Questions Asked on
March 9, 2011

physics
Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C
asked by aj 
Chemistry
consider the equation for the following reaction at equilibrium. X+Y2Z+heat the concentration of the product could be increased by 1.adding a catalyst 2.adding more heat to the system 3.increasing the concentration of Y 4.decreasing the concentration of X
asked by Jazmin F. 
Physics
A 50.0 kg diver steps off a diving board and drops straight down into the water. The net force when in the water is an upward 1450 N. If the diver comes to rest 5.0 m below the water's surface, what is the total distance between the diving board and the
asked by Becky 
General Chem II
When the equation Cl2 > Cl + ClO3 (basic solution) is balanced using the smallest wholenumber coefficients, the coefficient of OH is??
asked by DarcY H 
Chemistry
what is the numerical value of the equilibrium constant Kgoal for the reaction CO2(g) C(s) +O2(g)? by making use of the following information: 1. 2CO2(g)+2H2O(I) = CH3COOH(I)+2O2(g), K1=5.40x10^16. 2. 2H2(g)+O2(g) = 2H2O(I), K2=1.06x10^10. 3. CH3COOH(I) 
asked by gin  More info to initial question. Please help 
math
An instrument store gives a 10% discount to all students off the original cost of an instrument. During a back to school sale an additional 15% is taken off the discounted price. Julie, a student at the local high school, purchases a flute for $306. How
asked by Anonymous 
Algebra
an investment of 72,000 was made by a business club. the investment was split into three parts and lasted for one year. the first part of the investment earned 8% interest. the second 6% and the third 9%. total interest from the investments was $5640. the
asked by Sarah 
physics
The drawing shows a version of the looptheloop trick for a small car. If the car is given an initial speed of 4.6 m/s, what is the largest value that the radius r can have if the car is to remain in contact with the circular track at all times
asked by Amanda 
physics
A child and sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 3.40 m/s at the bottom, what is the height of the hill?
asked by Allie 
science
what is the mole ratio of C5H12> C5H8 + 2H2?
asked by dee 
chemistry
Calculate the volume needed to dissolve 11.2g CuSO4 to prepare 0.140M?
asked by cris 
AP Physics
Two radioactive isotopes are extracted from spent nuclear fuel and placed in a metal container, which is then sealed and deposited in a nuclear waste disposal facility. The graph above shows how many nuclei of isotopes 1 and 2 remain as a function of time.
asked by Amanda. 
Math (Trig.)
A boat sailing from A to B travels in a straight line until the captain realizes he is off course. The boat is turned through an angle of 60 degrees, then travels another 10 km to B. The trip would have been 4 km shorter if the boat had gone straight from
asked by Connor 
Alg 1
The popultion of Medford High is 800 students & the population of WEstville High is 1240 students. Medfords pop. has been increasing by 30 students per year, while westville has been decreasing by 25 students per year. In how many yearas will the
asked by Casey 
Chemistry
How many moles of helium are contained in a 5.00L canister at 101 kPa and 30.0 degrees Celsius? I don't understand how to get the answer. My teacher didn't explain the work she just gave me the answer.
asked by Walker 
Statistics
Recently, a case of food poisoning was traced to a particular restaurant chain. The source was identified and corrective actions were taken to make sure that the food poisoning would not reoccur. Despite the response from the restaurant chain, many
asked by Bill 
physics
A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.5 m/s as in the figure below. If his speed is 27.1 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.
asked by Allie 
Auburn University
Two 95.0 W (120 \rm V) lightbulbs are wired in series, then the combination is connected to a 120 V supply How much power is dissipated by each bulb?
asked by Mitchell 
Chemistry
If a catalyst is added to a system at equilibrium and the temperature and pressure remain constant there will be no effect on the: (1) rate of the forward reaction (2) rate of the reverse reaction (3) activation energy of the reaction (4) heat of reaction
asked by Jazmin F. 
Calculus
Find the domain of the following function h(x,y) = sqrt(x9y+5)?
asked by Z32 
chemistry
How many grams of sodium chloride are needed to prepare 250 mL of a 2% solution?
asked by Mona 
Chemistry
In a reversible reaction, chemical equilibrium is attained when ? 1. Rate of the forward reaction is greater than the rate of the reverse reaction. 2. Rate of the reverse reaction is greater than the rate of the forward reaction, 3. Concentration of the
asked by Jazmin F. 
PreAlgebra
If x=yz, which of the following must be equal to xy? a. yz b. yz^2 c. y^2z d. z^2\y
asked by Bill 
math
A mother wants to invest $9,000.00 for her son’s future education. She invents a portion of the money in a bank certificate of deposit (Cd account) which earns 4% and the remainder in a saving bond that earns 7%. If the total interest earned after one
asked by MARIAH 
science
How mny moles of Mg would you need to react with 2.5 moles of O2?
asked by dee 
Geometry
You are designing dinnerware. What is the length of a side of the smallest square plate on which a 20cm chopstick can fit along a diagonal without any overhang?
asked by Alice 
Chemistry
which description applies to a system in a sealed flask that is half full of water? (sorry about that) A. only evaporation occurs, but it eventually stops. B. only condensation occurs, but it eventually stops. C. Neither evaporation nor condensation occurs
asked by Jazmin F. 
geometry
The base length of the triangle with vertices A(1,1, B(9,1), C(5,5)is multipliend by 2.Describe the effect of the change on the area. can someone help me on this one.. am stuck
asked by Carmen 
English
John Donne HOLY SONNETS 10 Death, be not proud, though some have called thee Mighty and dreadful, for thou art not so ; For those, whom thou think'st thou dost overthrow, Die not, poor Death, nor yet canst thou kill me. From rest and sleep, which but thy
asked by anthony 
Calculus
I am supposed to find when there will be 40 berry bushes. I am given the function p(t)=(16t+50t^3)^1/3. P is the population of a certain type of bush in a conservation area and t is time in years. I know that i am supposed to make p(t) = 40, but i don't
asked by Lauren 
Algebra
1) the ideal surface area of a rubber ball shipped from the factory is 50.25 square nches. the company inspector insists that the balls shipped vary no more than .3 square inches of this total. To the nearest hundreth, what is the minimum value for the
asked by anonymous 
physics
A sailor strikes the side of her ship just below the waterline. She hears the echo of the sound reflected from the ocean floor directly below 2.00 s later. How deep is the ocean at this point? (Assume the velocity of sound in water is 1560 m/s, and enter
asked by Student in Need 
physics
It has been proposed to use large inductors as energy storage devices. How much electrical energy is converted to light and thermal energy by a light bulb with a power of 195 W in one day? If the amount of energy calculated in part (a) is stored in an
asked by Sarah 
Chemistry
A 25.0cm^3 aliquot of a solution containing Fe2+ ions and Fe3+ ions was acidified and titrated against KMnO4 solution. 15.0cm^3 of 0.020M KMnO4 was needed. A second 25.0cm^3 aliquot was reduced using Zn, then titrated. This time, 19.0cm^3 of the 0.020M
asked by tam 
math
Your Porsche's gas mileage (in miles per gallon) is given as a function M(x) of speed x in miles per hour. It is found that M'(x) = 3,600x−2 − 1 (3,600x−1 + x)2 . Estimate M'(10), M'(60), and M'(110). (Round your answers to seven decimal places.)
asked by Beth 
Geography/History
Which of the countries listed below receives the most rainfall? A) Somalia B) Namibia C) Democratic Republic of Congo D) Central African Republic I cant find the answer to this anywhere, can someone help?
asked by Kaitlin 
physics
The voltage across the terminals of a 8.90 V battery is 8.00 V when the battery is connected to a 50.0 \Omega load.What is the battery's internal resistance?
asked by Mitchell 
Physics 1
A meter stick has a mass of 200g and its center of gravity is at the 50.0 cm mark. If 150g is attached to the stick at the 10 cm mark, where would an upward force on the stick need to be placed to balance the stick and the added mass?
asked by Lindsey 
statistics
A Gallup Poll asked, "In general, how often do you experience stress in your daily life  never, rarely, sometimes, or frequently?" Gallup's report said, "Results are based on telephone interviews with 1,027 national adults, aged 18 and older, conducted
asked by brian 
biology
Which of these characteristics is NOT found in the amphibians?
asked by Anonymous 
science
how much of a 0.225 M KCl solution contains 55.8g of KCl
asked by moises 
Grammar
My aunt works at Woods Hole as a scientist. What are the nouns in the sentence? Is is aunt, Woods hole and scientist?
asked by Wesley 
MATH
A truck enters a highway driving 60mph. A car enter the highway at the same place 14 minutes later and drives 66mph in the dame direction. From the time the car enters the highway, how long will it take the car to pass th truck?
asked by MARIAH 
Chemistry
What is the volume of 0.05molar HCl that is required to neutralize 50 ml of a 0.10molar Mg(OH)2 solution?
asked by Abe 
AP Calculus
An object moves along the xaxis with a velocity of v(t) = sin(pi/3)t for time t greater than or equal to 0. What is the total distance traveled by the object over the time interval 0 less than or equal to t less than or equal to 4?
asked by Sandy 
physics
A proton with a speed of 3.5 × 10 6 m/s is shot into a region between two plates that are separated by a distance of 0.23 m. As indicated in the figure, a magnetic field exists between the plates, and it is perpendicular to the velocity of the proton.
asked by Anonymous 
math
Determine whether the graph of each function is symmetric with respect to the origin. F(X)=12/x
asked by emily 
3rd Grade Math
How many degrees does the hour hand move in 4 hours?
asked by Kristiana 
PHYS HELP
Water ﬂows over a section of Niagara Falls at a rate of 1.43 × 10^6 kg/s and falls 62.5 m. The acceleration of gravity is 9.8 m/s^2. How much power is generated by the falling water? Answer in units of MW.
asked by johana 
science
At the speed of 2.5 m/s, how many seconds will it take the kayak to run a 4,500 m course? What is the speed of the kayak inn kilometer per hour? I want to work it on my own, just need help with formula please thanks
asked by Annie 
geometry
uvw=xyz if so name the postulate that applies
asked by bob 
MATH
The ratio of the distances a 7iron and a 5iron will drive a golf ball is 5 to 6. If a golfer averages 153 yards with a 7iron how far should he average with a 5iron Express your answer as an integer or mixed number. 183.6 The appliance store where the
asked by anonymous 
physics
A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 19.3° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge
asked by Allie 
Science
Determine the molar concentration of Ca^2+ and Cl in a .075 M CaCl2 solution
asked by Moses 
Chemistry
When 100mL of 1.00 M Ba (NO3)2 and 100 mL of 1.00 M Na2SO4, both at 25 degrees celsius, are mixed in a constant pressure calorimeter, a white precipitate is formed and the temperature rises to 28.1 degrees celsius. A. What is the precipitate? B. If all of
asked by Johnny 
chemistry
What mass of melamine, C3N3(NH2)3, will be obtained from 159.5 kg of urea, CO(NH2)2, if the yield of the overall reaction is 79.0 %?
asked by Lara 
chemistry
how much of a 0.225 M KCl solution contains 55.8g of KCl
asked by moises 
history
Besides gaining independence for India, what is another change that Gandhi occurred because of his actions?
asked by Anonymous 
AP Chem
What is the pH of 0.2 M solution of sodium propanoate?
asked by Leigh 
Physics
In the approximation that the Earth is a sphere of uniform density, it can be shown that the gravitational force it exerts on a mass m inside the Earth at a distance r from the center is mg(r/R), where R is the radius of the Earth. (Note that at the the
asked by Amelie 
science
determine the molar concentration of Ca^2+ and Cl in a .075 M CaCl2 solution
asked by abby 
math
Marcy is planning to borrow $12,500 with a simple interest rate of 5.2% for 4 years. How much will she pay back to the bank?
asked by steph 
geometry
A segment 12" long is divided into two segments having lengths in the ratio of 2:3. Find the length of each segment. (Hint: Let 2x and 3x represent the length of the parts.) x = ? segment 1 = (2x) = ? inches segment 2 = (3x) = ? inches
asked by terri 
basics and tools of floral design
a pick machine affixes a
asked by amanda 
MATH
Erika spent 5/6 hr on her computer visiting the history channel and the discovery channel websites. She spent 1/5 hr at the history channel website. How many hours did she spend at the discovery channel website? please help I have no idea where to begin
asked by anonymous 
MATH
IN 10 FREE THROWS, PAMELA MADE 3 SHOTS. WHAT IS THE EXPERIMENTAL PROBABILITY THAT PAMELA WILL MAKE HER NEXT FREE THROW?
asked by Jada 
physics
How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?
asked by aj 
physic
A car is driven east for a distance of 44 km, then north for 25 km, and then in a direction 27° east of north for 28 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's
asked by keef lam 
statistics
Let X be the average of a sample of 16 independent normal random variables with mean 0 and variance 1. Determine c such that P (X< c) = .5
asked by Anonymous 
statistics
Many companies today have a mandatory drug testing policy for their employees. To minimize the cost of testing, sample from 6 people are combined. If the mixture tests negative then all 6 individual employees are also negative. Find the probabilty of a
asked by Anonymous 
goemetry
A segment is divided into two parts having lengths in the ratio of 5:3. If the difference between the length of the parts is 6," find the length of each part. x = ? segment 1 = (5x) = ? inches segment 2 = (3x) = ? inches
asked by terri 
English, please help
Which sentence below has an underlined action verb? A. The poem "Easter Wings" is written in the form of wings. ("is" is underlined) B. "Paradise Lost" is an allegory. ("is" is underlined) C. In "Meditation 17," Donne compares man to an island. ("compares"
asked by anthony 
Science
when a kayak races downstreamm, its speed is clocked at 3 m/s. How far does the kayak travel in 35 s? in 1 hour?
asked by Sydney 
geometry
Suppose the dimensions of a rectangle with a perimeter of 22 inches are tripled. Find the perimeter of the new rectangle in inches.
asked by avril 
Chemistry
Can Fe2+ and Mn2+ be separated by precipitating FeS(s) and not MnS(s)? Assume [Fe2+]=[Mn2+]=[H2S]=0.10 M. Choose a [H3O+] that ensures maximum precipitation of FeS(s) but not MnS(s). Will the separation be complete? For FeS, Kspa = 6x10^2 ; for MnS, Kspa =
asked by Jenny 
Calculus
A projectile is launched at an angle of 60 degrees to the horizontal from 6.5 ft above the ground at an initial speed of 150ft/sec. Assume the xaxis is horizontal, the positive yaxis is vertical (opposite g), the ground is horizontal, and only the
asked by Z32 
Math
Alyssa is a chemist with Gemco Pharmaceutical Company. She needs to prepare 12 ounces of 9% hydrochloric acid solution. The only solution she currently has available are 4% and 12% hydrocholoric acid. How much should she use of each solution to obtain the
asked by John 
math
I MUST DRAW TWO CARDS WHOSE SUM IS NINE, FROM A STACK OF CARDS NUMBERED ONE THRU TEN. AFTER THE FIRST DRAW, I REPLACED THE CARD AND SHUFFLE THE STACK AGAIN FOR THE SECOND DRAW. WHAT IS THE CHANCE THAT MY TWO CARDS WILL HAVE A SUM OF NINE IF I DREW
asked by Americal 
English
I forgot to include these last two sentences. 1) Slaves worked either on sugar cane plantations (better of sugar cane) or in their masters' houses. If they rebelled, they could have an ear cut off or be killed. 2) For them the only way to escap ws the
asked by Mike 
chemistry
a weak acid has a pKa of 6.0. what is the ratio of conjugate acid to conjugate base at pH 5?
asked by kabelo 
chemistry
When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities. true or false?
asked by KRisten 
physics
i posted this before but no one answered. please help me: A net force of 1.6×10−15 N acts on an electron over a displacement of 5.0 cm, in the same direction as the net force. (a) What is the change in kinetic energy of the electron? (b) If the electron
asked by jamaisa 
College Math
Use the functions to find the stopping distance on wet pavement and dry pavement for a car traveling at 55 MPH.Identify the graph for each stopping distance.Explain how well your answers to item 1 model the actual stopping distances shown in Figure 3.41 on
asked by Anonymous 
FRENCH
Okay so for this question Qu'estce que tu viens de faire aujourd'hui? Je viens de parler au Francais. D'après toi, estce qu'il faut être content(e)? Oui, d'après moi, il faut être riche pour être content. Estce que tu as une amie qui est souvent en
asked by Sidney 
PHYSICS
A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of
asked by DMITRIC 
college physics
two balls of equal mass,moving with speeds of 5 meter/seconds,collide head on.find the velocity of each after impact if (a)they are stuck together (b)the collision of perfectly elastic. (c)the coefficient of restitution in 1/3?
asked by Jeff Rey 
calculus
how can I determine the domain of a function h(x): integrate from 0 to 2x1 f(t)dt, when the f(x) function is a graph shown and equations for both semicircles in the graph are: square root of 4xx(squared) and for the second one square
asked by alex 
chemistry
What is the pH of a solution made by dissolving the 37 g of KOH in 500 mL of water, with no buffer in it?
asked by Tayler 
science
Thank you so much, Ms. Sue. Is this correct? A family backpacking at yosemite took 5 hours to climb a mountain trail 7.5 km long. What was the family's average speed? I did it like this. speed=7.5km/5h = 1.5km over h. Is this right? Thank you  why am i so
asked by Sydney 
Newton' law of motion
A resultant force of 50N pulls a body of mass 10kg along a smooth horizontal surface. Calculate the acceleration with which the body is moved
asked by Alex 
Biology
We extract energy from macronutrients primarily from which of the following types of chemical reactions?
asked by Sam 
Economics
Could you give me two reasons why it is a good idea for the BBC to be funded through advertising. I have already got that it generates a higher amount of revenue. Also could you give me two reasons why it is not a good idea for the BBC to be funded through
asked by Anique 
Math
how many degrees does the hour hand move in 6 hours?
asked by Kristiana 
physics Dx
Compute the de Broglie wavelength associated with a pingpong ball that is moving with a velocity of 4 meters per second. The mass of the pingpong ball is 20 grams
asked by kyra 
Trigonometry
I have some trigonometric equations to do, but I'm pretty lost, and I have to get them done in a timely fashion, so any help would be much appreciated. "Solve the following trig equations. Give all the positive values of the angle between 0 degrees and 360
asked by Gary 
science
need to unscramble these letters to make a four word message using this pattern xxxxx xxx xxx xxx letters are teeuobftrdhsye or teeuobflrdhsye please help
asked by dawn 
chem
...A dioxincontaminated water source contains 0.044% dioxin by mass. How much dioxin is present in 6.5 L of this water? (Assume that the density of the solution is 1.00 g/mL.) thanks
asked by Rebekah 
high school chem
How many grams of a stock solution that is 92.5 percent h2s04 by mass would be needed to make 250 grams of a 35% by mass solution?
asked by Kayla 
Calculus
find the intervals where the function is increasing and the intervals where it is decreasing f(x)= (x^3/3)(x^2/2) ok i found its derivative which is (f1(x)=(x1)x my options are increasing a) (0,infinity) b) (1,0) c(infinity,0)U(1,infinity) decreasing
asked by Katia 
lang
What is preposition phrase in the follow sentence: When you are seasick, you are not really sick from the sea.
asked by jeremiah 
Alg 1
A farmer has 165 feet of fencing material in which to emclose a rectangle area. He wants the length x to be greater than 50 feet and width y to be no more than 20 feet. write a system to represent this situation.
asked by Mary 
algebra
Find the maximum value of the objective function z=24x+7y subject to the following constraints: 1. 0¡Üx¡Ü10, 0¡Üy¡Ü5. 3x + 2y ¡Ý 6
asked by Joe 
Child Care
1. The interaction between a child's biological makeup and the environmental influences that affect his or her development and behavior is called the a) balanced systems approach b) ecological systems theory c) body in the classroom analysis d) me/them
asked by Rachel 
Physics
On a dry road, a car with good tires may be able to brake with a constant deceleration of 4.17 m/s2. (a) How long does such a car, initially traveling at 22.4 m/s, take to stop? (b) How far does it travel in this time?
asked by john 
Calc.
Differentiate. y= (cos x)^x u= cos x du= sin x dx ln y = ln(cos x)^x ln y = x ln(cos x) (dy/dx)/(y)= ln(cos x) (dy/dx)= y ln(cos x) = (cos x)^x * (ln cos x) (dx/du)= x(cos x)^(x1) * (sin x) =  x sin(x)cos^(x1)(x) (dy/dx)(dx/du)=
asked by Chelsea 
physics
A ^9 Be nucleus containing four protons and five neutrons has a mass of 1.50×10−26 kg and is traveling vertically upward at 1.70 km/s. If this particle suddenly enters a horizontal magnetic field of 1.25 T pointing from west to east, find the direction
asked by Becky 
trig
I need to state the period and 2 consecutive asymptotes on the graph for the following questions. 1: y = 3 tan pi*x period: pi (?) asymptotes: ? 2: y = 2 sec 4x period: ? asymptotes: ? 3: y = csc (x/3) period: ? asymptotes: ? 4: y = 3 cot (pi*x/2) period:
asked by Michael 
reading
Does anyone know of a good short story that has to due with confidence or dedication? If so do you know the website where i can read the story? Thanks
asked by hunter 
English
Please check for any errors. Let me know if i need to place commas anywhere or delete. Attached are the Widget Sales figures for the past six months. My principle concern is the lack of effectiveness of the sales manager in the Southwest Division. The
asked by Angela 
science
Thank you. I don't know if this one is right At the speed of 2.5m/s, how many seconnds will it take the kayak to run a 4,500 m course? what is the speed of the kayak in kilometers per hour? speed= 4,500km/2.5h*60min/1 h =270,000/2.5=108,000km/h Thank you
asked by Annie 
Chemistry
A mixture containing CH3OH, HF, CH3F, and H2O, all at an initial partial pressure of 1.04 atm, is allowed to achieve equilibrium according to the equation below. At equilibrium, the partial pressure of H2O is observed to have increased by 0.43 atm.
asked by Colin 
Logarithms
I'm working on logarithmic equations and I'm stuck on how my book arrives at the next step. First, they use the change of base formula on, log(sqrt(2))(x^3  2) (sqrt(2)) is the base,changing to base 2 log(sqrt(2))(x^3  2)= log2(x^3  2)/(log2(sqrt(2)) I
asked by Helper 
science
how much of a 0.225 M KCl solution contains 55.8g of KCl
asked by moises 
Physics
I am a little confused about kinetic and potential energy regarding roller coasters. I understand that the first hill has to be the highest to gain the potential energy (PE). I hope someone can help with this example I just made up to help me understand:
asked by Paul 
physics
A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 270 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.9 m/s relative to the shore, and then hops onto an identical
asked by josh 
Chemistry
Why is potassium hydrogen phthalate (KHP) a primary standard but sodium hydroxide is not?
asked by chris 
Chemistry
Determine the volume (in mL) of 0.844 M hydrochloric acid (HCl) that must be added to 38.0 mL of 0.650 M sodium hydrogen phosphate (Na2HPO4) to yield a pH of 6.92. Assume the 5% approximation is valid and report your answer to 3 significant figures. Look
asked by Colin 
trig
solve each equation for 0 less than or equal to x greater than 2ð. cot²xcscx=1 thanks:) step by step please :)
asked by Rachael 
literary
Give examples of literary and nonliterary prose by citing examples from any source of your choice  350 words (you may quote the source).
asked by ib 
Mathematics .
I need some help with this specific question. In a computer catalog, a computer monitor is listed as being 19 inches. This distance is the diagonal distance across the screen. If the screen measures 10 inches in height, what is the actual width of the
asked by Celina 
chemistry
Calculate the molarity of each of the following solutions. 1. 61.9 g of C2H6O in 3.4 L of solution
asked by Abby 
Chemistry
A student titrates 0.100M KOH into 50.00 ml of weak acid HX. The pH of the solution is 4.25 after 20.00 ml of the base has been added, and equivalence point is reached when 40.00 ml of the base is added. 1. What is the concentration of the acid, HX ? 2.
asked by Paul 
Statistics and Probability
A computer supply house receives a large shipment of blank CDs each week. Past experience has shown that the number of flaws per CD can be described by the following probability distribution, where the random variable X represents the number of flaws per
asked by Adam 
Chemistryhelp needed
0.3g of clotrimazole (C22H17ClN2) was dissolved in 80ml of anhydrous acetic acid. This was titrated with 0.1M perchloric acid using 0.3ml of naphtholbenzein as indicator until the colour changes from brownishyellow to green. 1ml of 0.1M perchloric acid is
asked by candy 
physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by 1 = 50° from its original direction, and the struck ball moves off at 2 = 29° from the original
asked by martin 
Geometry
Find the length of the altitude of an isosceles triangle if one side has a length of 20 ft and a base of 14 ft?
asked by Jay 
math
a college conducted a survey and determined that 68% of the students attending the college owned a car.what is the ratio of the number of students who own cars to total numbers of students
asked by jennifer 
URGENT CHEMISTRY
A solution of hydrogen peroxide is 24.26% by mass and has a density of 1.11g/cm^3. the molarity of the solution? 7.54M .273M 8.03M 8.37M none of these
asked by Cotton McKnight 
physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by angle 1 = 50° from its original direction, and the struck ball moves off at angle 2 = 29° from the
asked by martin 
Calculus
Find the derivative of y=cos^6w+cos(w^6) The answer I have is 6(cosw^5sinw+wsin(w^6)) but it's not right...
asked by Catherine 
Geography/History
I'm doing an alternate test on SubSaharan Africa, and Africa. I cant find all the answers in the book, and i can't find a good website. Can someone help me find a good website for SubSaharan Africa?
asked by Kaitlin 
accounting
Lone Star Theatre Inc. owns and operates movie theaters throughout Arizona and Texas. Lone Star Theatre has declared the following annual dividends over a sixyear period: 2005, $7,500; 2006, $9,000; 2007, $30,000; 2008, $30,000; 2009, $40,000; and 2010,
asked by michelle 
Geometry
"Find the length of the altitude, x, to the nearest hundredth of a meter." The base of the triangle is 14 feet.
asked by Isiah 
physic
How much work does gravity do on a 0.0150kg ball falling from a height of 10.0m
asked by Anonymous 
chemistry
What is the vapor pressure (in mm Hg) of a solution of 12.5 g of glucose ( C6H12O6) in 75.0 g of methanol (CH3OH) at 27 degrees celcius? The vapor pressure of pure methanol at 27 degrees celcius is 140 mm Hg.
asked by kyle 
chemistry
I am not understanding this molarity stuff. Can someone please show me step by step on how to solve this question? What is the molarity of 0.50 L of solution containing 40.0 g of CaCO3?
asked by Jen 
French
How would you say Ash Wednesday and Easter in French? My French teacher said it today, but I just can't recall what it was now...
asked by Tania 
math
A broken clover has 2 leaves, a normal clover has 3 leaves, and a luckey clover has leaves. Ia a bunch of these clovers, there are twice as many normal clovers as broken clovers and 5 times as many normal clovers as lucky clovers. the bunch has a total of
asked by Dharma 
physics
How to solve a resultant force of 50N pulls a body of mass 10kg along a smooth horizontal surface. Calculate the acceleration with which the body is moved
asked by Alex 
physics
How to solve a resultant force of 50N pulls a body of mass 10kg along a smooth horizontal surface. Calculate the acceleration with which the body is moved
asked by Alex 
Chemistry
A. only evaporation occurs, but it eventually stops. B. only condensation occurs, but it eventually stops. C. Neither evaporation nor condensation occurs D. Both evaporation and condensation occur. i think its D, am i right ?
asked by Jazmin F. 
marketing
is the process of naming broad productmarkets and then segmenting these broad productmarkets in order to select target markets and develop suitable marketing mixes.
asked by Anonymous 
math
a figure on the left is the base of a right solid whose sides are 10 centimeters tall. what is the volume of the solid in cubic centimeters?
asked by Hayley 
PreCalculus
Completing the Square 1) 9m^2  20m  21 = 0 2) 10x^2  4x 32 = 0
asked by Camile 
Social Studies Paper
I have to write a paper about my neighborhood (east flat rock NC) using 3 of the 5 themes of geography. The 3 that I used were: Place, Location, and HumanEnvironment Interaction. I need some help on some ideas I could use for humanenvironment
asked by Kat 
chemistry
I don't understand this zwitterion form . Here is the question. write the zwitterion form of the amino acid cysteins shown in the follwing figure. If the pI for cysteine is 5.1 at what pH will the zwitterions be the predominant form? Can you please show me
asked by Jen 
social studies
what did the dutch call their colony in north america
asked by samuel 
Economics
Could you give me two reasons why it is a good idea for the BBC to be funded through advertising. I have already got that it generates a higher amount of revenue. Also could you give me two reasons why it is not a good idea for the BBC to be funded through
asked by Anique 
english
Do all essays require a thesis
asked by David 
algebra
The function H described by H(x) = 2.75x + 71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long.
asked by sara 
Statistics and Probability
Suppose that the proportion of students who used the Internet as their major resource for school in the past was 66%. A sample of 1000 students was taken and the number of students who used the Internet for their school during the past year was recorded.
asked by Adam 
statistics
Describe the major difference between a population of scores with a mean=50, standard deviation=6, and a sample means of n=36 selected from a mean=50, standard deviation=6.
asked by Nneka 
5th grade math
How to change 6/8 into a decimal, and into a percent can someone help me please
asked by Leslie 
PHYSICS please HELP
A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity at a distance of
asked by DMITRIC 
English
Can you please check these five sentences for me I find it difficult to correct. 1)1984 can be considered (as) an antiutopian novel because it provides the description of a society in which a totalitarian government controls any action of the people. 2)In
asked by Mike 
chemistry
if i want to change the pH of any solution from 5 to 8 what the volume of NaOH 0.1 N needed
asked by mohamed 
Math
What is x to the fourth power minus 20x plus 64 equals 0
asked by Alisha 
Story about my future Part 2
Down below is the other path I have written about. Could you please check to see if it covers all these factors.  cost of living on your own factors that add to your achievement in the workplace educational attainment and earning potential current
asked by Sara 
Physical science
what is the concentration hcl react with zn
asked by Charles 
math: pre calculus
How do I find the exact value of sec(2.4)?
asked by jessi 
English  Native speakers
Hello! Which expression do you use the most in English? Don't take amiss to me or something similar? I am looking for a verb but I can't seem to find it in English. Is there also an expression like to take harm on someone? I hope you get the idea which
asked by Mark 
physics
Your niece is working on a unique science fair project  a clock built around a small mass vibrating on a little spring. Her prototype version is working ok, but it's running too slow. Given your experience in this course, you suggest to her that a stiffer
asked by Student in Need 
critical thinking
What is one important distinction you could not overlook making when critically evaluating the information provided in these materials about the Boston Tea Party?
asked by Anonymous 
ALGEBRA II
In circle O, chords AB and CD are congruent. AB measures 2x + y, while CD has a length of 16.5. Two smaller chords, GH and KL, are also congruent. GH measures x + 2y, while KL has a length of 13.5. Find the values of x and y.
asked by ELIZA 
math
The ratio of dimes to nickels in jan's change box is 2/3. jan has 75 cents in nickles. how many nickes does jan have? 15? would that be correct? and would she have 10 dimes?
asked by jill 
math
laura has a roll of ribbon there are 29 yards of ribbon on the roll what equation can laura use to find the number of inches of ribbon on the roll
asked by z 
Economics  repost  assistance is appreciated
A)Who has more monopoly powerWalMart or the concessionaire who has acquired the franchise to sell beer, hot dogs, colas, candy, etc., at a Washington Redskins football game? Explain. B)Who has more monopsony powerWalMart or teams in the National
asked by Tasha 
physics
1.A car is traveling a road that includes two sides of an equilateral triangle with a constant speed s. What is the magnitude of the average velocity v of the car? 2.A ship crosses a river aiming at the angle theta to the left from the straight courses.
asked by sandhu 
geometry
I have a isosceles trapezoid question. The top line is 13" long, the sides are 60" long, and the bottom is 27" long. I do not know what is the equation or formula is to determine the acute angle between the bottom and sides or top and sides. Can you please
asked by Steven 
Chemistry
What is the boiling point of a solution made by mixing 115 g NaCl in 1 kg of water? (Kb for water is 0.512 C/m)
asked by Brenna 
English
I'm writing an easy about my hero. I need s strong into sentence with a a action work. So carving have "Taylor swift has impacted my life..''
asked by EnglishLove 
algebra
0 cm^3 0f a normal specimen of human blood contains 1.2 g of hemoglobin. how many grams does 45 cm^3 of the same blood contain?
asked by Anonymous 
English
I forgot to include the following sentences. I hope you can have a look at them, too. 1) 1984 can be considered an antiutopian novel, which shows Orwell's sympathy for all the people who were murdered and exhiliated in totalitarian dictatorships (?) in
asked by Mike 
ETH 125
I'm reviewing the current issues between the federal government and the Native Americans for a CheckPoint Assignment in week 6. My question; when reviewing the article, on the Indian Country website, how do I decipher which legislation is linked to the
asked by STS 
English  Native speakers
Thank you Writeacher for your answers today :) Here are some other questions :) : Do you say We've had a lot of rain recently or lots of rain? Can someone explain the difference between those two phrases  in your own words. Also what exactly is the
asked by Mark 
PLEASE HELP
Simplify the following algebraic expressions: Evaluate; P(1/2) if P(x)= 2X^4 + X^3 + 12
asked by peg 
geometry
if I had a prism with the dimensions of 9 yards x 6 yards x 3 yards what is the deminsion in cubic feet?
asked by kelly 
Chemistry
X + Y > Q The reaction above has the rate law: rate = k[X]³. When [X] is doubled the rate increases by a factor of ?
asked by Anthony 
English
Thank you for improving my punctuation. Here are some more sentences I'm doubtful about.In particular, I find it difficult to express numbers 7 and 9. 1) However, while looking at the picture, a cry of pain and indignation comes from him. 2) He can see no
asked by Mike 
Math
On three consecutive passes, a football team gains 8 yards, loses 24 yards, and gains 42 yards. What is the number that rep the total net yardage?
asked by Leann 
Math
Can someone please simplify this i am lost. X(x+1)+(x+1)(x+2) show your work
asked by Tshepiso mphehlo 
prealgebra
The length of a rectangle is 7cm greater than the width. Find the length and the width if the perimeter is 54cm
asked by Bob 
Calculus
Could someone please explain this to me? Differentiate. h(u)= 10^(sqrt(u)) h'(u)= 10^(sqrt(u))*log(10)(d/du(sqrt(u))) h'(u)= 10^(sqrt(u))*((1)/(2*sqrt(u)))*log(10)
asked by CMM 
math
one fifth of my life I wanted to become a teacher. 3/25 of my life I was a teenager. 9/25 of my life I was married to my husband. Threefifth of my life my son was born. Fifteen years after that, my daughter was born. Seven years after that I got a divorce
asked by ann 
Calculus
Find the derivative of (b/(a+z^2))^2 Assuming that a and b are constants...
asked by Catherine 
Math
How to change 320% into a decimal and a fraction
asked by Matthew 
physics
1.A car is traveling a road that includes two sides of an equilateral triangle with a constant speed s. What is the magnitude of the average velocity v of the car? 2.A ship crosses a river aiming at the angle theta to the left from the straight courses.
asked by sandhu 
IV help
What is the drip rate for infusing an IV at a KVO rate using a 60 ttys/mL administration set?
asked by Tony 
Calculus
Find the domain: f(x)= x27x+12/x48x3+13x2+30x72
asked by Zukii 
Calculus
Find the derivative of f. you may simplify before differentiating f(x)= x27x+12/x48x3+13x2+30x72
asked by HELP!! 
math
In an 8 inch square cake pan and a 10 inch square cake pan. what is the difference in volume each pan will hold. each pan is 1.5 inches high
asked by Shan 
chemistry
How many grams of water should you add to 31.0g of sucrose,C12H22O11, to get a 0.855 m solution?
asked by kyle 
gcse geography
please could someone help me find the definition of a sandy beach. ive looked but cant find anything.thanks:)
asked by Leanne 
Calculus
Find the derivative of f(x)=sqrt(9−sinx/1−cosx) Everthing is included in the square root...
asked by Cady 
English
I have a few more sentences on Dorian's death I'd like you to check. Thank you. 1)Dorian throws himself on the sofa and starts thinking of his past. He recognizes he has filled his mind with corruption, committed horrible crimes and has exerted an evil
asked by Mike 
Math
ok so, a square is 9.3cm at the top so what is the area? I got the perimeter and it is 37.2 cm but I just cant understand how to do area and get the right answer
asked by Olivia 
english
I don't understand the book I'm reading. Its called Goodnight Mr Tom. We writing exams on this but I really need help understanding this book. Please help me.
asked by jesse 
geometry
How do you find the diagnol length on a 12 ft. by 12 ft. square
asked by Redwing 
Chemistry
How do you know when to use a coordinate bond with molecular compounds?
asked by Emily 
Algebra
which number is not written n scientfc notaton? a)15.5 x 10^4 b)2.567x 10^5 c)6.7 x 10^3 d) none of these I think D
asked by anonymous 
PHYSICS
The hydraulic gradient in an 10ftthick aquifer at a site of uniform flow prior to pumping is 0.02. The hydraulic conductivity is 100 ft/day. True or False: After pumping starts at a well at a rate of 10,000 cubic feet per day, the distance from the well
asked by MARK 
Calculus AB
Consider the region trapped between the graphs of y=9x^2 and y=113x. a) find the area of this region b) set up an integral which computes the volume of the solid of rotation obtained by rotating this region about the xaxis c) set up an integral which
asked by Nellie 
Statistics and Probability
Suppose that the proportion of students who used the Internet as their major resource for school in the past was 66%. A sample of 1000 students was taken and the number of students who used the Internet for their school during the past year was recorded.
asked by Adam 
geometria
necesito construir un triangulo de medidas lado A 48 lado B 60 y lado C 75 grados
asked by jasbleidy 
English
I'm finding it dfficult to check a few more sentences. These are the last on this theme. Thank you. 1)He studied at Eton college, where misbehaved students used to be beaten. 2) On his return to London he experienced poverty 3) At the time (not "in this
asked by Mike 
statistic
Given a normal population with ì = 40 and ó = 8, what is the probability of obtaining a sample mean between 39 and 41 for a sample of n = 16 scores?
asked by kim 
physics
safiya places a 5.okilogram brick on chair in the classroom.the chair is 1.o meter off the ground.what is the gravitation potential of the brick if it falls off the chair?remember that gravity equals 9.8 meter per second squared.
asked by ROSE 
English
Could you please check the correction of your first sentence? I included a few more sentences on Stevenson's novel. Could you please have a look at them? Thank you. 1 a) 1984 can be considered as antiutopian novel. 1)The single dominant theme in Dr Jekyll
asked by Mike 
math
my son has to draw a figure with an area of 63 and a perimeter of 32.how do he go about doing it?
asked by ed 
Math
Have to explain how to use a graph to determine the number of solutions system. Am lost on what they want.
asked by Mary 
Physics
Suppose a cube that measures 0.020 m on each side were made of water. Find its volume, mass, and weight.
asked by May 
general
can we ask personal advice questions on here too? or just homework?
asked by anonymous 
social studies
How do you feel about medical testing on disable people, and prison inmates.
asked by josh howard 
art
can anyone help with art/101 final
asked by Anonymous 
PHYSICS
How does the magnitude of the electrical force between two charged objects depend on the distance between the charges? I really frustrated right now, and I can't figure out the answer too this question. Help pleeease :)
asked by RIHANNA 
Business
Discuss the pros and cons of imposing quotas on some imported goods. How would this affect the American economy?
asked by Anonymous 
Math Algebra II
SOLVE.. Please show the steps so I'll understand it 8^x2=(1/16)
asked by Lala 
Algebra
Rewrite using distributive property 7(x7)
asked by Tammy 
science
Okay, Ms. Sue. I got this and I don't think that it is right. this is the question  I wrote the answer at the bottom. I don't think that its right. speed=4,500km/2.5h*60min/1 h=270,000/2.5=108,000km/h I think that i'm confused. Thanks
asked by Annie 
Calculus
Find the dereivative of: y =((x^2+1)/2)^6 I really don't know the process to do these one, I tryed to use the quotient rule but then I don't know how to do with the ^6 so I don't think that's the way to do it...
asked by Cecille 
Child Care
1.At what age does exercise begin to result in strength in boys and girls? a)between ages 1 and 2 b)between ages 3 and 4 c)between ages 5 and 6 d)between ages 6 and 7 2.Temperatures in child care education setting should be set at __ in the summer and __
asked by Destiny 
Language
Clue Word Not the problem, but the... A_ S _ _ R A boat for pleasure trips Y_ _ _ T
asked by Curly Sue 
physics
a glider of length 10.00 cm slides down an air track. It passes through the lower photogate in .50 sec. A little later it passes through the lower photogate 100.00 cm down the track, in .25 sec. Calculate initial velocity,final velocity, and acceleration.
asked by bill 
math
how do i solve this S(1)=10000(1e^.5(1)) the answer for this is 3935 buy i don't know how it came up with that answer. could anyone please explain to me how thanks in advance!
asked by anonymous 
math
In the square if part A is 1/4 of the square and part C is 1/10 of the square, what percent of the square is part B?
asked by jordan 
algebra
Simplify the following algebraic expressions: Evaluate; P(1/2) if P(x)= 2X^4 + X^3 + 12
asked by peg 
hum/176
In this week's video, Bill Goodykoontz discusses the effects of violence on audiences and gamers. How much responsibility do filmmakers, game manufacturers, etc. bear when it comes to depicting violence? How much responsibility do parents have in allowing
asked by Darlene 
science
what is a traige according to first aid
asked by ntwatwa 
geometry
if a triangle has a perimeter of 72 and a ratio of 3:4:5. what is the length of all three sides and angles
asked by jalisa 
math
Please help my equivalent fraction. I am greater than 1/5 and less than 1/2. My denominator is between 2 and 4. What fraction am I? Thanks for the help..
asked by Dylan 
prealgebra
In the equation A=ur^2, if r is doubled, by what number is A multiplied and why? a. 2 b. 1\2 c. 4 d. 1\4
asked by Bill 
Algebra
19/21 divided by 4 6/7 give estimate anser & exact answer
asked by Tammy 
Science
AWhen it is time to leave the part, the familhy could only drive at 60 km/h in the mountains. How long would it take them to travl the 270 km to their home? How fast would they need to travel to make the trip in 3h? I want to see how i write the formula
asked by Annie 
science
Ms. Sue, I want to check an answer ok? A kayak races 100m in 50s. What is its speed? This is my answer speed=100m/50s=2m/s. Thank you
asked by Annie 
Visual Basic
How do I display 1/2 as a signle character in a text box?
asked by Kojo 
Math
a rectangle is 8 ft at the top and on the side its 4.2ft i got 24.4ft for the perimeter and 33.6ft for the area is that corect?
asked by Olivia 
Science
I want to thank you for all the help, I just found this sight today. I think that you and the sight are realy COOL!!!!! thanks :)
asked by Annie 
HELP NOW MATH
4n − 5 = 3n + 2 I know its 6 but i don't know how to solve it.!!!!!!!!@@@23q9
asked by PLEASE 
math
A ladder leans against a wall four feet above the ground. The base of the ladder is three feet from the wall. How long is the ladder?
asked by anonymous 
Story about Future
Compose a 2 path story of your future. The story which you are going to write must explore 2 choices: what will take place in your future if you don’t gruduate upper secondary school and receive some postsecondary education. And the other part is that
asked by Sara 
chem
1.02 mols of helium contain how many atoms?
asked by Anonymous 
calc
f'(x)=(24)/((2sinx+6cosx)^2) find equation of line y=mx+b
asked by Hannah 
Math
If Alex and Steven are spinning to see who gets to take 711 on a trip. Alex decides to spin himself to make sure Steven doesn't cheat. He spins himself 14 times. They decide if Alex spins a 4 or any number less than 4 he gets to go on a trip with 711. If
asked by A. Plz Answer My Queation I NEED TO GO TO SLEEP 
math
what is the greater common factor of 6/12 need all divisible numbers for both and put in lowest form as a fraction
asked by Kylie 
Math
How to simplify this equaiton? 5[55(1484)]=? I know that what is in the ( ) comes first so what do I do after 5[55(70)] please help me understand this.
asked by Leann 
Trigonometry
how do you solve for y=sinX+2. just the phase shift and period. even how to graph if anyone knows. i got stuck with this one
asked by Mariah 
MATH
9 is a member of which subset of real numbers
asked by Angel 
English
I still have a few doubts. I hope you can have a look at them, too. 1) Winston is a thrynineyearold man characterized (?) by blonde hair and a ruddy complexion, caused by the use of blunt razor blades. 2) At the beginning of the book he enters his modes
asked by Mike 
HCA 220
I am in week 4 and need guidance on where to begin my power point presentation. I have only did one other power point and it was nothing like this. I am completely at a loss. I just need an example of what to do as this seems way over my head. Help! Gem
asked by gem 
English
Can you please check my last sentences. I really need to know which expressions are best. Thank you. 1)He studied at Eton college, where misbehaved students used to be beaten. 2) On his return to London he experienced poverty. 3) At the time (not "in this
asked by Mike 
Science
How did people shape the Earth? Please answer thanks
asked by Melea 
Latin
latin root word for patron
asked by Danielle 
art
Can someone give me an example of installation art?
asked by anonymous 
English
I checked the spelling mistakes and I reworded some of the sentences. Can you please check them and tell me how I can improve them? Thank you. 1)Dorian throws himself on the sofa, and starts thinking of his past. He recognizes he has filled his mind with
asked by Mike 
algebra
whats x²+7x+10÷x6 x
asked by Anonymous 
math
If 4/5 of a number is 16,Wat is 1/5 of the number?
asked by Sam 
math
How do the acute and obtuse angles compare to the right angle?
asked by kyle 
Math
Find the indicated out puts for f(x)=3x squared 5x if f(0)= f(1)= f(2)=
asked by Leann 
spanish
. Hay una variedad de las bebidas y los postres deliciosos también My teacher marked that sentence down, and according to her there is suppose to be a verb between postres and deliciosos, which i am having trouble figuring out. Can any one help?
asked by Dave 
Geography
what is an Icelandic home's average room temperature?
asked by Alyonka 
English
Is impacted an action word?
asked by EnglishLove 
math
How do you simplify equations; ex. 8x+3(4x+5)2x Caxn someone explain not just post the answer.thanx(:
asked by ashleey(: 
science
what will it cost to heat 1.5Mg of water from room temperature to 90degrees celcius using electricity at 60% efficiency?
asked by Ngcebo 
math?
9/54 ito percent
asked by lily 
Geography
What's the importance of the Mississippi River? Thanks in advance
asked by Strawberryhat 
Calculus A
1. Find the slope m and an equation of the tangent line to the graph of the function f a the point (2, 38) f(x)=9x 2x +6
asked by Anonymous 
Math
which mixed number is greatest? 1 1/2 1 1/3 1 1/4 1 2/3
asked by Ana 
math
Turn 7 21 into a percent and decimal. First simplify the fraction. Show your answer on the number line.
asked by julie 
english
is there such thing as "exercising of oversight on" ....
asked by flame 
math
what would 120/18 reduce to? 6 1/3
asked by jill 
math
order from least to the greatest 3/10,4/5,18,20,1/20,7/10
asked by kayla 
alg 1
how do you work out d2+3d10=0?
asked by andrea hammock 
math?
4/11 into a prcnt
asked by lily 
Liberal Arts Math
what is k(p)= (p+3)(p7)
asked by Tim