Questions Asked on
April 17, 2011

chemisrty
Which of the following is an acid base reaction? C(s) + O2(g) → CO2(g) MgSO4(aq) + Ba(NO3)2(aq) → Mg(NO3)2(aq) + BaSO4(s) 2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq) Fe(s) + 2 AgNO3(aq) → 2 Ag(s) + Fe(NO3)2(aq) None of the above are acid
asked by yr 
physics
Why do many musicians wear earplugs during their performances even though the intensity of the sounds produced is lower than the threshold of pain?
asked by ashley  
physics
A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of the mirror such that its image is formed 10 cm in front of the mirror. If you measure distance from the optic center of the mirror, (A) What is the focal
asked by ashley  
READING
WHAT REFERENCE SOURCE WOULD YOU USE TO FIND THE AVERAGE SNOWFALL IN JANUARY IN NOME,ALASKA???? P.S.IS THIS FREE???
asked by CALLI 
animal farm
what is an example of alliteration in animal farm? please give the chapter numberthank you!!!
asked by izzy 
statistics
John drives to work each morning and the trip takes an average of = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of = 5 minutes. For a randomly selected morning, what is the probability that John's
asked by karla 
physics
Dispersion in a window pane. In the figure on the left, a beam of white light is incident at angle θ = 51° on a common window pane (shown in cross section). For the pane's type of glass, the index of refraction for visible light ranges from 1.528 at the
asked by Jenna 
physics
What are the first, second, and third frequencies audible from a 20 cm long organ pipe when (A) only one end is open and when (B) both ends are open. The speed of sound through the air inside the organ pipe is 343m/s
asked by ashley  
physics
A cake of soap placed in a bathtub of water sinks. The buoyant force on the soap is: a Zero b Less than its weight c Equal to its weight d More than its weight I believe is D for if the cake of soap sinks, it means that the specific gravity is more
asked by DMITRIC 
physics
The sixth harmonic of a 70 cm long guitar string has a frequency of 557.14 Hz. What is the velocity of sound in the guitar string?
asked by ashley  
Physics
Please Help!!! A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic
asked by Brittney 
physics
Which of the following conditions is not necessary to observe an interference pattern between two sets of waves? Choose one answer. a. The waves must have the same wavelength. b. The waves must have a constant phase difference. c. The waves must have the
asked by ashley  
chemistry
how many iron atoms are in 0.550 mol of Fe2O3?
asked by lizzy 
PHYSICS
The input piston of a hydraulic press is 20mm in diameter, and the output piston is 10mm in diameter. an input force of 1.0N will produce an output force of: a 0.25N b 0.50N c 2.0N D 4.0N
asked by DMITRIC 
Chemistry
19.2 mL H2SO4 solution (d = 1.727 g/mL, 80.0 percent H2SO4 by mass) ____ mol
asked by Dewey 
Chemistry
if some volatile impurities in the crucible are not burned off in step 1 but are removed in step 4 is the reported percent mass of water in the hydrated salt too high or too low?
asked by Mary 
Chemistry Help
Example: Sulfur Trioxide Chemical formula: SO3 Valence e: ? Needed e: ? Difference/Bond: ?? Please help me!
asked by Toni Jones 
math
What is the critical z used to form a 85% confidence interval?
asked by Heaven 
chemistry
According to the following reaction, how many moles of Fe(OH)2 can form from 175.0 mL of 0.227 M LiOH solution? Assume that there is excess FeCl2. FeCl2(aq) + 2 LiOH(aq) â†’ Fe(OH)2(s) + 2 LiCl(aq)
asked by yr 
Corporate Finance
A project cost $1 million and has a basecase NPV of exactly zero (NPV = 0). What is the projects' APV in the following cases? a. If the firm invests, it has to raise $500,000 by a stock issue. Issue costs are 15% of net proceeds. b. If the firm invests,
asked by Big TEE 
physics
The sixth harmonic of a 70 cm long guitar string has a frequency of 557.14 Hz. What is the velocity of sound in the guitar string?
asked by ashley  
algebra
Put the equation in the form ax2 + bx + c = 0. Enter exponents using the caret ( ^ ). For example, you would enter 4x2 as 4x^2. 82x2=(x+2)27
asked by miranda 
chemistry please help
Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity of oxygen: 141 kJ/mol
asked by Joanie 
physics
Where should the birthday candle of height 5 cm be placed in front of a convex lens of focal length 15 cm so that a real image will be formed at a distance of 25 cm from the lens? What is the height of this image?
asked by ashley  
Chemistry(check my work)?
An equilibrium mixture of the following reaction was found to have [COF2] = 0.255 M and [CF4] = 0.118 M at 1000°C. What is the concentration of CO2? 2 COF2(g) > CO2(g) + CF4(g) Keq = 2.00 at 1000°C I know I need to put the numbers in the equation so
asked by Rachel 
math
the growth in population of a small town since 1996 is given by the function P(n)=1250(a.03)^n c) determine the poulation in the year 2007
asked by Navroz 
chemistry
What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?
asked by Ashley 
Math 214
How do you find the volume of a right circular cone with a hemisphere? The height of the cone is 8 cm and the radius in 4cm.
asked by Calli 
chemistry
A hexane solution contains as impurities 5.2% (by mass) hepatne and 2.9% (by mass) pentane. Calculate the mass of each component present in 93g of the solution.
asked by Pat 
business
. George Wilkins checked the spreadsheet where he keeps track of his assets and liabilities. He discovered that (i) he owes $80,000 on his house, which he believes to be worth $150,000; (ii) his car is worth $20,000, against which there is $2,000 on the
asked by Susana 
Business
George Wilkins checked the spreadsheet where he keeps track of his assets and liabilities. He discovered that (i) he owes $80,000 on his house, which he believes to be worth $150,000; (ii) his car is worth $20,000, against which there is $2,000 on the
asked by Susana 
Charts
I have to construct a 2column comparison chart that lists three similarities and three differences between the Ojibwa Vision Quest and the Outward Bound Solo Experience. I'm not sure of what to do with it.(ex. what belongs where)
asked by Alex L. 
Chemistry
50 mL of a 2.5 M solution of ammonium phosphate is added to 100 mL of 1.5 M solution of calcium nitrate. At the end of the reaction 11.2 grams of solid product were obtained. Whats the % yield of this reaction?
asked by Hillary 
Chemistry
Okay, this is a question in several parts that really stumps me: Given the following reaction determine the rate of expression (CH3)3CBr + OH > (CH3)3COH + r [(CH3)3CBr] OH Initial reaction rate (mol L1 sec1) .10 .10 1.0 x 10 ^ 3 .20 .10 2.0 x 10 ^
asked by Wendi 
algebra
Sheila leaves her home to go to her sister's house, which is a 24mile drive. The trip takes 36 minutes. She returns home taking the same route at a speed that is 5 miles per hour faster. How many minutes did the trip home take? I came up with 33 is this
asked by mary 
Business writing
Using either full block or modified block, draft a letter to Mr. Dittmer to set up the seminar. Your letter must have at least two paragraphs and at least eight complete sentences. Include the following items in your letter: a. Thanks for the company’s
asked by jacqui 
Chemistry
If 0.823g of an unknown gas occupies a volume of 702.0 mL at 38.9 deg. Celsius, and 726.2 mm Hg pressure, what is the molar mass of the gas? (pressure has already been corrected for water vapor pressure)
asked by Carla 
math
Hector owns science fiction novels, coming c books, and mystery novels. He has half as many science fiction novels as comic books and he has three times as many mystery novels as comic books. If he owns a totals of 54 books how many of those book are
asked by Cole 
math
Find the volume of a solid generated by revolving the region bounded by y=secx and y=0 and x=0, xpi/4 about the x axis. Don't evaluate. Please help!!!! Also, what si the average value of this equation? I don't understand what that means.
asked by olivie 
chemistry
balance the redox equations: IO3(aq) > I2(aq) and I(aq) > I2(aq) balance the redox equation: S2O3(2) > S4O2(2) and I3 > I
asked by Jake 
mechanics
a non uniform rod ab of length 4 m and mass 5 kg is in equilibrium in horizontal position resting on two supports at point C and D wgere AC= 1 m and AD= 2 m. the magnitude of reaction at C is half of the reaction at D. Find the distance of the centre of
asked by sufyaan 
chemistry
A salt solution can be acidic, basic, or neutral. when dissolved in water, which of the following salts will make the solution basic: KCl, FeCl3, NaNO3, CaCO3, LiF, and NH4Br?
asked by max 
Chemistry
A salt solution can be acidic, basic, or neutral. when dissolved in water, which of the following salts will not affect the pH: KCl, FeCl3, NaNO3, CaCO3, LiF, and NH4Br?
asked by max 
Chemistry
In a reaction vessel, 2.4 mol of Al(OH)3 and 5.3 mol of H2SO4 react. Products: Al2(SO4)3, H2O [I know...] Moles of Al2(SO4)3 in container:1.2mol Moles of H2O in container:7.2 mol [But not...] Moles of excess reactant in container:____mol how do i find it?
asked by Marriot 
Statistics
Suppose that more than a decade ago high levels of lead in the blood put 81 percent of children at risk. A concerted effort was made to remove lead from the environment. Suppose, according to a survey, only 5 percent of children in the United States are at
asked by Brenda 
statistics
Suppose that 62 percent of the people who are murdered actually knew the person who committed the murder. Suppose that a detective file in Boston has 62 current unsolved murders. What is the probability that fewer than 33 victims did not know their
asked by Brenda 
Chemistry
A buffer is prepared by mixing 45.0 mL of 0.15 M NaF to 35.0 mL of 0.10 M HF (Ka = 6.8x10^4) Calculate the pH of this buffer after 5.0 mL of 0.05 M HCl is added.
asked by Sam 
Calculus
Find any absolute maximum and minimum and local maximum and minimum for the function f(x)=x^34x+5 on the interval [0,5). Make sure to prove that these points are max/min values. THis is what I did. f'(x)=3x^24=0 x= +/ 2/sqrt3 2/sqrt3 is outside of
asked by Janet 
Chemistry
Compound A reacts with element B (a halogen) to form compounds C and D as the only products. When 2.000 grams of B react with an excess of sodium metal 2.363 grams of the sodium halide are formed. Compound A is a volatile liquid at room temperature with a
asked by Patrick 
physics
In a room that is 2.78 m high, a spring (unstrained length = 0.30 m) hangs from the ceiling. A board whose length is 1.94 m is attached to the free end of the spring. The board hangs straight down, so that its 1.94m length is perpendicular to the floor.
asked by isabel 
calculuc
A rectangular box without a lid is to be made from 12 square meters cardboard. Find the maximum volume of such a box.
asked by daniel 
Physics
A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic friction
asked by Brittney 
physic
The electrons in a metal that produce electric currents behave approximately as molecules of an ideal gas. The mass of an electron is me = 9.109·1031 kg. If the temperature of the metal is 287 K, what is the rootmeansquare speed of the electrons?
asked by help me please:(( Urgetnt 
world history
How total was the transformation brought about by the industrial revolution?
asked by Pat 
accounting
Accountants follow ethical guidelines in the conduct of their work. What are these guidelines made for? Why are ethical principles considered important? In the event the accountants do not follow the ethical principles what do you think the effect would
asked by saidi 
english
how does ruby become experience in honey, baby, sweetheart? i really need help
asked by ted 
gymconflict management
one way to handle intergroup conflict?
asked by ted 
history
How did the American colonies win their freedom in the American Revolution?
asked by Jill 
physic
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. Suppose the compression ratio (ratio of volumes) of a specific diesel engine is 24 to 1. If air enters a cylinder at 1
asked by help me please Urgetnt 
English
I really have the following doubts. Can you see if my corrections are OK? Thank you. 1) He is expected by his friends (is wrong?) to be discharged today. I wish I hadn't got (Is this possible?) two tests tomorrow. 2) Do you always make breakfast by
asked by Mike1 
chem repost
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the
asked by please, help me 
Character Buidling
My Character Building Teacher had given me a project to write the names of the people we hate on a nonboiled raw potato, and put it inside a clear plastic, locked, and not to be opened until the project is finished. Everyday, we should take an observation
asked by Elizabeth 
math
If you were standing in the back of a truck moving at 70 mph, and you threw a baseball in the opposite direction at the same speed, would it just fall straight down?
asked by Anonymous 
information systems
how can we say that a data should be relevant and verifiable?
asked by mimi 
history
I need a paragraph on how the immigration act was improtant in the 20s, and how it affected America.
asked by Sam 
Business Law
Benner imports Inc, an automobile dealership, placed an advertisemet in the chicago sun times to sell a station wagon. The advertisement displayed a price that was $700 lower than the dealership had indicated in the advertising copy sent to the newspaper.
asked by Sarah 
math
A garden has a total of 10 flowers. Three are yellow, two are white and five are blue. If you select 2 at random without replacement, find the probability that:a. none of the flowers are yellow. b.at least one of the flowers is yellow.
asked by Kim 
English
In the fairy tale Sleeping Beauty... there is person vs person. What is the reasoning behind the royal family vs. the god mother?
asked by Heather 
Programming
I’m using VB 2008. I need to write a simple program that calculates total sales of purchases. The program should accept item costs as input calculate the tax on each item (8%) display the item cost, total cost, and total after taxes. Item costs will be
asked by Brenda 
gympower imbalances
what makes a coach a powerful individual. for example, he is rich and educated but i need more examples like that and also what makes an athlete less powerful. for example, poor and uneducated but this has to be the opposite of examples of the coach
asked by ted 
Chemistry College Level
36.85 mL of a KMnO4 solution when acidified reacted with 1.076g of Mohr's salt, Fe(NH4)2(SO4)2 x 6H2O What is the normality of the KMnO4 solution? How do I set this up? I can't figure it out at all...
asked by Tichele 
Programming
I’m using VB 2008. I need to write a simple program that calculates total sales of purchases. The program should accept item costs as input calculate the tax on each item (8%) display the item cost, total cost, and total after taxes. Item costs will be
asked by Brenda 
physics
I keep getting the wrong answer... A solar model is used to calculate the expected temperature and density at all depths within the Sun. These results are then used to calculate the expected fusion rate within the Sun. We have confidence that the model is
asked by Misty 
English
I still have a few doubts on the use of "earlier". I included other five sentences I'm really doubtful about 1) Can't you say: Would you mind if I stopped working ten minutes earlier (than I'm expected to)? (If I write "before" or earlier without including
asked by Mike1 
math
Brown checked out 4 books and 1 videotape at the library. He returned them all 7 days late the library charges late fees at $3.00 per week for a video and $0.15 per day for a book. Write an expression that represents browns change if he paid his late fees
asked by Dylan 
Chemistry
If the amount of radioactive iodine123 in a sample decreases from 0.8 g to 0.1 g in 36.2 hours, what is the halflife of iodine123
asked by Sara 
Calculus
I don't understand how to answer this problem: The base of a solid is bounded by y=x+1 and y= x^21. Find the volume of the solid if the cross section is perpendicular to the x axis are equilateral triangles.
asked by Alexandra 
secondary school
which is the formula that describes process to transform Fe3+ to Fe2+ thanks to HCl in the stomach?
asked by Lucia 
Calculus
The base of a solid is bounded by y=2sqrtx, y=2 and x=4. Find the volume of solid if cross sections perpendicular to y=2 are semicircles
asked by Alexandra 
Chemistry
Ammonium sulfate reacts with a solution of sodium hydroxide to produce sodium sulfate, ammonia gas and water. Calculate the yield in grams of ammonia gas that would form; and the amount of excess reagent in grams that would be left in the flask, after 9.92
asked by John 
stats
how to work this math problemAn archaeologist has 250 animal bone fragments from prehistoric site of these 195 are whitetail deer bones. Construct the 90% confidence interval for the percentage of bone fragments from this site that are from whitetail
asked by Donna 
Chemistry
when 5.00 g of CaCl2 dissolves in 50.0g of water, what is the boiling point of the solution
asked by Leah 
Math Binomial theorem
I'm preparing for a test and one of the questions in my text is as follows: In a trivia contest,Sam has drawn a topic he knows nothing about, so he makes random guesses for the 10 T/F questions. Use the binomial theorem to help find a)the number of ways
asked by ann 
English
I forgot to include the following sentences. I was sorry for Thomas's bad result in Italian (in his Italian test?) He got a very low mark. He led (?) a merchantilist policy. I behaved badly with (also towards) her.
asked by Mike1 
Stat
P(A)=.10, P(B)=.30, P(C)=.40, P(D)=.10, P(F)=.10. Determined the expected grade and variance for the course.
asked by RB 
math
what is 400% and 40% as a decimal???
asked by Erika 
CHEMISTRY
C6H12O6= 2C2H5OH + 2CO2 WITH 1KG OF GLUCOSE, WHAT IS THE MAX AMOUNT OF ETHANOL (INGRAMS OR LITERS) THAT CAN BE OBTAINED BY THE PROCESS. (DENSITY OF ETHANOL= 0.789g/ml.
asked by DANA 
finance
The corporation earns $3 per share before taxes. once it has paid taxes,it will distribute the rest of its earnings to you as a dividend.The corporate tax rate is 35%,and the personal tax rate on income is 20%. How much is left for you after all taxes are
asked by tiffnay 
math
and what is 4% and 0.4% as a decimal?
asked by Erika 
Chemistry
When electricity is applied to a molten binary salt, the cation will be reduced and the anion will be oxidized. The electrolysis of CaBr2(l), for example, produces Ca(s) at the cathode (from the reduction of Ca2+) and Br2(l) at the anode (from the
asked by Anonymous 
CHEMISTRY
Fe2O3 + 3CO= 2Fe + 3CO2, SUPPOSE THAT 1.64kg OF Fe ARE OBTAINED FROM A 2.62kg SAMPLE OF Fe2O3(ORE). ASSUMING THE REACTION IS COMPLETE, WHAT IS THE PERCENT PURITY OF THE Fe2O3 IN THE ORIGINAL SAMPLE?
asked by BECKY 
Chemistry
When electricity is applied to a molten binary salt, the cation will be reduced and the anion will be oxidized. The electrolysis of CaBr2(l), for example, produces Ca(s) at the cathode (from the reduction of Ca2+) and Br2(l) at the anode (from the
asked by Anonymous 
calculus
volume of solid whose base is a circle with radius a, and cross sections of the solid cut perpendicular to the xaxis are squares
asked by judy 
English
I am doing an american dream essay and I am trying to start the introduction. I want to use an illusion (historical or literary) is fine. Can I have some suggestions please thank you
asked by Linda 
college math
the perimeter of some traffic sign must be 128 inches the length is 14 inches longer than its width
asked by tracie 
Communication
One way to make online communication more effective
asked by Theresa 
Math
Can someone help me verify if this is correct? Gasoline usage for compact cars in Canada is a normal distribution with a mean of 33.3 km/l and with standard deviation of 7.3 km/L. Round your answers to one decimal place. a) What percentage of compact cars
asked by Jay 
science
How many people in CANADA die each day from cancer. I cant find any results for Canada. Thanks so much. :)
asked by Help me please :P 
math
How many possible outcomes are there for 15 coins tossed simultaneously?
asked by Zac 
math
ingrating e^(()x^2)in the limits 0 and infinity
asked by sai nishanth 
algebra
When the like terms are the same number but opposite (positive and negative) would they cancel each other out?
asked by bianca 
trig
Multiply: 5(cos Pi/3 + i sin Pi/3)times 2 (cos Pi/4 + i sin Pi/4) and leave the answer in trigonometric notation.
asked by Jackie 
science
two ways gravity can effect the movement of a wheel and axel in a bicycle
asked by cody 
Math 7th
Ms.Anderson took a walk down her street. She noticed on her walk that her house is 2 blocks south of the post office, the grocery store is 1 block north of her house and her house is the midpoint between the post office and the video store. Which best
asked by Anonymous 
math
differentiate y=πtsin(πt6) help please, Thanks!
asked by daf 
English
I urgently need to revise these questions. I don't know how to express questions number 1 and 4. Thank you 1) Refer to Owen’s poem “Dulce et Decorum est” and briefly summarize the content of each stanza in your own words. Focus in particular (?) your
asked by Mike1 
minal justice
I need help on this question: day 7 assignment: Gang development and Control write a 400600 word response paper discussing the four theories about how gang develop (Anthropological view, Social Disorganization, Psychological view, and Rational Choice
asked by paula 
Chemistry
If 40 g of KNO3 is dissolved in 100 mL of water at 25 degrees celisus, what will the final temperature be?
asked by Allison 
math

English
I forgot to add these other questions. Could you please check questions 1,3 and 5 (I'm most doubtful of). 1) Focus your attention (I need a synonym) on the last Chapter of R.L. Stevenson’s “Dr. Jekyll and Mr. Hyde” and point out the fundamental truth
asked by Mike1 
How many sig figs?
An equilibrium mixture of the following reaction was found to have [H2] = 0.020 M and [I2] = 0.020 M at 340°C. What is the concentration of HI? H2(g) + I2(g)> 2 HI(g) Keq = 69 at 340°C I got .166 but it said check number of sig figs so im guessing its
asked by Rachel 
trig
What is the trigonometric notation for 33(sqrt3i)?
asked by Jackie 
Communication
How do the components and processes of communication apply to the electronic/computer chanel
asked by Theresa 
Math
Tom's new CD player has a 9disc changer. If she owns 45 CDs, in how many ways can he choose 9 CDs to listen to? After picking 9 CDs, in how many ways can he order them in the 9 slots of the changer?
asked by Tracy 
chem repost for bobpursley
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the
asked by please, help me 
Intro to Statistics
Two cards are drawn at random from a standard 52card deck of playing cards without replacement. Find the probability that the first card is a heart and the second is red.
asked by Terry 
physics
A certain star is 10.9 lightyears away. How long would it take a spacecraft traveling 0.960c to reach that star from Earth, as measured by observers in the following locations? on earth on spacecraft
asked by iqra 
English
I'm reposting some sentences because you didn’t answer all my questions. In particular : Can you please tell me if the position of "in particular" is correct in 1? In sentence 2 is “hope” a good choice? In sentence 3 which is the best position for
asked by Mike1 
economics
productivity....as a result of the ..... .... .
asked by Katya 
statistics
) If this data were normally distributed, determine the probability that the sample mean would be as far away from the population mean or more so
asked by bruce 
Statistics
I have a take home test I am working on. Any help would be appreciated. Professor does not teach from a book so am not sure how to apply this problem to the regression equation. Thanks in advance. Problem below. Cell Phone Mins= 3.5*cost + 25 where cell
asked by SROBSON 
Chem (repost)
Hydrogen and carbon dioxide react at a high temperature to give water and carbon monoxide. H2(g) + CO2(g) > H2O(g) + CO(g) (b) Suppose 0.052 mol each of H2 and CO2 are placed in a 1.5 L container. When equilibrium is achieved at 986°C, what amounts of
asked by Rachel 
math
An amount of $3000 was deposited in a bank at a rate of 2% annual interest compounded quarterly for 3yrs. The rate then increased to 3% annual interest and ws compounded quarterly for the next 3 yrs. If no money was withdrawn what was the balance at the
asked by yenny 
chem
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the
asked by marie 
science
How much money does CANADA spend each year on space explorations? thanks
asked by Help me please :P 
English
Thank you very much for explaining to me the best choice. I still have a few sentences I'm doubtful of. I included 7 doubts using question words. Thank you 1) Sometimes my parents aren't at home for (?) their work and so I have to stay at home alone with
asked by Mike1 
world history
Hello! Can someone help with this? How did women come to wear jeans? Was it a sign of rebellion or sense of style or just a long lasting trend?
asked by Lennaid 
physics
1. A sound is made by a speaker, which then radiates in all directions. The sound wave is described by A(r) sin(2r  600t) where the distances are in meters, and the time in seconds. The A(r) just indicates that the amplitude has some distance
asked by kelsey 
chemistry
which of the following is a weak base? Why? a. KOH b. NH4+ c. CH3 2 d. HF e. H3PO4
asked by Marriot 
math
A Turbine 14 feet in diameter spins at 2,100 rotations a minute. How fast is a spot on the edge of the turbine going per minute? Using 22/7 for pi My answer is 92,400ft per min is this correct?
asked by mary 
Math(Please help)
f(x,y)= 10x^1/3 y^2/3 Compute (27,64) so 10(27)^1/3 * (64)^2/3 10 * (27)^1/3 * (64)^2/3 I know that the answer is 480 but I am having a hard time calculating 27^1/3 and 64^2/3.
asked by Hannah 
Lincoln high, Algebra 2
Find the inverse of y=6x2+4
asked by Tyrone mcCauley 
Biochem
What concentration of competitive inhibitor is required to yield 75% inhibition at a substrate concentration of 1.5x103 if Km=2.9x104 and Ki=2x105?
asked by Bradley 
English
1. What is ECTO:1? (Is ECTO a model of a car?) 2.SLIMED! Lose all your points. (In a game on a computer,there is a green ghost and the expression in #2. Then what does "SLIMED" mean? ) 3. Marshmallow Man (Is it a character?)
asked by rfvv 
Math
Mario has large drawer with only white and blacks socks. He has 3 times as many blacks socks as white socks. If Mario randomly selects 10 socks what other info is necessary to do.dthe probability that he wi get at least 3 pairs of blacks socks. F. Total
asked by Taytay 
math
Assume that 25% of the student body at your school is male and that 40% of the students walk to school. If a student from this school is selected at random, find the following probability.
asked by Cassidy 
Math
Check my answer please? Yuri is wrapping presents. The first box measures 9 inches by 12 inches by 2 inches. He has a second box with dimensions that are each half of the length of the first box. How does the surface area of the second box compare with the
asked by Sammy 
science
how long have we been sending people into space? Or.. when did space exploration start?
asked by Help me please :P 
calculus
A spring exerts a force of 4x lbs when it is compressed a distance of x feet. How much work is required to compress the spring a distance of one inch?
asked by Anonymous 
calculus
A metal chain weighs 30 lbs and is 10 feet long. How much work is required to lift one end of the chain to a height of 15 feet (so that the other end of the chain will be at a height of 5 feet)?
asked by Anonymous 
calculus
Find the center of mass of the region bounded by the curve y = x3  4x2 +3x ; the xaxis ; x = 0 ; x = 1
asked by Anonymous 
chemistry
Which molecule or compound below contains a polar covalent bond? Student Response A. NCl3 B. C2H4 C. ZnS D. AgCl E. LiI
asked by candy 
calculus
An object moves in such a manner that its velocity at time t is given by v(t) = t3  4t2 + 3t At t = 0, it starts at position x = 0. During the interval [0, 4] what is the net distance moved?
asked by Anonymous 
math
a contruction worker drops a hammer from a height of 50 feet. after how many seconds will the hammer land on the ground?
asked by Anonymous 
economics
Consider a project with a positive rate of return. Suppose the discount factor solutions to the equation which determines the internal rate of return (ROR) of the project are given by 0.8502, 2.0207, 0.1767. What is the project's ROR?
asked by Rachel 
Math
1. In this problem, we analyze the profit found for sales of decorative tiles. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product depending on how much of that product is available on the open market.
asked by EJ 
Math
find the derivative f(x)= 4xe^x f(x) = ln (2z11)^7 f(x) = ln (x1/3x+1)
asked by tom 
chem repost
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the
asked by please, help me x( 
economics
Tom plans to gamble each year for the next 20 years, starting at at the end of year 1. If he loses 4.47 dollars in odd years (i.e., years 1, 3, 5, etc) and wins 7.46 dollars in even years (i.e., years 2,4, 6 etc), what will be Tom's (internal) rate of
asked by Rachel 
math
how do you calculate the maximum volume of a cylinder?
asked by Carly 
chemestry
Given 10.0 L of N2 at  78°C. What volume will the N2 occupy at 25°C (P is constant)?
asked by Anonymous 
Math
For the function y = x^42x^2+1 Identify all relative extrema. Identify any points of inflection. Identify the absolute extrema on the interval [2,3]
asked by Anonymous 
Chemistry
What must be the concentration of F to just start precipitation of SrF2 from a solution which is 1.202*105M i Sr(NO3)2? Ksp = 2.900*109
asked by Jude 
Math(Please help)
what would 8^2/3 be. 2^3 = 8 so would it be 2?
asked by Hannah 
chemistry
A sample of O2 gas was collected over water at 23ºC and 711 torr. What is the partial pressure of the O2? (The vapor pressure of water at 23ºC is 21.2 torr.) Partial pressure of O2:_______torr
asked by Anonymous07 
economics
Jerry will receive the following payments: 946 in year 3, 929 in year 5 and 958 in year 9. What is the purchasing power of the present value of these payments if the market interest rate is 17% per year and the inflation rate is 6% per year?
asked by Rachel 
algebra
5/11+1/4
asked by Anonymous 
physics
Consider a single photon of red laser light, with wavelength of 633 nm (nano is 109). What energy does this carry? What momentum? How does the energy compare to typical atomic energies of a few times 1019 J?
asked by maggie 
Chemistry
To determine the value of ÄG°f(AgI2–(aq)), a researcher measured the concentrations at equilibrium to be: [I3–]eq = 4.07 M and [I2]eq = [AgI2–]eq = 0.686 M at 298 K. 2 Ag(s) + 2 I3–(aq) 2 AgI2–(aq) + I2(aq) ÄH°f(kJ/mole)/S°(J/k mole/ÄG°f
asked by Krys 
IT 240
2. You are the network administrator for a company that has a peertopeer network. How would the pieces and components of this network relate to each other? Define all of the components of this type of network.
asked by Daniel 
Math
a woman's clothing chain store, found that t days after the end of a sales promotion the volume of sales was given by S(t)= 20,000 (1+e^.6t), 0 less than or equal to t less than or equal to 5 dollars. find to the nearest dollars the rate of change of
asked by Anonymous 
Calculus
Use Newton's Method to approximate the root of the function f(x)=e^x5x when the intial point chosene is x1=1.5. Do two iterations. This is what I did, but not working. f'(x)=e^x5 x2=1.5  (e^1.5(5(1.5))/e^1.5 (5)) =1.5(4.48177.5/4.48175)=1.55.8234=
asked by Janet 
English
Thank you very much for all your corrections. Here are a few sentences on Chaucer's the prioress I'd like you to check. 1) In contrast to the nun’s order she showed off and wore ornaments. The nun’s behaviour is contrary to monastic rules (or contrasts
asked by Mike1 
Math
P = 2l + 2w A = lw P = 4s A = s2 C = ðd A = ðr2 Use 3.14 for ð. Lawrence has planted a round flower garden in his back yard. The garden is 8 feet across. How many feet of fencing does Lawrence need to enclose the flower garden?
asked by Aurbry 
social studies
why may a historian call Niccolo Machiavelli "The firsmodern Italian
asked by Sabrina 
algebra 1
how do you graph quadractic function
asked by myles 
Math repost
P = 2l + 2w A = lw P = 4s A = s2 C = ðd A = ðr2 Use 3.14 for ð. Lawrence has planted a round flower garden in his back yard. The garden is 8 feet across. How many feet of fencing does Lawrence need to enclose the flower garden? My question is which
asked by Aurbry 
Algebra II
1) There is a solution to x = (y5)^2 and x = (y 5 )^2 + 7 a) true b) false 2) There is no real solution to y = 1 and y = x^2 + 9 a) true b) false 3) the vertex of the graph of y = 3(x+ 9)^2 + 5 is a minimum value ? a) true b) false 4)find the center
asked by anonymous 
Algebra
What can you multiply to get 5 and add to get 6 (two numbers both the same numbers)??? Help
asked by Alex 
Math
Triangle ABC is an obtuse triangle with two congruent angles. If m< C = 108 write an expression that represents m
asked by Dani 
psychology
Imagine that Rasmussen College has asked the psychology department to research the study habits of its students
asked by Ria 
math
estimate the answere by clustering 95+91+89+94
asked by jackie 
physics
How will the length of the cord influence the period of the pendulum?
asked by ashley  
kinematics
A tennis ball is hit with a resultant velocity of 70 m/s^1 at 20 degrees. What are the vertical and horizontal velocities?
asked by Madeline 
CHEMISTRY!!!
Calculate the equilibrium constant for the following reaction of a weak acid and base HF + NH3 NH4+ + F given Ka (HF) = 6.9 x 10^4 and Kb (NH3) = 1.8 x 10^5 and Kw = 1.0 x 10^14
asked by max 
math
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 Heaven 
math
In 1994 the life expectancy of males in a certain country was 72.7 years. In 2oo1, it was 74.8 years. Let E represent the expectancy in year T and let T represent the number of years since 1994. The linear function E (t) that fits the data is
asked by Anonymous 
Math
draw at least two shapes with an area of 6 square units and a perimeter of 12 units
asked by Rayna 
English
For a project im writing about 1950's food and the food that was unique to that time. But, in my report i also have to compare a literary work to the information i find on 1950's food. my teacher said the best work would be like a poem, song, article about
asked by Hannah 
math
solve using the substitution method: 8x+5y=12 x=124y
asked by josh 
Math
A florist has access to 9 types of flowers and 8 types of foliage. He makes bouquets using 4 types of flowers and 3 types of foliage. How many different bouquets can he make?
asked by Meghan 
Math
how would i find X if i have .1386 = x^3 ???
asked by Sam 
human resources
I am preparing a line budget and a functional budget. I need to know how a functional budget example look. There are two different programs; one program uses 60% and the other 40%, I need an example of how the budget should actually look.
asked by HELP 
English
Can you please tell me if the following sentences have the same meaning (sentence 1)? I included other doubts. Thank you 1) Do you always make breakfast yourself/by yourself/ on your own? (Meaning without the help of others) 2) I help my friends when they
asked by Mike1 
Math
Can someone help me verify if this is correct? Gasoline usage for compact cars in Canada is a normal distribution with a mean of 33.3 km/l and with standard deviation of 7.3 km/L. Round your answers to one decimal place. a) What percentage of compact cars
asked by Jay 
Math
A baseball team has 15 members, 3 of whom always play and bat at the top of the batting order. For the game Sunday, the starting lineup of nine players will be filled out from the remaining members and a batting order will be set.
asked by Luke 
Physical science
Why is it easy for a magnesIum(mg number 12) To lose 2 electrons. Is it because the nuclear charge of the mg atom is relatively weak?
asked by Jules 
Psychoanalyis
In the film Inception, how is the Oedipal Complex present?
asked by Misty 
Chemistry College Level
Ok, so here's my question: If exactly 14.563 grams of KMnO4 were dissolved to yield 750 mL of solution waht would be the normality of the KMnO4? From a previous question (that this question says to refer to) we have: MnO4 +8H+ +5e > Mn2+ +4H2O I'm not
asked by Tichele 
English Quick?
When writing a paper and you say in the book "Ann Frank" the author uses...... Is the title of the book italized or is italized and in quotes?
asked by Heather 
Math
A teacher is trying to pick 7 students to represent his class at an upcoming state competition. If there are 18 boys and 10 girls in the class, in how many ways can the teacher pick 4 boys and 3 girls to attend the event?
asked by Meghan 
pre cal
assume the angle is in the first quadrant, and sin theta equals 1/5. what is sin 2 theta?
asked by ali 
chemistry
I posted a question similar to this one a few days ago and someone helped me with it. but now im on a similar one and i did the same thing to find the answer but it was wrong. what am i doing wrong? An equilibrium mixture of the following reaction was
asked by Rebekah 
Physics
A small fly of mass 0.26 is caught in a spider's web. The web vibrates predominately with a frequency of 4.6 . a)What is the value of the effective spring stiffness constant for the web? b.)At what frequency would you expect the web to vibrate if an insect
asked by JoseCuervo 
algebra
solve 0.9x < 5x
asked by debbie 
English 1
I have to write a dumb dinosaur story. The textbook says you'll need to invent a way for humans to enter the story, but that's not necessarily so  perhaps your story is from the point of view of a dinosaur or a prehistoric plant or even a volcano Write
asked by surfsupmel 
chem repost
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the
asked by please, help me x( 
Chemistry
I'm having trouble with the following question, any help would be greatly appreciated. A voltaic cell consists of a Zn/Zn^2+ halfcell and a Ni/Ni^2+ halfcell at 25 C . The initial concentrations of Ni^2+ and Zn^2+ are 1.30 M and 0.100 M , respectively.
asked by Rick 
mat
Sara invested money at a bank that paid 3.5% annual interest compounded quarterly. If she had $4650 at the end of 4 yr what was her initial investment?
asked by yenny 
ChemMolality
What are the boiling point and freezing point of a 0.22 m solution of sucrose in ethanol? Can someone help me with this quickly? I'm SO confused~!
asked by Hai 
math
a money market fund pays 14% annual interest compunded daily. What is the value of $10,000 invested in this fund after 15 yrs?
asked by yenny 
trig
what is the cube root of (64i)?
asked by Jackie 
Statistics
Professor does not teach from a book so am not sure how to apply this problem to the regression equation. Thanks in advance. Problem below. Cell Phone Mins= 3.5*cost + 25 where cell phone mins measure the number of minutes per month and cost is the dollar
asked by SROBSON 
mk
How does MSTN TV stack up when you consider the characteristics that help a new product move through the life cycle more quickly?
asked by ak 
Math
The radius of a disk grows at 2cm/s. Calculate the growth rate of the disks area when the radius mesures 7 cm. (Designate the area of the disk with A and the radius with r) A) Find the relation between A and r B) Find the derivative of this relation on
asked by Ralph 
chemistry
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the
asked by marie 
STATISTICS
A) If a regression experiment has correlation coefficient r= 0.75, what precent of total variation is explained by the regression? B) if 85% of total variation is explained by the regression, and there is an inverse relationship between y and x, then what
asked by SROBSON 
Chemistry
What is the solubility of Ca(OH)2 at a pH of 4.802 Ksp of Ca(OH)2 = 6.500*106
asked by Jude 
math
how to solve 2x+3y=17 3x+y=31 then 2(x3y) y=3x2 then the last one 2(x+4) x+y=17 please help
asked by hannah 
Chemistry
What is the concentration of Ni2+ in 0.0775M Ni(NO3)2 and 1.3981M NH3
asked by Jude 
Chemistry
What must be the concentration of F to just start precipitation of SrF2 from a solution which is 1.202*105M i Sr(NO3)2? Ksp = 2.900*109
asked by Jude 
algebra
Essay; show all work. Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 7x3 + 6x2 – 6x – 3. The shop estimates their costs for that quarter to be given by 6x2 – 9x + 9. For the second quarter, find
asked by kozy 
Chemistry
Example: Sulfur Trioxide Chemical formula: SO3 Valence e: ? Needed e: ? Difference/Bond: ?? Please help me!
asked by Toni Jones 
english
how does ruby become experience in the novel honey, baby, sweetheart by Deb Caletti? i really need help
asked by ted 
Algebra1
Use an equality One side of a rectangle is 12 inches and the other is x. What value of x will make the perimeter at most 44 inches.
asked by sweets 
MGT 330
List at least three reasons why workers might be more satisfied with their jobs than in the past. The post should include at least one reason why you think workers may be more motivated by job security rather than salary and benefits in difficult economic
asked by Melba 
Calculus
let f(x)=x^3(e^x) Answer using calculus, use graphing calculator only to check work. a) Find the local and global extrema of f. b) Find the intervals where f is increasing/decreasing. c) Find the inflection points of f. d) Find the intervals where f is
asked by Janet 
Chemistry
When electricity is applied to a molten binary salt, the cation will be reduced and the anion will be oxidized. The electrolysis of CaBr2(l), for example, produces Ca(s) at the cathode (from the reduction of Ca2+) and Br2(l) at the anode (from the
asked by Anonymous 
PreCalc/Trig
1. Find all possible values of k so that (3,5), (5,1), and (k,8) are the vertices of a right triangle 2. Find all points with x+2y=0 so that (x,y) is 5 units from (1,4) 3. (f(x+h)f(x))/h for f(x)= 5/(x+2) 4. The frequency of the sound produced by a
asked by Mia 
math
Jill is the leading socrer on her basketball team, with an average of 13.2 ponts per game. Which best dscribes Jill's scoring average: rate or ratio?
asked by fran 
english
what is an example of a hyperbole (with the chapter number) in animal farm
asked by jamie 
statisticsneed formula for the following
stuck on steps 2 and 4 of hypothesis testing. Need a formula to complete. please help... A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small
asked by unknown 
animal farm
what is the mood in animal farm?
asked by krystal 
Computers
I have project i need your help. this is the Project Description In this project, you will design a complete arithmetic unit of a microprocessor which can do addition, subtraction, multiplication, and division of two 2bit binary numbers (A1A0 and B1B0).
asked by Sara 
geo
explain three reasons for which the central location of india at the head of the indian ocean is considered of great importance?
asked by akanksha 
chemistry
We performed an experiment on UVVis Spectrometry, by testing the absorbance of KMnO4 and KCr2O7 solutions at different concentrations. We prepared the dichromate solutions with dilute sulfuric acid. Why didn't we use water, what is the purpose of sulfuric
asked by Amie 
English
I still have a few doubts on yesterday's sentences, especially on those concerning the use of the past perfect. I really hope you can see them. 1)His friends expect him to be discharged from hospital today. He is expected (by his friends is correct?) to
asked by Mike1 
gym conflict management
an example of interpersonal conflict? one way to deal with internal conflict? pls i really need help
asked by ted 
physics
A mass of 0.116 kg hangs from a vertical spring in the lab room. You pull down on the mass and throw it vertically downward. The speed of the mass just after leaving your hand is 5.60 m/s. (a) While the mass moves downward a distance of 0.04 m, how much
asked by Chris 
English
I forgot to include these other sentences.Thank you very much. 1) My friend lives in another city. If only he lived here/in the same place as I live. ("If only I lived there" is logically incorrect). 2) I broke a glass and I blame my friend. Since then we
asked by Mike1 
physics
A 10kg object is falling vertically through moist air. If its acceleration is observed to be 6 m/s/s, what is the resistance in newtons offered by the air?
asked by john 
Maths
The right rectangular prirm is the diagqam when x=7cm, y=5cm and z=1ocm
asked by Angel 
programming
Write a C program to sort the bags by weight. Assume that the input is given in a file. Each line of the input file corresponds to one polythene bag. For example a line in the file as below 10,20,20,10,10,50,10,50 corresponds to a bag containing four 10
asked by Anonymous