Questions Asked on
April 29, 2012

college physics
Superman must stop a 190km/h train in 180m to keep it from hitting a stalled car on the tracks. part a)If the train's mass is 3.8×10^5kg , how much force must he exert (find the magnitude)? part b)Compare to the weight of the train (give as %). partc)
asked by john 
physics
question : net force of 225 N accelerates a bike and rider at 2.65m/s^2. What is the mass of the bike and rider together ?
asked by emma 
Econ/stats
The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Develop a leastsquares regression line and explain what the slope of the line
asked by Ruth 
physics
A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm. a)Find the frequency of this radiation. b)Find the time required for a pulse of radar waves to reach an airplane 4.8 km away and return.
asked by Kristie 
surface area and volume
I really need some help, I don't fully understand. Exspecially with fractions, don't know how to enter them on calculator. 1. What is the approximate volume of the sphere? 524 m³ (my choice) 1,000 m³ 1,256 m³ 1,570 m³ 2. What is the approximate surface
asked by lilman 
analyzing poem
The Butterfly  Pavel Friedmann He was the last. Truly the last. Such yellowness was bitter and blinding Like the sun’s tear shattered on stone. That was his true colour. And how easily he climbed, and how high, Certainly, climbing, he wanted To kiss the
asked by bkue 
Maths
Alfred spent 1/4 of his money on food,1/3 on clothing and saved the rest.If he saved #72,000.How much did he spend on food?
asked by Chibueze 
Physics
A juggler has a set of balls that she can toss into the air. If it takes her 0.2 s to transfer a ball from the receiving hand to the launch hand and she is able to throw a given ball straight up with a maximum speed of 10 m/s how many balls can she
asked by Bob 
Life orientation
Identify and describe one environmental problem that causes ill health,accidents,crises and disasters within your community or any other community within south Africa or globally
asked by L.P Mhlanga 
physics
An astronaut on the Moon attaches a small brass ball to a 1.00 m length of string and makes a simple pendulum. She times 15 complete swings in a time of 75.0 seconds. From this measurement she calculates the acceleration due to gravity on the Moon. What
asked by Kristie 
Stats
A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5 ounces. After the redesign, the absorption amounts of a sample of sponges were (in ounces): 4.1, 3.7, 3.3, 3.5, 3.8, 3.9, 3.6,
asked by Tom 
Statistics
The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Perform an F test and determine if the price and the number of flash drives sold
asked by Paul 
physics
Rank the beat frequency from highest to lowest for the following pairs of sounds:a. 876 Hz, 871 Hz b. 786 Hz, 784 Hz c. 721 Hz, 728 Hz d. 542 Hz, 541 Hz
asked by Jim 
area and volume
A balloon has a circumference of 22in. Use the circumference to approximate the surface area of the balloon to the nearset square inch. possible answers; 154in^2 616in^2 1,521in^2 484in^2 Find the volume of the square pyramid.Round to nearest tenth if
asked by lilman 
Physics
A balloon rubbed against denim gains a charge of −2.0 µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm? (Assume that the charges are located at a point.) The value of the Coulomb
asked by Angel 
physics
What beat frequencies are possible with tuning forks of frequencies 258, 263, and 267 Hz?
asked by Jim 
math
Terry, Barry, Larry, Jerry, and Perry are lined up in these positions midway through a track meet: Terry is 20 meters behind Barry. Barry is 50 meters ahead of Larry. Larry is 10 meters behind Perry. Jerry is 30 meters ahead of Terry. Perry is 50 meters
asked by Anonymous 
science
an empty density bottle weighs 25 gram. when completely filled with water, it weighs 55 gram and when completely filled with a liquid, it weighs 52 gram. calculate volume and density of the bottle.
asked by Surabhi 
kinetic theory
Air is filled at 60deg C in a vessel of open mouth. Upto what temperature should the vessel be heated so that onefourth of the air may escape? Ans 171degC
asked by ridhi 
Math
Luis has $150,000 in his retirement account at his present company. Because he is assuming a position with another company, Luis is planning to "roll over" his assets to a new account. Luis also plans to put $3000/quarter into the new account until his
asked by Terri 
physics
An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water, and a slender metal handrail. The speeds of sound in air, water, and the handrail are 355, 1410, and 5380 m/s,
asked by chelsea 
science
write a skeleton equation for this reaction hydrogen iodide(g)>hydrogen+iodide(G)
asked by Jessica 
physics
Imagine a Rip van Winkle type who lives in the mountains. Just before going to sleep, he yells, "WAKE UP", and the sound echoes off the nearest mountain and returns 7.6 hours later.Find the distance between Rip and the imaginary mountain.
asked by Jim 
Math
a young Colorado spruce tree is growing at a rate of 20 cm per year. Currently, it is 244 cm tall. A 300 cm tall white spruce tree is growing at a rate of 12 m per year. In how many years will the two trees be the same height? Solve algebraically
asked by Hanu 
math
An arithmetic series has a first term 8 and third term 20. What does the fifth term equal? What does the second partial sum equal?
asked by Kasey 
chemistry
calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)
asked by Randy 
physics
Light has a maximum constant speed in which of the following? A) water.B) red glass.C) the upper atmosphere.D) clear glass.E) between the atoms in glass, water, or the atmosphere. IS THIS C THE UPPER ATMOSPHERE?
asked by Kristie 
Physics
A small cork with an excess charge of +6.0 µC is placed 0.25 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in units
asked by Angel 
Chemistry
Write the IUPAC name for straightchain hydrocarbon with this formula: CH3CH2CH2CH2CH2CH2CH3 Write the IUPAC name for any branchedchain hydrocarbon with this formula:C9h20
asked by Allison 
statistics
The mean length of a work week for the population of workers was reported to be 39.2 hours. Suppose that we would like to take a current sample of workers to see whether the mean length of a work week has changed from the previously reported 39.2 hours. a.
asked by frances 
algebra
Is it possible for a degree4 polynomial P(x) to have only complex (no real) roots
asked by nash 
statistics
Lorraine was in a hurry when she computed a confidence interval for . Because was not known, she used a Student's t distribution. However, she accidentally used degrees of freedom n + 1 instead of n  1. v Will her confidence interval be longer or shorter
asked by trina 
calculus
A tight rope is stretched 30 feet above the ground between the Jay and the Tee buildings, which are 50 feet apart. A tightrope walker, walking at a constant rate of 2 feet per second from point A to point B, is illuminated by a spotlight 70 feet above
asked by Naseba 
high school diploma
what correction should be made to this sentence? one of the lifelong memories many of us share are the moment we obtained a driver's license?
asked by wilna 
MATH
A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the wheel has completed one revolution
asked by Anonymous 
biology
Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP? write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions.
asked by livleen 
Life Orientation
Critically discuss 8 ways in which the environmental problem impact on the community or any other community in South Africa.
asked by Nicola 
algebra
x^2 +4x +9y^2 36y +4=0
asked by bill 
Chemistry  Kp
What is the Kp for the following reaction: 2NH3(g) > N2(g) + 3H2(g) This reaction is contained in 1.0 L container at 1,000 K and has reached equilibrium. (Kc = 4.0 x 10^2). You have initially added 1,220 moles of NH3(g) in the flask.
asked by Addyson 
Algebra
The formula for the volume of a cylinder is: V=πr^2*h If the volume is 432 cubic inches and the height is 8 inches, solve for the length of the radius.
asked by Nancy 
Chemistry
A 1.00 L flask containing the equilibrium mixture CO +Cl2 COCl2 was found to contain 0.400 mol of COCl2, 0.100 mol of CO, and 0.500 mol of Cl2. If 0.300 mol of CO is added at constant temperature, what will be the new concentrations of each component at
asked by Divya 
spanish
¿Cuál frase es correcta? El hijo del maestro, quien estuvo en mi clase, es muy inteligente. El hijo del maestro, a quien estuvo en mi clase, es muy inteligente.
asked by david 
ALGEBRA
Find the APR for the following loan (monthly payments). (Round your answer to the nearest full percent.) Purchase a refrigerator for $2,100 at 20% addon interest for 3 years.
asked by Mike 
calculus
Find the volume of the solid obtained by rotating the region bounded by y=4x^2,x=1,y=0 about the xaxis.
asked by carlton 
Enviro Science
2. The water resources of Earth are located in a. salt water found in the ocean b. freshwater found in icecaps and glaciers c. fresh water found in rivers, lakes, and streams d. all of the above C 4. Weather is the state of the atmosphere at a moment in
asked by mysterychicken 
Physics
Two friends are at the local high school track, a circle measuring 440 yards for one complete lap. Abe can jog at 8.2 miles per hour while Bob’s jogging speed is 4.6 miles per hour. If they both start at the same point and jog in the same direction (say
asked by Bob 
english
choose two literary devices such as foreshadowing in sense ans sensibility
asked by kkkkk 
physics
A cup with refractive index n2 = 1.8 has outer radius b = 6.0 cm and inner radius a = 4.0 cm. It is filled with a liquid with refractive index n3 = 1.3. In the surrounding medium with n1 = 1.0,a ray of light travels along a trajectory that is at a
asked by Rams 
ScienceChemistry
1.)A sample of oxygen took 55 seconds to travel a certain distance. How long would it take for the same number of moles of nitrogen to travel the same distance. 2.) A sample of hydrogen gas traveled 45m in a given amount of time. An unknown gas traveled
asked by Bryan 
sciencechemistry
a bicycle tire that has a volume of 0.85L is inflated to 140 pounds per square inch. What will be the pressure in the tire if the number of moles of gas is doubled?
asked by Bryan 
physics
a 1250 kg car, rolling at 40km/h along a flat frictionless surface strikes a horizontal coiled spring and is brought to rest in a distance of 2.5m. Assuming there is no friction, what is the spring constant of the spring?
asked by amanda 
Science
A diver standing on the diving board has a mass of 89.0 kg and has a gravitational potential energy of 2.50 x 103 J. Determine how high the diver is above the water surface. (Assume the water is at ground level).Use 9.81 m/s2 as the value for gravity.
asked by JodyAnn 
chemistry
How many grams of oxygen are collected in a reaction where 245 mL of oxygen gas is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 688 torr
asked by raul 
Physics
after an ice show, Michelle helps clear the props from the ice. Standing in her skates next to a potted artifical tree, she gives it a push. The tree, which has a mass of 6500g, slides forward at a velocity of 13m/s. Michelle, with a mass of 40.0kg, slides
asked by Sarah 
economics
could you calulate the total, average variable, and average cost, when a company marginal cost of production is $5.00 per unit and fixed costs are $20.00
asked by Anonymous 
algerbra
translate the phrase into a mathematical expression and then simplify. nine times a number subtract twice the same number
asked by deb 
chemistry
balnce this equation, and show work Crl3 + KOH + Cl2> K2Cr2O7 + KIO4 + KCL + H2O
asked by cece 
Cultural
Dependency theory refers to what?
asked by Kim 
geometry
word problem can you help me: a trapezoid has an area of 4 square units, and a height of 1 unit. what are the possible whole numbers lengths for the bases? would the only whole number be; 4? im not sure how to answer this
asked by marko 
Algebra 2
If a rock is thrown upward from a height of 100 ft, with an initial velocity of 32ft/sec, solve for the time that it takes for it to hit the fround (when h=0) Round your answer to 2 decimals
asked by Billy 
Econ/stats
The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Develop a leastsquares regression line and explain what the slope of the line
asked by Ruth 
MATH
A rectangle pen for a pet is 5 feet longer than it is wide. Give possible values for the width W of the pen if its area must be between 266 and 750 square feet, inclusively. The width of the pen from the smaller value of the width is how many feet to the
asked by ANGEL 
biology
Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP? write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions. what would this type of ATP
asked by livleen 
Life Orientation
Suggest 5 recommendations on how to address the environmental problems that you have identified in the previous question
asked by Nicola 
math
if 1 centimeter on a map repesents 10 kilometers then 6cm represents how many km/
asked by Ryan 
Life Orientation
Describe the lifestyle disease cancer
asked by Nicola 
Math
What initial investment at 9% compounded semiannually for 5 years will accumulate to $15,000?
asked by Tar 
Life Orientation
Explain 5 factors that can contribute to cancer
asked by Nicola 
GEDWord Problems
If 7 3/8 pounds of peanuts, 2 1/4 pounds of walnuts, and 1 pound of pecans are divided equally to create 5 bags of mixed nuts, how much does each bag weigh?
asked by kayla 
Life Orientation
Provide 5 ways in which you critically discuss how cancer impacts on a teenager
asked by Nicola 
Life Orientation
Write a paragraph of approximately 100  150 words in which you make 5 recommendations on how to overcome the style/cancer disease behavior.
asked by Nicola 
ALGEBRA
Fill in the blanks. (Round your answers to the nearest dollar.) Interest Principal Rate Time Future Value
asked by Mike 
Life Orientation
Write a conclusion in which you explain in one paragraph what you have learn in doing this assignment on cancer and how it has changed the way in which you will view lifestyle diseases in future
asked by Nicola 
Statistics
When fifteen vehicles were observed at random for their speeds (in M.P.H.) on a freeway, the following data were obtained. 61 53 57 55 62 58 60 54 62 60 59 66 55 54 63 Suppose that from past experience it may be assumed that vehicle speed is normally
asked by Jennifer 
World War 1
In the mind of germany, what could have been some possible peace proposals so world war 1 would not have occured?
asked by Stephanie 
Chemistry
For the strong acids find the [H3O]and [OH] in a solution that is .785% HNO3 by mass (assume a density of 1.01 g/ml). If someone could offer step by step instructions, that would be terrific!
asked by Beth 
Precalc
Heres the equation: (x^2)(4y^2)(4x)+(24y)(36)=0 Your supposed to find the coordinates of the center, foci, and vertices, and the equations of the asymptotes of its graph. So first you complete the square right? (x^2 4x+4)4(y^2 +6y+9)=36+4+36
asked by Maya 
Chemistry
Calculate the cell potential for the following reaction as written at 79C given that [Zn^+2] = 0.819 M and [Ni^+2] = 0.014 M. Zn + Ni^+2 = Zn^+2 + Ni I know: E=E RT/nF ln Q reduction potential for Ni= 0.26 reduction potential for Zn = 0.76 so E standard
asked by Mima 
Life orientation
5 way in whch the human or enviromental problem impact on the community
asked by Anonymous 
Math
the formula for the surface area of a cylinder is: A=2πrh+2πr^2 If the height of the cylinder is 10 inches, and the surface area is 200 sq. inches, determine the length of the radius
asked by Nancy 
Probability and Statistics
A research psychologist believes that professional athletes tend to be more confident than the typical person. From previous testing, he knows that the scores for people in the general population are approximately normally distributed with a mean of 72 and
asked by Kim 
Economics
How is the Barter system of exchange some what arbitrary?
asked by Labz 
life orientation
a clear explanation of how your choosen topic is a human factor that may cause ill health.
asked by mellonny 
probability and statistics
An electrical firm manufactures light bulbs that have a usuable life that is normally distributed with a mean of 1000 hours and a standard deviation of 80 hours. Find the probability that a package of 4 bulbs would last at least 4400 hours.
asked by Kim 
Probability and Statistics 2
Bad Wheels Tire Company is interested in estimating the proportion of defective tires that it produces. The company tested a sample of 500 tires and found 16 to be defective. Find a 99% upper bound confidence interval for the true proportion of defective
asked by Kim 
Probability and Statistics
The ACT scores of applicants to college are approximately normally distributed with a mean of 20.3 and a standard deviation of 3.1. If a random sample of 20 applicants to college is chosen find the probability that their average ACT score will be 19 and
asked by Kim 
geometry
Write an equation for each circle if the coordiantes of the center and length of the radius are a. center(1,5) radius = 2 units b. center(0,3) radius = 7 units c. center(9,7) radius = 1/2 units
asked by lindsay 
math
Write the slopeintercept equation for the line with slope 2/5 and yintercept (0, 3) and graph the line.
asked by Yvette 
calculus
does sin(1/x) converge or diverge?
asked by inu 
psychology
Can the expression on your face produce the emotion which you would like to experience? Explain.  I believe that expression on ourface produce the emotion which we would like to experence. right? even though we are sad inside we tend to be happy. and
asked by Vince 
geometry
Find the coordiantes of the center and the radius of each circle a. (x+root5)^2 + y^2 8y =9
asked by lindsay 
statistics
an auditor wishes to test the assumption that the mean value of all accounts receivable in a given firm is $260.00 she will reject this claim only if it is clearly contradicted by the sample mean. the sample standard deviation of 36 accounts is $43, the
asked by b 
MATH
The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the
asked by ANGEL 
Algebra 2
If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) A package is thrown downward with an
asked by Kelsey 
MATH
If C dollars are deposited in an account paying r percent annual interest, the amount after x years is A+C(1+r)*. Approximate the amount in the account after x years, when C=$100.00, r=19%, and x15 years.
asked by ANGEL 
Probability and Statistics
The school superintendent would like to estimate the proportion of adults in the country that are in favor of an increased emphasis on the basics of education. A randomly selected sample of 150 adults found that 107 of them would favor an increased
asked by Kim 
chemistry
A 115 mL sample of a 10.0 M ethylene glycol (C2H6O2) solution is diluted to 1.30 L. What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.) What is the boiling point of the final solution? How would I go
asked by Jen 
pre algebra
The halflife of 234U, uranium234, is 2.52 105 yr. If 98.6% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?
asked by Anonymous 
math
there are 122 houses,how many times does the digit 2 appear on the letterboxes?
asked by don 
Programming logic
Finding the bugs. // Each time a salesperson sells a car at the Pardeeville New and Used Auto Dealership, // a record is created containing the salesperson’s name and the amount of the sale. // Sales of new and used cars are kept in separate files
asked by Alisa 
algebra
Y=3X^2+9X1 what are the x and y intercepts? Please!
asked by Anonymous 
Chemistry
How much heat is either ______(absorbed or given off) when 91.45g of HI decomposes to H2 and I2 at 25 degrees C? What goes in the blank and how much heat? Thanks!
asked by Greg 
statistics
a random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of $29.97
asked by julie 
math
there are 3 arrays for 4, how many arrays can be drawn for each prime numbers
asked by don 
spanish
Escribe el cual (la cual, los cuales, las cuales) o lo cual en el espacio. Nos invitaron a cenar con ellos, ____ fue una buena idea.
asked by david 
statistics
a random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of $29.97 a. Find a 95% confidence interval for the mean price of all summer sleeping bags. b. what is m i.e., what is the margin
asked by julie 
Historyworld war 1
In the mind of germany, what could have been some possible peace proposals so world war 1 would not have occured?
asked by Stephanie 
Probability and Statistics
The PGA would like to test to see if there is any difference in the distance produced by Titleist and Maxfli brand golf balls. A sample of 36 Titleist golf balls produced x1bar = 292ft, s1=16ft, while a sample of 48 Maxfli golf balls produced x2bar =
asked by Kim 
MATH
The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the
asked by ANGEL 
Economics
In 1000 BC, the Chinese people used Cowry shells as a method of currency. Why is this significant?
asked by Labz 
chemistry
Substance X has a molar extinction coefficient (E) of 4725 l.mol1 cm1. How many micromoles of X are needed to produce an absorbance of 1.0 in a 1 ml cuvette?
asked by tulasi 
physics
Consider a wave that travels a distance of 3 meters in 1 second with a frequency of 2 hertz. What is its amplitude? A) 4 meters.B) 2 meters.C) Not enough information is given.D) 3 meters.E) 1 meter.
asked by Kristie 
calculus
Find the area of the region enclosed by y=6x2 and y=x2+15
asked by carlton 
Probability and Statistics
The major would like to estimate the mean number of automobile crashes per day at the intersection of 2 highways. A random sample of 40 days worth of data had a mean of 4.3 crashes and a standard deviation of 0.9. How large of a sample would be needed in
asked by Kim 
calculus
Find the area enclosed between f(x)=05x2+3 and g(x)=x from x=−8 to x=3.
asked by carlton 
Manigerial Accounting
This is an extra credit assignment I was assigned that I really need the points for. I am having alot of trouble with it. I did a few of the questions but im not sure if they are right or not and I don't know how to do a few. For number 1 (Listed below)
asked by Brian 
Maths trig
Use compound angle formulae to express Second harmonic i2= sin2t and the the third harmonic i3=sin3t in terms of the first harmonic sint
asked by Stephan pultree 
statistics
A widget factory's worker productivity is normally distributed. one worker produces an average of 75 widgets per day with a standard deviation of 20. another worker produces at an average rate of 65 per day with standard deviation of 21. 1)what is the
asked by Anonymous 
Chemistry  Kp
What is the Kp for the following reaction: 2NH3(g) > N2(g) + 3H2(g) This reaction is contained in 1.0 L container at 1,000 K and has reached equilibrium. (Kc = 4.0 x 10^2). You have initially added 1,220 moles of NH3(g) in the flask.
asked by Addyson 
calculus
Find the volume of the solid formed by rotating the region enclosed by y=e2x+1y=0x=0x=09 about the yaxis.
asked by carlton 
Precalc
Heres the equation y^2 4x^2 +8x=20 For the center i got (1,0) For the vertices i got (1,4), (1,4), (1,0), (3,0) And how do you find the foci?
asked by Maya 
english essays
Need help to proofread essay...
asked by cj 
Economics
You bought the bond for $1,040, after 6 months you received a coupon of $35 and after another 6 months you received another $35 coupon and you sold the bond for $1,070. What would be your total dollar return in that case? What would be your total
asked by Sarah 
biology
In some dogs, long hair (L) is dominat over short hair (l), and wavy hair (W) is dominant over straight hair(w). Draw a cross between a dog that is homozygous for long hair and straight hair with a dog that is homozygous for short hair and wavy hair. What
asked by Webdy 
math
each bead has a value according to its color how do you finnd the value of the beads
asked by dorothy 
ALGEBRA
A car dealer will sell you a used car for $8,734 with $734 down and payments of $384.67 per month for 24 months. What is the simple interest rate? (Round each answer to the nearest tenth.)
asked by Mike 
physics
an object of mass 0.1kg is rotated in a horizontal circle by a string 1m long. the maximum tension in the string before it breaks is 50N.what is its maximum frequency reached?
asked by ridhi 
Bio anatomy
How can i describe in like 1 or two sentences "visual image processing" without using those three words. I am finding this really hard. Thanks!
asked by Nicole 
physics
Frequency and period are related, in that they are which of the following?A) inverses of each other.B) None of these.C) both on the same wavelength.D) directly proportional to each other.E) two expressions for much the same thing.
asked by Kristie 
algebra
laurie can bike to work in 3/4 hour.when she takes the bus, the trip takes 1/4 hour. if the bus travels 20 mph faster than laurie rides her bike, how many miles is it to her workplace?
asked by Anonymous 
Math
a cylinder has a radius of r and a height of h. A rectangular box has a length of r, a width of h and height of h. Their combined volume is V=πr^2h+h^2r If their combined volume is 600 cubic inches and h is 5 inches, solve for the radius(r).
asked by Nancy 
social studies
Why is the Rosetta Stone important..?
asked by T 
chemistry
a 1.00g sample of water is allowed to vaporize completely in a 10.0L container. What is the pressure of the water vapor at 150 degrees celsius?
asked by carter 
Programming Logic
Find bugs. // The two senior class homerooms at Littleville High School // are having a fundraising drive for the prom. Each time a student // solicits a contribution, a record is created with the // student's name and the value. Two files have been
asked by Tina 
physics
A sonic boom is produced by an aircraft when it does which of the following? A) flies faster than sound continuously.B) None of these.C) All of these.D) first exceeds the speed of sound and breaks the sound barrier.E) pulls out of a subsonic dive.
asked by Kristie 
chemistry
Calculate the theoretical pH when 5.00 ml of 0.0100 M HCl is added to 30.00 mL of deionized water.
asked by vivian 
statistics
1. Using the population figure (N of Cases) which is 45,000 compute the proportion of population members that died during 2007 if there were 4000 deaths during that year. Produce the answer rounded off or preset to include 3 decimal places. 2. Using the
asked by Anonymous 
chemistry 101
The enthalpy change was determined for the following reactions; Ca (s) + CO2 (g) + ½ O2 (g ) → CaCO3 (s) ΔH = 812.8 kJ/mo l Ca (s) + ½ O2 (g) → CaO (s) ΔH = 634.9 kJ/mo l What is the enthalpy change for the following reaction? CaCO3 (s) → CaO
asked by Anonymous 
Probability and Statistics
A marine biologist has determined that the weight of a full weight of 2000pounds and a standard deviation of 500 pounds. Determine the probability that the average weight of the next five sharks captured will be less than 2100lbs.
asked by Kim 
Honors Trig.
A plane is flying at a speed and direction of 550 mph, 25 degrees north of west. There is a wind of 28 mph, at an angle of 19 degrees south of the east direction. How fast is the plane actually flying? What direction is the plane traveling?
asked by Ashley 
owens cc
what is the realationship between promotion and sale promotion
asked by lana Harvey 
python programming
Explain in python programming (x^n1)/(x1) = x^(n1)+x^(n2)+...+x+1
asked by Kim 
statistics
do you want to own your won candy store? start up costs (units in 1,000) for a random sample of candy stores are: (95, 173, 129, 95, 75, 94, 116, 100, 85) Use an 80% confidence interval to test the null hypothesis that the mean start up cost is 118.
asked by emily 
Chemistry
What is the pH of the solution created by combining 12.30 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH:12.30 pH w/ HCl _________ pH w/ HC2H3O2 _________ What are the pH values if you take
asked by HELP!! 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked by Jer 
ALGEBRA
Convert the following credit card rate to the APR. Oregon, 1 3/4% per month
asked by Mike 
Chemistry
What is the pH of the solution created by combining 12.30 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH:12.30 pH w/ HCl _________ pH w/ HC2H3O2 _________ What are the pH values if you take
asked by HELP!! 
life orientation
Describe the environmental problem flooding
asked by Patience 
Rational Forms
List all the possible rational zeros of f(x)=3x^3x^2+2x=2. Please help me. I don't understand how to do this. Can someone show me please.
asked by Tabby 
Chemistry
Will 1propanol and 1butanol form an ideal solution?
asked by Sinmei 
(Psychology)
Can someone rephrase this!?!?!? Discuss the biological consequences of stress as outlined by psychoneuroimmunologists.
asked by Jinu 
uniben
A rubber ball is dropped from a height of 10meters,suppose it rebounds onehalf the distance after each fall.find the total distance the ball travels before coming to rest.
asked by wilfred 
life orientation
five ways in which human or environmental problems imapacts on community.
asked by lesego 
Physics
Tom Brady (the Patriots’ quarterback) throws a football – at a speed of 30 mph at an angle of 50 degrees to the horizontal – toward an intended receiver 20 yd straight downfield behind the goalline. The pass is released 7.5 ft above the ground.
asked by Bob 
physics
what force must the woman in Figure 3.38 exert on the floor with her hands in order to do a pushup?
asked by Anonymous 
Chemistry
Cadmium and a solution of cadmium(II) nitrate are used with tin and a solution of tin(II) nitrate to construct a galvanic cell. 1) The reaction run initially at standard state with 100mL samples of each solution is allowed to proceed until 8.0 g of tin
asked by chamy 
Chemistry(Please respond)
A 23.9 mL sample of 0.283 M trimethylamine, (CH3)3N, is titrated with 0.207 M hydrochloric acid. At the equivalence point, the pH is? I started off by doing 0.283 X 2.39e2 = 6.76e3 Then I did 6.76e3 / 0.207 = 3.36e2 2.39e2 + 3.36e2 = 5.65e2
asked by Hannah 
ALGEBRA
Suppose an insurance agent offers you a policy that will provide you with a yearly income of $290,000 in 25 years. What is the comparable annual salary today, assuming an inflation rate of 4%?. (Round your answer to the nearest cent.)
asked by Mike 
biology
how does the REM help create a sleep signal sent from the pons in the brain that helps to stop motor neurons in the spine when a person sleeps. Please help me! I am looking for detailed information right down to the certain proteins and such! I have
asked by Matt 
Math
1)Use the definitions sin0(theta) = y/r, cos0(theta) = x/r and/or tan0(theta) = y/x to prove that cot0(theta) = 1/tan0(theta) 2)For all 0(theta) prove: a)cos(t) = 1/sec0(theta) b. sec(t) = 1/cos0(theta)
asked by abeer 
physics
how much must a car produce to drive 150 km if an average force of 500 N must be maintained to overcome friction?
asked by Anonymous 
math aig
Tyrone rounded 23.94 to 24.How did he round? A to the nearest hundredth B to the nearest tenth C to the nearest one D to the nearest ten my answer is c am i right.
asked by lidia 
chemistry
if 180 grams of ice at 123 degrees celsius is heated to steam at 125 degrees celsius, how much energy would it take?
asked by Anonymous 
life orientation
Identify and describe one environmental problem that causes ill health,accidents,crises and disasters within your community or any other community within South Africa or globally?
asked by tumi 
Algrbra 1
(d+7)^2=0
asked by Makenzie 
critical thinking
Homework Help: critical thinking Posted by long on Thursday, March 8, 2012 at 1:53pm. Read the scenario. Using the information provided in the references and lesson, arrive with your best possible solution. You are a squad leader in Sapper platoon, Special
asked by derrick 
ALGEBRA
Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) $300 balance, 18% rate, $250
asked by Mike 
physics
Two projectiles A and B are projected at the same time in the same vertical plane. A is projected at a height of 2m above the ground making an angle of 30deg with the horizontal. B is projected with the velocity of 20m/s at an angle of 60deg with the
asked by ridhi 
statistics
if the null hypothesis is that the mean is 3218, the alternative hypothesis is that the mean > 3228, and the sample mean is x= 3342, the sample standard deviation is s=287, the sample size is n= 42, and α= 0.01 a. calculate the z test statistic. b. what
asked by emily 
Freshman English
Can someone summarize To Kill a Mockingbird for me? I still don't get it.
asked by Makenzie 
projectiles
two children ride bicycle towards each other with instant velocity of 20m/s and 10m/s. Each child releases a ball 6m above the ground with forward horizontal velocity of 40m/s relative to the bicycle. if the two balls collide in above the ground. what was
asked by ridhi 
ALGEBRA
If $835 is invested in an account that earns annual interest of 4.5%, compounded semiannually, what will the account balance be after 13 years? (Round your answer to the nearest cent.)
asked by Mike 
Mechanics M1
Q.1 Find the force needed to accelerate a 2 kg block at 3m/s^2 up a rough plane (coefficient of friction 0.2) inclined at 25 degree to the horizontal if the force is a) Parallel to the slope b) horizontal c) at 45 degree to the upward verticle
asked by Jat 
physics
a book having a mass of 1.3kg lies on a shelf 1.8 m above the floors in a room whose ceiling is 2.5 m high. What is the books gravitational energy relative to the floor?
asked by Jen 
Life orientation
How does water ppllution cause ill health,accidents,crises,and disaster within our community or globally
asked by Khululekile 
math
there are 122 houses eacg has number on letter box ,how many times does the digit 2 appear on the letter boxes?
asked by chantelle 
math
how t express 3X3X3X8 in index notation
asked by linda 
Discrete Mathematics (computer science)
Find a formula for the nth term of the recurrence K(n) = 13.5K(n – 1) – 2.7 with K(0) = 5.
asked by Aydin 
Chemistry
A 0.5224g sample of an unknown monoprotic acid was titrated with 0.0998M of NaOH. The equivalence point of the titration occurs at 23.82 mL. Determine the molar mass of the unknown acid.
asked by Confused 
Life orientation
list five ways in which the human or environmental problem impacts on the community.
asked by Talakgale Lucas 
ALGEBRA
If $695 is invested in an account that earns 21.75%, compounded annually, what will the account balance be after 15 years? (Round your answer to the nearest cent.)
asked by Mike 
physics
Rank the speed of sound through the following from greatest to least:A. HeliumB. Benzene C. Mercury
asked by Kristie 
chemistry
a salt solution is evaporated to dryness. If 25.7 g of the solution leaves 1,949 mg of dry salt, what is the percent concentration (w/w) of the salt in the solution
asked by Randy 
Mechanics (M1) A level?
A block moves on a rough slope of length 10 m inclined at 30 degrees to the horizontal. The coefficiebt of friction between the block and the slope is 0.4. The block starts from rest at the top of the slope. a) Find the speed at which the block reaches the
asked by Jat 
ALGEBRA
If $835 is invested in an account that earns annual interest of 4.5%, compounded semiannually, what will the account balance be after 13 years? (Round your answer to the nearest cent.)
asked by Mike 
sciencechemistry
please anwser soon, a rigid 4.10L flask contains a mixture of 1.25 moles of H2, 0.250 mole of O2, and sufficient Ar so that the partial pressure of Ar in the flask is 1.00 atm. The temperature is 63.5 degrees C A) Calculate the total pressure in the flask
asked by Bryan 
chemistry
calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)
asked by Randy 
physics
A transparent cube with index of refraction n = 1.6 and side length a = 4.0 cm is free to rotate about an axis passing through its center. A laser beam is aimed at the cube. After passing through the cube the beam hits a screen on the other side forming a
asked by Rams 
maath
there are 3 arrays for 4.how many arrays can be drawn for each prime numbers
asked by don 
chemistry
How many moles of Ca(NO3)2 are needed to make 0.250 liters of a 0.200 M Calcium nitrate solution?
asked by AJ 
chemistry
how many moles of sodium chloride are in 937 mL of a 1.88 M solution of sodium chloride?
asked by Randy 
Life orientation
In 1015 line critically descuss five ways in which the human or inveronment problem impect on south africa
asked by Mbulaheni lufuno 
Finance
Hetfield and Ulrich, Inc., has an odd dividend policy. The company has just paid a dividend of $7 per share and has announced that it will increase the dividend by $5 per share for each of the next 4 years, and then never pay another dividend. If you
asked by T 
Physics Final exam help
A proton with kinetic energy 100 keV is moving in a plane perpindicular to a uniform magnetic field of magnitude 2.3 T. Find the radius of its orbit. Not sure what equation to use or how to solve.
asked by Tim 
Life orientation
Describe the life styele cancer and explain factors that contribute to the cancer
asked by Lindy 
life orientation
critically discuss 8ways in which the environmental problem impacts on your community within south africa or globally.(16)
asked by tumi 
finite math
3. The campus radio station WVAS surveyed 190 students to determine the types of music they liked. The survey revealed that 114 liked rock, 50 liked jazz, and 41 likes blues. Moreover, 14 liked rock and jazz, 15 liked rock and blues, 11 liked blues and
asked by cjones 
life orientation
suggest 5 recommendation on how to adress the environmental problem that you have identified in the previous question
asked by tumi 
finite math
2. The Witherspoon Down Company specializes in making down jackets, ski vests, and comforters. The requirements for down and labor and the profits earned are given in the following chart: Down (pounds) Time (laborhours) Profit ($) Jacket 3 2 6 Vest1 2 1 6
asked by cjones 
finite
1. Alabama State University’s Bookstore has determined that the supply function for a certain author’s newest book is p = (1/300)q + 13. The demand function for this book is p = .03q + 19. Graph both demand and supply functions on the same set of
asked by cjones 
British Literature
John Ruskin illustrates a direct correlation between the decline in morality and the pollution visible in his world in “The Storm Cloud of the Nineteenth Century.” Illustrate this principle in action by utilizing between two and four of the texts we
asked by Chelsea 
geometry
Find the coordinates of the center and the radius of a circle with and equation of: a. x^2 + 2root7x +7 + (Yroot 11)^2 =11 b. x^2 12x + 84 =y^2 + 16y
asked by lindsay 
psychology
Discuss the biological consequences of stress as outlined by psychoneuroimmunologists. thank you
asked by Jinu 
Calculus 3
find the curvature of r(t) = at the point (1,0,0)
asked by MAXIUM 
chemistry
The combustion of propane is given by the following reaction: C3H8 (g) + 5 O2 (g) > 3 CO2 (g) + 4 H2O (g) If 5.00 L of propane are burned in in the presence of excess O2, how many liters of carbon dioxide will be formed?
asked by zarmeen 
Algebra
a farmer wants to enclose a rectangle garden using the sides of her barn as one side of the rectangle. what is the maximum area which she can enclose with 60ft of fence? what should the dimensions of the garden be to give this area? Max area which she can
asked by ShelbyA 
Chemistry(Please help)
Calculate the concentration of HCO3 in an aqueous solution of 0.0885 M carbonic acid, H2CO3 (aq). I was going to set this up as 0.0885 x = ? Am I suppose to use the Ka value for carbonic acid?
asked by Hannah 
Help W/ Definite Integrals
Evaluate the definite integral of (4x^3x^2+2) from 5 to 2. Can someone please explain what I'm being asked to do? My book is not clear on this concept.
asked by Tabby 
Math Urgent!!!
List all the possible rational zeros of f(x)=3x^3x^2+2x=2. Please help me. I don't understand how to do this. Can someone show me please.
asked by Tabby 
chemistry
How can you prevent or stop eutrophication
asked by precious 
no
Mendez invested Dhs  cash and Equipments  in the business. 4 Purchased land costing Dhs  for cash. 8 Incurred advertising expense of Dhs  on account. 11 Paid salaries to
asked by medo 
Algebra/still clueless
The length of a triangle is twice the width. The area is 2yd^2. Please, find length and width and simplify. Should I convert the yards? :)
asked by ShelbyA 
Algebra
4x+12(x1)= 4(x4)
asked by David 
Geography Help??
show how society and family life compare and contrast in the Pacific Rim? I don't need an answer, just an explanation please. I don't know what that means..
asked by Lauren 
Algebra 2
A package with square ends has combined length and girth(girth is perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of the package. s in. * s in.* l in. One solution is: 11.08in. *
asked by Nancy 
Life Direction
three parts of Life Direction
asked by Anonymous 
math
Given A = {5, 6, 7}, B = {3, 4, 5, 6}, and C = { 4, 5, 6, 7}. Evaluate each set A ¿ B b) A U C c) B U C d) (A U B) ¿ C e) A U (B U C) f) (A ¿ B) ¿ C g) (A ¿ B) U C
asked by seeq 
math
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=0, y= \cos(x), x = \frac{\pi}{2}, x = 0 about the axis y= 3 You might need to use the identity: cos^2(x) = \frac{1}{2}(cos(2x) + 1).
asked by hamlet 
math
Find the equation for the surface formed by rotating (x = 3*cos(y)) about the y axis. Your answer must not contain radical symbols (square root signs).
asked by hamlet 
Chemistry
50.0mL of 0.01M Ba(OH)2 is added to 150.0mL of 0.01M HNO3. What is the new pH of the solution?
asked by Zac 
math
Find the equation for the surface formed by rotating (x = 3*cos(y)) about the y axis. Your answer must not contain radical symbols (square root signs).
asked by hamlet 
math
Suppose that z(x,y) may be defined implicitly by {x}^2  {y}^2 {z}^2 = 16, enter inequalities for the domain (x and y values) and the range (z values).
asked by hamlet 
Grade 8 Math
Can you write them in Mathematical/numbers form I'll solve them myself. i don't really get it though i have written the first one in mathematical for but i'm not sure if that's right. 1. When six is subtracted from five times a certain number, the result
asked by Caroline Sunshine 
science
how can concentration of Cl in mixture of two chlorides be calculated given concentration of the chlorides
asked by thabo mokgole 
Chemistry
Calculate the concentration of H+(aq) and the concentration of OH(aq) for the following solution with the following pH at 298K showing all your working. pH = 3.20
asked by JJ 
Algebra
Determine the comparable interest rate for a $60,000 loan when the quoted information is 10.7% + 0.5 pt + $200. (Round your answer to two decimal places.
asked by Tosha 
Calculus
Consider the area between the graphs x+1y=12 and x+8=y2 . This area can be computed in two different ways using integrals First of all it can be computed as a sum of two integrals Interval a to b f(x)= i put 12x but it's wrong Interval c to b f(x)= i put
asked by jasmineT 
physics please help
Worldclass sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude 15m/s^2 . Part a)How much horizontal force F must a sprinter of mass 60kg exert on the starting blocks to produce this
asked by Emma 
Physics
a 1.5kg cannon is mounted on top of a 2.0kg cart and loaded with a 52.7 gram ball. The cannon, car, and ball are moving forward with a speed of 1.27m/s. The cannon is ignited and launches a 52.7 gram ball forward with a speed of 75m/s. Determine the
asked by Sarah 
geometry
What is the formular for the exterior angle of a regular polygon
asked by Salawu 
ALGEBRA. PLEASE HELP ME.
Point N is on hypotenuse BC of triangle ABC such than angle CAN is 45 degrees. If AC=8 and AB=6, find AN.
asked by My Name Is Bob 
geometry
in segment pt, l is the midpoint of pa and a is the midpoint of pn. if pn = 17 and la = 3.5, what is the length of nt?
asked by Corey 
Physics
Philadelphia Flyers player Mike Richards stands on the frictionless ice next to the goal. Neither Mike nor the goal are anchored to the ice. Frustrated after a recent playoff loss, 102.5kg Mike suddenly pushes on the goal, sending it across the ice a
asked by Sarah 
economics
could you calulate the total, average variable, and average cost, when a company marginal cost of production is $5.00 per unit and fixed costs are $20.00
asked by Anonymous 
Physics
In an unusual return to space, Astronaut Sally Ride is conducting repair work on the Hubble Space telescope. She throws a hammer of mass 500.0g forward at 20.0m/s. The astronaut, mass 80.0kg, recoils in the opposite direction. What is Sally's recoil
asked by Sarah 
physics
Frequency and period are related, in that they are which of the following?A) inverses of each other.B) None of these.C) both on the same wavelength.D) directly proportional to each other.E) two expressions for much the same thing.
asked by Kristie 
physics please help
Question #1 A 0.140kg baseball traveling 30.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 14.0cm . What was the magnitude of the average force applied by the ball on the glove? question #2 How much tension must a
asked by emma 
Physics
The mass of a rocket car plus fuel is 2,000kg. The rocket car starts from rest. The engine expels fuel(in the form of exhaust) over a period of 8 seconds. The exhaust has a velocity of 1,000m/s due west, and the velocity of the rocket car after 8 seconds
asked by Sarah 
economics
Give a numerical example to show that a monopolist's marginal revenue can be upwardsloping over part of its range. Hint: The price on the demand curve is the producer's average revenue
asked by dee dee 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked by Jer 
Life orientation
Provide recommendations on how to address the human orenvironmental problem that you identified in the previous question.
asked by Anonymous 
life orientation
explain 5 factors that contribute to the substance abuse
asked by karabo 
Physics Final exam review
A proton with kinetic energy 100 keV is moving in a plane perpindicular to a uniform magnetic field of magnitude 2.3 T. Find the radius of its orbit. Not sure what equation to use or how to solve
asked by Tim 
economics
find the uniform price if there is two customers: Type A who will only pay 10.00 dollars for a single unit of the good, and Type B who will only pay 8.00 dollars for a single unit of goods. There is 100 customers of Type A and 50 of the customers of Type
asked by cupcake 
physics
Beats in sound are the result of which of the follwing wave? A) resonance.B) refraction.C) reflections.D) amplitude changes.E) interference
asked by Kristie 
Science
Vanessa pushes a box with 50 N of force. The box accelerates 2 m/s2 for 10 seconds. What is the mass of the box?
asked by Jessica 
economics
Give a numerical example to show that a monopolist's marginal revenue can be upwardsloping over part of its range. Hint: The price on the demand curve is the producer's average revenue
asked by dee dee 
Probability and Statistics 2
The numbers below represents heights (in feet) of 3year old elm trees, where leaves represent fractional parts of each value. Stems Leaves 5 1,8 6 1,2,4,7,8,9 7 0,2,3,3,4,5 8 1,1,2,3,5,6,6,7,7,9,9 9 0,1,3,4 a) Find the five number summary for the given
asked by Kim 
Math
Solve and please explain how you arrived at your ans: square of 3x1=2
asked by Kadesha 
stats
suppose that the wait time at the bank is uniformly distributed in the interval 4min8min find the probability that a randomly selected customer has to wait longer than 6.5 minutes
asked by zuly 
algebra
Write an equation of the hyperbola with foci (0, ) and (0, 2) and vertices of (0, ) and (0, 1).
asked by david 
Probability and Statistics 2
The University of Southern Mississippi currently uses GE brad fluorescent light bulbs that have a mean life of 900 hours. Sylvania clams that its new fluorescent bulbs, that cost the same as the GE bulbs, last longer than the GE brand. A sample of 50
asked by Kim 
Homework
The formula for the volume of a cylinder is: V=πr^2*h If the volume is 432 cubic inches and the height is 8 inches, solve for the length of the radius. Round answer to 2 decimals.
asked by Kelsey 
Probability and Statistics 2
Minute Maid orange juice company claims that 25% or more of all orange juice drinkers prefer its product. To try to disprove the validity of this claim, Tropicana orange juice company sample 200 orange juice drinkers and found that 41 prefer the Minute
asked by Kim 
physics
Is it true that all radio waves are faster than all sound waves—no exceptions? A) False always.B) True, in most common cases.C) False in some cases.D) True in all cases.
asked by Kristie 
Chemisty (please read soon)
which will become a buffer in 1L of H2O? a) 0.3 mole KOH & 0.3 mole HBr b) 0.5 mole NH3 & 0.5 mole HCl c) 0.2 mole NaCl & 0.3 mole HCl d) 0.2 mole NaOH & 0.2 mole HBr e) 0.4 mole HC2H3O2 & 0.2 mole NaOH I think that the answer is e. Is that correct?
asked by Zac 
Cultural Anthropology
what is Factory industrialism?
asked by Kim 
Math
Solve for x: x^2 2x4=0
asked by Devon 
trig
a 6 foot tall man is standing near a tree on level ground .if the man shadow 4 feet long .how many feet tall is the tree?
asked by diamond 
Economics/History
What trend did Johan Palmstruch start in Europe? How successful was this trend?
asked by Labz 
geometry
if you know the area of a parrallelogram is 45.0 square feet and the base is 10.o feet, how can you find the height? Explain your method and then solve the question.
asked by Danny Boo hoo 
math
the probability of havingtype O blood is 1/2 and the probablity if having type A blood is 1/4. what is the probablity of a person having either typr O blood or type A blood ?
asked by Anonymous 
statistics
A sociologist is studying marriage customs in a rural community in Denmark to determine the age of the woman at the time of her first marriage. the sample standard deviation of these ages was 2.3 years. The sociologist wants to estimate the population mean
asked by Anonymous 
life orientation
Ways in which the human or environmenta l problem impact on the community
asked by vicky 
Chemistry
0.200 moles of NaF are added to 1L 2.0 molar HF. What is the pH? a) 2.14 b) 6.70 c) 10.80 d) 3.00 e) 7.00
asked by Zac 
math
A geometric series with the first term 7 converges to 70. What does the common ratio equal? What does the second partial sum equal?
asked by Jim 
Stats
Consider the following Hypotheses test: Ho:m>=80 Ha:m
asked by bobbie 
Chem (please read soon)
50.0mL of 0.1 molar NaOH is added with 50.0mL of 0.1 molar CH3COOH. The Ka = 1.8*10^5. what is the pH of the solution? a) 7.00 b) 9.22 c) 4.77 d) 8.22 e) 5.78 I think that the answer is d. Would i be safe in saying that?
asked by Zac 
English
What effect do drugs, dangerous weapons and bullying have on schooling and education?
asked by Anelisa 
Chemistry
0.200 moles of NaF are added to 1L 2.0 molar HF. The Ka = 7.2*10^4. What is the pH? a) 2.14 b) 6.70 c) 10.80 d) 3.00 e) 7.00 I got 4.14. pH = log(Ka)log([NaF]/[HF]) ==> pH = log(7.2*10^4)log(.2/2) ==> pH = 4.14 Or did I do something wrong?
asked by Zac 
physics
A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it de cays into an particle of mass 6.64×10−27 kg and 234Th nucleus of mass 3.88 × 10−25 kg, and the decay process itself is extremely fast (it takes about
asked by kate 
geometry
i have to find the area of an irregular polygon how can i draw a picture to send you to show you? is this possible?
asked by marko 
Algebra 2
Coffee Express sells three drinks lattes mochas and cappuccinos. Each latte has 3 ounces of espresso and 13 ounces of milk. Each mocha has 3 ounces of espresso 11 ounces of milk and 2 ounces of chocolate syruo. Each cappuccino had 5 ounces of espresso and
asked by Anonymous 
life orientation
a clear explanation on human factors that may cause ill health,accident,crises or disaster on drug addiction
asked by vinoliah 
@elena
thank you so much help with the problem. i have trouble solving part b of the problem you helped me with. it told me to give it as a percentage, I got 10% but it is wrong. can you please help me Superman must stop a 190km/h train in 180m to keep it from
asked by john 
statistics
an auditor wishes to test the assumption that the mean value of all accounts receivable in a given firm is $260.00. She will reject this claim on ly if it is clearly contradicted by the sample mean. the sample deviation of 36 accounts is $43, the sample
asked by Anonymous 
Intermediate Algebra
The magnitude of an earthquake on the Richter scale is given by the formula R=log I, where I is the number of times more intense the quake is than the smallest measurable activity. How many times more intense i an earthquake having a richter scale number
asked by Sarahh 
Maths and science
How drug addiction is a human factor that causes ill health, accidents crises or disasters
asked by Themba N 
English
What effect do drugs,dangerous weapons and bullying have on schooling and education
asked by Mongikazi 
Life Orientation
How drug addiction is a human factor that causes ill health, accidents crises or disasters
asked by Themba N 
English Parallelism
I need help with parallelism i need to rewrite these sentences. 1. Because of prejudice in the corporation, not only did he leave but also sued for two million dollars; he did not win the case in court. 2. Since he wanted neither to get a ticket nor bother
asked by Courtney 
CBSE
How much heat must be removed to change 75.0 grams of water at 25.0 C to ice at 35.0 C?
asked by tulasi 
Chemistry
This volume of base and its corresponding pH is known as the______
asked by Jane 
chemistry
Explain why Na2CO3 (stop solution) inhibits galactosidase activity.
asked by tulasi 
english
what point about technology was Ayn Rand making by portraying such a primative future, and how do the events of the story establish that point?
asked by Michelle 
Desktop publishingElements of Design
Well i took this test and failed. This is the last test and i graduate. I posted [my answers] to the ones i think are right. 1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type
asked by Caralynn93 
English
Bullying is comprised of direct behaviors such as teasing,taunting,threatening and stealing
asked by Anelisa 
physics
The feature that our eyes are most sensitive to seeing is which of the following? A) edges or boundaries.B) images that fall on the blind spot.C) gray areas.D) anything at the periphery.E) all light of moderate intensity.
asked by Kristie 
statistics
For a normal distribution with a mean of 140 and a standard deviation of 55 find each value requested. a. What is the minimum score needed to be in the bottom 10% of the distribution? b. What scores form the boundaries for the middle 75% of the
asked by tammy 
Chemistry
What is the [CrO4] in a 2.5 L saturated solution of lead (II) chromate to which 0.05 mol Pb(NO3)2 is added?
asked by Josh 
statistics
You are designing a study to determine whether music has an effect on learning. Previous research indicates that the standard deviation to learn a task is 3.4 minutes. How many subjects would you need to ensure with 90% confidence that the estimate is
asked by tammy 
math
lim x>pi/4 tanx  cotx / x  pi/4
asked by carla 
physics
Describe the operation of electrons in a conductor
asked by Esther 
Life Orientation
Ways in which Air pollution impact on the community
asked by Jane 
Computer science
A. Given a = 5, b = 1, x = 10, and y = 5, create a program that outputs the result of the formula f = (a b)(x y) using a single printf() function. B. Create a program that uses the same formula above to output the result; this time, however, prompt the
asked by Bettie 
precalculus
a rectangular piece of cardboard measuring 14 inches by 27 inches is to be made into a box with an open top by cutting squares of equal size from each corner and golding up the sides . let x represent the length of a side of each square. for what value of
asked by kim 
Algebra
x2  5x + 5 = 0
asked by Tanya 
GEDWord Problems
Ms. Niemeyer is taking the train 3,240 miles to Oregon. She will travel 1/8 the distance the first day and 1/6 the distance the second day. How far will she have left to go after two days?
asked by kayla 
Biology
True or false? (if false, replace word in *here*) 1) The random changes of allele frequencies associated with genetic drift frequently lead to a *gain* in genetic diverse. 2) *sexual selection* helps maintain the Hb^a/Hb^s heterozygous conditions in
asked by Max 
Chemistry
Please check a Nernst equation for me? Calculate the cell potential for the following reaction as written at 61 °C, given that [Zn2 ] = 0.800 M and [Fe2 ] = 0.0170 M. Half reactions: Zn>Zn^2+ + 2e^ (potential= 0.76)(anode) Fe^2+ + 2e^ >Fe
asked by Miaow 
Life Orientation
Identify and describe one environmental problem that causes ill health, accidents, crises and disasters within our community or any other community in South Africa
asked by Nicola 
algebra 2
Coffee Express sells three drinks lattes mochas and cappuccinos. Each latte has 3 ounces of espresso and 13 ounces of milk. Each mocha has 3 ounces of espresso 11 ounces of milk and 2 ounces of chocolate syruo. Each cappuccino had 5 ounces of espresso and
asked by Anonymous