Questions Asked on
May 10, 2015

Stats
Makers of a new painrelieving medication claim that it relieves chronic pain faster than the current topselling pain reliever on the market. A doubleblind experiment was conducted in which 10 people who experience chronic pain were randomly selected to
asked by Serena 
Chemistry
A Balanced equation to represent the reaction between 1pentanol and ethanoic acid. (Production of an ester)
asked by Shantel 
Math
Which set of best describes the numbers used on a scale for a standard thermometer? A.whole numbers B.rational numbers C.real numbers D.integers I choose Real Numbers if I am incorrect can you explain why.
asked by Olivia 
Life orientation
Describe the human rights violation that is taking place in your community or in the neighboring community.Give position on this issue.
asked by Teboho 
LIFE ORIANTATION
DESCRIBE THE XENOPHOBIA VIOLATION THAT IS TAKING PLACE IN THE COMMUNITIES,ALSO GIVE YOUR OWN POSITION ON THIS ISSUE?
asked by NKOSANA NHLAPO 
life orientation
evaluate the extent to which the service delivery protest you have described in 2 above met or did not meet with processes that you have research end in 3 above
asked by Anonymous 
life orintation
TOPIC:campaign with responsibility CRITICAL FOR MARKS (A)introduction (3marks) (B) description of recent service delivery protest (5marks ) (C)research on processes of campaigns and protests (20 marks) (D)evaluation of current protests (20marks) (E)
asked by Aaron 
Maths
A village R is 10km from a point P on a bearing 025 from P. Another village A is 6km from P on a bearing 162. Calculate the distance of R from A
asked by DollyP 
chemistry
What salt results from the neutralization of phosphoric acid with potassium hydroxide? Would you set up an equation here?
asked by Student101 
life oriantation
in about one page describe a recent service delivery protest in your community or in the neighbourhood. What are the problems that the community faced? What did the community members do before the protest? Explain how the protest was conducted by the
asked by lerato 
math
A particle moves along the xaxis with position function s(t) = esin(x). How many times in the interval [0, 2π] is the velocity equal to 0?
asked by Anonymous 
Math to hard please help
The function rule C= 10n+26 relates the number of people n who attend a small concert to the cost in dollars C of the concert. Make a table of the input/output pairs to show the cost if 27,39, and 43 people attend.
asked by stupid at math 
math
While building a snowman, a large snowball is created at the rate of 5 inches per hour. How fast is the volume of the snowball changing at the instant the snowball has a radius of 10 inches?
asked by Anonymous 
Trigonometry
Use the trigonometric subtraction formula for sine to verify this identity: sin((π / 2) – x) = cos x
asked by Tim 
Physics
Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of
asked by Brian 
Geometry
The figure below represents an oval shaped track. the rounded portion of the track are semicircles. If you were to run one lap of this track, how far would you run? Pic: LONG OVAL, THE WHOLE LENGTH IS 106 FT. THERE ARE TWO LINES NEAR THE OPPOSITE ENDS
asked by Anonymous 
economic
colgate is one firm of many in the market for toothpaste, which is in long run equilibrium. a) draw diagram showing colgate's demand curve, MR curve, ATC curve and MC curve. label colgate profit maximizing output and price
asked by wan 
trig
a vertical pole 35 feet high, standing on sloping ground, is braced by a wire which extends from the top of the pole to a point on the ground 25 feet from the foot of the pole. If the pole subtends an angle of 30 degree at the point where the wire reaches
asked by thrish 
Physics
A girl swings on a playground swing in such a way that at her highest point she is 4.1 m from the ground, while at her lowest point she is 0.8 m from the ground.What is her maximum speed? The acceleration due to gravity is 9.8 m/s2 .Answer in units of m/s.
asked by Anonymous 
physics
A bar of gold measures 0.15 m × 0.050 m × 0.050 m. How many gallons of water have the same mass as this bar?
asked by Anonymous 
timpany
a Ray of light makes an angle of 10 with the horizontal and strikes a plane mirror which is inclined at angle x to the horizontal . The angle x for which the reflected Ray becomes vertical is?
asked by Shall I 
Trig
A ladder 35.4 feet long is leaning against an embarkment inclined 62.5 degrees to the horizontal. If the bottom of the ladder is 10.2 feet from the embarkment, what is the distance from the top of the ladder down the embarkment to the ground?
asked by thrish 
Art Ms. Sue?? Writeacher??
Illuminated letters sent a visual message that communicated the content of the text. Which portion of the fifteenthcentury population benefited most from illuminated letters? the wealthy the monks the scholars the illiterate*** Thank you for your
asked by Amy 
Physics
two stars with equal mass of 4.0x10^15 kg are separated by a distance of 2 km. They are moving in circular obits around the middle between the two stars. What is the speed of the stars?
asked by Ricky 
Trigonometry
Can you show steps on deriving the identity from the sum and difference formulas for cosine: sin a sin b = (1 / 2)[cos(a – b) – cos(a + b)]
asked by Tim 
Chemistry
A student was asked to prepare a sample of copper(ii)sulphate crystals(CUSO4.5H2O) given 5g of of copper (ii)oxide (CUO) as the starting material.if 10g of dry crystals of CUSO4.5H2O were obtained,calculate the percentage yield???
asked by Newton 
Physics
Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light
asked by Brian 
Chemistry
I need to figure out whether NaNO3 is saturated, unsaturated, or supersaturated in a 3 molal solution at 40 degrees Celsius. I am completely stuck right now, and am not sure where to go with this.
asked by anonymous 
Geometry
Determine the vertices of rectangle ABCD, where AB = 2BC. a) rectangle ABCD A) (0,0) B) (8,2) C (_,_) D (_,_) So far I just found the midpoint of A and B and got (4,1) but i don't know what to do after that. THe slope is 1/4, so i was thinking of finding
asked by starburst 
chemistry
Iron59 has a halflife of 45.1 days. How old is an iron nail if the Fe59 content is 25% that of a new sample of iron? Show all calculations leading to a solution. I am really confused on how to find t here? Can someone help? I can set up the rest of the
asked by Student101 
Algebraic Geometry
A 33 kilometer bicycle race course is designed in the shape of a triangle. The first leg of the race is 5 km shorter than the second, and the third leg is twice the first. Find the distance of each leg of the race.
asked by Mo mi 
Chemistry
How do I calculate the molality of a saturated solution of KCl at 70 degrees Celsius? I have gotten the moles of KCl (.66) but am not sure where to go from there.
asked by Mathieu 
Physics
Laser light of wavelength 632nm is incident on a diffraction grating having 600 lines per mm. Determine the angular separation between the first and second order maxima
asked by Felicia 
Maths
Anyone, please help: The figure below, not drawn to scale is made up of a square, a rectangle and a triangle, 1/6 of the square is shaded, 1/5 of the triangle is shaded and 1/4 of the rectangle is shaded. IF THE SHADED AREA IS 7/17 of the shaded area of
asked by JJJ.Sarah 
chemistry
estimate the boiling point of Pcl3
asked by Anonymous 
maths
what least number must be added to 630 to make the sum a perfect square? find the perfect square and its square root.
asked by shehzad 
math
a locker combination has tow nonzero digits and digits can be used twice. the first number is 8.what is the probality that the second number is 8
asked by Anonymous 
math
population increasing at rate of 5% per year current population 7,000,000 what will it be in 12years
asked by Anonymous 
mathsLiteracy,bussness and consumerstudies,economi
Which career is available for these subject
asked by tebello tumie Mokotso 
Economics
What are the costs and consequences of providing the subsidies and welfare
asked by Nokubonga 
chemistry
The charge carrier concentration of GaAs at 100oC is 1.048*1011 cm3. The charge carrier concentration at 280°C is 1.841*1017 cm3. What is the bandgap of GaAs? Give answer in eV.
asked by ocre 
Shabalala
Four factors that could threaten or limit the core functions of the media
asked by Nondumiso 
geometry
The altitude of equilateral triangle ABC is 15. What is the length of a side of triangle ABC?
asked by Tameka 
chemistry dont know how to do it
dG for the formation of Hi(g) from its gaseous elements is 20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction
asked by Anonymous 
Criminal Justice/Family Violence
Criminal prosecution of physical abuse is more common than: A. the prosecution for damaging a child’s selfesteem. B. the prosecution of emotional maltreatment. C. the prosecution of emotional humiliation. D. the prosecution of verbal abuse. I think it's
asked by Pat 
Chemistry
How much water must be added to make 500 ml of 12.0 M HCl to 1.0 M HCl (500mL• 12M) / 1.0M =6000m Is this correct?
asked by Carl 
ELA
. Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. This letter is to make you cognizant of our receipt of your order. B. Your order of February 10 arrived in our office
asked by Brooklyn 
Chemistry
A mixture of powdered carbon and an oxide of lead was heated producing lead metal and carbon dioxide.when 13.70g of the lead oxide was reduced to lead by carbon,960cm^3 of carbon dioxide measured at r.t.p was formed. Calculate the empirical formular of the
asked by Newton 
thermodynamics
find change in enthalpy and change in entropy when liquid water at 30¡ãc is converted to steam at 40 bar,375¡ãc.
asked by yajju 
physics
sixty complete waves passes a particular point in 4 seconds if the distance between 3 successive troughs of the wave is 15m calculate the speed of the wave
asked by eniola pelumi 
prob & stat
In a random sample of 63 women at a company, the mean salary is $48,902 with a standard deviation of $5270. In a random sample of 50 men at the company, the mean salary is $53,454 with a standard deviation of $4677. Construct a 95% confidence interval for
asked by sweet12 
chemistry
A current of 8.959 milliamps (103 A) is measured flowing through a tungsten wire of diameter 0.1 mm and 9 cm long when 1.7 mV is applied. What is the resistivity of tungsten? Express your answer in ohmm.
asked by ocre 
chemistry
You are operating an Xray tube with a molybdenum (Mo) target by applying an acceleration potential of 50 keV. Calculate the values of two characteristic wavelengths, λKα and λSWL. Express your answers in meters.
asked by ocre 
Criminal Justice/Domestic Violence
Children are at risk for being victimized by family violence and for perpetrating it against others. Research and theory suggest that some forms of victimization increase the risk of: A. juvenile criminal offending. B. inappropriate choices. C. smoking. D.
asked by Pat 
Stats
Employees in a large company are entitled to 15minute water breaks. A random sample of the duration of water breaks for 10 employees was taken with the times shown as: 12, 16, 14, 18, 21, 17, 19, 15, 18, and 16. Assuming that the times are normally
asked by Stat 
math
The efficiency e of a gasoline engine as a function of its compression ratio r is given by e =1− r1−γ , where γ is a constant. Find γ for e = 0.55 and r = 7.5.
asked by Mat 
math
A news papers profit is $25 per year for each of it's 5500 subscribers. Management estimates that the profit per subscriber will increase by 1 cent for each additional subscriber over the current 5500.How many will bring a total profit of $180,000
asked by antonio 
Math
If the line through (x,1) and (0,y) is coincident with the line through (1,4) and (2,3), find x and y.
asked by Allyssa 
Probability
What is the rule for the sequence 20, 17, 13, 8, 2? I've been trying to answer it by second difference method but still don't get correct formula.
asked by Kenneth 
thermodynamics
dG for the formation of Hi(g) from its gaseous elements is 20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction
asked by Anonymous 
chemistry
what is the solubility in grams of KCL3(s) per 100 ml of water?
asked by Anonymous 
Maths
A total of 80 pupils take part in a mathematics test and the average score was 69 marks. Given the average score of the boys was 75 marks and the average score for the girls was 65 marks. find the number of boys who took the test.
asked by Isarah 
physics
sixty complete waves passes a particular point in 4 seconds if the distance between 3 successive troughs of the wave is 15m.calculate the speed of the wave
asked by Anonymous 
Social sciences grade 9
What are the ideologies and history of the following: *USSR *USA *political sanction
asked by Bongiwe gamede 
English
A speech on Introducing a guest speaker
asked by Nokubonga 
chemistry
In generating the synchronous spectrum, it is not necessary to specify the wavelength range, why?
asked by Emma 
Chemistry
My teacher is an idiot and wont teach our class and im panicking so please help anyone. Given the following equations enthalpy values, determine the heat of reaction (kj) at 298k for the reaction: B2H6(g)+6Cl(g)=2BCl3(g)+6HCl(g)
asked by Kevin 
Chemistry (Acids and Bases)
What is the pH of a 0.400 molar HCl solution? I did log(.4)=.398. That seems too low. I think I need to find the molarity (M) of the solution, but I can't find it with the given information.
asked by Mark 
Algebra 1
A teacher graded the tests for each of her students. She calculated a mean grade of 80 and a standard deviation of 3. One of her students, Katrina, had a zscore of 2. What grade did Katrina get on the test?
asked by Jacob 
chemistry
calculate the solubility in grams of KCL3(s) per 100 ml of water
asked by emily 
algebra
find the amount of money in an account after 10 years if a principal of $2500 is invested at 3.5% interest compounded quarterly. show work please I got 2250 but my book shows 3542.27
asked by jaimecarlon 
chemistry
describe the detector used to acquire UVVis Spectra in the entire UVVisible spectral range at the same instant (ie. not sequential scanning of wavelengths) HELP PLEASE It is due monday :((
asked by briam 
algebra
Assume the national debt D increases at an annual rate of 5% and that the debt in 2000 was 57 billion dollars. This means that D = 57(1.05t ), where t is the number of years after 2000. In what year will the debt have doubled?
asked by Neil 
analytical chemistry
DrBob222, it is me again. Continue the question 5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL,
asked by katy 
chemistry
Higher to noise ratios can be achieved in FTIR spectra compared to spectra from dispersive IR instruments. How is such a useful feat achieved in FTIR
asked by Emily 
Math
Can you help me to understand the meaning of reduction?
asked by Olivia 
math
If 50100 dollars is deposited in an account for 14 years at 5.35 percent compounded continuously , find the average value of the account during the 14 years period.
asked by Irina 
Math
(a) Find the present value of $ 4600 per year flowing uniformly over a 10 year period if it earns 5.3 % interest compounded continuously. (b) What is its final value?
asked by Irina 
Stats (Math)
Assume that Science scores on a 25point quiz for a random sample of 5 students were drawn from a normal population. The assumed variance was 20 while the recorded variances were: 18, 16, 10, 13, and 23. You suspected that the variance is actually higher.
asked by Leeroy 
Chemistry
A 94 mL vanillin solution with a concentration of 0.017 mol L1 was made by extraction from 24.41 g of vanilla pods. Calculate the percentage of vanillin in the vanilla pods. It would be helpful if you could explain to me the process to work out this
asked by Jessica 
American Goverment
When Congress prepares a budget (Points : 1) it collects estimates from each Executive department separately. it receives a unified budget prepared by the President’s Office of Management and Budget. it figures out on its own how much each department
asked by christopher 
math
sin
asked by rahul 
wave optics
what kind of waves sensitive human ear
asked by abdulhayi musa 
science
Is glycerol a fat, carbohydrate or protein?
asked by tom 
maths
find the gretest number of seven digits which is a perfect square. also find its square root
asked by shehzad 
7th of 850.000 dollars
hi steve please help me don't now how to figure this , a 7th of 850.000 dollars what would my part be thank you michael
asked by mike 
medical billing
new patient office visit excision inflammatory cystic scalp lesion cot code
asked by debra 
Creative arts
I need a monologue for girls to present in front of the whole school tomorrow
asked by Bongiwe gamede 
Math
Tobias is helping his uncle paint the side of a barn. Each can of paint covers 80 square feet. If the side of the barn is 10 feet high and 15 feet wide, how many cans of paint will Tobias need?
asked by Laura 
Precalculus ( Absolute value)
Why does 7 + 3x = x 1 have no solution? I could plug in, for example 5, and the answer would be positive. Thank you =)
asked by Lucina 
Math
Given Perimeter of triangle is 26 inches. Side A is 3 inches longer than B. Side C is 1 inch shorter than twice side B
asked by Tom 
maths
Mr and Mrs Cheng went on an excursion with their 6 children. An average amount of $84 was spent by each adult while an average amount of $62 was spent on each child. What was the average amount of money spent on each person?
asked by classics 
English
We had a chart from AZ for Anthem by Ayn Rand. For each letter much be at least rhetorical device or a mood or tone. I need help with letters K, Q, W, V, X, Y, Z
asked by Jessica 
maths
simplify the square root of 20 minus the square root of 5 plus the square root of 45
asked by john 
S.S
The merrimack and the monitor changed naal warfare because they engaged in the first battle between A. metal covered ships B. wooden ships C. aircraft carriers D. ships carrying guns I say its B, please check.
asked by anonymous 
Math
Solve for y, state the m and b, and graph. X3y+9=0
asked by Jim 
matrices
Given B = 0 1 0 0 0 1 1 0 0 , show that B^3 = I
asked by Neil 
Organic Chemistry
any ochemists out there? Some help would be greatly appreciated. So I have this compound, it has 5 C's total, a bromine at one end and 2 methyl groups coming off the 3rd C from the bromine and an OH group at the end. like this: BrCH2CH(CH3)2CH2OH. Now
asked by paul 
English
Would knowledge be considered a theme in Anthem by Ayn Rand?
asked by Jessica