Questions Asked on
June 12, 2011

chemistry
An aqueous solution is 22.0% by mass silver nitrate, AgNO3, and has a density of 1.22 g/mL. what is the molality of silver nitrate in the solution?

College Physics
100 grams of molten lead (600oC) is used to make musket balls. If the lead shot is allowed to cool to room temperature (21oC), what is the change in entropy (in J/K) of the lead? (For the specific heat of molten and solid lead use 1.29 J/g oC; the latent

physics
a stone falls from a cliff and travels 34.3m in the last second before it reaches the ground. calculate the height of the cliff.

COLLEGE ALGEBRA
A bank loaned out $120,000, part of it at a rate of 8% per year and the rest at the rate of 12% per year. if the interested received totaled $11,000, how much was loaned at each rate?

physics
Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth : An oak barrel with a lid of area 0.25 m^2 is filled with water. Along, thin tube of crosssectional area 5.5×10−5 m^2 is inserted into a hole at the

math
FIND THE MODULO CLASS TO WHICH THE NUMBER BELONGS FOR THE GIVEN MODULO SYSTEM 53 mod 12

Algebra
In 1992, the life expectancy of males in a certain country was 63.8 years. In 1999, it was 66.0 years. Let E represent the life expectancy in year t and let t represent the number of years since 1992. The lineahntthe nearest ter function E(t) that fits the

Physics
When driving west toward the Rocky Mountains, you see a peak 3.0 above the horizon. Your GPS gives your current elevation as 1630 , and according to the map, you're 28.5 (horizontally) from the peak. Find the peak's elevation

Chem
how do you find the boiling temp of 2m of c6h12o6

pre calculous
use the properties of logarithms to write the expression as a sum or difference of logarithms or multiples of logarithms. show your work ln x^2/y^3 Assuming x,y AND z are positive use properties of logariths to write the expression as a single logarithm

chemistry
How many mL of a 4.7 M HNO3(aq) solution are required to make 500 mL of a solution with pH=2.10

maths
lisa won the lottery she used 1/2 of her lottery win to buy a house she gave 1/6 of her lottery win to charity lisa then shared the remainder of her lottery win equally amongst her 4 children what is the fraction of lisa's lottery win that each of her 4

chemistry
How could you separate lauric acid from anaphthol?

Algebra
Write the number in the form a+bi sqrt(4) + 10 ????? Please help!

computer
construct function prototypes for descriptions given below: 1) Rarb() takes no arguments and has no return value. 2) Mains() takes a float argument and returns an int. 3) San() takes two double arguments and returns a double. 4) Sum() takes an int array

math
Divide a clock face with 1 straight line so that the sum of the numbers in each part are equal.

PreCal
The population of Las Vegas, Nevada in 2000 was 478,000 and is increasing at the rate of 6.28% per year. At this rate, when will the population reach 1 million people? a)1.51 years b)2.32 years c)12.12 years d)10.84 years

physics
aball is thrown vertically upward with a speed v from a height h above the ground. find the time taken for the ball to strike the ground.(consider acceleration due to gravity =g)

trig
how high is a tree that casts a 30 ft shadow at the same time a 10 ft pole casts a shadow which is 10 ft long?

Algebra
A chess board has 64 squares. If pieces occupy 19 squares, how many squares are unoccupied?

Math
How do you put 33/10 & 29/6 into mixed numbers????!:)????!(:????!(:????!(:

Algebra
How do I solve this? 125x^3 + 343 = 0 Please help me!

Cultural Diversity
The instructional strategy that works best to give a child from a culturally different background a sense of security and mastery is: recounts. repetition. using an intermediary. eventcasts. i say repetiton.

health
how to set up a proposal for do preemployment physicals for 60 bus drivers

social studies
explain the different aspects of life in which women are discriminated in India??

physics
Factory Worker A is exposed to a sound of a constant intensity of 6.30 × 10–4 W m–2 at a distance of 1.00 m from a noisy machine. The frequency of the sound is 4.00 kHz. (a) What is the sound level in decibels (dB) of this sound? (b) By what factor

pre calculous
solve each equation algebraically and check it by substituing into the orignall equation. 50e^0.035x=200 3LN(x3)+4=5 Method of your choice by solving. logx^2=6 Logx^4=2 2x2^x/2=4 e^x+e^x/2=4 500/1+25e^.3x=200

chemistry
calculate the molar mass of glucose and the no. of atoms of each kind in it.

Physics
Vector A points in the negative direction. Vector B points at an angle of 35.0 above the positive x axis. Vector has a magnitude of 10 and points in a direction 46.0 below the positive x axis.

College
Shantisha Brown SC54301 Article Critique 1 Mindes, !@#$%^≤ Murphy, Kathleen Torina (1982). The Importance of Play and Games in the Middle School Program for Emotionally Disturbed Young Adolescents. Journal of Mental Health Counseling, 31, 131140. In

maths
Write these numerals in expanded form using power of 10. a 39 b 104 c 516 d 7056 e 61238

Physics
A concave mirror is constructed so that a man at a distance of 26 from the mirror sees his image magnified 1.5 times. What is the radius of curvature of the mirror?

5th grade math
If you roll two number cubes numbered 16, what is the probability of rolling the same number on each cube?

Cultural Diversity
Which one of the following choices best completes the following scenario? A fiveyearold __________American child used to enjoy choosing her playmates and activity centers on the playground, but after her mother visited and observed the free play time,

algebra
The area of a rectangular athletic field is represented by the expression 16y²49z² square meters. Write an algebraic expression to represent one possible set of dimensions (in the sense “length times width”) of the athletic field. Include correct

algebra
Andrew factored the expression 28x©ø6x©÷10x as 2x(14x©ø3x©÷5x) . But when Melissa applied the distributive law and multiplied out 2x(14x©ø3x©÷5x), she got 28x©ù6x©ø10x©÷; thus, Andrew¡¯s solution does not appear to check. Why is

College PreAlgegra
1. Find the exact value of tan660 using the functions of 330deg. 2. Solve the equation 2sin^20+5sin0+3=0 on the interval 0

maths
sarah brought a computer for £330000 each year the computer depreciated by 20% what is the value 2 years after he bought it ?

Algebra
Suppose that y varies directly with x and inversely with zy=25 when x=35, and z=7. Write the equation that models the relationship. Then find y when x=12 and z=4 Help me!?

maths
factorise; r squared take away 5t

CHEM 111
Calculate the pH of the solution that results from the addition of 12.00mL of 0.225M HNO3 to 20.00mL of 0.210M NH3. Buffer titration problem. Do I find moles and then???

physics
Marks: 4 A circular plate of radius 0.5 m is placed perpendicular to the direction of the magnetic field of 0.5 Tesla. What is the change of flux in the plate if it rotates and its plane becomes parallel to the direction of the magnetic field?

physics
A 0.2 kg conductor of length 0.8 m carries 2 ampere current to the right in a magnetic field. What is the magnitude and the direction of the magnetic field acting on the conductor if the net force on the rod is zero? (Assume that the rod is hung by two

microeconomics
If a monopolist is producing a quqnity that generates MC=Mr,then profit: a) is maximized b) is maximized only if MC=p c) can be increased by increasing production d) can be increased by decreasing production

geometry
ZY=7XY then ZX=8XY

Algebra
Train a is traveling @ 60 miles per hour. Train b is traveling @ 80 miles per hour. A arrives @ 9:25 am and b arrives @ 9:40 am what ime will train b catch up to train a?

science
what is the morality of a solution made by dissolving 1.00g of sodium hydroxide, NaOH in 100 mL of water

science
what is the morality of a solution made by dissolving 1.00g of sodium hydroxide, NaOH in 100 mL of water

science
what is the morality of a solution made by dissolving 1.00g of sodium hydroxide, NaOH in 100 mL of water

English
Explain the problems with this statement. Antigone said: "But I will bury him: and if I must die, I say that his crime is holy: I shall lie down with him in death, and I shall be as dear to him as he to me" (Sophocles 5760)

physical science
A car weighing 15,000 N is speeding down the highway at 90 km/h. What is its momentum?

algebra
find the equation of the perpendicular line to y=1/2x+4 and passing through the point (1,2) PLEASE HELP :)

Pre Calc
the graph f(x)=cos x Which gives the graph of g(x)=2cos[3(x+(pi/3))]5 write the equation of g(x) in terms of f(x). Is the question basicly asking for me to do g(f(x))?

chemistry
which has a greater entropy: 300mL of hydrogen gas or 300mL of liquid hydrogen ?

Business
Is it good or bad for corporations to rely on vendors for computing support? List arguments both for and against reliance on vendors as part of your answer.

Physics
A single photon in empty space is converted into an positron and an electron, each with rest mass 511Mev. (a) show this transformation is not possible (dynamaically). (b)How could this transformation be made posible. (c)what is the minimum photon energy

Chemistry
the pH of 10.00 mL of 0.100 M HCl after adding 10.00 mL of indicator solution

physics
This refers to the shuttle orbir question: my response to answers posted: So would I take the answer from the formula for a circumference of a circle(24900.26337) and divide it by 17,265 to get 1.442239408(~1.44h)? How I got the circumference: 2 x pi x

Stats Twotailed test
A researcher is conducting a matchedpairs study. She gathers data on each pair in the study resulting in the table below. Assume that the data are normally distributed in the population. Pair Group1 Group2 1 10 12 2 8 9 3 11 11 4 8 10 5 9 12 a) At 10%

albebra
What is the slope 0f x=2

Algebra
how do you graph y=6

social studies
Describe how influential you would say the cold war has been on the world of today ?

Algebra
y+x=2 What is the y intercept? What is the ordered pairs?

Physics
You drive due east at 86km/h for 55min . Then you follow a road going 60 degrees south of east, going 99km/h for another 40min . Find your total displacement

matt/116
b. For the first phase of the project, imagine you want to cover the backyard with decorative rock and plant some trees. You need 30 tons of rock to cover the area. If each ton costs $60 and each tree is $84, what is the maximum number of trees you can buy

Physics
You walk 1130m east and then 950m south in a total time of 22min . Compute your displacement. Enter the east and south components of the displacement separated by a comma. Compute your average velocity in m/s . Enter the east and south components of the

Physics
You walk 1130m east and then 950m south in a total time of 22min . Compute your displacement. Enter the east and south components of the displacement separated by a comma. Compute your average velocity in m/s . Enter the east and south components of the

MathAlgebra 1
I need help with a pizzaz work sheet ASAP if i don't get this done i am on the verge of failing math and repeating 9th grade. its Pizzaz 11.10 thanks

social studies
the most significant thing to learn about the differences between social, political and economics systems in the world ???????

Computers
Assume that an average SNMP message is 100 bytes long. Assume that a manager sends 40 SNMP Get commands each second. a) What percentage of a 100 Mbps LAN link’s capacity would the resulting response traffic represent? b) What percentage of a 128 kbps WAN

physics
A 2.9m nylon fishing line used to hold up a 5.2 kg fish has a diameter of 1.4 mm How much is the line elongated?

Math
Ben takes 6hrs to get a job done & Ted takes 11hrs to get the same job done. If they work together how long will it take them?

math
Mr. puts $10,000 into a CD that pays 8.5% interest compounded monthly. If he keeps the money invested for 10 years, what will be the value at the end of 10 years?

physics
The problem concern the position vectors r1=2.43mi4.74mj and r2=3.02mi+0.85mj. Find the angle between the two vectors. Hint: Find the angle each makes with the +xaxis.

physics
The problem concern the position vectors r1=2.43mi4.74mj and r2=3.02mi+0.85mj. Find the angle between the two vectors. Hint: Find the angle each makes with the +xaxis.

chemistry
which of the following are isoelectronic species: Na+,K+,Mg+2,Ca+2,S2,Ar

physics
The problem concern the position vectors r1=2.43mi4.74mj and r2=3.02mi+0.85mj. Find the angle between the two vectors. Hint: Find the angle each makes with the +xaxis.

computer
write the following exponent.form.into fractional form: 1) 55.67878E05 2) 67.34567E04 3) 34.5678E05

biology
flow chart for respiration and digestion

stats math
Popular wisdom is that eating presweetened cereal tends to increase the number of dental caries (cavities) in children. A sample of children was (with parental consent) entered into a study and followed for several years. Each child was classified as a

Geography
how does geography affect cultural exchange? (cant figure it out)

statistics
2. A researcher hypothesized that the pulse rates of longdistance athletes differ from those of other athletes. He believed that the runners’ pulses would be slower. He obtained a random sample of 10 longdistance runners. He measured their resting

physics
a point charge 50*10 raise to the power 6 C is located in the XY plane at the position vector r0= 2i^+3j^. what is the electric field at the point of position vector r=8i^+5j^?

precal
Given an initial value of 17 g, which is halving once each 32 hours, an exponential function in term of hour t which models this situation is ...?

Math
The population of Las Vegas, Nevada in 2000 was 478,000 and is increasing at the rate of 6.28% per year. At this rate, when will the population reach 1 million people?

chemistry
15 GREM OF C6H12O6 WILL PRODUCE HOW MUCH CO2?

Chemistry
how would I make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution?

maths
A cubiod is cut into two triangular prisms by a single cut. Each of the resulting solids has How many faces? How many edges? How many vertices?

Chemistry
At what speed must an electron travel to have a wavelength of 13.6 pm? I got 9.89x10^15 as the answer and its wrong where did I mess up in my calculations?

chemistry
calculate the molar concentration of substance in a solution containing 5,85g of Nacl2 in 200cm cube solution

Chemistry
What is the energy of a photon corresponding to radio waves of frequency 1.475 106 /s? I got 9.77e28 as an answer and its wrong so what is wrong with my calculations.

chemistry
calculate for strong electrolyte the ph of 0,1M pf HNO3

algebra
5/(n^3=5n^2)=4/(n+5)+1/n^2

Algebra
(n+5)/(n+8)=1=6/(n+1)

physics
A 735 N person walks up three flights of stairs, covering a total vertical distance of 10.0 m. If, as is typical, only 20.0% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use?

chemistry
calculate for weak acid with ph 0,1M of CH3COOH (K=1,8*105)

math
4 – ( 6)

physics
A large stone is dragged 15m over a frozen lake. If the coefficient of friction between the stone and the ice is 0.1 and the whole process takes 8 seconds, how much work is done and how much power is required?

English  To Kill A Mockingbird
Hi My earlier question needed some clarification. I'm writing a monologue on a marginilised To Kill A Mockingbird character, I am doing Aunt Alexandra. During my monolouge I made two statements from Aunt Alexandra's pov. The first is that Aunt Alexandra

Medical Coding and Billing
I need help I have to write a research paper on compare and contrast Mac vs PC. Which one is better for the medical field and Why? I don't know where to start looking can you please help me

Chemistry
A gas has a volume of 50.0 cm3 at a temperature of 73°C. What volume would the gas occupy at a temperature of 123°C if the pressure stays constant

Math
A space shuttle is spotted flying at an angle of elevation of 17° when sighted from Cape Canaveral. At the moment it is sighted, it is directly overhead a ship located 12 mi from the Cape. The height of the shuttle at this moment is approximately a)3.5

Chemistry
At what speed must a neutron travel to have a wavelength of 9.2 pm?

kahyla
use the properties of logarithms to write the expression as a sum or difference of logarithms or multiples of logarithms. show your work Ln 8x 2. log2y^5

life orientation
critically discuss 5 ways in which the human or enrimental problem impacts on the community within south africa

pre calc
find the exact solution algebraically and check it by substituting into the orginal equation. 1. 36(1/3)^x/5=4 2. 32(1/4)^x/3=2

Accounting
What is the maturity value of a 120day, 4 % note for $ 18,000

Math
Assume that the allowance account has a debit balance of $7,000 at the end of the year, before adjustments. If the estimate of uncollectible accounts based on aging the receivables is $10,000, the amount of the adjusting entry for uncollectible accounts

physics
A 100Kg stone is dragged 15m over a frozen lake. If the coefficient of friction between the stone and the ice is 0.1 and the whole process takes 8 seconds, how much work is done and how much power is required?

Accounting 2
At the beginning of the year, we purchased a generator for $ 56,000. We expect then generator to have a useful life of 12 years, or 60,000 hours. The residual value of the generator at the end of its life is expected to be $ 5,600. We actually used the

pre calc
find exact solution algebraically and check it by substituting into the original equation. 2(10^x/3)=20 logtiny4(x5)=1

arithmetic
The 9th term of an A.p is 32 while the12th termis70.find the sum of it 20th term

precalc
A is accumulated amount investing after p principal for t years at and interest rate of r compounded anually k is times per year. P=$1500, r= 7%, t=6 P=1500, r=7%,t=5,k=4 P=$1250, r=5.4%,t=6

English
Can you please suggest a site where I can find information on Roosevelt and the New Deal to be used in a class of EFL speakers? Thank you very much!

WRITING
Dear Sharon, I remember when you walked in and you spotted me sitting on the lefthand side of the store. You walked slowly around me and then you squeezed and gently stroked me with your hands. Each stroke felt so nice and I enjoyed every moment. You sat

English
What does this quote means? Please interpret. "A sure way for one to lift oneself is by helping to lift someone else,"  Booker T. Washington

math
solve for x 2ax+b=c

chemistry
if you have 24.00grams of O2 at 30 degrees Celsius, 204 KPa. how many liters of O2 do you have?

life science
explain two ways in which the auditory canal is adapted for its function.

trigonometry
if sin where defined=1/5 and where defined is in quadrant I find the exact value of sin2 where defined

sci
Is global warming skepticism just smoke and mirrors?

Criminal Justice
What safeguards might be employed to reduce or eliminatee unethical activity within the walls of a correctional facility?

persuasive essay
Why Americans should not count on Social Security for retirement. Even though Social Security may always have enough funds to support itself, Americans need another form of retirement funding in addition to Social Security. Americans cannot live on Social

algebra
a two digit number is four times the sum of its digits and twice the product of the digit. find the number using elimination method

chemistry
pure hydrogen gas is burns gently, combining with the oxygen gas of the air to form water vapor

physics
a stone is thrown vertically upward with an initial velocity v0. the distance travelled by it in time 1.5v0/g

math
a train 280m long .its speed is 60 km per hour. then ,how much time it will take to cover220m long platform?

Biology
You are a botanist hired in the future to make a distant planet, Xyloph, habitable for human life. Your job is to help seed the planet with plant life by working with the Terraforming Team. All four major kinds of plants will be introduced into this new

math
a liscence plate for a car must consist of a letter followed by two numbers. Each letter mus be an R, U or N. Each number must be a 2 or 6. Repetition of digits is permitted. Use the counting principle to determine the number of points in the sample.

chemistry
in naming hydrocarbons .. if the hydocarbon has a double bond .. do i automatically consider it from the parent chain.. or it could be in a branched part

Chemistry
determine the pH of a solution made by mixing 8 ml of 1.10M acetic acid and 2ml 0.9 M sodium acetate solution. pKa for acetic acid CH3COOH is 4.745. Can someone please explain

physics
The plane is flying horizonally at 40m/s at an altitude of 125 m when it drops a bomb. determine how far horizonally from the target you should release the bomb

English
Could you please check this paragraph? It is really urgent. Thank you!! 1)My name is Michele and I was born in Torino on 23 march 1997. When I was three years I went to Rome with my family. 2) Now I have got 14 years old and I go to secondary school . 3)I

health
where do you seek help when a person is in danger of suicide?

cultural diversity
I actually am just looking for any ideas on multicultural issues in education, i have some ideas but have to make a list now and im assuming later on maybe pick one for a final project or something. any help would be greatly appriciated

statistics
In the past a certain college has found that 35% of the students will grad within 4 years. A random sample of 450 students at this college is taken and going to be followed until graduation. A. What is the sampling distribution of the statistic of

Math
is coefficient of correlation and coefficient of determination the same thing? or different?

Math
is coefficient of correlation and coefficient of determination the same thing? or different?

managerial finance
The annual bonus for senior managers at Wanstead Engineering was first agreed in 1998. Since then the company has seen no need to make any changes to the way in which the bonus is calculated. Both shareholders and managers agree the bonus is important, as

Chemistry
At what speed must an electron travel to have a wavelength of 13.6 pm? I got 9.89x10^15 m/s as the answer and its wrong where did I mess up in my calculations? I keep coming up with 9.89x10^15 m/s and its wrong.

Into to busineess
How can lean manufacturing and nearsourcing help a company gain a competitive edge and prepare for the future

maths
The mean weight (1.0042kg) of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

persuasive essay
Why Americans should not count on Social Security for retirement. Even though Social Security may always have enough funds to support itself, Americans need another form of retirement funding in addition to Social Security. Americans cannot live on Social

history
How does the Euthyphro Problem attack modern cognitive religion? Is there a response that would satisfy the problem? I need help with the 2nd question.. this Is my answer however: Euthyphro Problem appears in the dialogue of Plato who ponders on the

history
The following links provided weren't helpful.. I used them to discover parts of my answer though. Can someone check my answer and help me with questions 2? How does the Euthyphro Problem attack modern cognitive religion? Is there a response that would

math
Perform the modular arithmetic operation 6.9 ( mod 5)

math
factor (25x^2)

algebra
Work out the value of 4(x+1) 4(x+1) when x=3

Maths
Sarah said when x=3 then the value of 4x squared is 144 holly said when x=3 then the value of 4x squared is 36 who is right and why?