVE 12.9 GRAMS OF OXYGEN TO FORM CAO
asked by TESYANA 
English
In the book, "The Memory Keeper's Daughter" by Kim Edwards, after Norah has successfully destroyed the wasps' nest, Edwards writes that there was something happening in Norah's life, "an explosion, some way in which life could never be the same" (p. 139).
asked by Crystal 
Math Figure Logic
ACROSS 1. Forty more than 24 Down ~ Nine more than 3Down Two less than IDown 7q to ;;l = '" 7. Five times 14Down 8. 3Across times 16Across .~ Four less than 22Down 11. Two hundred less than 28Across 13. Same digit repeated 16. Consecutive digits in
asked by Naomi 
English
My prompt is: Explain, in an essay with a thesis, why student papers must be relevant and how that relevance is achieved in their writing. (The requirements of this essay include why and how. Address both in the thesis) I'm pretty sure I need to address
asked by James 
Physics
Four forces act on a hotair balloon, shown from the side in the figure below. Find the magnitude and direction of the resultant force on the balloon if F1 = 5050 N, F2 = 1450 N, F3 = 950 N, and F4 = 4200 N. ______N at ______ ° clockwise from F2
asked by Dakota 
economics
Prepare a two to threepage analysis by answering the questions below. Be sure to cite your references using APA format. What is nominal GDP? What is real GDP? What is included in each? Why are these measures important? What do they tell us? What was GDP
asked by dre 
grammar
Identify which of the two sentences below contains a verb agreement error. Then, explain how to correct the problem. a. Among the guests was a private detective. b. Neither of those mattresses feel comfortable
asked by cathy 
grammar
Explain what is wrong with the following sentence and make any corrections if necessary: “Neither the mouse nor the rats could find its way through the maze
asked by cathy 
grammar
Explain what is wrong with the following sentence and revise as needed to correct the problem: “I saw mountains of uncollected trash walking along the city streets.”
asked by cathy 
Physics
I'm having problems setting up an equation to solve for time t in a projectile motion problem. What is given is horizontal position, accerlation due to gravity, the initial speed with, the angle, and the vertical position related to speed. I'm suppose to
asked by Angel 
Algebra 1
What is one divided by z to the power of three simplified?
asked by Mays 
science
It says; the temperature of 50g of water was raised from 5 degrees celsius to 85 degrees celsius. then it asks me: what amount or mass of water was heated? how do i find that out?
asked by Johna 
algebra
X5/3 =1 Or X  5 = 1 ______ 3 I'm trying to type and tell you it's x5 over 3 equals 1 I don't know how to do I think I have to do reverse operation which is multiply
asked by Marco 
Physics
Aiyana drives for 100 s at a rate of 20m/s, then turns around and drives for another 200 s at a rate of 30m/s and completes the rest of her journey at a rate of 90m/s for 100 s. what is her average velocity?
asked by Sarah 
physics
a 15.0 kg mass and a 2.00 kg mass are connected bya string that passes over a frictionless pulley, the 15.0 kg mass lies on a smooth inclined at 45.0 solve for the acceleration of the masses and the tension in the string
asked by bennie 
Algebra inequality
I have to choose a variable and write inequality For less than or equal to I'm using these keys
asked by Marco 
math hw
in 1997 there were 3344 amusement parks in the u.s.. this decreased by 148 in 2002 then grew by 47 by 2008 how many amusement parks and arcades were there in 2008? please show work
asked by ellis 
physics
A car traveling in a straight line has a velocity of +3.3 m/s. After an acceleration of 0.71 m/s2, the car's velocity is +8.8 m/s. In what time interval did the acceleration occur?
asked by logan 
Chemistry
A gasphase reaction has Kp = 2.44 × 10 20 at 25 ◦ C. Calculate ∆G 0 for this reaction. Answer in units of kJ/mol rxn
asked by sam 
math hw
in a recent year, 286 female deer were born in clark county. this is 93 fewer than the number of male deer born. how many male deer were born that year? show work
asked by ellis 
Logarithms
if log base 10 of 2 = .301 then what is log base of 10 of 2000? I know how to solve with a calculator but I'm having a hard time doing it without one.
asked by Sam 
social studies
when many native americans died from a disease called smallpox?
asked by maria 
Sociololgy
What is the main difference between parametric and nonparametric statistics?
asked by Ashford 
Algebra
Translate to a proportion and solve. Two cups of water are used for every 6 cups if flour when making paste. How many cups of flour are needed for 8 cups of water? Any type of help would be appreciated greatly. Thank you in advance.
asked by Aradia Megido 
psychology
Imagine that Rasmussen College has asked the psychology department to research the study habits of its students
asked by Jaimie 
chemistry
In a 100g sample of copper, 69 g were Cu63 while 31g were Cu65. Find the average atomic mass.
asked by Kevin 
expression
the same same number of birds, b, sitting on three different wires, then 9 birds fly off
asked by tonkie 
Political Science
What are the factors that keep an ideology alive? How does an ideology survive through decades? Is it because of the people, economic structure of a state or simply that once an ideological concept has been developed that it cannot truly disappear?
asked by Larry 
Computer Science
when testing for a fever, what is the true positive rate for a thermometer that always reads 105 F? What is the false positive rate? **Note: the definition of fever is that the patients temperature exceeds 100 F**
asked by Z 
7th Grade Math
A proportion is shown below. 7/10 = 17.5/x What is the value of x?
asked by Lauren 
College Chem
The density of the Earth is about 3.5g/cubic centimeters. If the Earth has a radius of 1.126 by 10 (to the seventh power) meters, what is its mass? (hint: volume= 4(pie)r(to the third power)/3; 1 meter=100 centimeters
asked by Sam 
Word problem math
Word problem. You cut a 2 m long board into 2 pieces . One piece is 10 cm shorter than the other. How long are each boards.? I got. 1 pc at 80!cm. the other 1pc at 100 cm Is this right ?
asked by Marco 
precal
use the given zero to find the remaining zeros of the function. h(x)=x^412x^3+36x^2+68x525 zero:43i
asked by ladybug 
Languagge
what type of leaderships are in a community?
asked by Homework ;D 
math
what is 2/5 od 550
asked by kirksey 
algebra
what is the density of a billiard ball that has a volume of 100cm cubed and a mass of 250g?
asked by karra 
statistics
given the 95% confidence interval (6.214, 7.686), interpret
asked by ty 
math
which of the following is an example of a proportional relationship between x and y? A. y = 2 B. y = 3x C. 4y + 4x = 6 D. 4y  2 = 2x  4
asked by morgan 
english
What does the backdoor of Pichot’s symbolize for Grant? please write in paragraph form
asked by shan 
Math
List the subsets of {P, N, D, Q}, where Q represents a quarter. How many subsets did you find?
asked by Alivia 
precal
how do you find an exponent variable without logarithms? ex. 8.2=1.65(0.8)^n1 thanks
asked by Derpy 
Physics
a) You have two forces, 105.5 N and 61.5 N. What is the magnitude of their resultant if the first acts upward and the second acts downward? Answer in units of N. b) What is the direction of the resultant? c) What is the magnitude of their resultant if they
asked by Jessica 
grammar
If you wish to (commend,command) learn to away
asked by Anonymous 
Microeconomics
For this part of the assignment, we will focus on the demand curve. Draw the demand curve for the APhone. Explain how the graph, price, and quantity demanded will change if the following occurs: • There is an overall increase in income. • It is
asked by sharon 
Physics
A block rests on a frictionless surface. Find its instantaneous acceleration when the spring on the left is compressed 4.48 cm while the spring on the right is stretched 10.3 cm. Each spring has a force constant of 1.05 103 N/m.
asked by Dunky 
English
Okay we are doing work from the texas write source skills book pages 6170. The directions say: write the correct word for each word in parentheses that is used incorrectly. This is it: I will Number them . Please tell me if any are wrong. Thank you!
asked by Please check me find the right words! 
math
what is the trem for 3,500*1,500 the value
asked by kate 
Algebra. .
Can you check 2/3 k = 60 I got:: 3 2 k = 60 * 3 = 90 ________________ 2 3 1 2 = 2 K = 90/2 K = 45
asked by Marco 
math homework
Melinda bought two new rugs for her bathroom. The bigger one is 12 inches tall and 20 inches wide, the smaller one is 6 inches tall and 14 inches wide. Which of the following statements is true? A.The rugs are not proportional because 20 x 12 does not
asked by Cassidy 
Algebra pls check
Is this right ? 2(w30) =6w 2w 60 = 6 w +2w =+2w 60 = 4w _____________ 4 = 4 15 = w
asked by Marco 
Math
ÚABC ~= ÚACB BD perpendicular AC The sum fo the three angles in any triangle is 180 degree. Prove: mÚCBD = 1/2 mÚBAC
asked by Tom 
english
which sentance contains an incorrect plural? A.The parties ended around midnight. B. If wishes were horses, beggars would ride. C.We spotted the foxs late in afternoon. D.I hate traffic delays.
asked by amanda 
english
In this sentence, what is the antecedent of the pronoun it? A. her B. Carla C.house D.work?
asked by amanda 
chemistry
how would you separate a mixture of NaCl, Fe pellets and water
asked by Greg 
arithmetic
I am greater than 200 but less than 500. The sum of my digits is 18. the product of my tens place digit and my 100's place digit equal 20. What digit am I ???
asked by Mikey 
algebra
5A=5b 5A=3b
asked by Melinda 
math
a 4 m by 3 m rectangular floor is covered by 300 square floor tiles. What is the side length of each tile?
asked by Anonymous 
genetics
What kinds of amino acids on histone tails are able to be phosphorylated and why?
asked by ren 
math/linear
4x + 5 = 2x + 19.. need to break down into coins and pouches. Need to know how many coins in each pouch.
asked by karina 
algebra
X5/3 =1 Or X  5 = 1 ______ 3 I'm trying to type and tell you it's x5 over 3 equals 1 I don't know how to do I think I have to do reverse operation which is multiply
asked by Marco 
Spanish
I need to put these words into sentences using correct verbsto answer the question below. “Qué estás haciendo?” cepillarse los dientes, maquillarse, bañarse, sacar la basura, acostarse, ponerse nervioso/a
asked by Lynn 
science
sally had 20g of water and it started at a temperature of 26 degrees celsius and sally cooled it to 22 degrees celsius. a)how much did the temperature of water change? (show work) B) how many calories did sally's water lose?
asked by Johna 
Math
x^44x^3+3x^2+8x16 Find the zeroes given one is x^2x4. I don't know what to do now. i tried synthetic division. pls help : D
asked by Ryan 
Precalculus
x^44x^3+3x^2+8x16 Find the zeroes given one is x^2x4. I don't know what to do now. i tried synthetic division. pls help : D
asked by Ryan 
Algebra
5=1524a/6
asked by Anonymous 
Algebra
5=1524a/6
asked by Anonymous 
chemistry
how would you separate a mixture of NaCl, Fe pellets and water
asked by Greg 
chemistry ................chemistry
what is the color a mixture of sodium and potassium compounds?? What is the color a mixture of sodium and potassium compounds (use the cobalt glass)??
asked by Maria 
math
I make A snack mix by combining 3/4 of a pound of gummy bears with one pound of peanuts. I have 3 1/4 pounds of peanuts a) how many pounds of gummy bears do I need to make the snack mix? b) how many pounds of snack mix can I make? I have a) 2 1/2 pounds of
asked by b6 
Math
x^44x^3+3x^2+8x16 Find the zeroes given one is x^2x4. I don't know what to do now. i tried synthetic division. pls help : D
asked by Ryan 
health
6. There are three major health care concerns: access, cost and quality. Is it possible to correct all three problems simultaneously?
asked by Anonymous 
Math
Could someone help be understand the general addition rule for probability? It says P(A or B)= P(A)+P(B)  P(A and B). But I get a different answer when I work it out myself: P(A or B)= P(A)(1P(B)) +P(B)(1P(A)) = P(A) P(A)P(B) +P(B)P(A)P(B) =P(A) +P(B)
asked by Jim 
writing thesis statment
how to create a thesis statment for a limited subject my mother and the general subject is family
asked by aya 
math hw
tickets to a baseball game cost $25 each plus a $4.50 handling charge per ticket. if sharon has a coupon for $10 off and orders 4 tickets,how much will she be charged?
asked by ellis 
Chemistry
Does anyone know Whats the reaction time between KIO3 & HSO3 at 50degrees C. Folks how can I find this out with a graph of time[y axis] v/s temp [x/axis]. Appreciate your insight
asked by Milin 
math
write the following number in standard, written, and expanded notation 44.4 million
asked by a 
physics
A car company states that their car can accelerate from rest to 70km/h in 7 seconds. What is the cars average acceleration?
asked by Tri County north 
Math. Increases
In 1960, the population was 291000. In 1970, the population was 480000. Assuming exponential growth, what is the annual percent rate? and doubling time? The answers are 5.13% and 14 years. I do not know how to get this though :( Please help!
asked by Megan 
Logarithms
Using the approximation log10^2=0.301, find: log10^8
asked by Sam 
physics
An automobile with an initial speed of 6.60 m/s accelerates uniformly at the rate of 3.9 m/s^2 Find the final speed of the car after 5.2s Answer in units of m/s
asked by Anonymous 
Science/chemistry
Is PO3 a mixture or compound. Is MgCl a mixture or compound. Thanks
asked by Larry 
Math. easy?
On his 13th birthday he was 112cm tall and on his 14th birthday he was 121cm tall. Assume a geometric monthly growth rate. What is this rate? I just need to know how to set it up. Please and thanks
asked by Cody 
chemistry
What is the formula for barium chloride
asked by Libby 
Maths
7y = 49w  35 I am not sure how the working out goes
asked by Paula 
Math
Which of these two are the longest measure: Inch or Decimeter?
asked by Losa 
Biomechanics
If the volume of a material is conserved under loading (Volume without force = Volume with force) what is the material’s Poisson’s ratio? You can assume that the material is isotropic (it will behave the same in every direction). Hint: take a cube and
asked by Aaron 
Math
1)let k and w be two consecutive integers such that k
asked by ANR 
physics
If the pelican was traveling at the same speed but was only 2.3 m above the water, how far would the ﬁ!@#$%^&ravel horizontally before hitting the water below? Answer in units of m
asked by Anonymous 
physics
An automobile with an initial speed of 6.60 m/s accelerates uniformly at the rate of 3.9 m/s^2 Find the final speed of the car after 5.2s Answer in units of m/s
asked by Anonymous 
social studies
a real man does not do house work?
asked by Anonymous 
Science
Which of the following is not an example of a softpath solution? a) Communityoperated ditches b) Microsprinkler systems c) New crosscountry pipelines d) Protecting a pond’s ecosystem I believe that the answer is...a
asked by Tammy 
4 grade math
what the rule for 58,2
asked by Monta 
math
why isnt anybody answering my questiions? do u have to have an account or something? if you do just tell me and ill get one!!!1 because everybody else has an answer! you should at least tell me that i need an account if i do!
asked by HELP 
physics
What is the average velocity in the following cases? You run 77.9 m West at 2.67 m/s then walk for 133 s at 8.78 m/s West.
asked by Dasha 
physics
What is the average velocity in the following cases? You run 77.9 m West at 2.67 m/s then walk for 133 s at 8.78 m/s West.
asked by Dasha 
computers
Which graphical input source acts like a copy machine but copies the image to the computer instead of paper?
asked by Anonymous 
college math
I'm trying to find why the linear function f(x)=x√x^2+2 is negative when it should be neither. why are √'s not negatives?!?!?! Is it because √x can't cross over the y axis because √x can't be negative? Then why is it that the x on the outside of
asked by Johnny 
Science
Make a spreadsheet to display how the total mass of a 500kg elevator changes as 50kg passengers are added one at a time.
asked by Shelbi 
Maths
I got the last question so please don't worry.. These are the ones I get confused with. 7y +21 x  15 = 4y 12 + 13 I need to see the numberical working out asap if someone would be so kind .. thanks P
asked by Paula 
math 7th grade
jeremiah want to construct a diagram of his dream house.he decides that he wants the area of the house to be 9600 square meters.in designing the house jeremiah decides that he wants the length of the house to be 1.5 times the width of the house
asked by alibaba 
chemistry
A radio broadcasts at 101.3 Megahertz. What is the wavelength of the signal in meters?
asked by manda 
accounting
the responsibility for issuing a report on a company's internal controls over financial reporting rests with?
asked by ko 
math homework
After 3.5 hours, Pedro had travel 217 miles. If he travels at a constant speed, how far will he have traveled after 5 hours?
asked by Cassidy