Questions Asked on
April 11, 2011

chem
write the ionic equation and the net ionic equations. 1.AgNO3 and K2S 2.ZnCl2 and Na2SO4 3.CuCl2 and Li3PO4
asked by yesi 
math
The formula T=2*pi*sqrt[L/32] gives the period of a pendulum of length l feet. The period P is the number of seconds it takes for the pendulum to swing back and forth once. Suppose we want a pendulum to complete three periods in 2 seconds. How long should
asked by Gabi 
Calculus (please help I really need to check this)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the crosssectional area is A, determine the dimensions of the window which minimize the perimeter.
asked by Katrina 
chemistry
How many moles of carbon monoxide are needed to react completely with 1.75 moles of iron oxide? based on this equation: Fe2O3(s)+3CO(g)>2Fe(s)+3CO2(g)
asked by Jane 
Math
A gardener wants to fence the largest possible rectangular area using 200 yards of fencing. Find the best length and width of the garden.
asked by math student 7 
physics
A 32 g ball rolls around a 40 cm diameter Lshaped track, shown in the figure below, at 60 rpm. Rolling friction can be neglected. What is the magnitude of the net force exerted on the ball?
asked by Anonymous 
Chemistry
Can you help me with solving this? I don't just want the answer,but how to do it. The average distance between Mars and Earth is about 1.3 108 miles. How long would it take TV pictures transmitted from the Viking space vehicle on Mars' surface to reach
asked by Alex 
english
need help with this Nominative Absolutes sentence "The town held a festival because the harvest had been so large.". is this right? The town held a festival the harvest been so large.
asked by bill 
Math
The area of a photograph is 15 square inches. If the width of the photograph is 3 inches, what is its length?
asked by Summer 
Buffer
You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?
asked by Nicole 
science
what is the difference between a meteor and a meteorite?
asked by nicole 
Organic Chemistry III
What is a Chaser Solvent?
asked by Amandla 
English
Can you please check the following story, especially the part included in brackets.Thank you very much. 1) Someone had stolen a ring from Peter William’s bedroom. Mr William lived on a farm with 6 servants. 2) No one had visited the farm so one of the
asked by Mike1 
chemistry
One handbook lists a value pKb= 9.5 for of quinoline,C9H7N , a weak base used as a preservative for anatomical specimens and to make dyes. Another handbook lists the solubility of quinoline in water at 25degree celsius as 0.6g/100mL. calculate the pH of a
asked by chips ahoy 
math
Colin is working to earn some money for a new cd player. On Saturday he earned half as much as he did on Sunday, but twice as much as he did on Friday. During those three days he earned $70. How much did he earn each day?
asked by madison 
Accounting
A company just starting a business made the following four inventory purchases in June: June 1 150 units $390 June 10 200 units 585 June 15 200 units 630 June 28 150 units__ ____
asked by Sah 
Chemistry
A flask partially full of liquid water is heated to boiling and capped cold water is poured over the flask. The water boils even more vigorously explain
asked by Noel 
chemistry
A particular vinegar is found to contain 5.8% acetic acid,CH3COOH , by mass. What mass of this vinegar should be diluted with water to produce 0.750L of a solution with pH= 4.54?
asked by papermate 
physics
You have a 0.35 long pendulum attached to the roof inside your car. Your car is travelling at a speed of 1.0 m/s when it hits a concrete wall and stops immediately. If the pendulum is free to swing, to what maximum angle to the vertical does the pendulum
asked by Suhindar 
physics
a body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (pt). The magnitude of the acceleration (in m/s2) of the body at t = 1.0 s is approximately a. 3.5 b.14 c.43 d.4.3
asked by eugene 
physics
An ice skater has a moment of inertia of 2.3 kg * m^2 when his arms are outstretched and a moment of inertia of 1.0 kg * m^2 when his arms are tucked in close to his chest. If he starts to spin at an angular speed of 2.0 rps (revolutions per second) with
asked by Dorian 
analytic geometry
The line joining (3,10) and (4,3) is divided in what ratio by the point (1,8)?
asked by Aumi 
Statistics
At a local manufacturing plant, employees must complete new machine set ups within 30 minutes. New machine setup times can be described by a normal model with a mean of 22 minutes and a standard deviation of four minutes. b. The typical worker needs five
asked by Anonymous 
statistics
At a local manufacturing plant, employees must complete new machine set ups within 30 minutes. New machine setup times can be described by a normal model with a mean of 22 minutes and a standard deviation of four minutes. a. What percent of new machine
asked by Anonymous 
chemistry
15.45 grams of solid potassium chlorate decomposes when heated to form potassium chloride and oxygen gas. assuming 100% yeild how many grams of solid potassium will be produced?
asked by mary 
science
Table salt has a solubility of 36 g of salt in 100 g of water at 40°C. If 15 g of the salt are added to 50 g of water at the same temperature, is the resulting solution saturated or unsaturated? Explain your answer.
asked by David 
physic echooo
A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than to the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 2.4 s after the first, and
asked by kya 
CALCULUS
3.Using the curve that you constructed for the decomposition of Carbon 14, find the age of a prehistoric cave painting discovered in the Lascaux Caves in southern France if the amount of Carbon 14 has decayed to 14.29%
asked by Pera 
fizik
Two shuffleboard disks of equal mass, one orange and the other yellow are involved in a perfectly elastic glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving initially to the right at 7.00 ms"1. After the
asked by alya 
Hybrid
How to reduce global warming? One effect of global warming?one affect of reducing carbon dioxide production? Please help thanks. :)
asked by Homework 
Phys
A 120V rms voltage at 2000 Hz is applied to a 6.0mH inductor, a 2.0ìF capacitor and a 200Ù resistor. What is the rms value of the current in this circuit?
asked by Rusty 
Physics
A skier of mass 73.5 kg is pulled up a slope by a motordriven cable. How much work is required to pull the skier 58 m up a 32° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?
asked by Elizabeth 
statistics
A friend offers you the following game: You will roll 2 fair dice. If the sum of the two numbers obtained is 2,3,4,9,10,11,or 12 the friend will pay you $20. However, if the sum of the two numbers is 5, 6,7, or 8, you pay your friend $20. This friend
asked by Sarita 
Physics
A 200Ù resistor, 40.0mH inductor and a 2.00ìF capacitor are connected in series with a 120V rms source at 1000 Hz. What is the phase angle of this circuit?
asked by Alex 
statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their
asked by nikki 
computer science
to find all individuals whose name is Tom or tim, enter______ in the criteria row of the appropriate column. a. T?m B.T#m C.T$m D.T&m
asked by nastassia 
mathtrue/false
An isometry preserves distance. True False true?
asked by danny 
math 5th grade
Henry bought 1 liter of fruit juice. He kept 1/4 liter of it in a bottle & poured the remainder equally into 6 cups. How much fruit juice was there in each cup? Give the answer in liters? **Plz show me how to solve the problem and the answer would be great
asked by litzy 
physics
Two charges are located along the xaxis. One has a charge of 6.2 µC, and the second has a charge of −3.1 µC. The Coulomb constant is ke = 8.98755 × 10 9 N m2 /C 2 The acceleration of . gravity is 9.81 m/s 2 . If the electrical potential energy
asked by Jack 
english
In the book The devil's arithmetic, what are two symbols?
asked by mickey 
Math
Find an equation of aline that is tangent to the curve f(x)+2cos3x and whose slope is a maximum?? Pleasee help!!
asked by Sima 
Maths
Solve the initial value problem (dx/dt)+2x=cos(2t) with x(0)=5
asked by chris 
physics
The phase angle of an RLC series circuit with an inductive reactance of 200 Ù and a capacitive reactance of 100 Ù is 40.0°. What is the value of the resistor in this circuit?
asked by Sam 
Art Project
I have to do an art project for my art class and I am having trouble thinking of an idea. My art project has to be "shock art" its almost like DaDa but its got to be shocking. I can paint it, draw it, make a collage, or just put pictures
asked by Samantha 
statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their
asked by nikki 
ORGANIC CHEM I
hOW MANY POSSIBLE STEREOISOMERS DOES MENTHOL HAVE ?
asked by JAM 
fizik
Two shuffleboard disks of equal mass, one orange and the other yellow are involved in a perfectly elastic glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving initially to the right at 7.00 ms"1. After the
asked by alya 
fizik
b) A ball of mass 3.5 kg starts from rest and slides down a rough inclined plane 60 cm long in 0.6 s. i) Calculate the net force acting on the object along the inclined plane
asked by mimi 
math
a certain company makes inflatable swimming pools that come in four rectangular sizes.the length of each pool is twice the width and twice the depth.the pools are 1 foot ,2 feet,3 feet and 4 feet deep.what is the area of the surface of tge water of each
asked by bianca 
algebra 1
What is a10 for the sequence (an) = 1 + 3 (n  1)? i go 28 is that correct? What is a7 for the sequence an = 2 + 5(n  1)? i got 51 is that right 6x+7/5 = x, how do i find x? 30x/10 = 2, what's the next step in solving this equation?
asked by jianna 
statistics
A survery of 80 randomly selected companies asked them to report the annual income of their presidents. Assuming that incomes are normally distributed with a standrad deviation of #30,000, determine the 90% confidence interval estimate of the mean annual
asked by shani 
Math
A river flows at the rate of 2 mph. If a motorboat can travel 12 miles upstream and return in a total of 2.5 hours, what is the speed of the motorboat in still water?
asked by Anonymous 
college
The width of a rectangle is 25% of the length. The perimeter is 250 cm. Find the width and the length of the rectangle.
asked by Bianca 
chemistry
A 625mL sample of an aqueous solution containing 0.275 mol propionic acid (CH3CH2CO2H),has [H30+]= 0.00239M. What is the value of Ka for propionic acid?
asked by papermate 
statistics for the behavioral and social sciences
Using a t test for dependent means based on .05 significance level, what is the power of each studies. Study Effect size N Tails (a) Small 20 one (b) Medium 20 one (c) medium 30 one (d) medium 30 two (e) large 30 two
asked by chuckris 
Accounting
CostVolumeProfit Analysis and DecisionMaking In order to recover from the recent operating losses that the Biggie Widget Company has experienced, management has made some tentative new decisions and believes that the use of CVP analysis will be useful
asked by jim1 
chemistry
What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom salts, MgSO4 x 7H2O? Give your answer in grams. please help
asked by Jess 
physics
You wish to accelerate a small merrygoround from rest to a rotational speed of onefourth of a revolution per second by pushing tangentially on it. Assume the merrygoround is a disk with a mass of 150 kg and a radius of 1.80 m. Ignoring friction, how
asked by Dorian 
physics
"The mass density of brain matter is 1.040 g/cm^3, and of that, the mass fraction which is hydrogen, is 0.107. Find the number of hydrogen protons in a volume of 1cm^3 of brain tissue"
asked by stephanie 
statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their
asked by nikki 
Algebra
If x^2+bx+c is factorable and c is negative, then the signs of the last term factors of the binomials are opposite, why? I x^2+bc+c is factorable and c is positive, then the signs of the last term factors of the binomials are the same, Why? Am not
asked by Amy L 
Lotto 5/90 maths
35 7 85 33 40  60 74 25 19 2 what will this game produce for the next lotto game
asked by Sunny 
physics
1) When electrons are forced away from a/an ___ plate, work is done. Is "positive" a possible answer? 2) Any pointed or angular surface of an object must have a/an ___ concentration of charge to establish equilibrium. Any ideas?
asked by help me please 
chem
Osmolarity (Osm) is the molar concentration of the particlesmolecules and/or ionsin a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same
asked by Anonymous777 
chem
Osmolarity (Osm) is the molar concentration of the particlesmolecules and/or ionsin a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same
asked by Anonymous100 
English
1. His face turned red. 2. His face turned like red. 3. He looks pale. 4. He looks like a poet. (I thinks #3 and #4 are correct. What about #2? Is it correct or wrong?)
asked by rfvv 
spanish
fill in the blank ?es el libro _____profesor? no, es mi libro. la clase ____ profesor de español es muy interesante. la mochila _____muchacha es rosado. yo soy ___ estados unidos. ?son los bolígrafos de teresa? no, son ____ profesora. please help
asked by natasha 
Physics
A person doing a chinup weighs 710 N, disregarding the weight of the arms. During the first 26.5 cm of the lift, each arm exerts an upward force of 356 N on the torso. If the upward movement starts from rest, what is the person's speed at this point?
asked by Elizabeth 
Maths: Algebra Matrices Class 12th
matrix{{0, 1, 1}, {2, 1, 3}, {1, 1, 1}} matrix{{1, 1, x}} matrix{{0}, {1}, {1}}=0 Find the value of x Don't give me the direct answer. Please tell me how to go about this. Draw in your notebook and then solve
asked by Akash 
fizik
please help.. i really need the answer as soon as possible.. Two shuffleboard disks of equal mass, one orange and the other yellow are involved in a perfectly elastic glancing collision. The yellow disk is initially at rest and is struck by the orange disk
asked by irna 
English
A major part of Chapters 8 – 14 is Huck’s adventure on the WALTER SCOTT. Huck mentions that he wishes the Widow Douglas could know about his efforts to save the men on the wreck. Pretend that you are Huck and write a letter to the Widow, explaining the
asked by ELIZA T. 
chemistry
A gas has a volume of V1 = 550 mL. If the temperature is held constant, what volume would the gas occupy if P2 = 22 P1?
asked by John 
maths
There are 24 people in my class. Four of the don't play sport, 14 play volleyball and 11 play hockey. How may people play volleyball and hocket? A 3 B 6 C 5 D 9
asked by dhruv 
Physics
A 1440kg crate of cabbages is laid on a level, frictionless track at the end of a heavy spring. The spring is compressed a distance of 0.100 m by a force of 83500 N. When the spring is released, it propels the crate. the spring constant of the spring
asked by Kristen 
Chemistry
ROH + TsCl + pyridine > ROTs + Cl: For the reaction, what is the function of pyridine? The pyridine is on top of the arrow in the question. a)Serves as a lewis base, stabilizes transition state. b)Serves as a cofactor,complexes with the alcohol.
asked by Jules 
physics
Forces of 3 N and 4 N act the right angles on a block of mass 5 kg. Show that the resulting acceleration is 1 m/s².
asked by Anonymous 
Chemistry
A 0.225g sample of a weak monoprotic acid requires 37.50 mL of 0.100 M NaOH solution to reach the equivalence point. What is the molar mass of the acid?
asked by Sarah 
Chemistry
Calculate the specific heat capacity of H20(liquid) in (Joules/mole* degrees celcius)
asked by Seannnny 
Spanish 8Please check
1.Which one is correct? Tocamos el piano. Jugamos el piano. Tocamos al piano. I think it is the Tocamos el piano because if it was jugamos then it would have to have "al" in front of piano. Piano is masculine so it couldn't be Tocamos al piano. 2. Which is
asked by Melissa 
Maths
Solve the initial value problem 10(t+1)(dy/dt)+9y= 9t for t > 1 with y(0)=15
asked by Lisa 
chemistry
What mass of benzoic acid CH6H5COOH, would you dissolve in 400.0 mL of water to produce a solution with a pH= 2.90? Ka= 6.3 x 10^5 mass in grams is needed.
asked by papermate 
ORGANIC CHEM I
A PROCESS THAT INVOLVES SYMMETRICAL BOND BREAKING AND BOND MAKING IS A(AN) ?
asked by JAM 
Chemistry
What is the de Broglie wavelength of a proton that has a mass of 9.11 x 10^31kg and travels a distance of 13km in 0.025 s? (h=6.63 x 10^34 Js)
asked by Sapphire 
chemistry
The pH of saturated is found to be 13.12. A 15.0mL sample of saturated Sr(OH)2 is diluted to 250.0mL in a volumetric flask. A 15.0 mL sample of the diluted Sr(OH)2 is transferred to a beaker, and some water is added. The resulting solution requires 27.6mL
asked by chips ahoy 
Math
how would I make a tslly table for the number of students in th third, fourth, and fifthgrade classes: 26, 25, 27, 27, 26,28,27
asked by Jake 
physics/ help
a stack of seven identical aluminum blocks, each of length l = 17.1 cm and thickness d = 1.8 cm, stacked on a table. (a) How far to the right of the edge of the table is it possible for the right edge of the top (seventh) block to extend? (b) What is the
asked by I need help please!! 
physics
Suppose a spherical planet P has a uniform density of 4.96*10^3 kg/m^3 and a radius R=1904 km. For a parcel that weighs 73 N on the surface of the (spherical) earth, what is A) gp/ge and B) its weight on the surface of P? Using the "tunnel mail" system
asked by Mudoh 
Math
Find each unit price and tell which is the better buy. A 1/2pound hamburger for $3.50 ; a 1/3pound hamburger for $3.25
asked by Amy 
math
The ratio of the corresponding sides of two similar triangles is 3:2. The sides of the larger triangle are 15 cm, 24 cm, and 27 cm. What are the lengths of the sides of the smaller triangle?
asked by Kylie 
math
Keith is wrapping ribbon around a cylindrical vase he will need additional ribbon to make a bow the vase has a volume of 602.88 cubic inches the bow requires 3 feet of ribbon to the nearest inch what is the least amount of ribbon including the bow does
asked by tamara ivory 
calculus
An airplane at a height of 2000 meters is flying horizontally, directly toward an observer on the ground, with a speed of 300 meters per second. How fast is the angle of elevation of the plane changing when this angle is 45 degrees?
asked by Alan 
Maths
Solve the initial value problem (dy/dt)+2y=15 sin(t)+15 cos(t) with y(0)=3
asked by chris 
spanish
miro ______ pizarra. what goes in the blank? voy _______ escuela. voy__________ laboratorio. escucho ___ profesor cuando el habla miro ____ alumno guapo. :)
asked by natasha 
physics
We couldn't find "The mass density of brain matter is 1.040 g/cm^3, and of that, the mass fraction which is hydrogen, is 0.107. Find the number of hydrogen protons in a volume of 1cm^3 of brain tissue"
asked by stephanie 
physiology
How is this hormones regulated: hypothlamus/pituitary axis, nervous system,feedback inhibition indicate which? 1. Follicle stimulating hormone 2. Cortisol 3. Antidiuretic hormone 4. Parathyroid hormone 5. Thyroidstimulating hormone 6. Insulin 7.
asked by ivy 
math
a company bought 50lb of kona beans at $34.95 per lb. and plans to mix these with colombian beans at $7.99 per lb. wholesale. If they want the blend to be $11.95 per lb, how many lbs of colombian beans should they buy?
asked by Shelly 
chemistry
how much calcium oxide is recovered when 250 g calcium hydroxide are heated given the following reaction? Ca(OH)2 arrow CaO + H2O
asked by cam 
PHYSICS
In the Bohr model of the hydrogen atom, the electron makes 6.00×10^15 rev/sec around the nucleus.What is the average current at a point on the orbit of the electron?
asked by Mattie 
Spanish 8th grade Please check
Which of the following is correct? Mis hermanos tocan a la guitarra. Mis hermanos tocan la guitarra. Mis hermanos juegan la guitarra. I think it is "Mis hermanos tocan la guitarra."
asked by Melissa 
192
a pizza has a radius of 9inches. the pizza is divided into sections. one of the section has a central angle with a measure of 60 degrees wat is da area of this section of pizza? what happens to the area of the sector if u double the central angel? how much
asked by kelvin 
psy
How will the use of Ashford’s Online Library aid you in finding credible resources to support your academic writing?
asked by Kimberly 
Math
Harry planned a rectangular garden that was 40 feet long and 10 feet wide 1.What was the perimeter,in feet,of the garden that Harry planned? 2.What was the area,in square feet,of the garden that Harry planned? 3.Suppose Harry decided to change the shape of
asked by Frances 
Calculus
find the volume of the region bounded by y=e^x, y=0, x=1, x=1 rotated about the x axis
asked by Anonymous 
math
A standardized test is designed so that scores have a mean of 50 and a standard deviation of 4. What is the probability that a test score is above 54?
asked by wendy 
math
A typical graph sheet is 18cm by 24cm. The smallest square on the sheet has an area of 1mm^2. How many of these 1mm^2 squares are on the sheet of graph paper?
asked by Rebecca 
math
on the fastest speedways, some drivers reach average speeds of 2 miles per minute. write the formula that gives the number of miles M that such driver would travel in x minutes. How would this driver travel in 37 minutes
asked by Joe 
algebra
how to arrange the terms of a polynomial so that the powers of x are in decending orders
asked by kurtreece 
maths
the product of 4 prime numbers is 2145. the product of two of them is 65. the sum of the other two must be: A 16 B 8 C 24 D 14 give me direct answe A B C or D
asked by dhruv 
Calculus
I don't know how to do the integral of e^(lnx^2)dx and the integral of (sin sqrtx)/(sqrtx) dx
asked by Leanna 
chemistry
Due to increased CO2 in the atmosphere, the pH of rainwater is more acidic than in the previous century. Use the following data to calculate the pH of unpolluted rainwater at 25°C: vol% in air of CO2 = 0.033; solubility of CO2 in pure water at 25°C and 1
asked by jerry 
English
Can you please check these sentences for me? Thank you very much. 1) Storm wants to borrow Rob's bicycle pump because she wants to train for the triathlon. 2) In the beginning she didn't want to race (for the triathlon) but then she changed her mind. She
asked by Mike1 
algebra
The length of a rectangle is 5ft less than twice its width. The area of the rectanle is 75ft^2. Find the length of the rectangle
asked by Renee 
art appreciation
What were the chief problems of construction involved in raising the dome of the Florence Cathedral in an age that did not have today's building technologies?
asked by Alice 
Calc
[9:52:53 PM] Pardeep Narang: y''+2ty'−4y=8 y(0)=4 y'(0)=0 i need to solve this using laplace transforms
asked by Mark 
English
I forgot to include the following sentences. I included my doubts in brackets. Thank you. 1) Do you think we could possibly talk through Skype? 2)Let me know when you are available for talking (?) through Skypr. 3) Samantha tried to use a translation
asked by Mike1 
algebra 1
given;n+8(n+20)=110 1;n+8n+20=110 2;9n+20=110 3;9n=11020 49n=90
asked by peter 
geometry
What is the relationships or patterns among regular polyhedrons  tetrahedron, cube, octahedron, dedcahedron and icosahedron regarding their number of faces, vertices, and edges?
asked by suzie 
calculus
log (3x9) = 2log3  log27+ log(x+3) Solving the euqation using the properties of logarithms How do you do this?
asked by Sara 
Geography
Why is the Atacama desert cloudy but dry
asked by Alyonka 
physic
A copper sheet of thickness 2.01 mm is bonded to a steel sheet of thickness 1.07 mm. The outside surface of the copper sheet is held at a temperature of 100.0°C and the steel sheet at 22.9°C. a) Determine the temperature (in °C) of the coppersteel
asked by help me please:(( Urgetnt 
chemistry
caffeine has a halflife of 4.6 hours in the human body.. How long would it take 125 milligrams tritium to decay to 22 milligrams?
asked by cam 
Chemistry
How many mL of Water are made from 4 moles of HNO3?
asked by Alyssa 
Algebra
An airline has implemented a plan to reduce the occurrence of lost luggage. They have observed a linear relationship between the number of months the plan has been in place and the number of pieces of lost luggage. The airline recorded their findings in
asked by Anonymous 
Chemistry
If a researcher needs 0.50 L of 3.0 M nitrite buffer at pH 3.00, then she knows that the concentration of nitrous acid (conjugate acid) plus the concentration of nitrite anion (conjugate base) must equal 3.0 M. She must then calculate the amount of each
asked by Mike 
Maths
Solve the initial value problem (dx/dt)2ty=12t^2e^t^2 and the condition y(0)=3
asked by Lisa 
Physics
Two liquids are in a static equilibrium. Water pw= 998 kg/m^3 is in the right arm. Oil in the other. Given l=120mm and d=15mm, what is the density of the oil?
asked by Hannah 
polynomials
X221x+84=0 that's xsquared (x ? )(x ? )
asked by brian 
finance
1–2 pages Details: Develop a personal financial planning budget. This budget can represent a budget for a fictitious individual; however, make sure you include the following: Information you would need to prepare this budget Income Taxes Expenses
asked by Elizabeth 
physiology
Which might, in theory, be used to combat osteoporosis? Parathyroid or Calcitonin?
asked by ivy 
physics
A trapdoor on a stage has a mass of 20.8 kg and a width of 1.51 m (hinge side to handle side). The door can be treated as having uniform thickness and density. A small handle on the door is 1.41 m away from the hinge side. A rope is tied to the handle and
asked by HELP..HELP!!!!! 
math
What is an equivalent expression of 8 • n  18 + 6  5 • n
asked by colleen 
Chemistry 106
How would you prepare 1.00 liter of a 0.18 M solution of NaOh?
asked by Lexi 
calculus
find the volume of the solid whose cross section is perpendicular to the x axis from isosceles right triangles and has a leg that run from the lines y=x to the line y=.5x
asked by Eli 
Chemistry
Explain how t make 1.5L of a 2.25M solution of H2SO4 from 6.0M stock solution.
asked by Kayla 
Geomatics
After shooting the trailing edge of the Sun on 11 April 2008, the observed clockwise angle from the mark to the edge of the sun is 259 degrees 44 minutes 51 seconds, the latitude is 32 degrees 47 minutes 54 seconds North, the longitude is 079
asked by John  PLEASE Help! 
algebra 2
during the first part of a trip, a canoeist travels 47 miles at a certain speed. the canoeist travels 16miles on the second part of the trip at a speed 5mph slower. the total time for the trip is 4 hours. what was the speed on each part of the trip.
asked by tricia 
scince
A girl lifts a 12 N weight 1.5 meters. How much work does she do on the weight?
asked by autum 
chemistry
which solution would have a high vapor pressure 6.0 M NaCl or 3.0 M LiCl?
asked by Jamie 
analogies
furnace:fireplace::lamp: ? log,street light,light bulb, headlight,candle is light bulb correct?
asked by sally 
3d artplease help
I have to make something that looks edible, but is not. It can be a representation of something real or innovative. I also have to make a package for itsomething that displays and protects. We can use any materials for it. It also has to include either a
asked by Anonymous 
physics
A fixed 0.16 kg soliddisk pulley with a radius of 0.070 m is acted on by a net torque of 5.0 m * N. What is the angular acceleration of the pulley?
asked by Dorian 
statistics
A standardized test is designed so that scores have a mean of 50 and a standard deviation of 4. What is the probability that a test score is above 54?
asked by wendy 
ALGEBRA
FOUND N(A) A={0,1,2,3,4,5,6,7} A={A,C,D,E} A={4,5,...,12,13} A={2,4,6,...,1000} A={0,1,2,3,,...,3000} A={}
asked by Anonymous 
english
why do you think macbeth cannot sleep in the play''macbeth''
asked by ted 
ethics
Can anyone tell me what entitlementbased ethics is? I know it is related to rightsbased ethics, but I still need a definition and resources.
asked by jleigh9 
Algebra
How do you factor a trinomial? Please help.
asked by Cindy S 
Phys
A certain ac signal at 60 Hz is applied across a 40mH inductor and a 200Ù resistor. What is the power factor of this circuit?
asked by Rusty 
math
subtract with or without regrouping...which number can you subtract from 17 w/ or w/out needing to regropu?For which numbers would you need to regroup?
asked by yc 
english
Hi I need some advise on how to avoid sounding like a bibliography essay when I am writing a persuasive essay?
asked by jub 
computer
is there an estimated cost associated with the computer virus, how many computers infected so far?
asked by erianne 
physics
An SUV has a height h and a wheelbase of length b. Its center of mass is midway between the wheels and at a distance αh above the ground, where 0 < α < 1. The SUV enters a turn at a dangerously high speed, v. The radius of the turn is R (R >> b), and the
asked by No idea how to solve !!!! 
PHYSICS
Two waves with different periods are described mathematically by: y3 = (7.0 m)cos[ 2£kt/(3.0 ms)  £k/2 ] y4 = (2.0 m)cos[ 2£kt/(3.1 ms) ¡V 3£k/2] What is the beat frequency for these two waves?
asked by James 
Western Civilization 102
Please interpret what Charles Darwin was talking about: The grounds upon which this conclusion rests will never be shaken, for the close similarity between man and the lower animals in embryonic development, as well as in innumerable points of structure
asked by Willy Wonka 
stats
the distribution of IQscores forms a normal distribution with a mean of 100 and a standard deviation of 15. what is the proportion of the population that has an IQscore greater than 130?
asked by Anonymous 
Chemistry
Could someone answer this question so I understand it. Thanks cyclopentanol > cyclopentane Which of the following sets of reagents could be used to accomplish the above transformation? a)TsCl/Benzene & LiAlH4 b)H2SO4 & H2/Pd c)TsCl/Benzene & KOtBU/BuOH
asked by Jules 
business law
The state of Confusion enacted a statute requiring all trucks and towing trailers that use its highways to use a Btype truck hitch. This hitch is manufactured by only one manufacturer in Confusion. The result of this statute is that any trucker who wants
asked by Kimbry 
algebra
How does the number game work. How does the number game use the skill of simplifying rational expressions?
asked by chris 
compounded continously
Wnat to have $60,000 in an account after 40 years. How much needs to be deposited inthe APR is 16.3% compounded daily?
asked by Anonymous 
physics
Lead is a very dense substance. 12 cm^3 of lead has a mass of 136.8g. Wgat is the density of the lead?
asked by Rebecca 
compounded continously
A saving account earns 4.3% compounded continously. How much needs to be deposit for a $12,000 after 3 years?
asked by Anonymous 
Physics class
When throwing a ball, a pitcher exerts a torque of 150 N m for 0.15 seconds onto their arm before letting go of the ball. With an arm length of 0.9 m with inertia 0.6 kg m2, what is the speed of the ball just after it is released?
asked by M. 
English
Will you please make sure that I have picked out the correct preposition in each sentence? 1. Parts of wrecked ships filled one room. (of) 2. A museum guide spoke to us. (to) 3. During a storm sailors work very hard. (During) 4. Clippers traded with China
asked by Reed 
PENNFOSTER
HI I AM NOW DOING FACILITIES AND STAFF BUT I AM HAVING SOME STRUGGLES WITH NUMBERS 8,9,10, 11,12 I AM ASKING SOME ONE WHO TOOK THIS CLASS TO PLEASE HELP ME
asked by SANDRA 
ALGEBRA
TRUE O FALSE {K,C,R,A}={K,C,A,R} {E,H,A,N}={A,H,E,N} {3,7,12,14}={3,7,12,14,0} {E,R,S,H}=[S,RH,E}
asked by Anonymous 
physics
During peak shopping season at Northbrook Court, an escalator elevates 1233 passengers a vertical distance of 7.43 meters over the course of 30.3 minutes. If the average mass of the passengers is 55.3 kg, determine the power delivered by the escalator to
asked by Elizabeth 
Information Technology
Introduction to Programming Logic Individual Project April 11, 2011 You are part of a team that will design a first generation mobile banking application. The Banking eTeller (BeT) system allows bank customers to perform ATM transactions from their cell
asked by Cheryl 
algebra
write m minus 4 squared as a trinomial
asked by james 
biology
why warning coloration has to come before mimicry?
asked by Anonymous 
College Math
I need help solving this problem, s/5  5/s=0
asked by Leann 
Math
I'm confused on two questions that are kind of similiar: State the slope and yintercept of y= 1/2x I know the slope is 1/2 but I don't know the yintercept State the slope and yintercept of y= 3x4 I know the slope is 3, but I don't know if the
asked by Sammy 
Geography
Why is Roman Catholicism the main religion in Caribbean S. America?
asked by Alyonka 
social studies
what was one of the increased use of the assembly line in the 1920's?
asked by jay 
Math
How many ordered pairs (x, y) of counting numbers (x = 1, 2, 3, · · · , and y = 1, 2, 3, · · ·) satisfy the equation x + 2y = 100?
asked by Ladoo 
physic
For a class demonstration, your physics instructor pours 1.16 kg of steam at 100.0°C over 4.69 kg of ice at 0.0°C and allows the system to reach equilibrium. He is then going to measure the temperature of the system. While the system reaches equilibrium,
asked by help me please 
physics
100g water, need to raise solution of sodiun acetate 20 degrees. how much energy does it require and how much sodium acetate will you need? Enthalpy of crystallisation is 260kJ. How do I work it out?q= Cp n ∆T? Do you use the density of SA any where? it
asked by Jannis 
stereotypes in psychology
are good dancers. drive Hummers. have more fun. are great lovers. cause trouble. are ditzy. are on welfare. live off other people. have hot tempers. are good with money. drink a lot. eat a lot.
asked by kate 
chemistry
A heater caused the temperature of a 550 g Aluminum block to change from 22 degrees C to 145 degrees C. How many calories were required to heat the metal block?
asked by cam 
chemistry
Calculate how many grams of Cu are needed to produce 15L of NO(g). Please help
asked by Alyssa 
French
1. Nous sommes alles faire du ski 2. Nous avons quitte Strasbourg assez tard 3. Nous avons du passer la nuit a Lyon 4. Nous sommes arrives a la montagne seulement samedi 5. Il y avait beaucoup de voitures sur la route 6. Il neigaient 7. La route etait
asked by Anonymous 
physics
The forces acting on the object are 45 n and 60 n acting in the same direction. The friction force between the bag and the floor is 15n. What is the net fore acting on the bag? What is the acceleration of the bag?
asked by Shannon 
JOHN A Macdonald
How do I start biography on him? i want to start out like this Introduce the person by describing something they achieved. so like this The one who created Canada is none other than John A macdonalD????????
asked by Anonymous 
English
I forgot to add the following sentences. I really hope you can have a look at them, too. 1) Rob doesn't want to argue in front of the children. So he asks her to go and have a chat. 2) Storm managed to win the triathlon. Rob lost a lot of time on the bike
asked by Mike1 
science
A laboratory assistant prepared 1 liter of a 40% aqueous sodium Hydroxide solution. how many grams of NaOH were needed to make this solution?
asked by lola 
grammar
Is this sentence punctuated correctly? The oil from Eucalyptus trees, which are native to Australia, is known for its medicinal properties.
asked by Kay 
math
abby has 8 sports cards. she has either hockey or football cards she has 4 more hockey cards than football cards. how many football cards does she have?
asked by esha 
Western Civilization 102
Can someone please interpret Charles Darwin thought and statements for me please: He believed that "As more individuals are produced than can possibly survive, there must in every case be a struggle for existence, either one individual with another of the
asked by Willy Wonka 
Science
We're studying coal right now, and I have to figure which is the most polluting impurity in coal which causes damage to air and water. I'm stuck between sulfur, carbon, and mercury, because they are all damaging, but for different reasons. Which do you
asked by Heather 
maths
would you please give the graphical representation of the region bounded by the line y=x and the parabola y=x^26x10?
asked by arun 
calculus
4(x*3)=2(x4)+25
asked by adam 
Geography
How have conflicts in Colombia affected the economy?
asked by Alyonka 
Languge arts
Who are the major characters in the book MAUS?
asked by Nate 
biology
Compare and Contrast the following thyroid disorders? 1. IODINE DEFICIENCY a. Does it cause goiter (yes or no) b. Is the metabolic too high or too low? (indicate which) c. Effect on TSH levels (will they increase or decrease?) d. What is the most
asked by ivy 
english
what is the subject pronoun for this sentence if_____ went to flatland, you would be very confused.
asked by kim 
chemistry
Idont know a search in jacs or other juornals
asked by shahram 
HS215, Environmental Health
I need this by tomorrow morning,if possible. Describe one of the contemporary models of health from another country, and explain its strengths and weaknesses. About 150 to 200 word. Please and thank you.
asked by Flora 
hca/125
Address the risk factors for arthritis, osteoporosis, and injuries from falls. Incorporate prevention strategies such as proper nutrition (calcium, diet).
asked by Rebecca 
economics
each individual has a budget line which they follow for expenditures. If the income of the individual increases what is the effect of the budget line?
asked by jan 
math
how do you find 1/4 of 48
asked by joshua 
Geography
How is the current government of Argentina different from the government in the 1900s?
asked by Alyonka 
analogies
concert:stage::football game: ? (team/stadium/ field/ quarter back/ arena) i think team can you tell me if that's right
asked by sally 
English
I don't know why but my previous post has been posted twice. The word cockerel is mispelt. I'd like to add the following sentences. Thank you. 1)On our holiday, we stayed in a 5starhotel for four days. The hotel was luxurious, with an indoor and an
asked by Mike1 
math
how do you remember mixed numbers and improper fractions?
asked by ashley 
Algebra
How do you do long division of ((5x^4)2)/(3x^2) _______ 3x^25x^42
asked by Leanna 
software
what is the right age group
asked by Anonymous 
physics
AC power in the United States has 60 cycles per second. What is the period (in seconds) for this current? Round your answer to 3 decimal places.
asked by will 
physics
A car drives 100 meters at 30 degrees north of east, stops, turns to an angleof 210 degrees from the east, and then drives another 60 meters. What is the magnitude of the total displacement?
asked by Mary 
biology
if a man is a hetero zygote for a trait but the woman is homozygous recessive, what are the chances that their children will be homozygous dominant
asked by Confused 
biology
DNA breaks apart when the _________ bonds between bases break??
asked by JJ 
english
what advice does lady macbeth give to macbeth in act2 scene 2
asked by ted 
math
metrics
asked by raelyn 
English
1. The finalists in the chess tournament were her and I. 2. Them and Jack want to go to the circus on Friday night. 3.Sara told him and I about the new restaurant. 4.Did Lawrence read the article about volcanoes to she and her sister. 5.Whom will bring the
asked by Hayley 
Models for Health and Wellnesses
What do I answer? Where do I go for a list of questions?
asked by Flora 
physic
A steel rod of length 1.0000 m and crosssectional area 3.63·104m2 is placed snugly against two immobile end points. The rod is initially placed when the temperature is 0°C. Find the stress in the rod when the temperature rises to 38.9°C.
asked by help me please 
math 4th grade
how do you writ $1,044 in word form.
asked by jazmin 
calculus
xy6=0;(2,3)
asked by nastassia 
Calculus (pleas help I really need to check this)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the crosssectional area is A, determine the dimensions of the window which minimize the perimeter.
asked by Katrina 
analogies
tooth:decay::treestump (grow/die/rot/burn/rust) i think rot is that correct
asked by sally 
maths
simplify 7/8+ (1/3+5/6)
asked by arshi 
Math
What is the value of this expression when x=3?
asked by Lauren 
math
What is 25% of 16
asked by bev 
math
A rectangular prism has a length of x+2, a width of x+1, and a height of 4. The volume of this rectangular prism is 24. What is the length and width of this rectangular prism.
asked by Lia 
art
I have to make something that looks edible, but is not. It can be a representation of something real or innovative. I also have to make a package for itsomething that displays and protects. We can use any materials for it. It also has to include either a
asked by Anonymous 
math
the length of a rectangle is 6 ffet more than twice the width. if the length is 24 feet, what is the width
asked by antonio 
algebra
what is the formula to find the heigh of a trapazoid?
asked by caitlin 
social studies
what are some strategies that have been proposed to child labour?
asked by hi 
Calculus
I need help with integrals and I need help with the problem. Integral of 4/sqrt(x)dx
asked by Leanna 
math
1.xny 2.yuz
asked by frances 
calculus
how do I differentiate the volume equation to find how fast a box is filling with sand if I know the length and width?
asked by cathy 
health
Is there anyone that could possibly help me understand medical terminology? My college course has transitioned to an all online setting with inclass closed book exams. I'm having a hard time understanding the difference in word roots and combining forms.
asked by Becky 
Education
What are some potential problems with teachers allowing students to do hands on projects?
asked by Heather 
physiology
Where is Parathyroid hormone and Calcitonin each synthesize, and by what specific type of cell?
asked by ivy 
chemistry
to protection of alcohol gruop, which one is better.why. trimethylsyllil or TBSCl
asked by shahram 
HR
Looking for help with a PowerPoint.
asked by Vickie 
physics
A door, essentially a uniform rectangle of height 2.00 m, width 0.78 m, and weight 136.0 N, is supported at one edge by two hinges, one 18.1 cm above the bottom of the door and one 181.9 cm above the bottom of the door. Calculate the horizontal components
asked by kim...I need help please!! 
chemistry
which solution would have a high vapor pressure 6.0 M NaCl or 3.0 M LiCl?
asked by Anonymous 
Cultural Diver in the Classrm
When you hear the term culturally different, what group comes to mind first? Describe this group and its looks, language, behaviors, attitudes, and lifestyles.
asked by Anonymous 
computer
is the the trojan virus still existence
asked by erianne 
math
The n th term (Un) of a progression geometric is given by the formula 2(1.1)^n. Find the least value of n such that Un ≥ n
asked by jack 
history
How did the consequences of capitalism lead to communism?
asked by Anonymous 
English
I included my doubts in brackets. I really hoe you can check them, too. 1)Mary uses the internet mainly to carry out school research in History, Geography and Science. 2)Whenever she needs to get (new) information/facts, she looks it up on the net. 3) It's
asked by Mike1 
spanish
mis hermanos y yo tenemos _______ camisas en ______ cuartos.
asked by callie 
English
1. A group of penguins were taking off to the sky. 2. A group of penguins was taking off to the sky. (Which one is right? Do we have to use 'swere' or 'was' here?)
asked by rfvv 
math
4020=50
asked by carlos 
social  totem pole
can you explain the history of northwest coast native art?
asked by kim 
analogies
is this correct clothes:donate::time:spend
asked by sally 
Math graphing
what is the vertex for the equation y = x2 – 4 and how did do find the answer
asked by Anonymous 
math
answer for 11.67/6.14
asked by kim 
Science
I'm trying to figure out the ratio of floor to window space needed for passive solar heating...some sources say windows should be equivalent to 8% of the floorspace, others 80%? What do you think is the most realistic?
asked by Heather 
analogies
cold:mitten::hot: ?
asked by sally 
science
why does the moon have more craters than the earth?
asked by nicole 
history of design
discuss the whatham paper project
asked by belinda 
Maths
Solve the initial value problem t(dy/dt)+2y=9t with x(1)=4
asked by Lisa 
math
how to get from x to y pattern
asked by billy 
math
what is the percentage 81 of 91?
asked by Anonymous