Questions Asked on
March 20, 2011

Chemistry
In the reaction 2H2S + 3O2 > 2SO2 +2H2O, the oxidizing agent is 1.oxygen 2.water 3.sulfur dioxide 4.hydrogen sulfide oxygen?
asked by Alexis 
Chemistry
which equation represents an oxidationreduction reaction? 1.HCl+KOH>KCl+H2O 2.4HCl+MnO2>MnCl2+2H2O+Cl2 3.2HCl+CaCO3>CaCl2+H2O+CO2 4.2HCl+FeS>FeCl2+H2S
asked by Alexis 
physics
if electron are caused to fall through a potential difference of 100000 voltage , determine their final speed if they were initially at rest.
asked by chandankumar 
calculus
can you please help me solve this problem if dy/dx=ycosx and y=3 when x=0, then y=
asked by christine 
Chemistry
Explain why the freezing point of a pure solvent is constant, whereas the freezing point of a solution decreases with steady cooling.
asked by Cassie 
Physics
Two metal spheres having charges of +4.0 x 10^6 coulomb and +2.0 x 10^5 coulomb, respectively, are brought into contact and then separated. After separation, the charge on each sphere is...
asked by Dom 
Physics
Search: The figure shows three crates being pushed over a concrete floor by a horizontal force of F magnitude 440 N. The masses of the crates are m1 = 30.0 kg, m2 = 10.0 kg, and m3 = 20.0 kg. The coefficient of kinetic friction between the floor and
asked by Sarah 
Chem
what occurs during the reaction below 4Hcl+MnO2>MnCl2+2H2O+Cl2 1.the manganese is reduced and its oxidation number changes from +4 to +2. 2.the manganese is oxidized and its oxidation number changes from +4 to +2. 3.the manganese is reduced and its
asked by Tina 
Math
I cannot remember how to figure out this problem. "Ten friends share 3 pizzas equally. What fraction of a whole pizza does each friend get?" Would it be 3/10? Not looking for the actual answer but really how i can figure it out. Thank you!
asked by Renee 
chemistry
Barium sulfate is listed as insoluble on solubility tables. It does, however, dissolve to a small extent. Its solubility at 50 'C is 0.00034g in 100. g of water. Express this solubility in parts per million I know the equation is ppm= (grams of solute/L
asked by Emily 
physics
A 680 newton student runs up a flight of stairs 3.5 m high in 11.4 seconds. The student takese 8.5 seconds to run up the same flight of stairs during a second trial. 1)Find the work done by the 680 N student in climbing the stairs 2) Determine the power
asked by kriti 
Physics
a) If the work function for a certain metal is 1.8 eV, What is the stopping potential for electrons ejected from the metal when light of wavelength 400 nm shines on the metal? b) What is the maximum speed of the ejected electrons?
asked by Vanda 
Chemistry
How many grams of potassium chlorate, KClO3(s) must decompose to produce potassium chloride, KCl(s), and 1.45 grams of oxygen gas?
asked by franci 
physics
1) what is the efficiency of a frictionless inclined plane? 2) how would you increase the efficiency pf an inclined plane?
asked by Navroz 
reading
what does "sittinghen" mad mean
asked by Anonymous 
Physics
A car going 50mi/h overtakes and passes another car moving at 45 mi/h. what length of road is required for the operation? assume that each car is 15 ft long and that there is a 60ft space between them before and after passing. taking into account the
asked by Peter Adrian Ngo 
reading
What is the meaning of the simile like a cat in a corn crib
asked by Anonymous 
physics
1.) A small sphere of charge 2.4 μC experience a force of 0.36 N when a second sphere of unknown charge is placed 5.5 cm from it. What is the charge of the second sphere? 2.) Two identically charged sphere placed 12 cm apart have an electric force of0.28
asked by Christine 
Chemistry
The maximum solubility of silver sulfate, Ag2SO4 [molar mass = 312], is 4.50 g/L at 25°C. Silver sulfate dissociates by the reaction below: Ag2SO4(s) 2 Ag+ (aq)+ SO4¯² (aq) 1.What are the [Ag+] and [SO4¯²] in a saturated solution of silver sulfate
asked by Paul 
physics
A flat (unbanked) curve on a highway has a radius of 230.0 . A car rounds the curve at a speed of 28.0 .What is the minimum coefficient of friction that will prevent sliding?
asked by Anonymous 
algebra (parabolas)
you throw a wad of used paper towards a wastebasket from a height of about 1.3 feet above the floor with an initial vertical velocity of 3 feet per second. a. write and graph a function that models the height h (in feet) of the paper t seconds after it is
asked by Bri 
Chemistry
5.00kg glycol, C2H4(OH)2, [this is antifreeze!] is added to your radiator. If your radiator contains 12.0kg of water, what would be the freezing point of the waterantifreeze mixture? The molal freezing point depression constant for water is 1.86 degrees
asked by Cassie 
physics
A driver of a car traveling at 15.9 m/s applies the brakes, causing a uniform deceleration of 1.7 m/s2. How long does it take the car to accelerate to a final speed of 13.0 m/s? Answer in units of s. b) How far has the car moved during the braking period?
asked by maria 
reading
what does the simile as wet as a dirt dauber's nest mean
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 Alexandria 
Chemistry
in the reaction:Ni+SN4+>Ni2+ (+)Sn2+ which species has been reduced? 1.Ni 2.Sn4+ 3.Ni2+ 4.Sn2+ i know its def Sn but im not sure which one.
asked by Alexis 
History
How did free enterprise effect industrialization?
asked by Ann 
Math Algebra 2
A rectangular garden is fenced on three sides with a wall forming the fourth side. the total length of the fence is 70m. the area if the garden is 600m^2. find the dimensions of the garden.
asked by Ana 
Chemistry (Acids and Bases)
THIS HAS TWO PARTS NaOH(s) was added to 1.0 L of HCl(aq) 0.42 M. 1) Calculate [H3O+] in the solution after the addition of 0.13 mol of NaOH(s). 2) Calculate [H3O+] in the solution after the addition of 0.81 mol of NaOH(s).
asked by Andy 
biology
what is the function of the rat diastema??
asked by kacy 
physics
an object weighing 15 newtons is lifted from the ground to a height of 0.22 meter. What is the approximate increase in the object's gravitational potential energy?
asked by anonymous 
Chemistry
3.92g of a nondissociating compound are dissolved in 400.g of liquid benzene. The freezing point of the solution is 5.19 degrees celsius. Calculate the molar mass of the compound. (The freezing point of the pure benzene is 5.50 degrees celsius and its
asked by Cassie 
Math
Tracy Company, a manufacturer of air conditioners, sold 100 units to Thomas Company on November 26. The units have a list price of $500 each, but Thomas was given a 30% trade discount. The terms of the sale were 2/10, n/30. Thomas uses a periodic inventory
asked by Bobbi Loffredo 
physics
A car is driven 110 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? ...km ... degrees south of west
asked by Jessica 
Chemistry
Calculate the moles of oxygen gas needed t burn 1.22 moles of ammonia, NH3(g). Find the moles of nitrogen dioxide gas and gaseous water produced.
asked by franci 
physics
A dog sits 3.0 m from the center of a merry goround. a) If the dog undergoes a 1.2 m/s2 cen tripetal acceleration, what is the dog’s linear speed? Answer in units of m/s. b)What is the angular speed of the merrygo round? Answer in units of rad/s.
asked by maria 
physics
A ball is dropped from 1.5 m and rebounds to 1.2m. How many times will it bounce before losing 90% of it's energy? I assumed energy was hight times gravity so when the rebound was only 10% of the original amount, 90% of the energy is lost. Is this the
asked by Mark 
physics
A 20. kg block is placed at the top of a 10. meterlong inclined plane. The block starts from rest and slides without friction down the length of the incline. (A diagram shows a height of 5.0 m, the 10. m length of incline/hypotenuse and the 20. kg block
asked by Sejul 
chemistry ASAP please!!
One reaction that destroys O3 molecules in the stratosphere is NO + O3 NO2 + O2 When this reaction was studied in the laboratory, it was found to be first order with respect to both NO and O3 with a rate constant of 1.9 x 104 mol L1S1. If [NO] = 1.2
asked by Massiel 
physics
An airplane has an effective wing surface area of 16 square meter that is generating the lifting force. In level flight the air speed over the top of the wings is 62m/s, while the air speed beneath the wings is 54m/s. What is the weight of the plane?
asked by alistair 
chemsitry
Calculate the mass in grams of sodium bromide, NaBr, are needed to prepare 250.0 mL of a solution of sodium bromide that is 3.50% (m/v).
asked by allen 
science
Is it possible to study just one atome?why?
asked by joe 
calculus
find an equation of the curve that satisfies dy/dx=4x^3y and whose yintercept is 7
asked by linda 
Physics
Consider a conducting spherical shell with inner radius b = 0.862 m and outer radius c = 1.21 m. There is a net charge q2 = 3.82 ìC on the shell. At its center, within the hollow cavity, there is a point charge q1 = 2.89 ìC. Determine the flux through
asked by Alicia 
mba business reserach methods
Sampling A manufacturing company's quality control personnel have recorded the proportion of defective items for each of 500 monthly shipments of one of the computer components that the company produces. See data below. The company doesn't have time to
asked by Carolina 
physics
After a completely inelastic collision between two objects of equal mass, each having initial speed v, the two move off together with speed v/6. What was the angle between their initial directions? if this is the equation 2mvcos(theta)=2mv/6 what numbers
asked by Haley 
Physics please help!!
Water is flowing in a straight horizontal pipe of variable cross section. Where the crosssectional area of the pipe is 3.50·102 m2, the pressure is 5.30·105 Pa and the velocity is 0.310 m/s. In a constricted region where the area is 12.90·104 m2,
asked by Megan 
reading
what does the simile as red as a turkey gobblers wattle mean
asked by Anonymous 
geometry
given constant perimeter (people),Irene made a rectangle with an area (tables) of 196 sq. units. she finds that this is the largest area (greatest number of tables) possible for the given perimeter. Irene drew a rectangle with an area of 196 sq. units. she
asked by lily 
physics
if electron are caused to fall through a potential difference of 100000 voltage , determine their final speed if they were initially at rest.
asked by chandankumar 
Statistics
Twenty people are to be seated at 3 Circular restaurant tables that seat 8,7, and 5 people respectively. Determine the number of ways that this can be done. Express your answer in scientific notation to two decimal place.
asked by Matt 
English Figurative Language
What type of figurative language is the following sentence? : Oh, never, if I live to a million, Shall I feel such a terrible pain.
asked by Michelle 
Algrebra
How do you insert grouping symbols to make this equation true? 14 divided by (5+2) +8=10 14/7=2+8=10 Please confirm, I really have an issue with Algebra
asked by Jeannie 
physical science
What happens to the gravitational force between two objects if their separation is doubled? The force of attraction is doubled. the same. half as much. one fourth as much.
asked by Holly 
Chemistry
A camping lantern uses the reaction of calcium carbide, CaC2(s),and water to produce acetylene gas, C2H2(g), and calcium hydroxide, Ca(OH)2(s). How many grams of water are required to produce 1.55 moles of acetylene gas?
asked by franci 
math
2 trains leave the same train station at the same time, one train travels northeast at 50 mph, the other train travels due west at 40 mph, how far apart are the trains after two hours
asked by Michael 
math
what is probability of getting a multiple f 3 on the spinner
asked by Anonymous 
physicals science
A 2.9kg pile of aluminum ( = 2.70 g/cm3) cans is melted, and then cooled into a solid cube. What is the volume of the cube?
asked by Holly 
physics help
An rectangular aboveground swimming pool is 9 m long and 4 m wide. The pool wall has a constant height of 3 m above the ground. Take atmospheric pressure to be 1 atm = 10^5 Pa and g = 10 m/s2. (a) Calculate the weight of the air that fills the pool when
asked by sam 
Economics
why is it appropriate for the government to encourage private firms to build new roads.
asked by Anique 
chemistry
a balloonist is preparing a trip in a helium balloon. the trip begins in early morning at a temp of 15 degrees Celcius. By mid afternoon, the temp has increased to 30 degrees C. assuming the pressure remains constant at 1.00 atm, for each mole of helium,
asked by Joan 
physics
ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?
asked by Anonymous 
Physics
A metal sphere has a net negative charge of 11 x 10^6 coulomb. Approximately how many more electrons than protons are on the sphere?
asked by Dom 
chemistry
would the measure absorbance id an FENCS+ ion solution be higher, lower, or unaffected if there were fingerprints on the cuvette? briefly explain.
asked by christie 
Chemistry
Calculate the number of moles in these quantities. 1. 25.0 g KNO3 2. 5.4 x 102 g (NH4)2C2O4
asked by Netta 
Math
On July 15,2009, the Nixon Car Company purchased 1,000 tires from the Harwell Company for $50 each. The terms for the sale were 2/10, n/30. Nixon uses a periodic inventory system and the net method of accounting for purchase discounts. 1. prepare the
asked by Bobbi Loffredo 
English
I'm having trouble writing an introduction to this literary analysis. It's for "A Very Old Man with Enormous Wings". I'm supposed to show how the elements point of view, character, setting, tone and style, and symbolism convey the authors themes or central
asked by Emily 
chemistry
How many grams of oxygen gas are required to react completely with 14.6 g of solid sodium to form sodium oxide, Na2O(s)?
asked by franci 
chemistry
How many grams of solid copper must react with silver nitrate, AgNO3(aq), to produce 5.5 g of solid silver and copper(II) nitrate, Cu(NO3)s(aq)?
asked by franci 
Lit
The reasons Mcbeth fels he should not kill Duncan?
asked by curt 
health,safety,nutrition training for early childho
what are some considerations for the development of welldefined health,safety and nutrition practices for an early learning environment
asked by mary 
physics
another question: the 20 kg block is at the top of a 10 m long inclined plane. The block starts from rest and slides without friction down the length of the incline. The block is 5 m high. 1) Determine the gravitational potential energy of the block at the
asked by Nabil 
chemistry
The activation energy for the reaction in which CO2 decomposes to CO and a free radical oxygen atom, O, has activation energy of 460 kJ mol^2. The frequency factor is 2 x 1011 s^1. What is the rate constant for this reaction at 298 K?
asked by Massiel 
physics
A staging that weighs Wstaging supports a painter weighing 560 N. The reading on the left scale is 610 N and the reading on the right scale is 460 N. What is the weight of the staging? Answer in units of N.
asked by maria 
physics
An rectangular aboveground swimming pool is 9 m long and 4 m wide. The pool wall has a constant height of 3 m above the ground. Take atmospheric pressure to be 1 atm = 105 Pa and g = 10 m/s2. (a) Calculate the weight of the air that fills the pool when
asked by kelly 
physics
A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?
asked by maria 
chemistry
What happens when you have a mixture of CO2 hydrate and methane hydrate when the temperature is 2.5 C and the pressure is 2 MPa. Does the methane come off and the CO2 hydrate remain
asked by Wale 
chem
consider the equation for the following questions 2C2H6(g) + 7o2(g) 4 CO2(g) +6H2O(g) How many grams of CO2 are produced when 2.00moles of C2H6 react with sufficient oxygen?
asked by monica 
chemistry
Free radicals are also important in many environmentally significant reactions. For example, photochemical smog, which forms as a result of the action of sunlight on air pollutants, is formed in part by the following two steps. X NO2 NO O O O2 O3 UV
asked by Kat 
physics
A negatively charged balloon has 4.6 μC of charge. How many excess electrons are on this bal loon? Answer in units of electrons.
asked by maria 
psy 325
16) A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large or small meal. After eating the meal, their hearing was tested. The hearing ability scores (high
asked by Anonymous 
chemistry
Why should the volume of standard base (or acid) needed to reach the equilvalence point in a titration be more than 10.0 mL?
asked by redgy 
chemisty
4. N2+3H22Nh3 k=1.2 at a T=375C you initially have 0.249mol of N2. 3.21*10^2mol of H2, and 6.42*10^4 mol of NH3 in a 3.5L container a.what is the equation to determine the reaction quotient, Q b.determine the reaction quotient Q c. compare Q and K.
asked by shanice 
Chemistry (Acids and Bases)
The natural pH of rainwater is 5.6. The acidity of rainwater is caused by the dissolution of (TRUE OR FALSE) boric acid sulfuric acid carbonic acid calcium carbonate calcium oxide nitric acid
asked by Andy 
physics
A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s
asked by Anonymous 
physics
another question: the 20 kg block is at the top of a 10 m long inclined plane. The block starts from rest and slides without friction down the length of the incline. The block is 5 m high. 1) Determine the gravitational potential energy of the block at the
asked by Nabil 
physics
in a shuffleboard game, the puck slides a total of 12 m before coming to rest. if the coefficient of friction is 0.21, what was the initial speed?
asked by Harmi 
physics
a)A dielectric in the shape of a thickwalled cylinder of outer radius R1 = 5.15 cm, inner radius R2 = 3.65 cm, thickness d = 3.95 mm, and dielectric constant κ = 3.87 is placed between the plates, coaxial with the plates, as shown in the figure.
asked by cevahir 
algebra
What is the maximum number of cubes measuring 5cm on an edge that can be obtained by cutting a solid cube that measures 1 m on an edge?
asked by joe 
geometry
A parallelogram has sides of length 3 and 5 and a diagonal length 10. is the quadrilateral a rectangle? please explain
asked by lily 
physics
Suppose the vertical loop has a radius of 8.92 m. What is the apparent weight (Wap) of a rider on the roller coaster at the bottom of the loop? (Assume that friction between roller coaster and rails can be neglected. Give your answer in terms of m and g.)
asked by HELP! 
separation of variables
is the answer to find an equation of the curve that satisfies dy/dx=4x^3y and whose yintercept is 7 y=7e^(x^4)
asked by jake 
algebra
Write the equation for this situation: During the month of February, the depth, d, of snow in inches at the base of one ski resort could be approximated by adding 7 to twice the number of days, t, since January 31st. Then graph the equation and use the
asked by Anonymous 
Physics
A car moves with a speed v on a horizontal circular highway turn of radius is R = 100. Assume the height of the car’s center of mass above the ground is h = 1 m, and the separation between its inner and outer wheels (car's width) is w = 2 m. The car does
asked by William 
Physics
Dr. Miller pulled a wooden crate at a constant accelerationof 1.23 meters per second per second with a forceof 752 newtons at an angle of 22 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor was 0.347. Find
asked by Brittney 
calculus
find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3
asked by linda 
mathematics trignometry
prove that the following are identity 1. (cotA+cosecA1)/(cotAcosecA+1)=cosecA+cotA 2. (sinAcosA+1)/(sinA+cosA1)= 1/(secAtanA)
asked by Anonymous 
Pre Calc Repost
I already asked this, but I didn't really understand the answer I got. I got the general idea, but I don't have a good enough understanding to answer the question. Writing to Learn: In a certain video game a cursor bounces back and forth horizontally
asked by Taylor 
physics
A harmonic wave is traveling along a rope. The oscillator that generates the wave com pletes 44.0 vibrations in 26.9 s. A given crest of the wave travels 359 cm along the rope in a time period of 11.6 s. What is the wavelength? Answer in units of m.
asked by maria 
English
Can you please check one more thing: 1)The students were delighted by /with their exam results. Are "by" and "with" possible? Is the meaning the same as "they are pleased, satisfied, content with? their exam result? 2) They are depressed, sad, happy,
asked by Mike 
physics
A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?
asked by zach 
physics
magine a straight line connecting the centers of the earth and the moon. At some point along this line the gravitational forces pulling a spacecraft towards the moon and towards the earth exactly balance each other, and the craft could just sit there in
asked by peter 
physics
A skier of mass 72 kg is pulled up a slope by a motordriven cable. (a) How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 2.7 m/s? (b) What power must a motor have to perform this task?
asked by Allie 
Chemistry
I have 5.0 ml of lead II NITRATE and mix it with 20.0 ml of Sodium Iodide. what is the formula of the precipitate
asked by Diana 
physicalscience
The volume of a sample of water is 20 cm3. The mass of this sample is closest to
asked by Holly 
acc. alg 2
exponentiating to solve equations: solve the eaquation, cheack for extraneous solutions log5(x+4)+log5(x+1)=2
asked by Kayla 
calculus
how do you solve the initial value problem by separation of variables dy/dx=x^2y^2, y(4)=4
asked by kimberly 
calculus
how do you solve the initial value problem by using separation of variables dy/dx=xy^2 when y(1)=0.25
asked by kimberly 
Physics
The linear absorption coefficient for 0.05 nm xrays in lead and in iron are respectively, 5.8x10(4) /m and 1.1x10 (4) /m. How thick should an iron shield be in order to provide the same protection from these xrays as 10 nm of lead?
asked by amy 
calculus
if dy/dt=3y and if y=1 when t=0, what is the value of t for which y=1/3?
asked by christine 
Chemistry
a redox reaction is a reaction in which 1.only reduction occurs 2.only oxidation occurs 3.reduction&oxidation occur at the same time 4.reduction occurs first and then oxidation occurs i think its 3 or 4.
asked by Alexis 
Chemistry
Zn(s)+Cu2+(aq)>Zn2+(aq)+Cu(s) which particles must be transferred from one reactant to the other reactant ? 1.ions 2.neutrons 3.protons 4.electrons 4?
asked by Alexis 
math
ms. sue u havent answered my question yet.
asked by Harlery 
Algebra
How do I solve 5*(3x+2)=75
asked by bobbie 
physics
A dielectric in the shape of a thickwalled cylinder of outer radius R1 = 5.15 cm, inner radius R2 = 3.65 cm, thickness d = 3.95 mm, and dielectric constant κ = 3.87 is placed between the plates, coaxial with the plates, as shown in the figure. Calculate
asked by cevahir 
chemistry
If 74.5 grams of a hot metal was added to 56.4 grams of water and the temperature of the water rose from 20.4 to 33.4 degrees, how many KJ of energy was lost by the hot metal? i need helping setting up where the numbers go. I'm lost
asked by katie 
chemistry
A+B  C deltaH=100kj and temp.=25C which direction would the reaction shift if.. a. the concentration of A was decreased b. the concentration of C was increased c. The temp. was increased to 100C
asked by shanice 
CHEMISTRY/
A student takes a 1.00 mL aliquout of 5.00*10^4 M HCl solution and dilutes it to the mark with water in a 1000.0 mL volumetric flask. (a)What is the expected pH for the final solution at 25C? (b)What would be the expected pH if this solution were later
asked by TORI 
physics
Do electrons go to the north pole or south pole?
asked by Anonymous 
Chemistry
A first order reaction has a rate constant of 0.0733 s−1. What is the half life for this reaction in seconds? when I plug in the numbers in the formula, my answer was 9.45. But on the computer it says the answer is wrong. How do I find the right answer?
asked by Alex 
Chemistry
The following rearrangement reaction is first order: C3H6 ¨ CH3CH=CH2 The rate constant for this reaction is 6.7 ~ 10−4. How many minutes will it take for the concentration of C3H6 to drop to 11.75% of its initial value? How do I calculate this step
asked by Alex 
statistics
It has been stated that income increases with the amount of education one receives. Recently I sampled some managers (technical, construction, sales, and manufacturing), compared their salaries to each other and asked the amount of education that had
asked by John 
calculus
solve the initial value problem by separation of variables dy/dx=xy^2, y(1)=0.25
asked by linda 
physics
A 20. kg block is placed at the top of a 10. meterlong inclined plane. The block starts from rest and slides without friction down the length of the incline. (A diagram shows a height of 5.0 m, the 10. m length of incline/hypotenuse and the 20. kg block
asked by Sejul 
Algebra
In 1993, the life expectancy of males in certain countires was 62.3. In 1999, it was 66.1 years. Let E repesent the life expectancy in year t and let t represent the number of years since 1993. The linear funtion that fits the data E(t) =
asked by V 
English
What is the theme of the book NUmber 8 by Anna Fienberg?
asked by Michelle 
trig
determine wheather each of the following is an identity or not prove it 1. cos^2a+sec^2a=2+sina 2. cot^2a+cosa=sin^2a
asked by Anonymous 
mathematics trignometry
if tanA=ntanX sinA=msinX then prove that cos^2A=(m^21)/(n^21)
asked by Anonymous 
math 6
What is the volume of trapezoid and area?
asked by sabrina 
calculus
The parametric curve x(t)=3cos(t) y(t)=7sin(2t) intersects itself at a point P=(x0,y0) where x0= y0= The slopes of the 2 tangents at this point are? THANK YOU!
asked by leon 
Chemistry
In the reaction: Cu(s) + 2 Ag+(aq) > Cu2+(aq) + 2 Ag(s) 1.Cu 2.Cu2+ 3.Ag+ 4.Ag i know its Ag but is it Ag+ or just Ag? what does that extra plus mean?
asked by Alexis 
calculus
locate all critical points sqrt(584x^2+32x) thanks for any help!
asked by skyflow3r 
Algebra 2
i actually have two questions.  the edge of one cube is 4 m shorter than the edge of a second cube. the volumes of the two cubes differ by 1216m^3. find the edge of the smaller cube.  the sum of the squares of the two larger of three consecutive even
asked by Ana 
math
Write the equation for the following situation: In one U.S. town, the annual consumption, b, of beef (in kg per person) can be estimated by adding 20 to half the years, t, since 1975. Then graph the equation and use the graph to determine the beef
asked by Anonymous 
MATH
Hello! I am trying to finish a math assignment. it was a bunch of math questions, and I am having a very difficult time with 5 of them. I have the answers to them though. Could somebody please help me with AT LEAST a few!? thanks!! 1) A square swimming
asked by Josh 
Math
Mr. Thatch needs to buy tables and chairs for his office suite. Tables cost $90 and chairs cost $40. Mr. Thatch can spend no more than $1,000. a. Write an inequality that expresses this situation in terms of the number of tables(t) purchased and the number
asked by Harlery 
Chemistry
In the reaction: Cu(s) + 2 Ag+(aq) > Cu2+(aq) + 2 Ag(s, the oxidizing agent is ? 1.Cu 2.Cu2+ 3.Ag+ 4.Ag i know its Ag but is it Ag+ or just Ag? what does that extra plus mean?
asked by Alexis 
Programming Logic and Design
A program that accepts a plant's name, price, and the plant's light and soil preferences.
asked by sam 
reading
what is the meaning of as red as a turkey gobblers wattle
asked by Anonymous 
business report
explain how internal and external influences may impact on business opportunities in NSW.
asked by john 
math
you have $60, consisting of quarters and pennies. write an inequality that shows the different number of coins in piggy bank
asked by cynthia 
Programming Logic
I need to create a program that has (at least) two variables, char and num. I need to use nested loops to print char, a character, in the form of the following pattern on as many lines and as many times as specified by num. For example, if char is “M”
asked by Kwadwo 
science
a)A dielectric in the shape of a thickwalled cylinder of outer radius R1 = 5.15 cm, inner radius R2 = 3.65 cm, thickness d = 3.95 mm, and dielectric constant κ = 3.87 is placed between the plates, coaxial with the plates, as shown in the figure.
asked by cevahir 
physics
I need to sketch a graph of the gravitational potential energy (y axis) of a block as a function of its kinetic energy (x axis). The block is at the top of an inclined plane. It starts from rest and slides without friction down the length of the incline. I
asked by Nabil 
Chemistry
How many grams of lithium will combine with 29.1 g of sulfur to form the compound Li2S?
asked by Max 
Landuage Arts
Can you give me a 40 minute lesson plan on themes, patterns and symbols found in literature from different era and cultures? The students need to apply knowledge of connotation and denotation to determine the meaning of words. Also to identify an author's
asked by Jewell 
chemistry
calculate final volume required to reach 1% solution when 0.2g of sample is predigested with nitric acid 3mL then after 1day, if 1ml sample from this solution is digested in 10ml solution and diluted in 50 mL distilled water.
asked by tomas 
business report
i need help to write a business report using key terms (explain how internal and external influences may impact on business opportunities in NSW). explain: relate cause and effect; make the relationships betwwen things evident; explain why and/or how.
asked by john 
English
1) I need to find a good site explaining the period between the two World Wars and after (with reference to the Irish question, the Suffragettes' Movement , the New Deal, the Walfare State, and the Swinging 1960s) on a blackboard. Actually, this kind of
asked by Mike 
algebra (parabolas)
find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. 1. y=xsquared+9 2. y=2xsquared=7x21
asked by Bri 
Mathematics
A landscape architect wants to maximise the area of a herbal garden. The fence around the perimeter of the area must be 60 metres long. The optimal width of the rectangular area is ?
asked by Natascha 
Mathematics
A landscape architect wants to maximise the area of a herbal garden. The fence around the perimeter of the area must be 60 metres long. The optimal width of the rectangular area is ?
asked by Natascha 
statistics
There are 4 small franchise Quick Food Stops in the Columbus area. Numbers of burgers sold on a daily basis was recently studied. There were 6 2month periods studied. At the 0.05 level of significance determine of there is any difference in the average
asked by John 
physics
A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s
asked by HARD!!!! 
Calculus
I need help with finding first and second derivativesimplify your answer. Y=xtan(x) I solved first derivative xsec^2(x) + tan(x) I don't understand how to get the first...can someone show me the steps with explanation?
asked by Janet 
physics
You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift
asked by HELP! 
math
A point moves along the xaxis, and its xcoordinate after t sec is x = 4t + 16. (Assume that x is in centimeters.) (a) What is the velocity? in cm/sec
asked by sakina 
Math
What is the difference between a linear and a quadratic model? How do I know which one is good for the graph? :S I know it has to do with equations to find R2
asked by Jacob 
physics
A ball is dropped from 1.5m and bounces back up 1.2m. How many times will the ball bounce before it loses 90% of its energy? I figued since the ball bouced .8 times the original hight and 10% of 1.5m is .15m that that when the bounce hight reached.15m that
asked by Mark 
calculus
Locate all critical points ( both types ) of f(x)=sqrt(584x^2+32x) Thanks
asked by skyflow3r 
separation of variables
solve the value problem by separation of variables dy/dx=x^2/y when y=5 and x=3
asked by jake 
social studies
what facts are there on point of view on tariffs on imported goods
asked by michelle 
Physics
The game is called Ice Bocci. You play by sliding pucks across the ice into each other, sort of like marbles. One player slides the red puck straight into a stationary green puck. The red puck is sliding with a speed of 4 m/s and weighs twice as much as
asked by Paige 
chemistry
Lab on Determination of copper in brass. I have mass of brass at .1011g. My concentration of diluted solution's unknown is .0037957, My concentration of mg/ml Cu^2+ unknown is 241.2. My professor is asking me to determine the percent of copper. I know that
asked by Tam 
physics
Your spacecraft is in a circular, geostationary orbit around earth and you would like to fly to the moon. Draw a suitable Hohmann transfer orbit that will get you there. How long does the journey take? (Neglect the gravitational fields of the moon and the
asked by ronny 
algebra
Three points of a 5x5 square array are connected. How many square units are in the area of the largest possible triangle that can be formed?
asked by jason 
algebra
You have just graduated from college and landed your first big job. You have always dreamed of being a homeowner, and after carefully shopping for your dream home, you find one that you would like to purchase at a cost of $250,000. After researching banks
asked by Anonymous 
Algebra 2
how do i find out what the amplitude, period, h, k and midline of problems 1) y= sin (x5)=7 2) y=3 cos (x pie) 1 3) y= Sin3x+4 4) y= 1/2 cos 2x2
asked by Kelsey 
Loop of Henle
What would happen to the concentration gradient in the tissues in the thick ascending limb loop of Henle if you used loop diuretics for too long? I know that if you use them K+ isnt being recycles and therefore theres no electropositive gradient being
asked by Lena 
reading
what does flew out of gear like a ModelT Ford mean
asked by Anonymous 
algebra (parabolas)
find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. y=3*xsquared+6x2
asked by Bri 
early childhood ed
a childs observation of a parent writing a grocery list, his recognition of the coca cola logo, and his leafing through mailbox advertising literature exemplify. answers 1. cultural imprints 2. autonomous language 3. literacy events 4. mastery of
asked by tim 
statistics
myself and 2 friends are a part of a group of 15 jurors. If 3 people are to be chosen, what is the probability that myself and my 2 friends are the last 3 people chosen?
asked by fran 
To KK
I have removed all your posts (English and English 2) from overnight because of the incredibly objectionable content. Currently, you are also blocked from posting anything. If your posting privileges are restored, please make sure you do not post any type
asked by Writeacher 
austin community college
how many outcomes are there in an experiment consisting of rolling three dice followed by tossing a coinonce?
asked by angie 
calculus
how do you separate this variable dy/dx=(x^2)/y given y=5 and x=3
asked by linda 
calculus
how do you separate this variable dy/dx=(x+1)/xy, x>0, y(1)=4
asked by linda 
mathematics trignometry
if sina, cosa, tana are in geometric progression then prove that cot^6acot^2a=1
asked by Anonymous 
math
I am having trouble with decimals. If i add 8+3+0.9+0.31=51 am i correct
asked by Americal 
Chemistry
all redox reactions involve 1.the gain of electrons only 2.the loss of electrons only 3.both the gain and the loss of electrons 4.neither the gain nor the loss of electrons 3, right?
asked by Alexis 
Algebra
First, I really stink @ Algebra. How do combination of signed numbers work? I keeping getting 6 but for some reason I don't think its right. 1(6+1) 16+1 5+1=6
asked by Jeannie 
Accounting writen report
Why is it important for a business to prepare a monthly bank reconillation statement? state two points (b)what should the internal auditor do about this? Name two points
asked by Nelisiwe jili 
chemistry
FeCI3(aq)t koh(aq) fe(oh)3(s) t kci(aq)
asked by haj 
Psychology220
Write a 350 to 700word response summarizing the three dimensions of love and how they interrelate to identify a specific type of love relationship. I have the fist part done but I am not really sure how to go about writing how they interrelate to
asked by Shay 
Physics
Two girls are at the same point on one side of a river that is 40m wide with a current flowing at 1.00m/s. Simultaneously, the dive into the water in an attempt to swim to the other bank of the river directly across from where they started. Both swim at
asked by Mary 
calculus
Complete the identity. sec(x)sin(x)/tan(x)  1 = 0
asked by Andrew 
MATH
Hello! I am trying to finish a math assignment. it was a bunch of math questions, and I am having a very difficult time with 5 of them. I have the answers to them though. Could somebody please help me with AT LEAST a few!? thanks!! 1) A square swimming
asked by Josh 
History Question
Which Constitutional Amendment is most important to you and why?
asked by RaeAnne 
Math
Hi i was wondering what a rational number between 1.01001000100001 and 1.011011011011 would be. There are too many 1's that are confusing me haha. Thank you!
asked by Jon 
social studies
how did ancient texts and statues affect renaissance scholars?
asked by Anonymous 
Math
Mr. Thatch needs to buy tables and chairs for his office suite. Tables cost $90 and chairs cost $40. Mr. Thatch can spend no more than $1,000. a. Write an inequality that expresses this situation in terms of the number of tables(t) purchased and the number
asked by Harlery 
Chemistry
A certain shade of blue had a frequency of 1.01*10^4 Hz. What is the energy of exactly one photon of this light?
asked by bert 
calculus
find the derivative of f(x)=x^2sec^2(3x) also with g(x)=sqrt(cosxsecx) i get zero because cos and sec cancel each other out and derivative of a constant is zero... am i doing something wrong?
asked by anonymous 
chemistry lab
if you find salicylic acid or acetic anhydride in your aspirin synthesis product why are they there? Where did they come from?
asked by annonymous 
calculus
is the answer to find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3 is y=2x^21
asked by christine 
Database Design (SQL)
I ned help creating a query that shows the number of days left before the end of the term. I need the following functions to accomplish this: CONCAT, DAYOFYEAR, NOW. So far I have this for my query: SELECT CONCAT('There are ',DAYOFYEAR(NOW()),'
asked by Kojo 
English
I have to write a story in the perspective of a 2 year old and I need a plot for the story. Any suggestions?
asked by Kayla 
Programming Logic
I need help creating a program to compare the value in input[0] with the value in input[1]. For example, if input[0] is less than input[1] print ‘input[0] is less than input[1]’; otherwise, print ‘input[0] is not less than input[1]’.
asked by Kwadwo 
Programming Logic
I need help creating a program to display the integers from input[0] through input[1]. That is, if input[0] contains 4 and input[1] contains 8, the display 4,5,6,7,8 (on separate lines).
asked by Kwadwo 
chemistry
John has three bottle of mineral acid but does not know which is which since he did not label the bottles before filling them. Suggest a method to which could be used to identify the acids.
asked by Angel 
physics
a very thin piece of copper wire has an electrical resistance of 20,000 Ohms. You connect its ends to a regular 2.0 Volt battery. How much power does it draw? Let's assume that this little piece of wire initially contained one trillion (that's a one with
asked by jen 
physics
Muons are elementary particles that have a very short lifetime of about two millionth of a second (when at rest). They can be created in the upper atmosphere (at an altitude of say 10,000 meters) by cosmic rays, in which case they travel towards the
asked by roxy 
Chemistry
In a mixture of liquids,liquid A is steam volatile,and decomposes at its boiling point.explain the method of separating liquid A from the mixture,with physical principles involved.
asked by Ramya 
chemistry
What are the main contaminants likely to be in your soap?
asked by Sam 
math
If there is a bench at first and every fourth sign after that.there is water at seconed sign and fifth after that. at which sign can i find both bench and water. my answer is i subtract 41=3 and i subtract52=3 i added 3+3=6,so ami correct to say that
asked by Keisha 
Physics
Two cars crash into each other at an intersection on a very icy road. One 3,000 lb car is traveling 45 mph NW. The other, weighing 2,000 lb, is traveling 30 mph E. After the collision, their bumpers lock together. What is the velocity of the wreck as it
asked by P. 
physics
Two pool balls of equall mass have a perfectly elastic headon collision.The fist ball is traveling at 2m/s and the second at 3m/s in the opposite direction.what are thier speeds immediately after impact? I'm lost on what equation to use here. Does the
asked by Mark 
reading
What is the meaning of the simile flew out of gear like a ModelT Ford
asked by Anonymous 
algebra (parabolas)
tell whether the graph opens upward or downward. then find the axis of symmetry and vertex of the graph of the function 1. y=xsquared5 2. y=2*xsquared+6x+7
asked by Bri 
Accounting
What should the internal auditor do this? Name two point
asked by Nelisiwe 
science
why is it so important to have only one set of chemical symbols in the world?
asked by joe 
Business Law 310
Week 3: Torts and Contract Law  You Decide Help Print This Page Scenario Scenario Summary The song “Happy Birthday to You” has universal appeal. Almost everyone knows its lyrics and melody, and it is sung to millions of people on a daily basis.
asked by Lulu 
chemistry
What raw materials are used to make lithium ion batteries? How are the raw materials used in the batteries processed? What chemical equations take place in the battery?
asked by george 
calculus
if dy/dx=ycos x and y=3 when x=0, then y= ?
asked by linda 
physics
A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s
asked by laila 
statistics
I am raising guaramies and using different temperatures in 3 tanks to optimize breeding. Figure out at the 0.05 alpha if the breeds (treatments) are varying in production and determine at the same alpha if the temperature in the tanks (blocks ) are
asked by John 
statistics
In the City of Cleveland appraisals for taxes purposes is conducted every 4 years. The county assessor believed there was variance in the different people that were sent to perform the assessments. A test was developed to determine if there was difference
asked by John 
physics
A 9.000 kg ball has a speed of 16.0 m/s. What is its kinetic energy?
asked by Anonymous 
calculus
solve the initial value problem by separation of variables dy/dx=x^2y^2, y(4)=4
asked by linda 
trig
if sina,cosa,tana are in geometric progression then prove that cot^6acot^2a=1
asked by Anonymous 
History
Does any know how the American public felt about what happen to the Japanese American internment issues. I know how the American Japanese felt however I cannot find any express opinions of the American public.
asked by David 
algebra 116
the solution set for 92464
asked by kisha 
math
DRAW a line l construct a line p such that lparallel ro p is at a distance of 3.5cm from l
asked by pooja 
Science
Need help with constructing a model of radioactive decay with popcorn kernals
asked by Kim 
English
Is it all right to say "he was anxious for me, but about my health? Thank you
asked by Mike 
Ancient World History
What is Daoism and confucius?
asked by ricki 
algebra
how do i solve. 3y6+y+44=7y+405y
asked by steve 
math
Decide whether the pair of lines is parallel, perpendicular or neither: 2x+3y=3 2x+3y=10
asked by Ellie 
Algrebra 1
x2(squared)12=x solve by completing the square
asked by Sandra 
English
Another quick question... "A Very Old Man with Enormous Wings" seems to be told in a thirdperson omniscient narrative, because we know the thoughts and feelings of all of the characters, with the EXCEPTION of the old man...is this still considered
asked by Emily 
chemistry
Why would you find ethanol or water during an aspirin lab?
asked by annonymous 
chemistry
Why would you find ethanol or water during an aspirin lab?
asked by annonymous 
Physics
Two equal mass cars collide head to tail and their bumpers lock. One car has a velocity of 10 m/s and the other is at rest. What is the velocity of the two cars after the collision?
asked by Rodney 
Math
7/11 as a percent
asked by jenny 
Civics
The Governor can ___ and appoint state officers (article III) (North Carolina Contitution)
asked by Sam 
Chem
What is the percent by mass of a solution if 45 grams of acetic acid is added to 90 g of H2O? Thanks.
asked by Jenny 
chemistry lab
what contaminant will be the one that most affects the pH of soap?
asked by annonymous 
DOSAGE FORMS AND ROUTES OF ADMINISTRATION
On a job interview for a position as a pharmacy technician, the interviewer asks you what a dosage form of medication is. You respond that a dosage form is
asked by bernard 
Math157
I am having problems finding the correct way to solve this problem. I don't know the formula or even how to set it up. "Sam brought one of 250 tickets selling for $2 in a game with a grand prize of $400. Was $2 a fair price to pay for a ticket to play this
asked by Shea 
English
Thank you very much for helping me! Your information was really of help can you say that?) Here is a paragraph I wrote on Dulce et Decorum Est by Owen. I know it is incomplete. I also need to find more data on the "War poets" and on this poem, too. Can you
asked by Mike 
physical science
what is the wave length
asked by reisom 
math
what is the prime factorization of 670 wrtten in exponent form
asked by anonymous 
english
How to write an essay topic is based on the 2010 fifa world cup in s.a
asked by Nelisiwe 
Algebra
Of what percent of 320 is 180?
asked by alex 
health science
hey can you please help me with this ?? what are the similarities and differences between mainstream and complementary health care practitioners? :)
asked by paula 
ECONOMICS
What are three benefits for the economy of government's building and maintaining roads?
asked by Capone 
physics
5.15 g bullet at 886. m/s
asked by Anonymous 
algebra2
f(x)=3(x+18)(x8)
asked by angel 
MATHS
WHAT IS THE UNKNOWN LENGTH OF A TRIANGLE IF A=X+2,B=X+1,C=13
asked by STACIA 
language and art
To travel to France from Egypt, you have to pass through which countries?
asked by Mdrou 
sydney
how would you solve this problem cos(theta)/2=1/6
asked by math 
physical scien ce
what is the wave length
asked by reisom 
Maths
Evaluate: f(x)=2x+1 (a) f(1) (b) f(2) (c) f(1/2) (d) f(a+b)
asked by Ashily 
Ancient World History
why is zoroaster the basis for modern religion?
asked by ricki 
Ancient World History
HOW DID THE GROWTH OF CITIES LEAD TO FORMATION OF GOVERNMENT? AND WHAT IS THE STONE AGE?
asked by ricki 
Human service
what is social contructionist perspective?
asked by Reed 
US History
Was Eisenhower right to request that Great Britian, France, and Israel end their attack on Egypt during the Suez crisis?
asked by Abby B. 
chem
what temperature must be maintained in insure that a 1.00 L flask containing 0.04 moles of oxygen will show a continuous pressure of 745 mm Hg?
asked by Gabby 
math
How do standards improve mathematics instruction
asked by Anonymous 
math
Determine the points on the curve y=x^2(x^3x)^2 where the tangent line is horizontal. Thx!
asked by hast 
Programming Logic and Design
A program that accepts a plant's data and displays the results for a plant if it is appropriate for a shady or partially sunny yard with clay soil.
asked by sam 
AU
What is probablity of 62 and probability of 59 with Mean of 60 and SD of 7
asked by Sheri 
math: precal
How do I find the zeros of a polynomial function?
asked by leena 
English
I visited the site you recommended to me. I just have a few mor doubts. I included a few more sentences whose vocabulary I'm not sure of. 1) The teacher was annoyed/cross with me for being late BUT she was annoyed/irritated by the heat/the elephant. 2) I
asked by Mike 
Database Design (SQL)
Hi I need help creating an SQL query to display each faculty member's last name, comma, first name as a CONCATenated element, then their salary as CONCATenated element with a dollar sign and comma. Then, the boss's last name, comma, first name as a
asked by Kojo 
English
1) I find it difficult to describe activities people normally do when working on the computer (on "Microsoft Word", for example). Can you help me? (For example: I switch on the computer, then I click on the icon "word" and wait for it to open. I type in my
asked by Mike 
math
how do you divide 2.50 among 300 people
asked by Keisha 
grammar
is it in my care or to my care
asked by anheo11111 
Math
Hi do the following sets have the same cardinality, why or why not? N= 1,2,3,4,5,6,7... N2= blank, blank, 3,4,5,6,7... So basically the numbers from 3 to 7 match up in both sets, but in N2 the first two are empty. I think they have the same cardinality
asked by Jake 
alg I
Yellow, green, and red chips are placed in a bag. The odds against pulling a green chip are 2/5. What is the probability of pulling a green chip?
asked by jane 
calculus
if dy/dx=3y and if y=1 when t=0, what is the value of t for which y=1/3
asked by linda 
mythology
identify a scholarly article that discusses some aspect of the female divine in contemporary culture
asked by Tammy 
Health
What is the difference between low and high blood pressure?
asked by Joe Schmo 
English
Thank you. I just want to know if "She was anxiuous for me" is grammatically correct.
asked by Mike 
math
I have the numbers 6,9,13,15,22,38,and46 the mode is 13 am i correct
asked by Americal 
math
determine f'(2) for f(x)=g[h(x)] given g(2)=5, g'(2)=3, g'(6)=3, h(2)=6, h'(2)=4
asked by jim 
Science
Jim has an aqarium that holds 4,000 mL of water. It is at the room's temerature of 20 degrees Celsius. How many calories need to be transferred to the water for it to reach 25 degrees Celsius?
asked by Lindsy 
science
How does a kiwi bird care for its young?
asked by mia 
english (for Sra) repost
The Lady of Shalott I have two events and have to find the quotation. 1st event The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. 2nd event The Lady floats
asked by george 
FORAGERS,FARMERS,AND BUILDERS
Earthquake activity didn't play a role in the collapse of _______ civilization. A. Mycenaean B. Minoan C. Egyptian D. Harappan
asked by Anonymous