Questions Asked on
April 6, 2010

chemistry
For each trial, enter the amount of heat gained by the chemical system of ammonium nitrate, qrxn. The specific heat of water is 4.184 J/goC. Report your answer using 4 digits. The information given is: Trial # Tiwater Tf Masswater #1: 21.2 10.8 24.990 #2:
asked by Megan 
calculus
What is the polar form of (3^1/2  i)? I know r=(x^2+y^2)^1/2 and theta = arctan (y/x) I know r=2, but how do you find theta?
asked by Jackie 
Physics
Two objects attract each other gravitationally with a force of 2.1×10−10 N when they are 0.21 M apart. Their total mass is 4.00 KG Find their individual masses. .
asked by mm 
Physics
A rock is dropped of the side of a bridge and hits the water below 4s later. a. What was the rock’s velocity when it hit the water? b. What was the rock’s average velocity as it fell? c. What is the height of the bridge above the water?
asked by Jackie 
phYsics
Two identical objects each hold a net charge of q = 8e. If the gravitational force between the two objects exactly cancels the electrostatic force between the objects, what is the mass of each object? Where G: 6.67E11 Ke=8.99E9 I know the equation is
asked by echem 
Electronics
I was wondering if you could help me with understanding how an infrared detector works. It is just a cheap one that comes with an emitter from Radioshack. I can't find any websites that tell me what I want to know. What makes the detector detect infrared?
asked by Fred 
Chemistry
How do you calculate the amount of a radioactive substance remaining after an integral number of halflifes have passed?
asked by Tristan 
Math
Write 67 hundredths as a percent. a) 670% b) 67% c) 0.067% d) 0.67% D???
asked by Keen 
Chemistry
A student is given a sample in lab which contains one of the ions listed below. After adding a few drops ofsolution to part of the unknown sample, the student got a greyish precipitate. After adding a few drops ofsolution to another part of the unknown
asked by Sam 
algebra
2x+2y+2=18+6y8
asked by Carolyn 
Math
Sue has $400 in her savings account. If the bank pays her 6 1/2% interest, how much interest will Sue earn? a) $260 b) $29.50 c) $26 d) 312 C???
asked by Keen 
Math
Use the given information to solve the triangle. If two solutions exists, find both. A=110 degrees a=125 b=100 a is greater than b so I think that there is only one triangle. I am not sure where to go from here.
asked by Abbey 
math
how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?
asked by Dawn 
Physics
A projectile is shot straight up from the earth's surface at a speed of 1.20×104 KM/HR. How high does it go?
asked by Michael 
College Algebra
state the range of each relation: A. y=absolute value of 2x3 B. y=the square root of x+1
asked by Dee 
math
find the equation (in standard form using only integers) for the line through (2, 5) that is parallel to 2x3y=5
asked by Garrett 
Algebra
Let f(x) =x^2 +2 and g(x)=2x + 1 Find and simplify each of the following bexpressions. a)...f(4) b)...g(a+2) c)...(fog)(2)
asked by Marsha 
Chemistry
What are all the possible lewis structures for SCN? Including the formal charges to all atoms.
asked by Max 
math
Can some one help me understand this question please? Give exact and approximate solutions to three decimal places. x^27x+11=0
asked by jen 
Physics
Mars rotates on its axis once every 24.8 hours. What is the altitude of a geosynchronous satellite orbiting Mars. I have the speed of geosynchronous orbiting Mars. But I cant find the altitude of a geosynchronous satellite orbiting Mars.
asked by Hoa 
math
Can some one help me complete the square in this question? x^2+(13/2)x=13
asked by jen 
math
The number of tickets sold each day for an upcoming performance of Hanel's messiah is given by N(x)=0.6x^2+12x+10, where x is the number of days since the concert was first announced. when will daily ticket sales peak and how many tickets will be sold
asked by jen 
math
Can someone explain how to label the vertex of this equation. f(x)= (1/2)x^2. i know how to do these question but when it actually has the other components to the quadratic equation.
asked by jen 
math
do i use the quadratic equation when solving this problem. 3x^25x7=0. If so the answer that i get is (5+square root of 59)/ 6 is this correct
asked by jen 
math
solve for x x^2+45=6x. is this like completing the square
asked by jen 
math
Solve the formula for the given letter. Assume all variables represent nonnegative numbers. a^2+k^2=j^2, solving for a
asked by jen 
math
how do i find the vertex for this type of problem 2(x+1)^2
asked by jen 
Chemistry
What are all the possible lewis structures for SCN? Including the formal charges to all atoms.
asked by Max 
PHYSICS
what does it mean to be outside the focal point of a converging mirror?
asked by LU 
philosophy
• Write a persuasive, formal letter (7501000 words) to a specific Continental philosopher featured in chapter 8. In the letter, describe the key ideas of that philosopher’s views, and then provide a critique of his or her views. Which of his or her
asked by john 
Science
Explain the feedback mechanisms that maintain homeostasis.
asked by Ashlee 
English literature
what are the didactic elements of morality play "Everyman"
asked by heranda 
multiplication
3 dights by 3 dights
asked by alicia 
calculus
A) How do you prove that if 0(
asked by Sarita 
grammar
My mother and shall or will go to concert tonight.
asked by Jaslin 
Physics
A wall is made of a substance whose thermal conductivity is .93 J / (m sec Celsius). What is the outside temperature of the wall if its thickness is 30 cm and its crosssectional area 73 m^2, and if thermal energy flows through the wall at a rate of 30
asked by Plaster 
Physics
Use Bernoulli's equation to determine the velocity with which water will exit from a hole in a uniform cylinder when the cylinder is filled to a point 3.1 meters above the hole, assuming that the water in the cylinder moves with negligible velocity.
asked by Plaster 
Physics
Mercury has a density about 13.6 times that of water. How high could you raise a column of mercury by increasing pressure to 8.2 kPa?
asked by Plaster 
Physics
There is a small amount of water at the bottom of a sealed container of volume 5.2 liters which is otherwise full of an ideal gas. A thin tube open to the atmosphere extends down into the water. The system is initially at atmospheric pressure and
asked by Plaster 
Ethics
HOW HAS THE AMERICAN HISTORY OF AFRICAN SLAVERY INFLUENCED OUR CONTEMPORARY SOCIETY? PROVIDE THREE EXAMPLES YOU BELIEVE TO BE MOST SIGNIFICANT.
asked by Anonymous 
math
Prove that the limit as n approaches infinity of ((n!)^2)/(2n)! is 0. I'm thinking that you have to use the squeeze theorem, but I'm not quite sure how. help please?
asked by Roy 
calculus
Prove that the limit as n approaches infinity of ((n!)^2)/(2n)! is 0. I'm thinking that you have to use the squeeze theorem, but I'm not quite sure how. help please?
asked by Roy 
differential equation
a four pound weight stretches a spring 8 inches from its natural lenght . the weight is pulled downward an additional 6 inches and released with an initial upward velocity of 8 feet per second . find a formula for the position of the weight as a function
asked by Anonymous 
Biology  Hormones
What 3 steroid hormones and involved in controlling reproductive function in both non pregnant women and in men
asked by jess 
com/150
Formatting Academic Papers Crossword Puzzle Exercise
asked by tony 
Global history
How did agricultural advancement impact society?
asked by Katherine 
accounting
Explain each step of the accounting cycle. Describe at least one transaction that would occur at the company you selected in each of these steps.
asked by Anonymous 
Science
Waste created by man can be classified under Heading X (eg torn book, mouldy bread, rotten apple) and Heading Y (plastic bag, biscuit tin, broken bulb). What is Heading X and Heading Y?
asked by Jenny 
Natural sciences
Does any steel float or zink in water
asked by Kgaume 
phyics
convert 36cm/min to km/h
asked by alisha 
Math
A satellite is launched into orbit 200 kilometers above the Earth.The orbital velocity of a satellite is given by the formula v=√GmE/r, where v is the velocity in meters per second, G is a given constant, mE is the mass of Earth, and r is the radius of
asked by Macy 
English
need some advice! My learners will work on a text next week.In the text are 7 new words. The aim of the lesson is to learn those words and practice them in a few ways. What can I do to practice those new words. Any interesting ideas from your own
asked by refy 
pyhsics
A 1kg projectile is fired at 10m/s from a 10kg launcher. The momenta of the projectile and the launcher have the same magnitude, but opposite directions. Show that the KE of the projectile is 10 times gerater that the KE of the recoiling launcher. KE =
asked by sherri 
Social Studies
What is a small island off the coast of Syria in the Mediterranean Sea?
asked by Leah 
ETH 125
How has the American history of African slavery influenced our contemporary society? Provide three examples you believe to be most significant.
asked by Sharon Page 
physics
A container holds 1.1 g of oxygen at a pressure of 7.40 atm . How much heat is required to increase the temperature by 110 degree C at constant pressure? How much will the temperature increase if this amount of heat energy is transferred to the gas at
asked by Kidda 
COM/150
Need help with some supporting details, and subdetails for my appendix d. My thesis is "Instead of being the solution to larger issues like low selfesteem and depression, cosmetic surgery has become the issue." Can you help with some examples you would
asked by Nikol 
physcis
Seals may cool themselves by using thermal windows, patches on their bodies with much higher than average surface temperature. Suppose a seal has a 0.030 m^2 thermal window at a temperature of 30 degree C. If the seal’s surroundings are a frosty 10
asked by Kidda 
health
Have patients who cannot assist in suicide a right to voluntary active Euthanasia? This is a question I am not sure how to answer except no. I say this because of Jack Koverkion helping person with suicide with deadly disease went ot prision. can anone
asked by april 
College Algebra
state the range of each relation: A. y=absolute value of 2x3 B. y=the square root of x+1
asked by Dee 
Bus Law 201
Gavin, an 18 year old sudent was eating lunch on the grounds of a school. He threw a half eaten apple toward the outside wall of a classroom some distance way. The apple sailed through a slowly closing door and struck a teacher who was in the room. The
asked by Jackie 
algebra
Let f(x) =x^2 +2 and g(x)=2x + 1 Find and simplify each of the following bexpressions. a)...f(4) b)...g(a+2) c)...(fog)(2)
asked by Marsha 
math
Please help solving this problem. Solve the following word problem: One poll reported that 48% of city residents were against building a new stadium. The polling service stated that the poll was accurate to within 3%. What is the minimum percent of city
asked by bindiya farswani 
geometry
okay, if I have a square, and know the square footagehow can I find the middle of that square? I can't figure this out for the life of me.
asked by Rick 
Physics
Marshall applies a constant force of 20N to a box and causes it to move at a constant speed of 4m/s. Show that the work he does in moving the box in 6s is 480J. KE/2v^2=m?
asked by sherri 
Economics
o Which government bodies influence national fiscal policies that potentially affect the housing market? I am thinking the federal reserve but I am really unsure about that answer.
asked by Bridget 
science
Are humans both creaures and creators of their personal and social worlds?
asked by john 
physics
if two vehicles moving at a same speed and direction and a bullet is fired perpendicularly from one vehicle to a particular point on the another vehicle, would the bullet hit accurately?
asked by sovon 
Geometry
If hexagon A is similar to hexagon B and hexagon B is similar to hexagon C, then what conclusion can be drawn? What property does this illustrate?
asked by Cameron 
choir
I have been given a piece of music for an audition piece to learn over spring break, it is called Danny boy and i can not exactly get one part correct. How do i get this part?
asked by Sami 
math
there are 500 seats in the auditorium. A concert was playing there and 1/5 of the seats were not filled. All the other seats that were filled cost $5.00 a piece to sit in. HOw much money was made in concert tickets ?
asked by Alexander 
math
there are 40 marbles in a jar. Chris had 2/5 of the marbles, Sal had 1/8, Tim had 1/10, and Bob, John and Don split whatever was left over evenly. How many marbles did Bob, John and Don split ?
asked by Alexander 
physics
A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If 9 kJ of heat is applied to the system and it does 5 kJ of work, how much does the internal energy change?
asked by nish 
math 221
1. Using Excel, find the zscore that corresponds to the following Confidence Levels: a. 80% b. 85% c. 92% d. 97% 2. Using Excel, find the tscore that corresponds to the following Confidence Levels and Sample Sizes: a. 95% with n = 25 b. 96% with n = 15
asked by megan 
CHEMISTRY
TALKING ABOUT EXTRACTING DNA eXPERIMENT: MASH FRUIT UP WITH COLD ISOPROPYL ALCOHOL, SALT, WATER, AND DETERGENT THEN EXTRACT DNA USING A WOODEN SPLINT. WHEN EXTRACTING DNA FROM STRAWBERRIES WHY CAN WE NOT SEE IT IN MASHED UP STRAWBERRIES BUT YOU CAN SEE IT
asked by DEBBIE 
Physics
The masses of 1 mole of various gases are as follows: hydrogen about 2 grams, helium about 4 grams, nitrogen about 28 grams, oxygen about 32 grams and carbon dioxide about 44 grams. On the average how fast does a molecule of each gas move at 333 Celsius?
asked by Benny 
math
how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?
asked by Dawn 
Physics
Explain why the pressure at depth h in a stationary fluid is `rho g h.
asked by Benny 
Physics
Air passes over the top of an airplane wing at 235 m/s and over the bottom at 190 m/s. If the wing has area 10 m^2, how much lift results?
asked by Benny 
CHEISTRY
MAKING SLIME!! 1.WHEN SLIME IS ROLLED INTO LONG 4 IN PIECES AND JERKED FROM TWO ENDS DOES THE SLIME ACT LIKE A SOLID OR LIQUID? i THINK A SOLID BUT WHY? 2. IF YOU PULL SLIME AT TWO ENDS AFTER ROLLED I THINK THE SLIME ACTS LIKE A SOLID BUT I DON'T KNOW WHY?
asked by DEBBIE 
pure math 30
the graph y=x^34x^2+x+6 is stretched horizontally by a factor of 2 about the line x=4. what is the resulting equation
asked by natasha 
CHEMISTRY
POLYMER COMPOSITE EXPERIMENT USED GLUE AND THREAD PUT STRIPS OF GLUE THEN ADDED STRANDS OF THREAD ALLOWED TO DRY DID 3 DIFFERENT STRIPS AND LAYED THREAD PARALLEL AND PERPENDICULAR ON ONE 1. I DON'T KNOW WHY THE STRIS THE LONG WAY SEEM STRONGER OR SHOULD
asked by DEBBIE 
american literature
name the virtue Benjamin Franklin says gave him the most trouble or where can i find it at
asked by Anonymous 
math
it takes a 40 lb turkey two hours to cook. Tom baked his own turkey that was 1/5 the size of a 40 lb turkey. How long will it take for Toms turkey to bake ?
asked by Alexander 
math
thomas wants to build a seven layer brick wall. the bottom layer has 20 bricks and each layer of the wall that goes up has two less bricks than the layer below it. if each brick costs .50 cents to cement how money will Thomas spend on the wall ?
asked by Alexander 
math
Stan bought several clothing items at macys. He bought a jacket for $30.00, a hat for $10.00, and two shirts for $5.00 each. He had a coupon that took 30% off the total bill. He paid with a $50.00 bill and received three of the same types of bills in
asked by Alexander 
physical chemisry
Estimate the freezing point of 150 cm3 of water sweetened with 7.5g of sucrose (C12H11O22). (Kf for water is 1.86 K kg mol1; density of water is 1gcm3)
asked by Anonymous 
algebra
Solve each inequality. State the solution set using interval notation and graph the solution set. 1x
asked by Marsha 
Physics Help Please!
If the price of electrical enegy is $0.10 per kilowatt *hour, find the cost of using electrical energy to heat the water in a 12.0m * 9.00m * 1.5m swimming pool from 15 degrees C to 27 degrees C. So the change in temperature is 285.15 , the volume is
asked by Dave 
algebra
Money is invested at two rates of interest. One rate is 8% and the other is 2%. If there is $1000 more invested at 8% than at 2%. Find the amount invested at each rate if the annual interest from both investments is $310. Let x amount invested at 8% and y
asked by jerson 
math
sean had the following test grades: 50%, 65%, 50%, 45%, 100%. what is the range ?
asked by Alexander 
math
i am a quadilateral. I have four sides, four angles and only one set of parallel lines. i am not a parallelogram. what am I ?
asked by darlene 
Chemistry
In the reaction: NaOH + HCl > NaCl + H2O how many moles of water are produced when 1 mole of HCl is neutralized by 1 mole of NaOH?
asked by Anonymous 
math
i am a two digit number that falls in between 40 and 50. I can be evenly be divided by the number 5. what number and I ?
asked by darlene 
chemistry
How many moles of acid were present in 50 ml or 1.0M HCl? How many moles of water were produced in this reaction?
asked by Kate 
math
for numbers less than 40, list each pair of numbers that has a greatest common factor of 12???
asked by Anonymous 
algebra
Write an equation of the line, in the form of y = mx + b that passes through the given points. 3. (0,5),(2,0) 5. (1,4),(3,8)
asked by Anonymous 
statistics
1. The new Twinkle bulb has a standard deviation σ = 34 hours. A random sample of 77 light bulbs is selected from inventory. The sample mean was found to be x= 492 hours. Question: Find the margin of error E for a 90% confidence interval. Round your
asked by looking for someone to varify my work please 
math
how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?
asked by Anonymous 
physics
Suppose a fixed cannon is to fire a projectile at an enemy tank, which is moving toward the cannon at a speed of 15 mph. If the cannon is to fire at the moment the tank is 3 miles from the cannon and the muzzle speed of the cannon is 1100 mph, what is the
asked by Drew 
chemistry
how many moles of water are produced from the combustion of 3.5 mol of hydrogen and 5.2 mol of oxygen
asked by juanita 
Chem
3O2(g)> 2O3(g) At a given instant, the reaction rate in terms of [O2] is 2.17x10^5 mol/L*s. What is it in terms of O3?
asked by Mike 
MATH
IS 8 FL OZ ONE CUP
asked by BOB 
Chem
NaOH + HCl > NaCl + H2O What is the amount of heat absorbed by water? given: mass: 102.2 grams specific heat: .9601 cal/g degrees C
asked by Janae 
history
are all countries leaders nationalist? why or why not?
asked by Anonymous 
math
thanks.
asked by Anonymous 
statistics
Question: A standard placement test has a mean of 105 and a standard deviation of ó = 13. Determine the minimum sample size if we want to be 99% certain that we are within 3 points of the true mean. Answer: N = ( zc ó/E)^2 = (2.575 x 13/3)^2 = 121
asked by looking for someone to varify my work please 
statistics
An experimental egg farm is raising chickens to produce low cholesterol eggs. A lab tested 12 randomly selected eggs and found that the mean amount of cholesterol was x = 186 mg. The sample standard deviation was found to be s = 19.0 mg on this group.
asked by looking for someone to varify my work please 
statistics
The new Twinkle bulb is being developed to last more than 1000 hours. A random sample of 100 of these new bulbs is selected from the production line. It was found that 48 lasted more than 1000 hours. Find the point estimate for the population proportion,
asked by looking for someone to varify my work please 
Math
Could someone please help me with this problem? I need to solve 5/2x greater than or equal to 7/4. Here is the answer that I got but I 'm sure that it is not correct. x greater than or equal to 35/8. Thanks.
asked by B.B. 
Chemistry
Which one of the following combinations of reagents will result in a spontaneous reaction? A) Al(s) + CuCl2(aq) B) Al(s) + CaCl2(aq) C) Zn(s) + CaCl2(aq) D) Cu(s) + ZnCl2(aq) I know the answer is A, but what I don't know is why, or how to figure this out.
asked by Trixie 
chemistry
Strontium90 has halflife of 28 years. if a 1.00mg sample was stored for 112 years. what mass of Sr90 would remain?
asked by bob 
College Algebra
IS (x2) a factor of f(x)= 9x^4+16x^3+8x^29x+2
asked by Grecia Chapa 
vector geometry
Suppose a fixed cannon is to fire a projectile at an enemy tank, which is moving toward the cannon at a speed of 15 mph. If the cannon is to fire at the moment the tank is 3 miles from the cannon and the muzzle speed of the cannon is 1100 mph, what is the
asked by Drew 
vocabulary
The word "accountable" is best described as...... a. sensible b. hospitable c. laughable d. favorable e.sociable f. responsible Technically I am asking for a definition , but if you can give me the answer...ok! Please help!
asked by sierra (6th grade) 
9th grade acc. algebra
how do you do this? this is the full question and all info: "A line with a slope of 3 passes through the point (k,4). Find the yintercept of the line in terms of k." I would like to know how to do this along with the answer so i can know im doing it
asked by alyssa 
social studies
What social classes existed in Aryan culture?
asked by Annie 
chemistry
how do you how do you find the mass of a solution, given the density is 1.022 g/mL.
asked by Joe 
College Chemistry
Quick Question  For a spontaneous reaction, ΔS°>0 and K >1. Is this always?
asked by Whitney 
chemistry
Tetraphosphorus trisulphide (P4S3) is used in the match heads of some matches. It is produced in the reaction 8P4+3S8 > 8P4S3. Determine which of the following statements are incorrect, and rewrite the incorrect statements to make them correct. a. 4 mol
asked by Ana 
Algebra 3
how do i use an identity to find the value of the expression sin 1.7 and csc 1.7
asked by Melysa 
physics
A butterfly at eye level is 22 cm in front of an plane mirror. You are behind the butterfly, 46 cm from the mirror. What is the distance between your eye and the image of the butterfly in the mirror?
asked by mika 
Chemistry
When 0.320 moles of NH4Cl is dissolved in 1.00 L of water, the temperature drops by 13.7 degrees C. What is the heat of solution of ammonium chloride? The solution has a density of 1.0012 g/mL and a specific heat of 0.9818 cal/g degrees C.
asked by adam 
Geometry
BD is a perpendicular bisector of triangle ABC. XZ is a perpendicular bisector of triangle WXY. Triangle ABC is similar to triangle WXY with a scale factor of 1:3. Part I. Find BD, AB, WZ, XZ and WX. Part II. What is the scale factor of the perimeters of
asked by Jenna 
Physics
Assuming that your lungs can function when under a pressure of 11 kPa, what is the deepest you could be under water and still breathe through a tube to the surface?
asked by Noodle 
Physics
Water is descending in a vertical pipe of diameter 7 cm and open to the atmosphere. At a lower point the water flows into a smaller pipe of diameter .84 cm. At a certain instant the depth of the water just above the narrowing point is 30 cm and the water
asked by Noodle 
Physics
There is a small amount of water at the bottom of a sealed containerof volume 4.3 liters which is otherwise full of an ideal gas. A thin tube open to the atmosphere extends down into the water, and up to a height of 238 cm. The system is initially a
asked by Noodle 
Physics
What is the difference in blood pressure between the head and feet of a person of height 171 cm?
asked by Noodle 
Physics
Well it's an kinematics project and it involves alot of questions. So here goes the problem: Suppose a football was thrown at an angle of 37 degrees with a velocity of 90mi/hr while leaving a quarterback hand at a height of 6'4" above the ground.
asked by Vanessa 
English
I am writing a research paper on Billy Collins' poetry. What are his main themes? I need three... So far I have middleclass American life...
asked by Sarah 
ALGEBRA
1. Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office
asked by GGIFT 
economics
evaluate to what extent the costumers are likely to be affected by the oligopolistic bahvior of toy retailers in the uk
asked by neda 
chemistry
why are the equivalence point and the end point different in a titration?
asked by shelley 
statistics
Of the 300 employees that were surveyed, 200 had college degrees, 50 were single, and 30 were both single and had college degrees. What is the probability that an employee chosen at random is single or has a college degree?
asked by sam 
Science (Atmosphere)
What happens to the energy absorbed by Earth's surface and atmosphere? They get radiated back into space as longer wave radiation. Is there anything else I should add to this answer? Thanks.
asked by John 
ALGEBRA
Find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function. f(x) = 2x^2 + 2x + 9 x coordinate is y coordinate is the equation of the line of symmetry is x = Maximum/minimum of f(x) is the value, f (1half) = 19 over 2
asked by GGIFT 
chemistry
25.00 mL of an acetic acid solution requires 23.86mL of a 0.1550M potassium hydroxide solution to reach the end point. What is the molarity of the acetic acid solution? (Hint: write the chemical reaction, and remember stoichiometry)
asked by shelley 
Physics
use two 100ohm resistors, two 20ohm resistors and two 47ohm resistors in any combination to get any of these currents...... a) I=0.015 A b) I=0.031 A c) I=0.064 A d) I=0.6 A
asked by Amy 
Bio
What the technical name for a children ward in the hospital? something like _____netal. im not too sure.
asked by Lena 
hca210
long term care
asked by Anonymous 
ALGEBRA
give exact and approximate solutions to three decimal places x^2  7x + 7 = 0
asked by GGIFT 
statistics
A manufacturer of luxury SUVs is concerned because warranty claims and customer dissatisfaction seems to be on the rise. The manufacturer knows that, based on experience with last year’s model, there is a probability of 4% that a customer will bring back
asked by sam 
ALGEBRA
determine the nature of the solutions of the equation x^2  20 = 0
asked by GGIFT 
Microeconomics
For a downwardsloping demand curve, marginal revenue decreases as quantity sold increases. True or False?
asked by L 
Algebra
Between what two consecutive integers is each square root of 139?
asked by Chloe dawgg :) 
ALGEBRA
solve 3x + x(x1)=0 and find the y intercepts of f(x)=3x + x (x1)
asked by GGIFT 
ALGEBRA
give exact and approximate solutions to three decimal places. x^2 + 10x + 25 = 1
asked by GGIFT 
ALGEBRA
solve 3x^2 = 15
asked by GGIFT 
math
there are 30 students in class. 1/5 of the class are girls. how many boys are in the class
asked by amber 
accounting
I have the postclosing trial balance of the company from the previous month. I also have the AR closing & the AP closing numbers. Do these numbers get transfered into the new month general journal and ledger accounts as balances forward?
asked by April 
6th grade
Kara has a diamond ring. Her ring has a volume of 6cm(to the third power) and a mass of 2g. What is the density of her ring? INCLUDE UNITS!
asked by kEVIN 
math
if the length of two sides of an isosceles triangle are 7 and 15, what is the perimeter of the triangle?
asked by patel 
math
Can someone please explain this problem to me: I have to use integrals to find volumes with known cross sections but i just don't understand. Thanks! Consider a solid bounded by y=2ln(x) and y=0.9((x1)^3). If cross sections taken perpendicular to the
asked by summer 
math 116 algerbra
4+(1)=
asked by renee 
math
what is 5% OF 20
asked by endbj 
calculus optimization
a company manufactures large cylindrical drums.the bottom and sides are made from a metal that costs $4.00 a square foot, while the reinforced lid costs $6.00 a square foot. ind thedmensions ofa drm that hasa volume of 10cubic feet and minizes the total
asked by MILEY 
ScienceUrgent
I did an experiment on a burning candle, and I need help with some of the questions. Thank you very much in return. Please no websites.more information would be appreciated, thanks:) I'll list everything of what we went through. Materials: 1 standard
asked by Sara 
math
Where does the graph y=4x 11 cross the yaxis?
asked by nikki 
accounting
Prepare adjusting journal entries for the year ended (or date of) December 31, 2005, for each of these separate situations. Assume that prepaid expenses are initially recorded in asset accounts. Also assume that fees collected in advance of work are
asked by kim 
biomechanics
If a kicker produces a torque of 8Nm with her muscles and the resulting angular acceleration of her leg is 20rad/m2, what is the moment of inertia of her leg?
asked by Jane 
Chemistry
I have to write a bunch of atomic symbol for these isotopes and I don't understand how to I do it. (a) atomic number=53, number of neutrons=79 I looked at the periodic table for 53 so the element is Iodine. So They gave the atomic number and I have the
asked by SC 
statistics
A statistics professor receives an average of five email messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have five messages?
asked by Suphaluck 
math
Money is invested at two rates of interest. One rate is 8% and the other is 2%. If there is $1000 more invested at 8% than at 2%. Find the amount invested at each rate if the annual interest from both investments is $310. Let x amount invested at 8% and y
asked by jerson 
Math
A company is increasing production at the rate of 25 units per day. The daily demand function is determined by the fact that the price (in dollars) is a linear function of q. At a price of $70, the demand is 0, and 100 items will be demanded at a price of
asked by Alex 
physics
I want to confirm if its true if one object is to exert a force on another, then the two objects must be touching or connected by a third object.
asked by Anonymous 
algerbra 116
9(8)=
asked by renee 
Calculus
How do you find the derivative of: y= 2sinx cosx
asked by Wayne 
Science
True or False? Density is another property of matter True???
asked by Keen 
chemistry
What are several reasons why the actual yield from a chemical reaction is not usually equal to the theoretical yield?
asked by John 
Physics
A projectile is shot straight up from the earth's surface at a speed of 1.20×104 km/hr. How high does it go?
asked by Zack 
algerbra 116
I am thinking that 9(8)= 1 ,is this the correct answer?
asked by renee 
XECO 212
Locate recent articles in the New York Times or Wall Street Journal in which economists are quoted usingpositive and normative statements. Provide one quote and its context for both a positive and normative statement. Explain your choice.Evaluate the
asked by James T. Benton Sr. 
college
Needs help with writing a thesis statement about depression within teen suicide.
asked by April 
Math
Use the given information to solve the triangle. If two solutions exists, find both. A=110 degrees a=125 b=100 a is greater than b so I think that there is only one triangle. I am not sure where to go from here.
asked by Abbey 
Chemistry
Have I balanced this equation correctly CN + NaOCLOCN + NaCl
asked by Mel 
Math (fractions)
2 8/9 + 1 1/2
asked by Hi 
algerbra 116
3 0 = 0,is this correct,Thank you for yhe help
asked by renee 
Math
The lesson that I am working on is called mathematical induction. The only problem is that the lesson was not explained very clearly due to a problem with the recording so I have no idea how to complete this problem. Find p k+1(This is little under the p)
asked by Abbey 
French
Is the second verb in a french sentence always in the infinitive (if this is present tense)? For example: Les talons rétractent quand tu promene l'escalier.
asked by Aly 
language arts/research paper topic
i myself need a third idea to do a research project on as a 7th grade advanced english student so far i have abusive teenage relationships , and anastasia romanov
asked by ali 
Chemistry
A 22.44g sample of iron absorbs 180.8J of heat, upon which the tempature of the sample increases from 21.1 C to 39.0 C. What is the specific heat of iron?
asked by Camarra 
Chemistry
The value of H° for the reaction below is 482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO (g) reacts completely.
asked by Camarra 
Chemistry
For which one of the following reactions is the value of H°rxn equal to H°f for the product?
asked by Camarra 
College Chemistry
How many orbitals have the following quantum numbers: n=6, l=2, ml=2?? a. 0, b. 5, c. 7, d. 10, e.6 Since only one can include n=6 in its equation would it make it just one orbital having those numbers? im also thinking that there might be other orbitals
asked by James 
chemistry
I was trying to do a balanced reaction equation to show cyanide being oxidized by hypochlorite ion to cynate. I wasn't sure if there needed to be oxygen in the equation too. CN + NaOCl = OCN + NaCl
asked by Mel 
Chemistry,
I reall need help, i know what formulas to use i just don't know how to do it. Can some one please work with me to get to the correct answer? 1.The air in a dry, sealed 2L soda bottle has a pressure of 0.998 atm at sea level at a temperature of 34C. what
asked by Courtney 
Chem
2. Carbon monooxide CO is product of incomplete combustion of fuel. Find the volume that 42g of CO gas occupies at STP
asked by Courtney 
chem
3. Determine the density of chlorine gas at 22C and 1.00 atm pressure.
asked by Courtney 
Chemm
A 2.00L flask is filled with propane gas(C3H8)at 1.00atm and 15C. What is the mass of propane in the flask?
asked by Courtney 
Science Helpers
My science post is almost at the bottom and I need it to be checked urgently. I see science helpers on this site as of right now.Can you please have a moment to look at my Science post. Thank you very much in advance:)
asked by Sara 
Physics
It has been suggested that rotating cylinders about 10 mi long and 5.6 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the freefall
asked by Alexander 
math
what do you get when you cross a stick of dynamite with a lemon pie?
asked by sam 
4 Grade
About how many people lying headtotoe are needed to strech around the earth? Is it closest to : a) 1 million; b) 25 million; c) 100 million? (Hint: The distance around the earth is approximately 25,000 miles).
asked by Nina 
Math
You can roll two dice at a time, a white one and a red one, and there are 36 different ways for the "up faces" to land. How many of ways will give a sum of 7 on the two up faces?
asked by Mia 
science
whats the celstial sphere?
asked by Arora 
Physical science
If the reading on a electric meter was 2345 kilowatthour and the next mouth was 3456 , how much electrical energy was used ?
asked by Gwen 
education
Children will generally select equipment based on: a.their prior success with the equipment. B.the size of the equipment c.the brightness and boldness of the equipment's colors d. The opportunity for challenge presented by the equipment. My answer is D.
asked by vanessa 
chemistry
Five kg of ice cubes are moved from the freezing compartment of a refrigerator into a home freezer. The refrigerator's compartment is kept at 4.0 celsius. the home freezer is kept at 17 celsius. How much heat does the freezer's cooling systeam remove
asked by evelyn 
Drbob222
Are you done helping me? Sorry, to bugg you i just reall need the help.
asked by Courtney 
chemistry(just to double check)
The initial pressure for the compounds involved in the reaction displayed were determined to be P(SO2(g)) = 0.5932 atm, P(O2(g)) = 0.4886 atm, P(SO3(g)) = 0.09287 atm. Calculate the value of the equilibrium constant (Kp) at 1000 K if the equilibrium
asked by bme1 
math
Can someone please explain this problem to me: I have to use integrals to find volumes with known cross sections but i just don't understand. Thanks! Consider a solid bounded by y=2ln(x) and y=0.9((x1)^3). If cross sections taken perpendicular to the
asked by summer 
Macroeconomics
Suppose the money supply is currently 500 billion and the Fed wishes to increase it by 100 billion. Given a required reserve ratio of .25, what should it do?
asked by Debbie 
math
A passenger in an airplane flying at an alti tude of 14 kilometers sees two towns directly to the left of the plane. The angles of depres sion to the towns are 30◦ and 52◦. How far apart are the towns? Answer in units of ft.
asked by Carter 
geometry
A CIRCLE HAS AN AREA OF 50 SGUARE FEET.WHAT IS THE APPROXIMATE DIAMETER OF THE CIRCLE?ROUND TO THE NEAREST WHOLE FOOT.
asked by KYLE 
chemistry(check my work)
The initial concentration for the compounds involved in the reaction shown were determined to be [CS2(g)] = 1.075 mol/L, [H2(g)] = 1.436 mol/L, [CH4(g)] = 0.6740 mol/L, [H2S(g)] = 0.3120 mol/L. Calculate the value of the equilibrium constant (Kc) at 1175 K
asked by bme1 
chemistry(check my work)
The freezing point of a solution is A. lower than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstructon by solute particles.. B. higher than the freezing point of
asked by eng 
Chemistry
If 0.0308 M aqueous FeCl3 is produced stoichiometrically according to the balanced equation in a reaction solution with a total volume of 1200 mL, what mass (g) of gaseous H2S is produced? Fe2S3(s) + 6HCl(aq) ¨ 3 H2S(g) + 2 FeCl3(aq)
asked by Adam 
chemistry(check my work)
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. independent of the chemical identity of the solute. C. dependent on the molar mass of the solute. D. responsible for
asked by eng 
DrBob222
I reponded back to you on my science helpers post.
asked by Sara 
College English
I need help with undersatnding fallies. Example of a sentence to list fallicies: You're either a critical thinker or you're not.
asked by Sandy 
English
In many works of literature, an individual's encounter with death or destruction ultimately leads to the individual's affirmation of the dignity and worth of human life. What does this quote means and how does this quote relates to Hamlet by William
asked by Joel 
algebra
5x^3
asked by april 
algerbra 116
After diving 88m below sea level,a driver rises at a rate of 6 meters per minute for 7 min.Where is the diver in relation to the surface?
asked by renee 
Social Studies
What happened to Andrew Jackson when he was eight years old?
asked by Jack 
math
One thousand three hundred and twenty feet are what part of a mile? Answer has to be in lowest terms.
asked by Anonymous 
Chem
Calculate the [NH4+] in solution that is 0.25 M NH3 and 0.20 M NaOH. (Kb for NH3 = 1.8 x 105) I set up ICE from the equation: NH3 + H20 NH4 + OH I 0.25 0 0 C x +x +x E 0.25x x x 1.8 *10^5 = x*x/ 0.25x 4.5* 10^6 = x2 took the square root to
asked by AMI 
math
Use linear combinations to solve the system 3x − y = −4 −6x + y = 34 The value of x is The value of y is
asked by Carter 
grd1 math
2+10= i havent learn how to do a dble digit, how do u do this?
asked by just wondering 
English
1. He has lunch at 12:00. 2. He has lunch at 12:00 p.m. 3. He has lunch at 12. 4. He has lunch at 12 p.m. 5. He has lunch at noon. (Are all grammatical?) 6. He goes back home at 15:30 p.m. 7. He goes back home at 15:30. 8. He goes back home at 3:30 p.m. 9.
asked by rfvv 
ethics
Cuddly bear...arent you afraid your professor might be monitoring this site?
asked by big bear 
Chemistry(defintions)
I need help on finding the definitions to these: Pressure being constant, the amount of heat in a chemical equation ___________. Randomness of particle measurement is called __________. Calories required to convert 1gm of liquid to vapor without a change
asked by Bill 
Chemistry
Identify the species oxidized and the species reduced in each of these redox equations A. 3Br2 + 2Ga > 2GaBr3 B. HCL + Zn > ZnCl2 + H2 C. Mg + N2 > Mg3N2
asked by Anonymous 
Server 2003
on a network operating at a Windows 2000 mixed domain function level , which of the following are limitations on converting groups
asked by John 
English
1. There are a lot of clubs in my school. 2. There are a lot of clubs in our school. (Are both correct? Can we use 'our' instead of 'in'?) 3. I study a lot of subjects like mechanics, ethics, and social studies. 4. I study a lot of subjects such as
asked by rfvv 
English
I'm suppose to identify and label the Subject Compliments, Object Compliments, Direct Objects, and Indirect Objects in each of these sentences. I've got most of them already but I'm having trouble with just a couple. Please Help, 1. Accomplishments have no
asked by Alex 
English
I'm suppose to identify and label the Subject Compliments, Object Compliments, Direct Objects, and Indirect Objects in each of these sentences. I've got most of them already but I'm having trouble with just a couple. Please Help, 1. Accomplishments have no
asked by Alex 
Sciencebobpursley
Thanks for helping me with al those parts bobpursley. If you have time, can you also check my questions please. Thank you very, very much in return. My post is on the second page.
asked by Sara 
Chem
Calcaulate the pH after 10.0 mL of 0.40 M HCl is added to 20.0 mL of 0.50 M NaOH. I wasn't sure on how to start this problem. I tried to break the HCl and NaOH apart then I set up ICE for each but I did get the wrong answer of 13.70. a. 0.40 b. 13.70 c.
asked by AMI 
algerbra 116
what is a equivalent expression of mn is?
asked by renee 
Statistics
Six mice are in an experiment on nutrition and 2 are chosen at random for the control group. What is the probability that the two heaviest mice are chosen for the control group? PLEASE HELP!! This is a review question for an exam I have in the morning!!
asked by Kassie 
business math
The cost of running a business is a combination of items called
asked by sue 
us history
The "real heart" of the progressive movement was the effort by reformers to
asked by Anonymous 
science
what is the salary, range, and amount of schooling needed to be an EMT?
asked by jerson 
Physics
A particle of mass m moving at 5 m/s in the positive x direction makes a glancing elastic collision with a particle of mass 2m that is at rest before the collision. After the collision, m moves off at an angle of 45 degrees to the x axis and 2m moves off
asked by Lauren 
English
I'm suppose to identify and label the Subject Compliments, Object Compliments, Direct Objects, and Indirect Objects in each of these sentences. I've got most of them already but I'm having trouble with just a couple. Please Help, 1. Accomplishments have no
asked by Alex 
Statistics
Suppose X is a normally distributed random variable with the mean u(Mu) and variance sigma^2. Suppose P(X
asked by Kassie 
Statistics
Five cards are drawn at random without replacement from and ordinary deck of 52. What is the probability all 5 cards are from the same suit?
asked by Kassie 
Statistics
Show that if A and B are independent events P(A or B)1 [1P(A)][1P(B)].
asked by Kassie 
algerbra 116
12(p plus 3)=
asked by renee 
physics
Suppose a fixed cannon is to fire a projectile at an enemy tank, which is moving toward the cannon at a speed of 15 mph. If the cannon is to fire at the moment the tank is 3 miles from the cannon and the muzzle speed of the cannon is 1100 mph, what is the
asked by drew 
algerbra 116
14(x6=
asked by renee 
Precalculus
PLEASE HELP!! Solve: 1. cos(arcsin(4/5))= ?? 2. tan(arccos(4/5))= ?? 3. cos(arctan(3))= ?? Note: Give exact answers!!
asked by jh 
algebra
how many different pizzas can be made if a pizza shop has 6 meat toppings, 5 vegetable toppings, and 3 cheese toppings to choose from using 1 of each on each pizza?
asked by julie 
algebra
solve for x 7+3(1x)=52(34x)
asked by leeee 
algebra
(3+4i)+(5+7i)
asked by mada 
phoenix
how does the author build his story
asked by jean 
algebra maginary numbers
(3+4i)(34i)
asked by mada 
Calculus
A company is increasing production at the rate of 25 units per day. The daily demand function is determined by the fact that the price (in dollars) is a linear function of q. At a price of $70, the demand is 0, and 100 items will be demanded at a price of
asked by John 
algebra
2+i/3i
asked by mada 
algerbra
16 less than q, what is the translation?
asked by renee 
Chem
What molarity of a NH4NO3 solution has a pH of 5.220? Kb for NH3 is 1.8 x 10^5. Choose one answer. a. 6.31x 106. b. 2.21 x 106 c. 5.56x 1010. d. 0.065 I started by taking the inverse log of the PH to get (6.02*10^6) then I was thinking its not the way
asked by AMI 
physics
The masses of 1 mole of various gases are as follows: hydrogen about 2 grams, helium about 4 grams, nitrogen about 28 grams, oxygen about 32 grams and carbon dioxide about 44 grams. On the average how fast does a molecule of each gas move at 333 Celsius?
asked by Plaster 
physics
a 600N person picks up a 180 N suitcase positioned so that the suitcase's center of gravity is 20cm lateral to the location of the person's center of gravity before picking up the suitcase. if the person does not lean to compensate for the added load in
asked by justine 
physics
There is a small amount of water at the bottom of a sealed containerof volume 4.3 liters which is otherwise full of an ideal gas. A thin tube open to the atmosphere extends down into the water, and up to a height of 238 cm. The system is initially a
asked by Noodle 
physics(check my answer)
can you tell me what i did wrong on this problem Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s. 4kg,y=3.00m 2kg,y=2.00m 3kg,y=4.00m a)Find the total
asked by phys 
precalculus
What is the polar form of the equation 3x  4y = 12? The answer is r = 12/ (3cosx  4 sinx) (x = theta) I don't know how to get the answer though.
asked by Jamie 
physics
Water is descending in a vertical pipe of diameter 7 cm and open to the atmosphere. At a lower point the water flows into a smaller pipe of diameter .84 cm. At a certain instant the depth of the water just above the narrowing point is 30 cm and the water
asked by Benny 
physics
A toy rocket is fired off a platform with an initial speed of 223 ft/sec at an angle of elevation of 32 degrees and achieves a maximum height of 291 ft. How how above the ground was the platform?
asked by drew 
math
calculate the measures of the point angles of the starshaped polygons shown. I know you can see the firgure but its 140 degree angle. To measure them do I do 360/140=2.57?
asked by Alvin 
algebra
x^2+225 ..factor over complex numbers?
asked by mada