Questions Asked on
March 28, 2010

math(advanced algebra&trigonometry)
If θ is an angle in standard position and its terminal side passes through the point (−3,2), find the exact value of cscθ . I know the answer...but i want to know how you get the answer... The answer is radical 13/2
asked by Rony 
Chemistry
When 84.8 g of iron(III) oxide reacts with an excess of carbon monoxide, iron is produced. Fe2O3(s) + 3CO(g) ==> 2Fe(s) + 3CO2(g) what is the theoretical yield of iron?
asked by Kim 
Chemistry
The equation below shows the incomplete combustion of ethene. C2H4(g) + 2O2(g) ==> 2CO(g) + 2H2O(g) If 2.70 mol C2H4 is reacted with 6.30 mol O2, a) identify the limiting reagent. b) calculate the moles of water produced. Show all steps.
asked by Keith 
chemistry
In clinical lab reports, some concentrations are given in mg/dL. Convert a Ca2+ concentration of 3.5 mg/dL to weight/volume percent.
asked by Jen 
Chemistry
If 50.0 g of silicon dioxide is heated with an excess of carbon, 27.9g of silicon carbide is produced. SiO2(s) + 3C(s) > SiC(s) + 2CO(g) what is the percent yield of this reaction?
asked by Kim 
physics
A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What
asked by sara 
trig
solve the equation 2sin^2X  3sinX= 1
asked by sol 
physics
A ball is dropped from a height of 20m and rebounds with a velocity which is 3/4 of the velocity with which it hit the ground. What is the time interval between the first and second bounces?
asked by Edwin 
chem
classify each of the following as a lewis acid or base: Cl BeCl2 B(CH3)3 P(Ch3)3 Cl is an acid right? i'm not sure i understand this concept very well. :[ and i tried looking at my notes already.
asked by Katie 
Chemistry
Gallium65, a radioactive isotope of gallium, decays by first orderkinetics. The halflife of this isotope is 15.2 min. How long would it take for 7/8 of a sample of this isotope to decay? 15.2 min 30.4 min 45.6 min 48.0 min I'm not sure how to do this. I
asked by Val 
PreCalculus
A piece of plexiglass is in the shape of a semicircle with radius 2m. Determine the dimensions of the rectangle with the greatest area that can be cut from the piece of plexiglass?
asked by Erin 
general science
A compound containing 3 atom of carbon and 8 atoms of hydrogen is combined in a reaction wih oxygen molecules. The two end products of this equation are carbon dioxide (CO2)and water. What element should you look at first in balancing this equation?
asked by jessica 
Math
what are the steps on how to balance Al + O2 > Al2O3
asked by Anna 
College Chem
If equal masses of O2 and N2 are placed in identical containers at the same temperature, which of the following statements is (are) true? a. both flasks contain the same number of molefules b. the pressure in the N2 flask is greater than in the other
asked by Donna 
physics
A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre
asked by Edwin 
chemistry
Calculate the molar heat of neutralization in kJ/mol of the reaction between HA and BOH given the following information: The temperature change equals 7C, 50 mL of 1 M concentration of Acid 50 mL of 1 M concentration of Base Heat capacity of the
asked by Aaron 
physics
a projectile is fired in the earth's gravitational field with a horizontal velocity of v=9.00 m/s. How far does it go in the horizontal direction in 0.550 seconds?
asked by sam 
Chemistry
Calculate the enthalpy change for the following equation: NO(g)+ 1/2O2(g) > NO2(g) I have no clue how to do this. I just know the answer is supposed to be approximately 57.2 kJ. Can some explain to me what to do?
asked by Ana 
algebra
2 pairs of shoes, 5 pairs of pants, and 6 shirts on a trip. Assuming all items are compatible, how many different outfits can be worn?
asked by john 
physics
Physics force of friction question a shuffle board disk is accelerated to a speed of 5.8m/s and released. if the coefficient of the kinetic friction between the disk and the concrete court is 0.3, how far does the disk go before it comes to a stop?The
asked by jake 
chemistry
A particular household ammonia solution (d = 0.97 g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.50?
asked by anonymous 
Chem
Aspirin (acetylsalicylic acid, ) is a weak monoprotic acid. To determine its aciddissociation constant, a student dissolved 2.00 g of aspirin in 0.600 L of water and measured the pH . What was the Ka value calculated by the student if the of the pH of the
asked by Katie 
Physical Science
11. Chromium is produced by reacting its oxide with aluminum. If 76g of Cr2O3 and 27g of Al completely react to form 51g of Al2O3, how many grams of Cr are formed?
asked by Zak 
Chemistry
4. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl. 5. Using the equation in problem 4 if 6.00 g of CH4 are mixed with 6.00 g of CL2, how much HCl can be made? What is the percent yield if 2.5 g are recovered from the reaction in the lab?
asked by Kathleen 
Calculus
Find constants a,b, and c such that the function f(x)=ax^3+bx^2+c will have a local extremum at (2,11)and a point of inflection at (1,5). Sketch the graph of y=f(x). How would I solve this. Thank you.
asked by Wayne 
chemistry
The maximum concentration set by the U.S. Environmental Protection Agency for lead in drinking water is 15 ppb. What is this concentration in milligrams per liter? How many liters of water contaminated at this maximum level must you drink to consume 1.0 ug
asked by Hannah 
SCIENCE: GR.10 OPTICS CONVEX MIRRORS
A convex security mirror has a focal length of 0.25m. A person with a height of 1.5m is 4m from the mirror. calculate the image distance and image height. AND An object 0.4m tall is placed 2.5m in front of a convex mirror that has a focal length of 90cm.
asked by lily 
Science, Physics
The Pith balls may be positive, negative or neutral. Four pith balls are suspended by insulated threads. The following reaction occurs. a) #2 pith ball is positively charged b) #2 attracts all the other pith balls,. c) #1 and#3 pith balls repel each other.
asked by Sagal 
Precalculus(NEED HELP ASAP PLEASE!!)
cot(theta)= 3 pi < theta < 3pi/2 Find: sin(theta)= 1 ? cos(theta)= 3 ? tan(theta)= 1/3 ? sec(theta)= 1/3 ? csc(theta)= 1 ? That's what I came up with, but they are not correct, PLEASE help me where I went wrong!!
asked by jh 
chemistry
Choose all of the following statements about the equilibrium constant K that are true: (a) If the K value for a reaction is > 1 then Go must be negative for this reaction (b) A large value for K implies there is a strong driver for the reaction to proceed
asked by James 
Science
Determine your distance traveled and displacement if you walk 100m forward and then 35m backward
asked by Marly 
PreCalc (exponential growth)
A COLONY OF BACTERIA IS GROWN UNDER IDEAL CONDITIONS IN A LAB SO THAT THE POPULATION INCREASES EXPONENTIALLY WITH TIME. At the end of the three hours, there are 10,000 bacteria. At the end of the 5 hours, there are 40,000 bacteria. How many bacteria were
asked by Phillip 
math
wich is not a prime number 11 21 31 41
asked by ikd 
geometry
2 complementary angles are in the ratio of 5:13. Find the measure of each angle?
asked by kim 
Physics
Thank you for any help and assistance. Here is the question/problem: Because of the pressure inside a popcorn kernel, water does not vaporize at 100 degrees Celsius. Instead, it stays liquid until its temperature is about 175 degrees Celsius, at which
asked by Demi 
sci...
what is trace fossil
asked by pavleen 
chem
What volume of 0.200 M Fe(NO3)3 is needed to make 50ml of o.oo200M Fe(NO3)3?
asked by amber 
chemistry
1.) What must be the molarity of an aqueous solution of trimethylamine (CH3)3N if it has a Ph of 11.04? Kb = 6.3*10^5 if someone can show the mechanics of doing this, will be appreciated much.
asked by anonymous 
Physics
Two very long, straight, parallel wires separated by distance d carry currents of magnitude I in opposite directions. Find the magnetic field at a point equidistant from the lines, with a distance 2d from each line.
asked by Lee 
math
What is the major axis and the domain of the equation 9x^2 + 16y^2  36x + 96y + 36 = 0 ?
asked by dcw 
american literature
choose an epigram in the excerpt from Emerson's Nature? or where can i find information on it
asked by Anonymous 
Statistics
True or False Alpha level becomes zero only when both samples reflect different populations.
asked by RMJ 
CHM
Given the initial concentrations of 0.10 atm NO2 and 0.10 atm N2O4 in a 1.0 L flask, what will be the equilibrium partial pressure of NO2? N2O4(g)=2NO2 Kp=0.660at319K Choose one answer. a. 0.10 atm b. 0.31 atm c. 0.045 atm d. 0.72 atm e. 0.19 atm
asked by AMI 
chemistry
write a balanced chem equation for solid lead (II) sulfide reacts with aq hydrochloric acid to form solid lead (II) chloride and dihydrogen sulfide gas.
asked by jen 
Probability
Could you please explain how to do this question. Suppose that a certain candidate is running in a city election. A recent poll of 500 randomly chosen voters concludes that 60% of the voters prefer this candidate. Determine the probability that the
asked by Sandy 
Chemistry
Given the elementary reaction: 2 NOBr==>2 NO + Br2 k = 0.80 Which variables obtained for this reaction will produce a straight line? log[NOBr] vs. t [NOBr] vs. t [NOBr]2 vs. t 1/[NOBr] vs. t instinctively i would choose B, but I am not sure what my prof is
asked by Val 
chemistry I
using this equation: CH4+2Cl2> CH2Cl2+2HCl. If 6.00g of Ch4 are mixed with 6.00g of Cl2, how much HCl can be made?
asked by jill 
Precalculus(NEED HELP ASAP PLEASE!!)
PLEASE HELP!! csc(theta)= 3/2 3pi/2 < theta < 2pi Find: sin(theta)= _____ ? cos(theta)= _____ ? tan(theta)= _____ ? cot(theta)= _____ ? sec(theta)= _____ ?
asked by jh 
Chemistry
If the same volume (130mL) of the buffer were 0.265 M in NH3 and 0.400 M in NH4Br, what mass of HCl could be handled before the pH fell below 9.00? I used the hendersonhasselbalch equation to solve this. i set it up as
asked by Kyle 
Physics
How man joules are required to increase the temperature of 1 kg of granite by 1000K using 790 joule/kilogramkelvin as the specific heat of granite.
asked by John 
Precalculus(NEED HELP ASAP PLEASE!!)
PLEASE HELP!! sin(theta)= 1/3 pi/2 < theta < pi Find: cos(theta)= ______ ? tan(theta)= ______ ? cot(theta)= ______ ? sec(theta)= ______ ? csc(theta)= ______ ?
asked by jh 
physics
A special prototype model aeroplane of mass 400g has a control wire 8cm long attached to its body. The other end of the control line is attached to a fixed point. When the aeroplane flies with its wings horizontal in a horizontal circle, making one
asked by Edwin 
physics
(a) What is the tangential acceleration of a bug on the rim of a 6.0 in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5.0 s? (b) When the disk is at its final speed, what is the tangential velocity of the bug? (c) One
asked by Kelsey 
physics
A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What
asked by april 
chemistry
Hydrogen and oxygen react according to the equation: 2H2 + O2 > 2H2O. According to Avogadro's law, how many liters of hydrogen are required to react with 2.0 L of oxygen at STP? How do you set this equation up and find the answer???
asked by Jen 
chemistry
Suppose you wanted to produce an aqueous solution of = 8.65 by dissolving the following salt KNO2. At what molarity would you use?
asked by sab 
sci
wat is the difference betwwen a mold and cast
asked by pavleen 
Biostatistics
Age(1014)(1519)(2029)(3039) (4044) Mid 12.5 17.5 25 35 42.5 P(X=x) .003 .100 .500 .300 .097 If we select a birth at random, what is the probability the mother is 19 years or younger?
asked by Louise 
Biology
In many tissues, one of the earliest responses to cellular injury is the rapid increase in the levels of the enzymes involved in the pentose phosphate pathway. Ten days after an injury, heart tissue has levels of glucose6phosphate dehydrogenase and
asked by Anonymous 
Chemistry
.12M Lactic Acid (HC3H5O3, Ka=1.4x10^4) is mixed with .10M NaC3H5O3 to form 1.00L solution. A. Calculate the pH of the solution after the addition of 50.0mL of 1.00M NaOH. B. Calculate the pH of the solution after the addition of 120.0mL of 1.00M NaOH.
asked by Emma 
PreCalc
[b]1. The problem statement, all variables and given/known data[/b] The average growth rate of the population of a certain city is 7.5% per year. The city's population is now 22,750 people. What is the expected population in 10 years? [b]2. Relevant
asked by Kate 
physics
a fluid flows through a horizontal pipe of varying crosssection. Assuming the flow is streamline and applying the bernoulli equation, show that pressure in the pipe is greatest where crosssectional area is greatest.
asked by Edwin 
science
Explain the function of ATP synthatase in both photosynthesis and cellular respiration.
asked by sarah 
math CAN SOMEONE PLEASE CHECK MY WORK
In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data
asked by KiKi 
7th grade Science
Determine your distance traveled if you walk 100m forward and then 35m backward
asked by Mary 
PreCal
Use the law of cosines to find the angle of Q between the given vectors. v=3i + j w=2i  j
asked by Hannah 
algebra
the body mass index is given by the formula, or model, I=700w/h(2), where w= weight and h = height in inches. Jerome is 76 inches tall. what weight will keep his body mass index between 25 and 33 Jeromes body mass index will fa;ll between 25 and 33 for the
asked by ron 
physics
If the amplitudes of the two waves are 3 units and 1 unit respectively, show by the principle of superposition that the ratio of the amplitudes of the stationary wave at an antinode and node respectively 2:1
asked by Edwin 
College Chem
The boiling point of water at 756 mm Hg is 99.85 degree C. What mass percent of surcrose (C12H22O11) should be present to raise the boiling point to 100.00 degree C at this pressure?
asked by Donna 
business
Discuss the general environmental challenges of international management that a manager faces in the global environment that she would not face in a domestic one?
asked by Anonymous 
algebra
I need help finding the center and latus rectum of the equation: 3y^2  2y + x + 1 = 0
asked by dcw 
chem
calculate delta H for N2O+4H2>N2+4H2O
asked by john 
chemistry
A 1.00 L volume of 0.609 M HNO3 is condensed to a volume of 0.750 L, calculate the molarity (M) of H+ in the new solution
asked by eng 
HendersonHasselbalch
If the same volume (130mL) of the buffer were 0.265 M in NH3 and 0.400 M in NH4Br, what mass of HCl could be handled before the pH fell below 9.00? I used the hendersonhasselbalch equation to solve this. i set it up as
asked by Kyle 
maths
a pizza is 22 cm and a third of it is covered in cheese what area is that that has been covered in cheese
asked by annika frost 
PHYSICS
Calculate the maximum amount of stretching (in percent) that a piece of steel can undergo before breaking under tension
asked by Joey 
science
Which pairs of substances will form a buffer when mixed in equal concentrations?
asked by krissy 
Financial Management
Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the following information: • The target capital structure consists of 40 percent debt and 60 percent common stock. • The company
asked by Michael 
chemistry
The pH of saturated Sr(OH)2 (aq) is found to be 13.12. A 10.0 mL sample of saturated Sr(OH)2 (aq) is diluted to 250.0 mL in a volumetric flask. A 10.0 mL sample of the diluted Sr(OH)2 (aq) is transferred to a beaker, and some water is added. The resulting
asked by anonymous 
Statstics
A loaf of bread is normally distributed with a mean of 22 ounces and a standard deviation of .5 ounces. What is the probability that a loaf of bread is
asked by Anonymous 
statistics
Section 5.3: Normal Distributions: Finding Values Answer the questions about the specified normal distribution. Q1: The lifetime of ZZZ batteries are normally distributed with a mean of 265 hours and a standard deviation ó of 10 hours. Find the number of
asked by looking for someone to varify my work please 
MATH
A model train is a scale model created from actual measurements. The scale factor for HO or Half Zero model trains is 1:87. A typical engine is 50mm in height and 200mm in length. Determine the actual dimensions of the train engine. Help Please
asked by Anonymous 
physics
a fluid flows through a horizontal pipe of varying crosssection. Assuming the flow is streamline and applying the bernoulli equation, show that pressure in the pipe is greatest where crosssectional area is greatest.
asked by Edwin 
mathword problem PLEASE CHECK MY ANSWER
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time
asked by KiKi 
English
1. He died young. 2. He died when he was young. 3. When he was young, he died. (Are they all the same?) 4. a strong wind, a high wind, a heavy wind, 5. a weak wind, a low wind a light wind, a gentle wind 6. a warm wind, a chill wind, a chilly wind, a
asked by rfvv 
statistics
A loaf of bread is normally distributed with a mean of 22 ounces and a standard deviation of .5 ounces. What is the probability that a loaf of bread is < 20.75 ounces?
asked by Anonymous 
GEOMETRY
Decide which of the variables described is likely to have a normal or nearnormal distribution. a. The number of courses remaining until graduation for the students in a small liberal arts college b. The SAT mathematics scores for students in an advanced
asked by ISOFI 
sociology
unsocialized, spontaneous, self interested component of our personalities a Soul b Aura c "I" is the answer b? i tried to find it in my text book but couldnt thanks so much
asked by EMH 
another word problem!
iN 1993, THE LIFE EXPECTANCY of males was 68.6 years. In 2000, it was 71.1 years. Let E represent the life expectancy in year t and t represent the number of years since 1993. The linear function E(t) that fits this data is: E(t)=_t + _ (round to the
asked by bob 
Astronomy
Scientists can determine what distant stars are made of, as well as their temperatures and velocities, by looking at A absorption B emission spectra C continuous spectra D samples obtained from them E we cannot determine these things about distant stars I
asked by Anonymous 
calc
Find the critical numbers of the function. f(x) = x^2ln(x)
asked by Morgan 
Math
the ratio of 8ft. to 4 yd
asked by Vickie 
chemistry
A solution is prepared by dissolving 0.2222 (¡¾0.0002) g of KIO3 in 50.00 (¡¾0.05) mL. (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of significant figures. (ii) Find the molarity and its uncertainty with an
asked by Hobson 
algebra
How do i find the transformed equation of the hyperbola xy = 4 when rotated 45 degrees? I don't understand at all. my choices are: A  (x')²(y')² = 4 B  (x')²  (y')² = 4 C  (x')²  (y')² = 8
asked by dcw 
Behavior Science
Explin the communication process of neurons in the brain. List some common neurotransmitters and describe their effect on behavior.
asked by Teresa 
PreCal
Find the magnitude and direction angle of the vector v. v= 8(cos135 degrees i + sin135 degrees J) I think that the answer is v= 5 and Q = 135. Am I correct?
asked by Hannah 
help plz?
Which word is an antonym of vociferous? a}softspoken b}clamorous c}blatant d}obstreperoys
asked by lidsey 
Astronomy
Retrograde motion describe the A backward motion of the stars relative to Earth B uniform circular motion exhibited by the planets C irregular speeds at which the planet travel. D backward motion of the planets with respect to the stars I think the answer
asked by B 
maths
how many turns must a bicycle wheel of a radius 0.5 m make to travel a distance of 100 m
asked by annika frost 
social studies
Woodrow Wilson faced a number of obstacles in making his Fourteen Points a reality including several of his own making and some that were beyond his control. Discuss the nature of these obstacles and why Wilson failed to achieve his goals? Please help!
asked by Dellaine 
Math (Accounting)
Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the following information: • The target capital structure consists of 40 percent debt and 60 percent common stock. • The company
asked by Michael 
trigonometry
solve for 2cos2x=tan225 and, solve using transformation method cosx+ root2sinx= root3 THANKS!
asked by TRACY 
English
We use 'Yours sincerely' or 'Sincerely urs.' at the end of a letter. Then what is the full form of 'Yours sincerely'? 1. I am your sincerely friend. 2. I am your sincerely servant. 3. I am your sincerely friend/servant. 4. I am your friend/servant
asked by rfvv 
MATH
A model train is a scale model created from actual measurements. The scale factor for HO or Half Zero model trains is 1:87. A typical engine is 50mm in height and 200mm in length. Determine the actual dimensions of the train engine. Help Please
asked by Anonymous 
math
The mean score on a Math exam was 50% and the standard deviation was 10%. Assume the results were normally distributed. (a) What percent of students earned a score between 50% and 70%? (b) If 60 students took the exam, how many got a score between 50% and
asked by kevin 
literary
what is the subordinating conjunction in this sentence..? I mentally outlined my essay while i waited for the bus.
asked by k 
math
when sixty five and fourteen hundredths is subtracted from eighty and forty eight hundreths what is the difference
asked by ikd 
Geology 101
Why are nights in arid lands surprisingly cold?
asked by Brandi 
Physics
The first line of the Balmer series in Hydrogen atom corresponds to the n=3 to n=2 transition, this line is known as Halpha line. What would be the selection rule for the n=3 to n=2 transition and corresponding lifetimes.
asked by Akshay 
social studies
Discuss how World War I affected the lives of Americans. How did it change American social realities regarding women the family and society in general? Please help I've looked and just cant come up with nothing.
asked by Dellaine 
Human relations
what types of communication filters are present A female doctor attempting to explain to her 27yearold male patient that his severe acne can be cured with a specific drug, but the side effect of the drug might be that he will be temporarily bald. Filters
asked by Ravioli 
chemistry
Which of the following values corresponds to the equilibrium constant K for the dissociation of acetic acid? The standard free energy of formation, G0f of CH3COOH (aq) is 396.46 kJ mol1 and that of CH3COO (aq) is ¡V 369.31 kJ mol1. (a) 1.75 x 105 (b)
asked by Bell90 
chemistry
1gm of AgNO3 is dissolved in 50ml of h2o. it is titrated with 50ml od sol. agi is precipitated is filtered of.the exces of ki is then titrated with 1/10M KIO3 in the presence of acidic medium until all I>>ICl. it reqires 50ml of the 1/10M KIO3 sol. 20ml
asked by debby 
7th grade science
Determine your distance traveled and displacement if you walk 100m forward and then 35m backward please answer as soon as possible thank you
asked by Mary 
Accounting PLEASE HELP!!!!!!!!!
Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the following information: • The target capital structure consists of 40 percent debt and 60 percent common stock. • The company
asked by Michael 
chemistry
2.) A particular vinegar is found to contain 5.9% acetic acid by mass. What mass of this vinegar should be diluted with water to produce 0.750 L of a solution with pH = 4.58?
asked by anonymous 
sewing
explain the key and basic factors?
asked by Mel 
ALGEBRA
Find the coordinates of the midpoint for the following equation: y = 2x^2 + 20x + 1. Your answer should be in the form (xcoordinate, ycoordinate). (Hint: Find the xcoordinate by using the Midpoint Formula [b / (2a)]. Then find the ycoordinate by
asked by GGIFT 
Chemistry
IN the polystyrene beaker, mix 20mL of 0.1 M Acetic acid and 25mL of 0.1M Sodium Acetate and immediately measure the pH. Remove the electrode and add 5ml of 0.1 M HCl to this buffer. Stir the solution and measure the pH. _______________ INFO: concentration
asked by Saira 
Psy 210
What relationship factors or considerations might be influencing Michael’s or Jennifer’s problems?
asked by Bullzeye 
chemistry
While researching energy values of fuels, a chemist designed an experiment to find out the heat of combustion of pentane. Using the known hexane heat of combustion of hexane = 4650kJ/mol and the data below calculate the heat of combustion of pentane. Set
asked by sarah 
statistics
A column packing for chromatography consists of a mixture of two types of particles. Assume that the particles in the batch being sampled are spherical with a radius of 0.5 mm. 36% of the particles appeared to be pink and are known to have a polymeric
asked by Simon 
ALGEBRA
Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? When might each method be most appropriate? Which method do you prefer?
asked by GGIFT 
accounting
How is the receipt of a dividend recorded under the equity method?
asked by Karla 
Physics
You meet a person with prescription glasses of +0.55 dpt. What is the near point of this person? Express the result as a positive number! Hint: the near point of a healthy person is 25 cm. An object placed at this distance will form an image at the near
asked by Sandra 
physics
Physics force of friction question a 63kg water skier is pulled across a lake by a rope that exerts a force of 3.2x10^2 and makes an angle 17 degrees above the horizontal. if the coefficient between the skies and the lake is 0.27 at what rate will the
asked by jake 
chm152
At a particular temperature, Kc = 54 for the reaction H2(g) + I2 (g) 2 HI(g). One mole of HI is placed in a 3.0L container. What would be the equilibrium concentration of HI? Choose one answer. a. 0.035 b. 0.071 c. 0.29 d. 0.30 e. 0.33
asked by AMI 
Astronomy
The speed of light is the same for all observers, and the laws of physics are the same for all observers in uniform motion. These two statements are fundamental postulates of A) general relativity B) Newtons laws of motion C) special relativity D) the laws
asked by Anonymous 
College Chemistry
The boiling point of a liquid at atmospheric pressure is the temperature: a. at which bubbles of vapor expand within the liqud b. at which the liquid solidifies c. at which the vapor pressure first exceeds the critical temperature d. at which the vapor
asked by Donna 
algebra
Hockey Teams Receive 2 Points When They Win And 1 Point When They Tie. One Season A Team Won A Championship With 65 Point. They Won 10 More Games Than They Tied. How Many Wins And How Many Ties Did The Team Have?
asked by ron 
chemistry
While researching energy values of fuels, a chemist designed an experiment to find out the heat of combustion of pentane. Using the known hexane heat of combustion of hexane = 4650kJ/mol and the data below calculate the heat of combustion of pentane. Set
asked by sarah 
Chemistry
The first excited state of the hydrogen atom is separated from the ground state by 10.2 eV. (a) At what wavelength does this occur and what is the energy difference in kJ mol1 between the ground and excited states? Show your working in each case. (b) If
asked by Hobson 
chem
when doing a paper chromatography lab, my class used a solvent with a neutral pH, which my teacher said would help separate the amino acids with simialar Rf values. can anyone please explain why we needed to use a solvent with a neutral pH?
asked by chrissy 
college chemistry
EPA acidity test can be performed by titrating water sample to a pH of 8.2. What titrant in what concentration would you suggest for EPA acidity determination?
asked by alissa 
chemistry
The standard free energy of formation of the aqueous complex ion Cd(NH3)42+ is 226.1 kJ mol1. The free energy of formation of NH3 is 26.50 kJ mol1 and that of the Cd2+ ion is 77.61 kJ mol1. The value of the stability constant for the complex ion
asked by Bell90 
College Chem
If equal masses of O2 and N2 are placed in identical containers at the same temperature, which of the following statements is (are) true?
asked by Donna 
Chemistry
What is C2H5OH?
asked by Christopher 
math
24x10=18x4
asked by maeve 
statistics
the life expectancy of lung cancer patient treated with a new drug is normally distributed with a mean of 4 years and a standard deviation of 10 months what is the probability that a randomly selected lung cancer patient will last more than 5 years
asked by yolanda 
mathslope
f(x)=2x3 Find the slope and the y intercept
asked by KiKi 
11th gradephysics
a cannon with a mass of 1,500kg fired a 7kg cannonball along its 3m long barrel in 0.015 seconds a)calculate the acceleration of the cannonball b)the force acting on the cannonball c) the reaction force exerted on the cannon d)the acceleration of the
asked by Bill Williams 
social studies
discuss how world war I affected the lives of americans. how did it change american social realities regarding women the family and society in general? Can someone help me on this?
asked by Dellaine 
Science
What is time dilation refers: to increasing time factors as one's speed increases I can not find any information on this
asked by Anonymous 
physics
Show that a force acting along a given line can always be replaced by a force of the same magnitude acting along a parallel line, together with a couple.
asked by Edwin 
physics
A clean glass capillary tube is held vertically in water raised to a height of 7cm. The tube is down depressed and only 5cm of its length is above water. What will be the angle of contact?
asked by Edwin 
math
The difference between the ages of two friends is 2 years. The sum of their ages is 74 years. Find the age of the older friend.
asked by Anonymous 
college Chemistry
An aqueous solution of hydrogen peroxide, H202 (MW=34.01amu), is labeled 10.0% by weight. What is the molal concentration of H202? All I really know is that molality = moles of solute per kilogram of solution
asked by Donna 
Physic
A particular comet has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823 1010 m and moves with a speed of 54.6 km/s. The greatest distance between this comet and the Sun (aphelion) is 6.067 1012 m. a. Calculate its
asked by Mary 
English
Can you please check the following questions as I need to prepare them for tomorrow. Thank you very much in advance. 1) Examine the main features of Queen Victoria's reign and its contributions to the shaping of modern Great Britain. 2) Explain how
asked by Franco 
English
With your partner, talk about what is seen in the picture taking turns. Sentence A is an example sentence. Like Sentence A, make sentences looking at the picture. I see a cat is playing with a ball on her right hand. I see a lady who is watching TV lying
asked by rfvv 
algebra
one canned juice drink is 15% orange juice; another is 5% orange juice. how many liters of each should be mixed together in order to get 10 liters that is 10% juice? how many liters of 15%? how many liters of 5%?
asked by ron 
mathplease help due tonight
find the two ordered pairs from this equation. y+x=2 then give the ordered pair of the y intercept?
asked by KiKi 
sci
how does a mold fossil form
asked by pavleen 
physics
A clean glass capillary tube is held vertically in water raised to a height of 7cm. The tube is down depressed and only 5cm of its length is above water. What will be the angle of contact?
asked by Edwin 
environmental science
Starting with a hypothetical population of 14,000 people and an even age distribution (1,000 in each age group from 15 to 6670 years), assume that the population initially has a total fertility rate of 2.0 and an average life span of 70 years. Using the
asked by sarah 
College Chemistry
A 0.05 molal aqueous solution boils at 373.102 K. What is the salt in question? a. AlCl3 b. NaHSO3 c. MgCl2 d. NH4Cl e. NaCl I guessed NH4Cl and got 3 points off. I used the formula delta T=K boiling point X molality
asked by Donna 
Social Studies
What were the results of the Battle of Fallen Timbers?
asked by Rylee 
chemistry
The concentration is 1.67M. I have 5.28 grams of ethanol. How many liters of water will I need to make this solution with the above concentration?
asked by linda 
art
takes on the form of an informative, newspaper advertisement. · describes the cultures, including religion, language, and general philosophies and beliefs. · describes the relationship between the cultures and the arts.
asked by Anonymous 
classroom instruction
• Plan a science experiment. In your paper, address the following points: o List the equipment and materials to be included in the science kit. o Explain what safety precautions are needed. o Outline the stepbystep procedures for the experiment. o
asked by scooby 
Science please i need help!!!!!!!!!!
how can two observers measure a different speed for the same moving object
asked by dina 
Math
If the volume of the rectangular prism is 360cm3 and the height is 28cm, what is the width and the length?
asked by Sara 
calc
how do i find the derivative of........ (sinx) ^2(cosx) ^2 i put it into my t89 and got 4sinxcosx butthats not a multiple choice. can someone tel me how to do this by hand?
asked by James 
college
Two parallel plates, each with zero mass and an area of 10,000 cm2 are set 0.1 mm apart and the space between them is filled with a Newtonian fluid. The upper plate is pushed in the direction shown with a constant force sufficient to accelerate a mass of 1
asked by BB 
Math
x + y = 2.2 How do I solve this?
asked by PLEASE HELP ME!! 
English
1.Choose a movie or a performance you saw recently and write down your story in the blanks. I like watching movies. I saw Titanic. I think it was fantastic. 2. Based on the summarized above, write down your movie report /write down your impression about
asked by rfvv 
science (energy)
What is chemical potential energy?? :)
asked by poppy 
Chemistry
What are the molar heat capacities of: H2O(l) NaCl and Tungsten? I got 75.32 J/K*mol 50 J/K*mol 24.8 J/K*mol
asked by Ana 
algebra
two angles are complementary. the sum of the measure of the first angle and half the second angle is 87 degrees. find the measure of the angles. What is the measure of the smaller angle? what is the measure of the other?
asked by ron 
astronomy Confuse
Time dilation refers to:? A the slowing of time of a moving clock as measured by observer considered to be at rest B increasing time factors as one's speed increases C the slowing of time of a moving clock as measured by the moving clocks D the illusion of
asked by Anonymous 
math
Can someone help me find the two order pairs of this problem.. 5x+6y
asked by KiKi 
mathword problem
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time
asked by KiKi 
algebra/common math
how do I solve this? I know it's common math, but I cannot remember how! 4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!
asked by bob 
science
Explain how a fossil mold different from a fossil cast
asked by pAvLeEn 
Science
I have to create a slide show of 710 slides about urbanization, yet I am confuse on where to start. I also have to discuss the main points of urbanization, and challenges of urbanization. How do i start? I been looking up some few examples but still don't
asked by Nary 
chemistry
How much water is added to 5.28 grams of ethanol to get a concentration of 1.67M?
asked by price 
social studies
woodrow wilson faced a number of obstacles in making his Fourteen Points a reality including several of his own making and some that were beyond his control. Discuss the nature of these obstacles and why wilson failed to achieve his goals? PLease Help!!!!
asked by Dellaine 
science optics
A cosmetic mirror is 50cm from your face and the magnified image of your face is upright. You are told that the focal length of the mirror is 45cm. Explain why this focal length is not possible. I understand that the image would be magnified and
asked by lily 
Physics
Mercury vapour is used in as the dominant species which is excited in a traditional fluorescent light. The first and second excited states of Mercury occur at 254 and 185 nm. Calculate the energies of each of these transitions? What equation am i suppose
asked by Max89 
computerclass
I am so confused,i have no idea what these are When resizing an image for display on a computer monitor you should reduce its resolution to _____? An audio file that is played as it arrives from the internet without saving it to a users computer is called
asked by fred 
maths
find x, tanxsinx= 3sinxsecx
asked by michael 
finance
A machine cost $ 4,000. It lasts 2 years and has no scrap value (that is, it has no value at the end of those two years of use). In each year, it produces $ 2400 in income. Should the firm invest in the machine if the interest rate is 10%? Should the firm
asked by Claire 
math115
There are 42 milliliters (mL) of acid in 200 mL of a solution of acid and water. What percent of the solution is acid?
asked by Bstone 
chemistry
At STP, 412 ml of gas have a mass of 2.60 g. What is the molar mass of gas?
asked by Peggy 
Math 157
A 7 inch pizza cost $8 and a 14 inch pizza costs $20. Tommy says the smaller pizza is a better buy because the larger pizza is twice as big and more than twice as expensive. Do you agree with his reasoning? Explain why or why not.
asked by Lori 
math
Earth exerts a force on an object equal to the objects weight. the object exerts a force on earth I think the answer is it equal zero?
asked by Anonymous 
English
1. Push the gate shut. 2. Pull the gate open. 3. He slammed the door open/closed. (Are they all grammatical? What is the part of speech of 'shut,' 'open' or 'closed'? Are they adjectives or verbs? )
asked by rfvv 
algebra
I need help! Solve by the elimination method: 7r9s=12 9r+7s=96 When I do this, I get a crazy fraction, and I know the answer is a point. (r,s) But what I'm getting is ridiculous. I got 564/130=s! That has to be totally wrong!
asked by bob 
Assignment Help
There are 1000 students in the University of A. A sample of 10 observations was obtained regarding the rating of the service quality of dining hall. Here is the sample: Observation Rating 1 5 2 6 3 7 4 3 5 8 6 5 7 6 8 3 9 4 10 7 calculate the confidence
asked by JL 
Calculus
Find the derivative of y=cos(squarerootsin(tzn(pi*x)))
asked by Stephanie 
bio
Explain the roles of helicase and polymerase in DNA replication.
asked by Anonymous 
math CAN SOMEONE PLEASE HELP
find the two ordered pairs of this equation. y=5/3x+8 then give the slope and y intercept. I know the slope is rise over run and is the y intercept 8? This is the answer I got but I am still really confused how do I get my two ordered pairs this makes no
asked by KiKi 
computer class
Which color scheme provides the least ammount of contrast? A. monochromatic B.simple triad C. complementary D. split complementary triad I think its monochromatic but i'm not sure. Also which color arrangement would create the deepst sense of space? A.
asked by jon 
science
If you add solids ( ie. salt and pepper) to water, does it become more dense? Thanks to all who answer!!!! Wizard
asked by wizard 
Physics
E2 (total) of rod (of length L = 9.15 mm) = 4.18 ×10^3 V/m. E1=1.76 x 10^3. E3=1.57 x 10^3. The rod consists of three sections of the same material but with different radii. The radius of section 3 is 2.27 mm. What is the radius of (a) section 1 and (b)
asked by Shawn 
please help! Examples in book are different!
train A and b are traveling in the same direction on parallel tracks. Train A is traveling at 40 mph, and B is at 60 mph. Train A passes the station at 12:25 am, and train b passes the station at 12:40 am, what time will train b catch up to train A?
asked by bob 
math
Determine the area between the zscores in each pair for a normal distribution. Round your answers to 4 decimal places. (a) 1.12 and 1.98 (b) –2.12 and –1.0
asked by jason 
spanish
I need to fill in the blanks with the correct indirect or direct pronouns. Voy a compara esta corbata para mi papa. Voy a  para su cumpleanos.
asked by tina 
7th grade Science
Think critiacally how could 2 observers measure a different speed for the same moving object please answer as soon as possible thank you
asked by me myself and i 
chemistry
This is super confusing complex brain killing A column packing for chromatography consists of a mixture of two types of particles. Assume that the particles in the batch being sampled are spherical with a radius of 0.5 mm. 36% of the particles appeared to
asked by Simon 
science (energy) really needs help!!!
What is chemical potential energy?? :) please help!!!!!!!!!!!!!!!!!!!!!!!!
asked by PoppY!!!!!!!!!!!!!!!!!!!! 
environmental science for college
Starting with a hypothetical population of 14,000 people and an even age distribution (1,000 in each age group from 15 to 6670 years), assume that the population initially has a total fertility rate of 2.0 and an average life span of 70 years. Using the
asked by sarah 
math
The two triangles are similar. Find g., just need to finish the formula, I have this so far g/15 = 15.65/10.5 g=
asked by Bstone 
ALGEBRA
How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution?
asked by GGIFT 
cultural diversity
did the native americans face prejudice, segregation, racism, or any combination of the three?
asked by Cindy 
chemelectrochemistry
So in this reaction: Ag(s) + Fe(+3) > Ag(+) + Fe(+2) we are given 20 grams of Ag(s) to start off with. How do we find how many electrons are transfered in the reaction. And how many grams of Fe(+2) is formed. *for the latter, i think that we can
asked by Rav 
phi105
Susan Moller Okin argued against the theories of Rawls, Nozick, MacIntyre and others. Why? Anyone?
asked by trudy 
AP Chem.
NaCl dissociates completely in water. Therefor the total number of particles in a 1.0 m NaCl solution is no longer 6.02 X 10^23. Since a colligative property is dependent only on the total number of solute particles, what is the freezing point for 1.0 m
asked by Heather 
math
find the two ordered pairs from this equation. y+x=2 then give the ordered pair of the y intercept?
asked by KiKi 
psychology
So you answered my question to tell me not to post it twice that was an accident...heres my question i need some help please, don't tell me to post again because it was by accident. Which color arrangement wouldcreate the deepest senseof space? A.
asked by jake 
PreCal
Find the vector v with the given magnitude and the same direction as u. Magnitude: v=3 direction: u=(4,4) I am not sure what to do here or how to start.
asked by Hannah 
math substitution method
use the substitution method to solve 7x+5y=26 x=286y
asked by KiKi 
word problem
train A and b are traveling in the same direction on parallel tracks. Train A is traveling at 40 mph, and B is at 60 mph. Train A passes the station at 12:25 am, and train b passes the station at 12:40 am, what time will train b catch up to train A?
asked by bob 
PreCal
Find the component form of v given its magnitude and the anlge it makes with the positive aaxis. v=3 v in the direction 3i + 4J Would the component form be (3,4)?
asked by Hannah 
geology
I am looking for some ideas of various geological events of Florida
asked by nicole 
Math CAN SOMEONE PLEASE CHECK MY WORK?
7x+5y=26 x=286y solve using substitution okay so then 19642y+5y=26 then combined like terms so 196+37y=26 37y=222 y=6 is this part correct?
asked by KiKi 
chemistry
What is the of an aqueous solution that is 0.128 M NH4Cl ?
asked by sab 
economics
Why would flat panel TV prices drop over time?
asked by rob 
Physic
Two softballs, each with a mass of 0.125 kg, are separated by a distance of 820 m in outer space. a. If the balls are released from rest, what speed do they have when their separation has decreased to 680 m? Ignore the gravitational effects from any other
asked by Victoria 
chemistry AP
You have to design a buffer based on one of the systems below System 1: HA1 and A11 K= 4 E3 System 2: HA2 and A21 K= 5 E4 System 3: HA3 and A31 K= 6 E5 For the following parts assume that the buffer above in system2 has been constructed with [HA] =1M
asked by maya 
7th grade
WAt dose science Mean
asked by Brenna 
psychology
Which color arrangement wouldcreate the deepest senseof space? A. red,orange,blue B. Green violet, blue C.Yellow, orange,yelloworange D. Violet, blueviolet, redviolet What are the double split complement colors for bluegreen?
asked by Jake 
Science
what are new chemicals initiatives or technologies that are used to correct anoxic waters?
asked by Amy 
math
when sixty five and fourteen hundredths is subtracted from eighty and forty eight hundreths what is the difference
asked by ikd 
7th grade Science
Describe how the instantaneous speed of a car changes when the car is moving with constant speed , speeding up, and slowing down please answer as soon as possible
asked by me 
English II
When someone says he blockade me with a chair. What is the word blockade movement compared to?
asked by Betty 
algebra
plans, under plan A, Giselle would have to pay the first 130 dollars of her nedical bills plus 35% of the rest. Under plan B Giselle would pay the first 210 dollars but only 20% of the rest. for what amount of medical bills will plan B save Giselle money?
asked by ron 
sms
a. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan one and y to represent floor plan two. Write an equation that illustrates the situation. x + y=56 The sales
asked by tim 
Science Please I NEED Help!!!!!!!!!!!!!!!!!!!!!!!!
Describe how the instantaneous speed of a car changes when the car is moving with constant speed , speeding up, and slowing down please answer as soon as possible
asked by dina 
phi105
Susan Moller Okin argued against the theories of Rawls, Nozick, MacIntyre and others. Why? can you be more specific to where I might be able to find the answer.
asked by trudy 
math (advanced alg and trig)
Solve to the nearest minute: x is greater than or equal to 0 and less than 360. 3sec^2 x8tan6=cotx
asked by Anne 
nutrition
a 1,400 to 1,750word paper in APA format outlining your healthy eating plan. You must discuss the following:
asked by Anonymous 
mathword problem
Amy paid $53.74 for a pair of running shoesduring a 15% off sale. what was the regular price?
asked by KiKi 
calculus
Determine all the absolute extreme values for the function f(x,y) = sin(x)*sin(y)*sin(x+y)on the square 0
asked by LOL 
geometry
sketch a number of pens that can be constructed using 24 m of fencing
asked by sadie 
math
I need help! Solve by the elimination method: 7r9s=12 9r+7s=96 When I do this, I get a crazy fraction, and I know the answer is a point. (r,s) But what I'm getting is ridiculous. I got 564/130=s! That has to be totally wrong!
asked by bob 
Biology / Biochemistry
How will the conformation of an Enzyme (a protease) be affected when the amino acid residue is substituted with glutamate instead of glutamine?
asked by Alan 
math
x+2y=4 Find the ordered pairs would this be (0,2) and (4,0)?
asked by KiKi 
mathgraphing
y>5 x>6 How would I get ordered pairs to graph this?
asked by KiKi 
mathword problemplease help
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time
asked by KiKi 
math system
x+5y=4 x=75y give the ordered pair
asked by KiKi 
sci
what is mold fosil
asked by pavleen 
math
Find the two ordered pairs using this equation x+3y=6
asked by KiKi 
Math
x + y = 2.20 How do I solve this?
asked by Ann 
Science
What is sodium perborate bleach?
asked by Christina 
Maths
Alright I'm doing a maths review (grade 11) and on the page, the subtitle says "Quadratics" and then underneath is the questions, no instructions. I figured out the first one "y^2+2y+1" and got to "(y+1)^2", but the second question is "49(2yw)^2". I
asked by Felicity 
English
Thank you very much for your corrections. Can you tell me if the following household chores are possible? Please, let me know if there is a better expression. I have to: sweep, vacuum and mop floors wipe counters, stove top, table and cupboards. sort the
asked by Franco 
health
I have to describe how research has made possible any medical advances in AIDS, and I've tried searching it on bing. I need some website suggestions.
asked by AL 87 
algebra
hocky teams receive 2 points when they wi and 1 point when they tie. One season, a team won a championship with 65 points. they won 10 more games than tied. how many wins and how many ties?
asked by ron 
algebra
Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60 miles per hour and train B is traveling at 70 miles per hour. Train A passes the station at 10:15 p.m. If train B passes the same station at 10:27 p.m, at
asked by Anonymous 
history
i have to do a power point presentation of 69 slides. no more than 1/3 of the presentation can be pics. i have to include speaker notes and references. it also must include at least 1 intext citation. Explain how the U.S. became involved in the politics
asked by nicole 
ESL
How do the varieties of standards available to teachers provide a focus on high expectations and the motivation needed to tailor instruction to meet the needs of the learner?
asked by JEAN 
math
Would a drop of 40 Celsius degrees be more or less than a drop of 40 fahrenheit degrees? explain why C = 5/9 (F  32)4032=8c F = 9/5 C + 32 40+32=86f
asked by Dylan 
English
1. I like action programs. 2. I like action movies. 3. I like action movie programs. 4. I like action movie TV programs. 5. I like watching action movies. 6. I like watching action movies on TV. 7. I like watching action TV programs. 8. I like action movie
asked by rfvv 
calc
find the critical no's/ points in (X^2)(lnx)
asked by Mia 
Precalc
I think it was skiped can you post resposne in this question h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 9 8 2 9 1 7 1
asked by Kate 
Science
How do you create a perfect urbanization powerpoint slideshow and where do i found the facts from?
asked by Nary 
math
how do I solve this? I know it's common math, but I cannot remember how! 4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!
asked by bob 
cultural diversity
were the native americans affected by dual labor market, environmental justice issues, affirmative action, redlining, double jeopardy, institutional discrimination, reverse discrimination, glass ceiling, glass walss or glass escalator?
asked by Cindy 
math
Relative humidities (represented by RH below) of less than 51% cause problems in growing crops. The Saskatoon region is a prime wheatgrowing area. The mean RH in Saskatoon is 59% in July, with a standard deviation of 8%. The RH for the days in July forms
asked by ken 
English
What is the best topic to write a satire on?
asked by 11th grade 
Accounting
to find noncontrolling?? you add the common stock and retained earning and then minus the investment? is this correct
asked by Karla 
history
how did the u.s.involvement in vietnam in the 1950's impact the political climate
asked by audrey 
Problem Posting
trying to post a question, but it says I'm not allowed to post internet addressesbut I'm not. any ideas on this?
asked by Val 
ALGEBRA
Examine the following equation: y = 2x^2 + 20x + 1 * What shape does the graph of this equation make? (Hint: You should be able to tell just by looking at the first term of the equation.) * Does the graph open up or down (Hint: You should also be able to
asked by GGIFT 
science
make inferences to answer the foeoling question: At which pencil point was oxygen produced? can u help me plz?
asked by Star 
Rigor Mortis
When does rigor mortis occur?
asked by Lena 
calc
how to find the integral of this function x^2 * root(x^3+1)
asked by James 
Science
what can you say about the ages of two wild separted layers of rock that contain the same type of fossil
asked by pAvLeEn 
math like terms
collect like terms 10c+5d5c8d= 5c+3d? is this correct?
asked by KiKi 
Psycology
Compare and contrast the roles that ethics and laws play within human service organizations
asked by Kitty 
math
Help! These are fractions, so bear with me: 5/8 x= 9/10 Solve with the multiplicaation principle. How do I do this? The fractions throw me off every time!!!
asked by bob 
PAS
what type of slanter is this; face it, honey!! you're not as good as me and you never will be!!
asked by Anonymous 
Algebra
If a bottle and a stopper costs $1.10. How much does the stopper cost?
asked by Greg 
english
is this correct: A street and a school were named after Sophie Germain. is it were or was?
asked by Sara 
Science Please give me a hint thank you
how can two observers measure a different speed for the same moving object
asked by Asia 
concepts in Organizational Behavior
You are currently working as a management consultant. You and your partner have been asked to analyze the corporate culture and organization of USA Today. You have decided to use the StepbyStep Analysis to aid you in your work. You have decided to
asked by Azizeh 
mathgraphing
How would I graph the equation y=6?
asked by KiKi 
science
how can two observers measure a different speed for the same moving object
asked by dina 
mathslope and y intercept
find the two ordered pairs of this equation. y=5/3x+8 then give the slope and y intercept. I know the slope is rise over run and is the y intercept 8?
asked by KiKi 
math
i need help simplyfying this question it is 85b1. show me how you do it step by step. i would not mind a few notes
asked by Alexa 
chemistry
what happens when bicycle tyre bursts in summer due to adiabetic expantion?
asked by swagat 
9th grade conceptual physics
How do you find the cargo capacity for a boat?
asked by Sara 
math
Help! These are fractions, so bear with me: 5/8 x= 9/10 Solve with the multiplicaation principle. How do I do this? The fractions throw me off every time!!!
asked by bob 
Math 30
How would I do this question. What sample size was needed to obtain an error range of 2% if the following statement was made. 75% of the workers support the proposed benefit package. The results are considered accurate to within + or 2%, 18 times out of
asked by Rae 
definition
what does the quote, "you can never take for granted," mean?
asked by AL 87 
sci
wat is body fossil
asked by pavleen 
Science
What is insulating fiberglass?
asked by Christina 
Help plz?
An example of aphersis is: a}account b}phone c}typewriter d}reconcile
asked by lidsey 
mathslope
would the slope of (0,3) and (6,3) be 6/6?
asked by KiKi 
geology
what is a popular geological feature of florida
asked by nicole 
math
6x4y=20 and 4y6x=20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions These points would have C correct?
asked by KiKi 
MAth
f(x)=x^29x+3
asked by Help 
Math
If a bottle and a stopper cost $1.10. How much does the stopper cost?
asked by Bob 
MAth
f(x)=x^29x+9
asked by Help