Questions Asked on
March 17, 2013

Chemsitry
The Ksp of PbBr2 is 6.60× 10^–6. What is the molar solubility of PbBr2 in pure water? What is the molar solubility of PbBr2 in 0.500 M KBr solution? What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?
asked by Anon 
Statistics
Suppose a basketball player is an excellent free throw shooter and makes 90% of his free throws (i.e., he has a 90% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player gets to shoot three
asked by Grace 
statistics
a pizza shop owner wishes to find the 95% confidence interval of the true mean cost of a large plain pizza. how large should the sample be if she wishes to be accurate to within $0.15? a previous study showed that the standard deviation of the price was
asked by paula 
Chemistry
(Ksp= 5.0*10^13) 1) Calculate the molar solubility of AgBr in 3.0×10^−2 M AgNO3 solution. 2) calculate the molar solubility of AgBr in 0.10 M NaBr solution. I tried solving using this the quadratic formula, but it didn't work. I started with these
asked by Jonah 
calculus
a right triangle is formed in the first quadrant by the x and y axes and a line through the point (1,2). write the length of the hypotenuse as a function of x. find the vertices of the triangle such that its area is a minimum.
asked by ej 
Chemistry
What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 4.40 L of an NaOH solution with a pH of 10.5?
asked by Emma 
trig
How do I find the exact value of sin (pi/24)?
asked by Luis 
Chemistry
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca^2+ (aq) and 0.0390 M Ag^+ (aq). What will be the concentration of Ca^2+ (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca^2+ (aq) can be separated from the Ag^+ (aq) by
asked by Anon 
Chemistry
What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.20 × 103 M Ag ? The Ksp of Ag2SO3=1.50×10^–14 Is the concentration of SO32 = 4.69*10^12?
asked by Anon 
stats
The mean of nonresidential buildings is 30 years and the standard deviation of the ages of the buildings is 5 years. Determine the probability that a random sample of a group of 50 nonresidential buildings will have a mean age of less than 27.5 years.
asked by renea 
Statistics
32% of adult internet users have purchased products or services online. For a random sampling of 200 adult users, find the mean, variance and standard deviation for the number who have purchased goods or services online?
asked by Kay 
English
The students felt fairly prepared for whatever tests their instructors might give them, after years of studying , however difficult the test might be which group of words is misplaced in the sentence above? a. however difficult they might be b. the
asked by mary 
math
an adult whale weighs 120 tons. a baby blue whale weighs 1/40 of the weight of the adult blue whale. how many pounds does the baby blue whle weigh?
asked by VANESSA 
geomerty
The hexagon GIKMPR and FJN are regular. The dashed line segments form 30° angles. Find the image of after a rotation of 300° about point O.
asked by TThias 
Aqueous Solution
Write the positive and negative ions that result when the following compounds are dissolved in aqueous solution: Na2S (aq): (NH4)2CO3 (aq): K2SO4 (aq):
asked by Annette W 
Physics
Two wires run from the top of a pole 2.6m tall that supports a volleyball net. The two wires are anchored to the ground 2.0m apart, and each is 2.0m from the pole. The tension in each wire is 100N. here are the dimensions. I do not understand how to setup
asked by rob 
math
An artifact was found and tested for its carbon14 content. If 76% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a halflife of 5,730 years.)
asked by buffy 
Chem
What is the specific heat in J/g Celsius for a metal sample with a mass 95.6 g which absorbs 841 J of energy when it's temperature increases from 30.0 degrees Celsius to 98.0 degrees Celsius?
asked by Mike 
chemistry
If 24.0 L of O2 burns completely a sample of carbon disulfide, how many moles of sulfur dioxide (SO2) will be produced at 15 degrees Celsius at a pressure of 1.3 atm? CS2 + 3O2 > CO2 + 2SO2
asked by M 
physics (Newton's Laws)
Please help, A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on
asked by Kathy 
Chemistry...
Wha is PAV glue.? Full explanation please!
asked by Anonymous 
Physics
A roller coaster cart travelling due north at 20m/s that turns left during an interval of 4.0s without changing speed. Find the average acceleration. I understand the mathematics behind it (using pythagoras's theorem to find velocity and the formula
asked by Annie 
stats
A large shipment of Granny Smith apples arrives at a grocery store. Weights of the apples are known to follow a normal distribution with mean 139 grams and standard deviation 9 grams. 1)If you select a random sample of 50 apples, what is the probability
asked by Anonymous 
physics
Two wires run from the top of a pole 2.6 tall that supports a volleyball net. The two wires are anchored to the ground 2.0 apart, and each is 2.0 from the pole. The tension in each wire is 100. I do not understand how to setup work. if could show I would
asked by rob 
Chemistry
if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? CS2 + 3O2 > CO2 + 2 SO2
asked by M 
Pre cal
ix^22x+i=0
asked by Anonymous 
statistics
The mean of nonresidential buildings is 30 years and the standard deviation of the ages of the buildings is 5 years. Determine the probability that a random sample of a group of 50 nonresidential buildings will have a mean age of less than 27.5 years.
asked by jon 
Chemistry
How do you solve this: if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? (the answer is 45.7 g). CS2 + 3O2 > CO2 + 2SO2
asked by M 
mathssurface area
A solid is in the form of cone mounted on a hemisphere in such a way that the centre of the base of the cone just coincide with the centre of the base of the hemisphere. Slant height of the cone is L and radius of the base of the cone is 1/2r where through
asked by anoynomous 
geometry
the perimeter of parallelogram QRST is 26cm. If ST=e 6cm what is the length of RS
asked by danielle 
chemistry
If 24.0 L of O2 burns completely a sample of carbon disulfide, how many moles of sulfur dioxide (SO2) will be produced at 15 degrees Celsius at a pressure of 1.3 atm? CS2 + 3O2 > CO2 + 2SO2
asked by M 
chemistry
If 24.0 L of O2 burns completely a sample of carbon disulfide, how many moles of sulfur dioxide (SO2) will be produced at 15 degrees Celsius at a pressure of 1.3 atm? CS2 + 3O2 > CO2 + 2SO2
asked by M 
stats.
Based on data from the National Center for Health Statistics, N. Wetzel used the normal distribution to model the length of gestation for pregnant US woman ( Chance, Spring 2001). Gestation length has mean of 280 days with a standard deviation of 20 days.
asked by Lindsey please help 
math
A quantity of oxygen gas had 16.32 g of the radioactive isotope oxygen19 in it. When measured exactly 10 minutes later, the amount of oxygen19 was 0.964 g. What is the halflife, in seconds, of oxygen19?
asked by Matthew 
Physics
The primary of a stepdown transformer connected to a 240 V source has 1000 turns. The secondary has 100 turns. What is the output voltage of this transformer?
asked by Natalie 
Math
5/4 + 7/4 x cos(2x)+ 3/4 x cos(4x) 1/8 x cos(2x) x cos(4x)
asked by Sarah 
physics
exercise 4.1 suppose the pilot start agin from rest
asked by jk 
Math
Make a tree diagram of all the possible arrangements of the word veer
asked by Carl 
Physics
A transformer has 25 turns in the primary coil and 200 turns in the secondary coil. If 12 V is connected to the primary coil and a 20Ω device is connected to the secondary coil, calculate the current in Amperes passing through the device.
asked by Natalie 
Physics
Monochromatic xrays (λ = 0.166 nm) from a nickel target are incident on a potassium chloride (KCl) crystal surface. The spacing between planes of atoms in KCl is 0.314 nm. At what angle (relative to the surface) should the beam be directed for a
asked by Ken 
Math
A spherical container 15cm in diameter is half full of acid.the acid is poured into a tall cylindrical beaker of diameter 6cm how deep is the acid in the beaker
asked by gillan 
Physics
A 8.78 m ladder with a mass of 23.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 236 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular
asked by <3 
stat.
The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between
asked by chris 
Chemistry
A .1M solution of chloroacetic acid is 11% ionized. Using this information, calculate [ClH2COO], {H+], [ClCH2COOH] and Ka for cloroacetic acid.
asked by Kaylin 
Science ASAP
2. Ferns have roots, stems, and leaves just like seed plants. Why are they classified separately? (1 point) Their leaves are compound and feathery. They produce cones to reproduce. Their roots are only shallow rhizomes. They produce spores instead of
asked by Delilah 
Chemistry
if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? CS2 + 3O2 > CO2 + 2 SO2
asked by M 
Chemisrty
How do you solve this: if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? (the answer is 45.7 g). CS2 + 3CO2 > CO2 + 2SO2
asked by M 
math
Find the monthly payment for the loan. (Round your answer to the nearest cent.) $800 loan for 12 months at 10%
asked by buffy 
chemistry
how many grams of KClO3 will dissolve in 1 liter of water at 50 degree celisus ?
asked by Stephanie Diaz 
Math..
4(x+1/2)2(x+3/2) less than. Or equal to 5 ( i. Solved it im just checking my answers to be sure )
asked by Jim 
science help plzzzzzzzzzzzzzzz?
all but one of the following statement about the melting and crystallization of magmas is correct.identify the one statement that is incorrect. 1)the presence of water decreases the melting temperature of magma. 2)the upper part of magma in a magma chamber
asked by centya 
SOC 313
1. Motor and perceptual consequences of brain damage affect: (Points : 1) visualspatial relations; vision and hearing; and bowel and bladder function memory; attention and concentration; and judgment speech and language personality change and affective
asked by Ms P 
SOC 313
10. An important consideration of neurological conditions is that: (Points : 1) for many neurological conditions, available treatment is plentiful and directed mainly toward curing the disease. the rate of progression and degree of loss of functional
asked by Ms P 
math
From a survey of 100 college students, a marketing research company found that 85 students owned iPods, 45 owned cars, and 35 owned both cars and iPods. (a) How many students owned either a car or an iPod (but not both)? 1 students (b) How many students do
asked by buffy 
math
a bag contains lettered tiles, two for each letter of the alphabet. What is the probability of drawing a tile with the letter A? express the probability ratio as a fraction and as a decimal rounded to the nearest hundredth
asked by jill 
math
Assume the car can be purchased for 0% down for 60 months (in lieu of rebate). A car with a sticker price of $42,100 with factory and dealer rebates of $5,100 (a) Find the monthly payment if financed for 60 months at 0% APR. (Round your answer to the
asked by buffy 
math
Assume the car can be purchased for 0% down for 60 months (in lieu of rebate). A car with a sticker price of $42,100 with factory and dealer rebates of $5,100 (a) Find the monthly payment if financed for 60 months at 0% APR. (Round your answer to the
asked by buffy 
Soc. Studies
President Nixon’s Vietnamization policy emphasized that the United States must A.use any means necessary to end the war. B.open trade relations with a unified Vietnam. C.defeat communism in Vietnam to preserve other countries. D.empower South Vietnamese
asked by Cassie 
statistics
The amount that airlines speed on food per passenger is normally distributed with means $8.00 and standard deviation $2.00. What is the probability that a randomly selected airline spends more than $12.50?
asked by tony 
chemistry
how do you use aldehydes to prepare acyl chlorides?
asked by sharmin 
statistics
The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between
asked by tony 
statistics
Based on data from the National Center for Health Statistics, N. Wetzel used the normal distribution to model the length of gestation for pregnant US woman ( Chance, Spring 2001). Gestation length has mean of 280 days with a standard deviation of 20 days.
asked by lindsey 
Math
7.24 multiplied by 3.4. Find the solution and round to the tenths. I'm confused I have two answers
asked by Jess 
Chemistry
At 25 °C only 0.0610 mol of the generic salt AB2 is soluble in 1.00 L of water. What is the Ksp of the salt at 25 °C? AB2(s) A^2+(aq)+2B^(aq) Is the answer ksp=9.08*10^4?
asked by Anon 
physics
i know this is stupid most likely but i missed a few weeks of lecture bc i was in hospital and i caught up on most of the notes but certain parts have me confuse, does anyone know how to tell if an electric force is negative or positive?
asked by vii 
chemistry
2) Suppose you have 5.00g of powdered magnesium metal, 1.00L of 2.00M potassium nitrate solution, and 1.00L of a 2.00M silver nitrate solution. a. Which one of the solutions will react with the magnesium powder?
asked by Anonymous 
Chemistry
How many drops (1 drop=0.05mL) of 0.20M KI must we add to 100.0 mL of 0.010M Pb(NO3)2 to get a precipitate of lead iodide to start. Ksp of PbI2=7.1e9. Answer=9 drops. Please show steps.
asked by Cody 
Physics
A 0.026 kg golf ball moving at 19.6 m/s crashes through the window of a house in 5.6 104 s. After the crash, the ball continues in the same direction with a speed of 8.2 m/s. Assuming the force exerted on the ball by the window was constant, what was the
asked by Anonymous 
math
Hi im trying to help my daughter figure out the area and perimeter of her bdrm which is 11'3 * 17'
asked by Anonymous 
maths
choco borrowed $10 000.00 from a bank for 4 years at 8 per cent per annum. calculate simple interest that choco should pay and find how much she had to repay for the four years altogether
asked by Anonymous 
math
Karen and Wayne need to buy a refrigerator because theirs just broke. Unfortunately, their savings account is depleted, and they will need to borrow money in order to buy a new one. Sears offers them an installment loan at 15% (addon rate). If the
asked by Andrew 
math
There is a picture with stacked cubes that are each 2inches. + ++ +++ ++++ +=the pic i have of cubes=(+=2in cube) Each side of a cube in the diagram measures 2 inches. What is the total surface area and volume of the solid? I did A=s squared A=2 squared A=
asked by ES 
paper
Prepare a 1,050 to 1,750word paper in which you describe the research process. Include the following: · Include new terminology learned from the reading. · How will this new terminology and knowledge apply to a career in criminal justice? · How can
asked by stan isaq 
Chemistry
At 22 °C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.49. What is the Ksp of the salt at 22 °C? Is the ksp=1.38*10^11?
asked by Anon 
Lang. Arts
2. Read the following passage from “The Medicine Bag.” But after they left, Mom said, “No more visitors for a while, Martin. Grandpa won’t admit it, but his strength hasn’t returned. He likes having company, but it tires him” That evening,
asked by Cassie 
MATHS
ms.sue can you practice me in maths for s.e.a like give me sites to do test then you will correct when i post the answers
asked by fred 
Math checking
(2x+1)/5  (x+3)/2. < 4x+10
asked by Jim 
Lang. Arts
Of the following things that Martin says or does, which best illustrates the theme of the story? A.Martin brings his friends home to meet his grandfather. B.Martin goes to the reservation to replace the sacred sage. C.Martin is nervous about receiving the
asked by Cassie 
College Chemistry/Lab Math
I think I have this problem figured out correctly, but is there anyone who can tell me if I'm doing something wrong. The question is... "One troy ounce of gold is worth $380. There are 33.8 grams per troy ounce. You have a stock colloidal solution of a
asked by James 
math  calculus BC
find a power series representation of: f(x)=((x^2)1)*sin(x)
asked by Anonymous 
chemistry
what is chromatography? Its history,purpose in chemistry.
asked by Anonymous 
am literature
what does ethos pathos and logos mean
asked by tom 
Trigonometry
Hi, I really need help in understanding how to solve trig equations. How do you solve this equation? Solve the equation on the interval 0 < or equal to x < or equal to 2pi. sinx = (square root of 3)/2 I appreciate your help. Thank you!
asked by Leah 
Lang. Arts
Which elements of a story can help you predict early on what a story will be about? (Choose all that apply.) A.the author’s name B.the title C.the tone of the first paragraph D.illustrations and captions I definitely think it is B and D...A is
asked by Cassie 
math
Annual demand for the notebook binders that Ted's Stationery Shop sells is 10,000 units. Ted operates his business on a 200workday year. The unit cost of a binder is $2, and the cost of placing an order with his supplier is $0.40. The cost of carrying
asked by park 
Solubility Rules
Using the solubility rules, predict the solubility of each of the following compounds in water: (S= Soluble, I= Insoluble) a)CaCO©ý _______ b) Al(OH)©ý ______ c) Hg©üCl©ü _______ d) Pb(NO©ý)©ü _______
asked by Annette W 
Physics
I am having a problem answering a physics question: A plane is heading due south and climbing at the rate of 60 km/hr. If its airspeed is 540 km/hr and there is a wind blowing 110 km/hr to the northwest, what is the ground speed of the plane?
asked by Patrick 
Math
Belmont Records produces DVD records. The fixed costs for producing a record are $160,000, and unit cost amount to 85 cents per record. The revenue is $5 per DVD. (a) How many DVDs must be sold in order to break even? (b) Find the profit or loss if 20,000
asked by Matt 
Life orientation
Work ethics,4 actions to deal with unethical behavior at work
asked by Anonymous 
Chemistry
Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 1013) in the developing process for blackandwhite film. What mass of AgBr can dissolve in 1.40 L of 0.425 M Na2S2O3? Ag+ reacts with S2O32 to form a complex ion. Ag+(aq) + 2
asked by Howard 
Chemistry
Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 1013) in the developing process for blackandwhite film. What mass of AgBr can dissolve in 1.40 L of 0.425 M Na2S2O3? Ag+ reacts with S2O32 to form a complex ion. Ag+(aq) + 2
asked by Howard 
Algebra
The letters in the word Paris are written on slips of paper and placed in a bag. Each letter will be put back after it is drawn. What is P(r, then vowel)? A.1/5 B.2/5 C.3/5 D.2/25 I think it is D...?
asked by Cassie 
Chemistry
Write equations for the stepwise formation of each of the following complex ions. (Type your answer using the format CO2 for CO2, [NH4]+ for NH4+, and [Ni(CN)4]2 for Ni(CN)42. Use the lowest possible coefficients.) (a) Ni(CN)42 (b) Mn(C2O4)22
asked by Howard 
Algebra
A basket contains 5 green lollipops, 12 red lollipops, and 7 orange lollipops. When a lollipop is taken from the basket, it is not replaced. What is P(orange, then orange)? A.42/576 B.42/552 C.7/24 D.14/48 Ithink it is C...?
asked by Cassie 
Gas Law problems ( Chemistry)
the initial temperature of a 1l sample of gas is 20c. The pressure is decreased from 720mmhg to 36mmhg and the volume increases to 2.14l. What was the final temperature of the gas?
asked by Allyson 
math
find the monthly payment for the loan. Finance $ 750.000 for a warehouse with a 9.50% 30 year loan.
asked by Andrew 
algebra URGENT HELP
7x6 greater than or equal to 3x^2 reduced and written in interval notation
asked by zachary 
American History
What principles of American foreign policy did the Berlin airlift put into action? What do you think might have happened if the U.S. and Britain had not tried the airlift or if the airlift had failed?
asked by Claire 
College Math
A ice cream shop sells 4 flavors of ice cream, assume that all orders of two scoops are equally likely, what is the probability that in an order of two scoops both are of the same flavor?
asked by Peter 
physics
A piece of iron has a mass of 0.4 kg and is initially at 500 degrees. It is lowered into a beaker with 20L of water at 22 degrees. What is the final equilibrium temperature? Assume there is no heat loss to the environment during the process.
asked by Karthi 
Math
Rewrite in terms of an expression containing only cosines to the power 1. 4 cos^6x
asked by Sarah 
math
Is there a way to prove this in upwards of 5 steps? Apparently there is?? Prove. 2^n + 2^n = 2^(n+1) I posted this before however apparently I need something more indepth in terms of the # of steps.
asked by Joshua 
st joseph school
when a traffic light turns green, a car accelerates at a constant rate, the decelerates in the same manner to stop at the next traffic light. The speed of the car, s, is given by the equation, s=10 /t8/ + 80 where t is time. Find the time , t, it takes
asked by cj 
Chemistry
What is the solubility (in g/L) of PbCl2 at 25 degree celsius? The solubility product of PbCl2 at 25 degrees celcius is 1.6x105.
asked by Patrick 
Chemistry
2C2H6+7O2=4CO2+6H2O how many moles of H2O are produced when a mixture of 0.427 moles of O2 and 0.150 moles of C2H6 is burned, iv already found moles of H2O for them separately.
asked by Angela 
math
The value, V, of a $25000 vehicle after y years is given by V = 25000 (0.85)y What is the rate of depreciation? (1 mark) What will the car be worth after 5 years? (1 mark) To the nearest month, how long would it take to reduce the vehicle’s value to 10%
asked by Matthew 
math
Give an example of a logarithmic equation that cannot be solved and explain why it cannot be solved. (3 marks)
asked by Jonathan 
Finance
I need help with the following question. I have already answer question 25 and 26 so I need the following: Text Book Fundamentals of Corporate Finance After you have completed your income statement and balance sheet, compute the following financial ratios
asked by Snowflake 
physics(electric forces)
how do i figure out if an electric force between 2 stationary points are positive or negative?
asked by vii 
Chem
What is the maximum Cu2+ concentration possible in a solution that has a 7.4 E 5 M sulfide ion concentration without precipating CuS? For CuS, Ksp= 6.0 E 36
asked by Nick 
Physics
Difference between parallel coplanar forces and non parallel coplanar forces
asked by Ayo 
CHM
How many liters in volume are occupied by 250 liters of bromine at STP?
asked by Anonymous 
English paper 3
An discursive essay of this topic , both parrents should assume equal responsibility in raising a child,agree or dis agree
asked by Martin 
English paper 3
Write a dialogue in wich you convince your teacher that you are too sick to participate in sports for thed day
asked by Martin 
engineering mechanics
A vehicle on a monorail has a speed S = 10 m/s and an acceleration S=4m/s 2 relative to the ground reference XYZ when it reaches point A. Inside the vehicle, a 3 kg mass slides along a rod which at the time of interest is parallel to the X axis. This rod
asked by kuldeep 
Chemistry
In which of the following solution would CaC2O4 have the highest molar solubility? Please help. A) 0.01 M NaCl B) 0.01 M H2C2O4 C) 0.01 M Na2C2O4 D) 0.01 M NaHC2O4 E) 0.01 M HCl I think it is E because it is a strong acid and will completely dissociate..
asked by Felix 
math
1/xc^2+b/x(c+x++5/x^2c^2 I need to know how to solve this.please help.
asked by tala 
chemistery
Cr + Sn2+ help me balance
asked by dug 
Chemistry
Calculate the molar concentration of uncomplexed Zn2+ (aq) in a solution that contains 0.22 mol of Zn(NH3)4 2+ per liter and 0.3109 M NH3 at equilibrium. Kf for Zn(NH3)4 2+ is 2.9 X 10^9 I started this way... (0.3109 + 4)2/0.22x)= 2.9 X 10^9 I'm lost and
asked by Felix 
Physics
Let ø>=(1−i)/2 0> −(1+i)/21> and ϕ>=(2+i)/30>2i/31>. What is ?
asked by Quantum Physics 
Physics
A pinhole camera has a small circular aperture of diameter D. Light from distant objects passes through the aperture into an otherwise dark box, falling on a screen at the other end of the box. The aperture in a pinhole camera has diameter D = 0.600 mm.
asked by Ken 
quesssstion!!
Why did the british exercise restraint in their effrts to defeat the rebellious colonies?
asked by Anonymous 
math
10^(10log3) How to solve this???
asked by Nathaniel 
QP
What is the superposition that results if you apply the Hadamard transform H⊗n to the state 12√(0n⟩+1n⟩)?
asked by oye lucky 
physics
A Fletcher's trolley is set up over a cliff. If m1 = 40.5 kg (on top of the cliff) and m2 = 18.5 kg (hanging over the edge), what coefficient of friction is needed for the system not to move?
asked by po 
Chemistry
Calculate the concentration of ions in the following saturated solutions. (a) [I −] in AgI solution with [Ag+] = 8.1 109 M (b) [Al3+] in Al(OH)3 solution with [OH −] = 1.8 109 M
asked by Anonymous 
money and banking
Suppose that the Fed's inflation target is 2%, potential output growth is 3.5%, and velocity is a function of how much the interest rate differs from 5%: % triangle v=0.5 x (i5) Suppose that a model of the economy suggests that the real interest rate is
asked by Anonymous 
Algebra 2
Sidewalk of uniform width has area of 180 ft squared and is surrounded ny a flower bed that 11 ft wide and 13 ft long. Find the width of the sidewalk?
asked by Jo 
CHEMISTRY
WHAT IS ATOMICRADIUS
asked by STEPHEN 
Statistics
Problem During the dinner hour, the distribution of the interarrival time of customers at a restaurant is estimated to be as shown below. The mode of payment and the service times of the cash and credit card customers are shown in the following tables.
asked by Anonymous 
Math PLEASE HELP
MS Wilkens went to the gas station to fill her car. Her gas tank is 20% full. The cost of gas is $4.29 per gallon. How much will itcost to fill the tank? Use the conversion 1 gallon=231 in cubed. They showed a pic. of a tank with length=1.75ft width=1.25
asked by Bri 
Physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of
asked by Ashley 
Physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of
asked by Ashley 
Physics
A block of mass m1 = 5.0 kg is released from A, at a height h = 9.0 m. It makes a headon elastic collision at B with a block of mass m2 = 11.0 kg that is initially at rest. Calculate the maximum height to which m1 rises after the collision. the track is
asked by Anonymous 
Physics
A 5.81 105 H solenoid is constructed by wrapping 62 turns of wire around a cylinder with a crosssectional area of 8.20 104 m2 When the solenoid is shortened by squeezing the turns closer together, the inductance increases to 8.94 105 H. Determine the
asked by Ashley 
math
What is the exact circular function value for tan pi/4
asked by amina 
mathsprobabilty
A chairman is biased so that he selects his relatives for a job 3 times as likely as others. If there are 3 posts for a job. Find the probability distribution for selection of persons other than their relatives.
asked by anoynomous 
Quantum physics
Suppose Alice has three qubits in the state α000>+β111>. If she sends these qubits to Bob by applying the teleportation protocol to each of them separately, what is the state that Bob receives?
asked by gluck 
literature
If you consider The Call of the Wild to be an allegory, which one of the following statements would be true?
asked by Anonymous 
stats
The amount that airlines speed on food per passenger is normally distributed with means $8.00 and standard deviation $2.00. What is the probability that a randomly selected airline spends more than $12.50?
asked by chris 
business studies
What is the core business activity of nedcor?
asked by tlhamo 
Chemistry
Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 1013) in the developing process for blackandwhite film. What mass of AgBr can dissolve in 1.40 L of 0.425 M Na2S2O3? Ag+ reacts with S2O32 to form a complex ion. Ag+(aq) + 2
asked by Howard 
Chemistry
What volume (L) of 0.256 M potassium hydroxide solution would just neutralize 61.3 ml of 0.167 M H2SO4 solution?
asked by Josh 
Chemistry
Write equations for the stepwise formation of each of the following complex ions. (Type your answer using the format CO2 for CO2, [NH4]+ for NH4+, and [Ni(CN)4]2 for Ni(CN)42. Use the lowest possible coefficients.) (a) Ni(CN)42 (b) Mn(C2O4)22
asked by Howard 
Chemistry
What volume (L) of 0.256 M potassium hydroxide solution would just neutralize 61.3 ml of 0.167 M H2SO4 solution?
asked by Josh 
Math
can someone please correct my mistakes? x/2(3x1)/3 < 1/4 i did: x/2 times 2  (3x1)/3 < 1/4 times 2 (then i crossed out) becomes: x(3x1)/3 times 3 < 1/2 times 3 (crossed them out) = x3x+1 < 3/2 => 2x +1 2x 0.25
asked by Mia 
geometry
In the graph below, what is the line of reflection for XYZ and X'Y'Z'?
asked by TThias 
physics
what is the angle betwean x axis and vector 3i2j+4k
asked by sandeep upadhaya 
Math
Given that a sample space is discrete if it contains either a finite number of points or a countably infinite nunber of points and a sample space is continuous if it contains uncountable number of points 1) if two distinct points on a circle radius 'r' are
asked by Fibin 
biology
Is pore protein = channel protein?
asked by black_widow 
ENGLISH
How English 002 help me in achieving the T.I.P Graduate Attributes?
asked by :)) 
Trig
How do I find the exact value of sin (pi/24)?I am crying
asked by Luis 
Physics
A potato of mass m is attached to a string of negligible mass and length L. The potato is released from rest from a horizontal position. When the potato is at point p, the string attached to the potato makes an angle θ with the horizontal. In terms of
asked by Jaron 
sociology
An unskilled assembly line worker replacing a skilled carpenter is an example of __________. (Points : 1)
asked by mb 
Chemistry
How many drops (1 drop=0.05mL) of 0.20M KI must we add to 100.0 mL of 0.010M Pb(NO3)2 to get a precipitate of lead iodide to start. Ksp of PbI2=7.1e9. Answer=9 drops. Please show steps.
asked by Cody 
Chemistry
During your titration, you overshot your endpoint and your solution was too pink. Would this lead to a final pKa that was too high or too low? Explain why using chemical reasoning.
asked by Shawn 
algebra
(x,y,z)∈R3 are points that lie on the plane x+2y+3z=78, and lie on the sphere x^2+y^2+z^2=468. The maximum value of x has the form a/b, where a and b are coprime positive integers. What is the value of a+b?
asked by Anonymous 
business
Pikes Peak Harley Davidson. offered to finance a new motorcycle for qualifying customers at 15% downer 7.5% interest for 48 months during July 2009 Rich Martinez was interested in calculate what his monthly payment would be if he bought a $29,386 bike.
asked by k 
maths
When conducting an inferential statistical analysis, and applying a conventional “critical p value” of .05, the odds of making a Type I Error and “rejecting a true Null Hypothesis” is…?
asked by mike 
Chemistry
Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 1013) in the developing process for blackandwhite film. What mass of AgBr can dissolve in 1.40 L of 0.425 M Na2S2O3? Ag+ reacts with S2O32 to form a complex ion. Ag+(aq) + 2
asked by Howard 
College Algebra
a box with an open top is constructed from a rectangular piece of cardboard with dimensions 14 inches by 18 inches by cutting out and discarding equal squares of side x at each corner and then folding up the sides as in the figure. The cost to create such
asked by John 
math
Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.65 times 10^5 watts/cm^2
asked by Andrew 
Math Ms. Sue please
4. Which of the following is true about a trend line for data? (1 point) The minimum data point always lies on the trend line. Every data point must lie on the trend line. The trend line describes the pattern in the data if one exists. The trend line
asked by Delilah 
Physics
Question: Calculate the direction of Earth's magnetic field. 3 components of the magnetic field: Geographic South to North: 0.01670 mT Geographic West to East: 0.002147 mT Up to down (up is the sky, down is the ground): 0.03722 mT Calculating angle East of
asked by Taha 
math
about how many years will it take for $1,800 to reach $2,500 at a simple interest rate of 4%?
asked by monie 
maths
Given that a,b,c >0 Prove : (a/b + b/c +c/a)(b/a +c/b +a/c)>0
asked by black_widow 
math
if a triangle has legs of 9in. and 12in. What is the length of the hypotenuse
asked by Janis 
math
Is it possible to set up a time to do a live chat with a tutor here? like for 1520 min or so. I have a few questions, nothing major but would like to have answers explained to me/ any additional questions I have. Would be cool, i understand it is asking
asked by Joshua 
Any one! Please Help!
Why did the british exercise restraint in their effrts to defeat the rebellious colonies? can someone give me an accurate brief description! i don't have my text book! please help me!
asked by Anonymous 
maths
Prove : (a^2+b^2+c^2+d^2)(1/a^2+1/b^2+1/c^2+1/d^2)greater equal to 16
asked by black_widow 
HSC/514
I have to choose a healthcare organization and discuss the accountability, internal and external factors I know how to do the assignment. I need to know how to find the names that would have the information available online. what would I google for?
asked by Mary 
MATHS
A WORM EATS THROUGH BOOK COVERS WHICH IS .4 AND THE PAGES ARE .4 HOW MANY PAGES ARE THERE PLEASE HELP
asked by Anonymous 
physics
A 740 N student stands in the middle of a frozen pond having a radius of 4.8 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 2.8 kg physics textbook
asked by wendlen 
math
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 145 and a variance of 25. The material is considered defective if the breaking strength is less than 134.5 pounds. What is the probability that a single,
asked by buffy 
math
Simply each expression. Use only positive exponents. (2t)^6 r^5/g^3
asked by carly 
hs geometry
to find the height of a tree, a student 53 inches in height measures the length of the tree's shadow and the length of his own shadow. The student casts a shadow 63 inches in length and the tree casts a shadow 67 inches in length
asked by joan 
English
I need a topic for my english class. It should be informative something that the audience would like to know about. Any ideas what i should write about?
asked by Darcy 
physics
A skier is going down a hill with a coefficient of friction of 0.21 and an angle of 7.5 degrees. if the skier has an initial velocity of 30 m/s, how fast will she be going after 10 s
asked by po 
Chemistry
how many grams of ammonium sulfate is formed from the complete reaction of 700 grams of ammonie
asked by Stephanie 
Economics
Suppose two passengers end up with a reservation to Los Angeles. Two alternatives are proposed: a. Toss a coin b. Sell the ticket to the highest bidder Compare the two options from the standpoint of efficiency and equity.
asked by Teresa 
physics
A 5.9 g coin sliding to the right at 23.4 cm/s makes an elastic headon collision with a 17.7 g coin that is initially at rest. After the collision, the 5.9 g coin moves to the left at 11.7 cm/s.Find the amount of kinetic energy transferred to the 17.7 g
asked by wendlen 
MATHS
PAT FAMILY HAS 7 MEMBERS. EACH MEMBER SPENDS $10.00 TO ENTER A CINEMA.THEY MET 3 FRIENDS AND BOUGHT LUNCH FOR EVERYONE AT 9.95 EACH.CALCULATE THEIR TOTAL BILL.
asked by fred 
Science
How does the position of Earth's axis at the March and September equinoxes compare to its position at the summer solstice?
asked by Stephanie 
math 5th grade
fay is making 13 bows to sell at the annual craft fair. she has 36 feet of ribbons to make her bows. if each bow requires 2 and 1\4 feet of ribbon,how much ribbon will not be used
asked by Anonymous 
algebra
3x+6 over 4x+12 divided by x^24 over x+3
asked by filiz 
Math
2x/5  3x +2 >= ( greater than or equal) x1 My answer was x is less than or equal to 7.5 but im not sure
asked by Karen 
physics
Consider a pendulum of length 4.720 m. The acceleration of gravity is 9 . 832 m / s 2 . a) What is its period at the North Pole? Answer in units of s 009 (part 2 of 6) 10.0 points b) What is its frequency? Answer in units of Hz
asked by scott 
math
Erika spent 3/4 of her money on lunch. She has 2.00 left. How much money did she start with?
asked by Tinesha 
Chemistry
For the reaction: 2HCl + Na2CO3→ 2NaCl + H2O + CO2 how much CO2 is produced at STP if 18.5 L of 1.15 M Na2CO3is used? The molar mass of Na2CO3is 106.01 g/mol. I know I have to use stoichiometry and possibly PV=nRT but I don't know what to use first. Do I
asked by Kelly 
chemistry
how do I calculate the mass of ammonium sulfate formed from the complete reaction of 700 grams of ammonia?
asked by Stephanie 
math
Find the base of a triangle whose area is 60in squared and whose height is 6 inches I did 1/2 bh=A 60=3b so b=60/3 b=20 then check so A=1/2bh A=1/2(20)6 A=1/2(120) A=60in squared is this correct?
asked by Liz 
history
Muslims gained military ideas during the Crusades. How was this a positive effect?
asked by jen 
accounting
An organization that does not require precise measurements of the use of services probably would allocate its service center costs by: A. using some form of the step method. B. applying the direct method. C. each revenue center's ability to absorb the
asked by Mag 
Chemistry
Suppose 50.00 mL of 2.0 E 5 M Fe(NO3)3 is added to 50.00ml of 2.0 E 4M KIO3. Which of the following statements is true? For Fe(IO3)3, Ksp= 1.0 E14 aprecipate forms because QcKsp cNothing happended dNo precipate forms because Qc
asked by Patrick 
math
There is a picture with stacked cubes that are each 2inches. + ++ +++ ++++ +=the pic i have of cubes=(+=2in cube) Each side of a cube in the diagram measures 2 inches. What is the total surface area and volume of the solid? I did A=s squared A=2 squared A=
asked by ES 
SPANISH 2 HELP
Will someone check my anwsers? Thanks ¿Quién te sacó estas fotos? A. Julio me los sacó. B.Julio te las sacó. C.Julio me las sacó. ¿Quién les mandó estas flores a Uds.? A.Ceci nos los mandó. B.Ceci nos las mandó. C.Ceci se las mandó. ¿A quién
asked by Jessica 
Spanish 2
Double Object Pronouns. Sustituya (Substitute) los complementos directos e (and) indirectos por sus respectivos pronombres. Modelo: Alberto le sirvió café a Jimena. Alberto se lo sirvió. Can you please check my anwsers for these sentences? Gracias!
asked by Jessica 
Mathematic
integral cos^2 3x . sin^4 3x dx
asked by Intan 
Calculus
A car accelerates from rest at the rate of 1.4 + 3 (root)t mph per second for 4 seconds. How far does the car travel in those 4 seconds?
asked by ANR 
Chemistry
Is the dissolution of calcium sulfate endothermic or exothermic? How do you know?
asked by Chris 
Business studies,economic,accounting. Maths lit
Examples of corporate social responsibility involvement by anglo american, nedcor and absa
asked by Nthabiseng 
world history
Within slave society, evidence suggests that the highest social status was ascribed to
asked by Anonymous