Questions Asked on
February 23, 2010

physics
2 waves are traveling through a container of nitrogen gas. Amplitude of the first wave is 0.3 cm, and the second 0.9 cm. What is true about the two waves? a. the energy of thee first wave is less than the second b. energy of the first wave is greater c.
asked by Toni 
general biology
Whcih property of water explains ice floating on the top of a pond rather than sinking to the bottom? a. surface tension b. freezing point at 0 celcius c. capillary action d. extensive hydrogen bonding
asked by Edwina 
biology
Smooth edged leaves (S) dominant over rough edged leaves (s). Two plants heterozygous for smooth edged leaves are crossed. What proportion of the offspring are expected to be smooth edged leaves? a. 1/4 b. 1/2 c. 3/4 d. 1
asked by BECKY 
general biologt
Water freezes in the crack in this boulder and expands. Over time pieces of the boulder will break off. What type of wathering effects is this an example of? a. wedging b. hydration c. carbonation d. reduced pressure
asked by Toni 
physics
3) A 5.0 kg book is sitting on a table. Which describes the force acting on the book a. there are no forces acting on the book b. the force of the table upward is greater than the force of gravity downward c. the net force on the book is zero d. kinetic
asked by amber 
College Physics
a 1200kg car coasts from rest down a driveway that is inclined 20degrees. to the horizontal and is 15m long. how fast is the car going at the end of the delivery if.... (a) friction is negligible (book answer is 10m/s) (b) a friction force of 3000n opposes
asked by eddy 
Physics
A child goes down a playground slide with an acceleration of 1.24 m/s^2. Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 32.0 degrees below the horizontal.
asked by Abby 
Chemistry
which has the highest lattice energy BaO or SrO
asked by Jack 
HCR/230
• Post a 200 to 300word response to the following: Compare cost control strategies of employersponsored health plans, in which employers buy from insurance companies, to selffunded health plans, in which employers cover costs of benefits. Include the
asked by Anonymous 
Chemistry
In the experiment Nitration of Methyl Benzoate why is it important to add the nitric acidsulfuric acid mixture slowly over a 15 minute period?
asked by Kendra 
Chemisrty
Calculate the theoretical amount of CaCl2 that would be required to change the temperature of 50 mL of water from from temperature 20 degrees Celsius to 45 degrees Celsius. Remember that the heat lost during the dissociation is equal to the heat gained by
asked by sakura_09 
Chem PreLab HELP!
Write the complete and net ionic equations for the following reactions. Be sure to indicate the states of the reaction products. 1) AgNO3(aq) + NaCl(aq) > 2) CaCl2(aq) + Na2SO4(aq) > 3) Pb(ClO4)2(aq) + NaOH(ag) > 4) (NH4)2SO4(aq) + BaCl2(aq)
asked by Macey 
chemistry
type of chemical reaction synthesis, decomposition, double or single K+B2O3=K2O+B
asked by norma 
chemistry II
to what temperature (C) would a solution containing C6H12O6 in 200g of water have to be heated to have a vp of 89.5 mmHg?
asked by heather 
chemistry
type of chemical reaction equation H3PO4+KOH=K3PO4+H2O
asked by norma 
physics
Hans uses a wheelchair. Although he has a rampto in his house, he finds it difficult to get his wheelchair up the ramp. Whcih modification would make it easier for Hans to get in his house? a. increase the length of the ramp b. increase the friction
asked by Leah 
Environmental Science
#35. In two or three welldeveloped paragraphs, list the populations that are affected by ultriviolet light and identify the effects on each of these populations. my answer: There are four major populations that are affected by ultraviolet light. These
asked by y912f 
Chemistry
What is the final temperature when 50.0 g of Chromium at 15 deg. C (specific heat of Cr = 0.107 cal/gdeg.) is added to 25 ml of 45 deg.C water?
asked by Mary 
managerial finance
Early in 2007, Inez Marcus, the chief financial officer for Suarez Manufacturing, ws given the task of assessing the impact of a proposed risky investment on the firm's stock value. To perform the necessary analysis, Inez gathered the following information
asked by jeffer 
physics
A 53.0 kg boy and his 41.0 kg sister, both wearing roller blades face each other at rest. The girl pushes the boy hard, sending him backward with a velocity 3.00 m/s toward the west. Ignore friction. (a) Describe the subsequent motion of the girl, and then
asked by Mathieu 
Physics
Mercury is poured into the open end of a Jshaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m
asked by Isabel 
Chemistry
Does one calorie equal 4.184 Joules?
asked by Anonymous 
Physics
If a proton is released from rest in a uniform electric field does electric potential at its position increase, stay the same, or decrese?
asked by Anonymous 
spanish
¿Va a viajar a Perú tu primo Andrés?
asked by Anonymous 
calculus
differentiate y=x^2x. show all work
asked by Anonymous 
chemistry
What is the molecular structure of the molecule AlCl3? What characteristic is notable about the structure that helps us to understand the acidic nature of AlCl3?Write a chemical reaction between AlCl3 and NH3 ignoring any reaction between AlCl3 and the
asked by kiki 
physics
Assume the height of a hill is 50m, calculate: a.the velocity of a car at the bottom ofg the hill b.the height at which it will have half the speed. Assume the car starts from rest at the top of the hill.
asked by bola 
writing
I need more facts about the GPS and compass to use in my writing piece.
asked by sierra (6th grade) 
Honors Chemistry
What is the molecular structure of the molecule AlCl3? What characteristic is notable about the structure that helps us to understand the acidic nature of AlCl3?Write a chemical reaction between AlCl3 and NH3 ignoring any reaction between AlCl3 and the
asked by HonorsChemistryKid 
Chemistry
How much heat is given up when 20 g of steam at 100 deg C is condensed and cooled to 20 deg.C?
asked by Mary 
geometry
Determine wether triangle deef is cogruent to triangle pqr given the coordinates of the verticles. D(6,1),E(1,4),P(0,5),Q(7,6),R(5,0)
asked by Trey 
geometry
What is the length of the hypotenuse of the right angle ABC if AB = 5 and AC = 6
asked by Carol 
English
I forgot to include the following statements. 1) Answer four out of (or just "of") the following six questions. 2) do you usually use do with the following sports activities: aerobics, athletics, karate, ballet 3) go + cycling, water rafting, paragling (?
asked by Franco 
Environmental Science
#34. In two or three welldeveloped paragraphs, name and describe the five primary air pollutants and provide several sources of each. my answer: There are five primary air pollutants and some sources of each of them. The first pollutant is Carbon monoxide
asked by y912f 
science
okay i have a question which is on a key assesed piece explain the physical and chemical changes when a candle burns using the big idea of energy? what is the big idea of energy?
asked by minka 
math
find the equation (in slope intercept form) of the line with the given slope that passes through the point with the given coordinates slope:5/8, ordered pair (0,1)
asked by jerson 
statistics
College students average 7.8 hours of sleep per night with a standard deviation of 45 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 9 hours?
asked by Anonymous 
calculus
Let A(x) be the area of the rectangle inscribed under the curve with vertices at (x,0) and (x,0), x > 0. a. Find A(1). b. What is the greatest value of A(x)? Justify your answer. c. What is the average value of A(x) on the interval 0 < x < 2?
asked by matt 
Chemistry
In order to raise the temperature of 5.0 Kg of water from 20 deg. C to 30 deg. C, a 2.0 kg iron bar is heated and then dropped into the water. What should the starting temperature of the bar be? (Specific heat Fe is 0.22 cal/gdeg.)
asked by Lexie 
Chemistry
How much heat is required to change 10 grams of ice at 0 deg. C to steam at 100 deg C?
asked by Ally 
Chemistry
How much heat is required to change 10 g of ice at 0o deg C to steam at 100 deg. C?
asked by Mari 
Physics
The typical resistance of the tungsten filament of a 60 watt incandescent light bulb when it is turned off is 24 ohms and its resistance when operating from a 120 volt power source is 240 ohms. Generally, an incandescent light bulb filament is most likely
asked by Joseph 
math
Select all that justify the following statement.3 + (y + 5) = y + 8
asked by Anonymous 
Environmental Science
#34. In two or three welldeveloped paragraphs, name and describe the five primary air pollutants and provide several sources of each. my answer: There are five primary air pollutants and some sources of each of them. The first pollutant is Carbon monoxide
asked by y912f 
Chemistry
is this statement true chemicals participating in a chemical reaction contain only potential energy?
asked by Anonymous 
math214
Describe objects that have each of the following types of symmetry. Line, Point, Plane, 90° rotational
asked by alicia 
Chem 2
Imagine that a deposit of helium gas has been discovered in Antarctica. It is being shipped to Australia in a rigid (constant volume) tank with a rated max pressure of 100 atm. If the tanks are filled to a pressure of 75 atm in Antarctica on a day when the
asked by Staci 
Chemistry
is this right when a fuel is burned some of its chemical potential energy is lost as heat. and To convert kilojoules to joules dived the number of kilojoules by 1000 joules/1 kilojoule
asked by Anonymous 
math
How many people do you need in a room in order to guarantee that there's a group of three people, each of whom has the same initials (first and last name only)?
asked by Anonymous 
just wondering
what's higher a doctoral degree or a master's?
asked by Anonymous 
Honors Chemistry
Equation: Fe2O3 + 2Al > 2Fe + Al2O3. How many grams of Fe2O3 react with excess Al to make 475g Fe? Can you show me step by step how to do it? My book says the answer is 679g Fe2O3.
asked by Anan 
works cited
I read Sparknotes No Fear Shakespeare Hamlet...how do I cite the source? Crowther, John. Ed. “No Fear Hamlet.” SparkNotes LLC? I don't know what to put on my works cited page.
asked by Anonymous 
Chemistry
Calculate the initial molarity of KNH2 and the molarities of K+, NH3, OH, and H3O+ in an aqueous solution that contains 0.75 g of KNH2 in 0.255 L of solution. You may ignore the reaction of NH3 with water. I already found the initial molarity, but I am
asked by Trixie 
chemistry
Liquid quinoline reacts according to the balanced equation. When 1200 g of C9H7N is reacted, calculate the sign and magnitude (kJ) of the heat produced. 4 C9H7N(l) + 43 O2(g) → 2 N2(g) + 36 CO2(g) + 14 H2O(l) .
asked by eng 
social studies
what are the three main types of resourses used for making,selling,and using goods and services?
asked by brian 
maths
what is a plutonis solid?
asked by Anonymous 
physics
What is responsible for earth's elliptical orbit around the sun? a. the gravitational pull of the sun b. magnetic forces both attracting and repelling other planetary bodies c. momentum caused by the earth's rotation d. balance between centripetal and
asked by sadaf 
science
whats a descriptive observation
asked by Anonymous 
physics
why helium gas absorb heat?
asked by karthika 
physics
A runner training for a race times 400 meter laps. Lap 1 60sec, Lap 2 57sec, Lap 3 55sec, Lap 4 53sec. What is the average velocity in meters per second? a. 0.563 b. 7.1 c. 14.2 d. 56.25
asked by sadaf 
Precalculus
Find dy/dx if y= (6x sqrt(x^3) (2(cubic root of x+ pie^4).
asked by Matt 
physics
in low temperature physics,at joule thomson effect hydrogen does not show cooling effect at room temperature why?
asked by karthika 
earths core
what are a few (1 or two) reasons why the core cant be of lonestones?
asked by James 
physics
in joule thomson effect,why the temperature of inversion leads to negative sign?
asked by karthika 
Math
integrate (sinx)^(5)(cosx)^(12)from 0 to (pi/2) I'm having problems just even integrating it... I tried breaking it up (sin^(2)x)^(2)(cos^(2)x)^(6)(sinx)dx then doing usub with u=cosx and du= sinx but then I get stuck... the answer is 8/3315 just don't
asked by emath 
Social Studys
Fill in the blank. 1. In 1791 congress passed a tax on Americanmade _________________ as part of a plan to help pay the federal debt.
asked by Sarah 
Economics
Why do some workers make more money than others? Must everyone make the same wage? Explain your answers using labor market equilibrium.
asked by Nickki 
Social Studys
Fill in the blank The ______________________ stated that the U.S. would not take sides with any European countries at war with one another.
asked by Sarah 
Chemistry
If 0.870 mol of liquid Br2 and 720 mL of 0.958 M aqueous NaI are reacted stoichiometrically according to the balanced equation, how many grams of solid I2 are produced? 2NaI(aq) + Br2(l) → 2NaBr(aq) + I2(s) help please. :)
asked by Keri 
Honors Chemistry
Fe2O3 + 2Al > 2Fe + Al2O3 How many grams of Fe will form when 97.6g Al2O3 form? Please & Thank you
asked by Ana 
gr. 12 chem
what is none and decane used for and why is this appropriate for each use?
asked by shelly 
Chemistry
calculate the final temperature (once the ice has melted) of a mixture made up of initially of 75.0mL liquid water at 29 degrees Celsius and 7.0 g of ice at 0.0 degrees Celsius
asked by Celine 
Spanish
Does anyone know how to say immiscible in spanish?
asked by Maria 
chemistry
see if on tlc silica if the polar solvent moves slowly then does even polar substances rf value is low? and the nonpolar rf is high?
asked by KKSAI 
cultury diversity
The United States was founded by immigrants , so why is immigration such a controversial issue now?
asked by moniquea 
Math
Explain how four red marbles can make up 1/3 of a group of marbles and three blue marbles make up 1/4 of the same group.
asked by Drew 
P. Chemistry
A student added solid K2O to a 750.0 mL volumetric flask. The solid was dissolved in water and then the flask filled with water to the mark. This formed 750.0 mL of the initial KOH solution. 20.0 mL of the initial solution was transferred to another flask
asked by Mark 
P. Chemistry
If given the Ka or Kb and pKa and pKb, how do you find the initial concentration of a weak acid/base in a solution given the pH? Is there an equation for this? I can't find anything in my notes and am not sure what to look for.
asked by Mark 
Math
What is the measure of the dent angle for a starshaped polygon with 20 points and a dent angle of 12 degrees?
asked by Donna 
5th grade math
what is the simplest form for eighteen ninethes
asked by olivia 
spainsh
what does me gusta muy tu. tu hacer me algre mean in english
asked by jon 
Calculus
Find the derivative of the given function at the indicated point. (use f'(a)=lim [f(a+h)f(a)]/h as h approaches 0) This is what I have so far: [1/(x+h)  1/2]/h = [2  (x+h)]/(h(x+h)(2)) = [2xh]/(h(x+h)(2)) ...and now I'm stuck. Help? Thx
asked by Momo 
ChEmIsTrYTHANK YOU!
Is these true or false: Every BronstedLowry acid is also a Lewis acid. Conjugate acids of weak bases produce more acidic solutions than conjugate acids of strong bases. Thank you very much!
asked by ChemistryStudent2010 
calculus
suppose that the area under the curve y=1/x from x=a to x=b is k. the area in terms of k, under the curve y=1/x from x=2a to x=2b? justify
asked by Anonymous 
Chemistry
Ho much energy is needed to change a 50 g ice cube at 0 deg C to a liquid water at 100 deg. C?
asked by Christopher 
Biology
41. HIV has become one of the most feared diseases of the world community in the last few decades. Antiviral drugs have been developed that help treat the disease, although no cure has yet been found. Many pharmaceutical approaches are being investigated
asked by mysterychicken 
Physics Electric POtential
An electric charge q creates a field of 4500 N/C at a point d away from the charge. The potential at that point is +1800V. Determine q and d. Do you have to use the formula E=kQ/r^2 or something else? I'm lost on how to solve it
asked by Hailey 
Chemistry
Determine the resulting temperature when 150 g of ice at 0 deg.C is mixed with 300 g of water at 50 deg C.
asked by Stacie 
math
4 6/9 + 3 7/12=
asked by anthony 
physics
When brakes applied to a moving car travelling at 60km/hr it decelerates at a uniform rate of 5ms2. Calculate the time taken to reach a velocity of 36km/hr
asked by bola 
Honors Chemistry
I got 206.67 g Fe, DrBob222
asked by Ana 
Business
Should illegal drugs be illegalized in the United States?
asked by Lynne 
government
Please can you help me to find out which courtroom in Wellington has panelling from the Old Bailey. I am thinking the High Court.
asked by Sam 
math
an airline passanger fell asleep halfway to her destination. When she woke up, the distance remaining was half the distance traveled while she was asleep. What portion of the trip was she asleep?
asked by sammy 
chemistry
Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent
asked by Leah 
chemistry
) Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent
asked by Leah 
Math
How to do: 4x+80=3x
asked by J.R. 
Biology
Will O2 passively diffuse and bind with hemoglobin that is less than 1mm from the surface of a blood sample? The percent of hemoglobin bound with O2 is different at high (10% CO2) and low (5% CO2) CO2 concentrations when the Po2 equals 0mmHg. Is that true?
asked by Alex 
business
should recreational drugs be legalized in the united staates?
asked by Lynne 
Physics
Mercury is poured into the open end of a Jshaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m
asked by Isabel 
Physics
Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold
asked by kat 
biology
What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface
asked by BECKY 
science
Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold
asked by kat 
chemistry
Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold
asked by kat 
Chemistry
A buffer is created by mixing equal concentrations of NH4+ and NH3. Calculate the volume of both solutions needed to create a buffer of pH=8.75 with a total volume of 100 mL.
asked by Bodhi 
CHEMISTRY
How many moles of methanoic acid you have in a 25g sample of ethanoic acid
asked by JAY 
Algebra 2
How do you simplify n^3 ÷ n^╥ (pi=╥) Answer: Please & Thank you
asked by Ana 
algebra 1
PLEASE HELP SOLVE.... 8+2>4(2))+1
asked by Lori 
History
Can you answers the Q's about a Notable American Explorer ? I need to know all about Sir Francis Drake Can you please tell me : The reason why he became an explorer Country he sailed for (if different from their country of origin please explain why) where
asked by AvatarSandS 
algebra
I need help with rewriting a relation so it is a function!!!!! for example { (1,3), (8, 7), (2,3), (1, 6), (0,0), (5,3) } I am lost and need help quick
asked by AR 
grammar
Hello. I could really use some help with my ESSAY. If anyone could tell me what they think of it and if anything needs corrected. Thanks Jess Well I guess the best place to start is the beginning. I was born in Kentucky, but only lived there for five
asked by Jess 
Social Studies
Bernstein writes that today, "debates about immigration often included the claim that 'my relatives came the legal way,' Hom's daughter, Dorothy responded that "'one's status being legal or illegal, it's two seconds apart at any point" What does Dorothy
asked by Laura 
sociology
Western companies often impose western culture on the country in which the business is launched. Locate an article that contains a similar situation as WalMart and summarize the findings. What is your analysis of the situation? How could this have been
asked by sarah 
east nobel
a certain gas has a volume of 565 mL at 25 0C and 715 mm Hg.how many moles of gas are there?
asked by eva 
Honors Chemistry
Every BronstedLowry acid is also a Lewis acid. Why is this statement false? Thanks
asked by Hello 
economics
For each of the following possible events, indicate whether the demand or supply curve for dollars would shift, the direction of the shift, the determinant of the change, the inflow or outflow effect on the balance of payments (and the specific account
asked by Babi 
gr. 12 chem
what is nonane and decane used for and why is this appropriate for each use?
asked by shelly 
MATH 4TH GRADE
WHAT IS 5% OF 600
asked by JOHN 
Economics
For each of the following possible events, indicate whether the demand or supply curve for dollars would shift, the direction of the shift, the determinant of the change, the inflow or outflow effect on the balance of payments (and the specific account
asked by Babi 
pre calc
(1/x^249)/(1/x+7)?
asked by Karissa 
science
What are some facts about metaphase?
asked by mic 
SCIENCE
Could someone give me some advice on how to tackle this question please? Explain briefly why the changes in albedo and the other factors give rise to the changes in the GMST, relating your explanation to the water cycle. Is this an example of positive or
asked by Dawn 
Physics
Two blocks are connected by a light string passing over a pulley. The inclined surfaces are frictionless, and the effects of the pulley can be ignored. The value of m1 = m2 = 1.0 kg and θ2 = 43.4 degrees. If the blocks accelerate to the right with
asked by Katie 
Chemistry
why is it important to add the nitric acidsulfuric acid mixture slowly over a 15 minute period?
asked by Kendra 
math
make an expression that equals 2 3/4 using 3 negative numbers
asked by heather 
Physics
We learned in lecture that the magnetic force on a charge q moving with velocity v in a magnetic field ~B has the form F = q~v × B One important fact about the crossproduct is that for two vectors A and B , the following is true A × B = −B × A which
asked by Jess 
HCA240 Health
Can someone explain what it means by health as organic and health as harmony???? If I can understand this I can get my homework done.
asked by Debbie 
physics
At a certain location on the Earth, the horizontal component of the Earth’s magnetic field is 2.5 ·10−5 T due North. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight so the net force on the proton
asked by Anonymous 
chemistry
A dilute sulfuric acid solution that is 3.39 molality H2SO4 has a density of 1.18 g/mL. How many moles of H2SO4 are there in 375 mL of this solution?
asked by Nick 
earth
Could you tell a story of the rock cycle using a rock called Roger the Rock??
asked by Mitch 
pre calc
Simplify (x^2+2x)/(x^2x) *I got x(x+2) for the numerator and I couldn't get the denominator, but it was wrong help please
asked by Karissa 
geography
what are some tricks that will; help me remember the stats and the capitles
asked by briana 
Algebra
I know when solving inequalities the sign changes when you multiply or divide by a negative number, my question is does this happen in equations as well?
asked by Michelle 
Honors Chemistry
How does heating or boiling a substance affect its pH?
asked by Emily 
english
What is the difference of "there" "they're" and "their"?
asked by Jenny 
geometry
How do you construct a quadrilateral with two pairs of parallel sides of length 4 cm and 6 cm and one pair of opposite angles each measuring 123 degrees
asked by MIcky 
science
was their any changes to the ocean since 10 million years ago?
asked by james 
pre calc
Express the function f(x)=1/(x2)in the form g of h if h(x)=x2. Find the function g(x). g(x)=?
asked by Karissa 
math
A multiple choice answers for the question. What is the measure of the dent angle for a starshaped polygon with 20 points and a dent angle of 12 degrees? Asnwers are; 30 degrees, 50 degrees, 60 degrees, 90 degrees. How do I find the answer?
asked by Donna 
Science
wht's needed 4 nuclear fusion to start? all the 8 protons of energy?
asked by Sara 
math
4b8=8
asked by michelle 
English
Can you tell me which of the following statements are correct? Thank you very much. 1) For my main course I'd like grilled chicken breast (and not a grilled chickne breast) with boiled potatoes and peas. 2)For my starter I'll have a soup of the day and for
asked by Franco 
Chemistry
Which measuring device would you use if you needed to know the volume of a liquid very precisely?Why?
asked by pasely 
physics
A single conservative force acts on a 5.00 kg particle. The equation Fx = (2x + 4) N describes this force, where x is in meters. As the particle moves along the x axis from x = 1.40 m to x = 7.00 m, calculate the following.
asked by gina 
pre algabra
4(3x+5y+5)+7(5x+2y1)
asked by melissa 
physics
Two loudspeakers in a 20°C room emit 629 Hz sound waves along the xaxis. (a) If the speakers are in phase, what is the smallest distance between the speakers for which the interference of the sound waves is destructive? (b) If the speakers are out of
asked by anonymous 
weather system
Which weather system is bigger, a hurricane or an extratropicalcyclone?
asked by Sara 
Science
wht's needed 4 nuclear fusion to start? Hydrogen nuclie fuse?
asked by Sara 
Environmental Science
#33. In two or three welldeveloped paragraphs, explain how water is treated so that it can be used for safe drinking water. Include definitions of the terms potable and pathogens. my answer: There are many steps to how water is treated so that it can be
asked by y912f 
Precal
1) Solve the equation sinx(sinx+1) = 0 I am having trouble with the first step. Could I do sin x^2 + 1 =0?
asked by Abby 
microeconomics
A monopolistically competitive industry has the following structual characteristics:(1) a large number of firms,(2) no barriers to entry, and (3)product differentiation, relatively good substitutes for a monopolistic competitors products are available.
asked by ronie 
English
Can you please tell me if the following words are still used in English and if not, what shall I use instead? Baker's, butcher's, chemist's, newsagent's, tabacconist's, optician's, fishmonger's, shoe shop, shoe repairer, bookshop, jewellery shop, dairy,
asked by Franco 
2nd grade
how do I count the vertices of a rectangle
asked by kim 
EnglishMs. Sue
I have to make a list of male characters from action movies, t.v., and video games that I have see recently. Does this mean write their names? I also have to write a bunch of other traits that men are shown to have. This is what i have so far: *brave
asked by Sara 
Anatomy
Explain why a surgeon would use subq sutures duing abdominal surgery, but not during an open reduction and internal fixation of a fractured radius
asked by Colleen 
college algebra
By setting up and solving a proportion involving x, find the value of x for the car that you have chosen. State the type of car, the mileage, and show both the set up of the proportion and the steps to solve. Include units with your answer. How would I do
asked by Stephanie 
earth
the area around the great lakes was once covered by thick sheets of ice. Use the principal of isostasy to explain how the melting of these ice sheets has effected the land around the lakes?
asked by matt 
physics
1.The earth is constantly bombarded by cosmic rays, which are charged particles from outer space. moving vertically Find the force on one such cosmic ray− a proton that is instantaneously downward at 5.04 107 m/s at a point outside the atmosphere over
asked by Sandhya 
6th grade
what is the zapatista revolution
asked by admir 
College Accounting
The following questions contain numbers and you have to do different things with the number in each question. I'm not sure of the steps to take to figure out each answer. And, when I try to do what the book shows me I come up with wrong answers. So if you
asked by Abbyy 
calculus
consider the function f(x) = e^x(sinNx) on the interval [0,1] where N is a positive integer. a) Compute the integral from 0 to 1 of f(x). Evaluate this integral when N=5, N=10, and N=100. B) What happens to the graph and to the value of the integral as
asked by anonymous 
brother:mother::fly:
This isn't a question but those of you who are having troubles with brother:mother::fly: the answer is spry. It's a word but I didn't know it was a word until my parents gave me the answer LOL but this was a very handy site considering the fact I had the
asked by Rachel 
fraction writing to explain
a park has 4 hiking trails. trails A and B go from the lodge to the dock. trail A is 1/2 mile long, and trail B is 2/3 mile long. trails C and D go from the dock to the park entrance. Trail C is 1/4 mile long, and trail D is 1/3 mile long. Draw a picture
asked by Nathan 
GeometryPLEASE CHECK ANSWERS!
In isosceles triangle DEF, DE=DF. Which of the following is true? 1)
asked by Laurie 
Economics
what does the positive slope of a line with Government expenditure (G) represent when Y=Total expenditure is on the x axis. For simplification, in the equation G=a+tY, where a and t are constants, what does t represent?
asked by Salman 
BIS/219 Business Information Systems
What is the relationship of Information resources to the business user? Provide at least one example. Can somebody please explain this to me in English?
asked by unsure 
Biology
37. Hyphae a. increase the surface areatovolume ratio of the fungus b. have slender filaments c. allow for efficient uptake of nutrients d. all of the above D? 38. In which process do tRNA molecules attach amino acids to the growing chain according to
asked by mysterychicken 
math
find the volume of a solid that has 3 by 3 ft 3ft high and 7ft by 5ft long
asked by billy 
writing
Can you help me correct these sentences? 1.She wants to become an environmental scientist she is especially interested in marine life. 2.If she can get a scholarship she would like to spend her senior year in New Zealand. 3.The Great Coral Reef almost
asked by ruby 
Chemistry
A gas occupies a volume of 140 mL at 35 degrees celcius and 97 kPa. What is the volume of the gas at STP? Please show the work.
asked by Maria 
Biology
41. HIV has become one of the most feared diseases of the world community in the last few decades. Antiviral drugs have been developed that help treat the disease, although no cure has yet been found. Many pharmaceutical approaches are being investigated
asked by mysterychicken 
Chemistry
A gas storage tank has a volume of 3.5*10^5 m^3 when the temperature is 27 degrees celcius and the pressure is 101 kPa. What is the new volume of the tank if the temperature drops to 10 degrees celcius and the pressure drops to 95 kPa?
asked by Alexandra 
Global History
How does the English government's attitude toward the Irish during the Irish famine in the late 1840's reflect the motivations for imperialism?
asked by Chris 
Chemistry
You are given a jar containing a mixture of three different solid substances. The particles of each substance are larger than 0.5 cm in diameter. All you know about the substances is that each is a pure metal. Describe a method for determining the
asked by Haley 
Algebra
If you replace the equal sign of an equation with an inequality sign, is there ever a time when the same value will be a solution to both the equation and the inequality?
asked by Michelle 
Physics
Which statement about the electric dipole moment is true? u=qd a) A molecule is a strong dipole if the net charge separation occurs over a short distsnce within the molecule b) the unit of u is C/m c)A dipole exerts a larger force on a point charge than on
asked by Alexa 
Physics
I am also not 100% sure about the following question... a dipole and a point charge at close proximity a)always repel each other b)always attract each other c) never interact electrically d) attract or repel eachother based on the location of the point
asked by Alexa 
math
write each number as a power of 2 1.1/8 2.square root of 2 3.3 to the square root of 4 3(4 how do you do it???
asked by alyssa. 
Management Accounting
The Minnetonka Corporation, which produces and sells to wholesalers a highly successful line of water skis, has decided to diversify to stabilize sales throughout the year. The company is considering the production of crosscountry skis. After considerable
asked by Anonymous 
math
what's 7 x 3
asked by mrDumb 
Physics
A commercial resistor can safely dissipate power only up to a certain rated value. Beyond this value, the resistor becomes excessively hot and often cracks apart. The resistor used in this experiment was rated by the manufacturer to be a 2 watt resistor.
asked by San 
Physics
The nominal resistance R of the resistor used in this experiment was printed on the resistor by the manufacturer. According to the manufacturer, the actual resistance of the resistor should not differ from its nominal value by more than 1%. Does your most
asked by Joseph 
Math 116 algebra
Imagine you want to add a sprinkler system and the location of one section of the sprinkler line can be described by the equation y=1/2x4 Complete the table for this equation. x y (x,y) 1 2 4 2 8
asked by Karine 
math
i am thinking of a number between 20 and 50. it is an even number. it has exactly 9 factors. what is the number?
asked by karen 
Chemistry
How mucyh heat is given up when 20 g of steam at 100 deg C is condensensed and cooled to 20 deg. C?
asked by Ally 
calc
Let f be the function defined by f(x) = (x 2 + 1)e x for 4 < x < 4. a. For what value of x does f reach its absolute maximum? Justify your answer. b. Find the xcoordinates of all points of inflection of f. Justify your answer.
asked by john 
MATH
Simplify  –5 – –3 – 3
asked by hannah 
spanish
it is a crossword puzzle 4 letters and it says Dan is a _ _ _ _ name need it in english and spanish
asked by devi 
math
Rewrite the expression in the simplest form without parentheses: 6(18 – y)
asked by hannah 
Physics
A mobile postive point charge is located between two parallel charged plates of charge densitys +o (top plate) and o (bottom plate) at a distance d from the negative plate.the distance doubles (becomes 2d)between the negative (bottom) plate and the mobile
asked by Michael 
p.e
how to jump rope
asked by bigears 
EnglishMs. Sue
So for my second paragraph how would I start it off? Describe not just how a man looks like, but what he values, and how he behaves. This time am I not describing a man from my point of view? Am I describing a man like, a man can be abusive, or nice, etc.
asked by Sara 
History
What is trace the path that they took from New York to Salt Lake City ?
asked by Michaela 
math
1+1
asked by katie 
History
What is account of the famous siege of the Alamo ?
asked by Michaela 
Environmental Science
#33. In two or three welldeveloped paragraphs, explain how water is treated so that it can be used for safe drinking water. Include definitions of the terms potable and pathogens. my answer: There are many steps to how water is treated so that it can be
asked by y912f 
chemistry
Diacetyl, a substance contributing to the characteristic flavor and aroma of butter, consists of 55.8% C, 7.03% H, and 37.17% O. In the gaseous state at 100 degrees celsius and 747 torr, a 0.30 gram sample occupies a volume of 111 ml. What is the molecular
asked by Bob 
10th grade
What were the complications of decrees in the Ottoman Empire during the Age of Nation States?
asked by Sam 
chemistry
the heat of fusion for thallium is 21 J/g, and its heat of vaporization is 795 J/g. Thallium's melting point is 304 degrees celsius, and its boiling point is 1457 degrees celsius. The specific heat of liquid thallium is 0.13 J/g degrees celsius. How much
asked by billy 
10th grade
What were the effects of the Balkan Wars that led to the Revolution during the Age of Nation States? (OTTOMAN EMPIRE)
asked by Sam 
physics
An eardrum can burst when the pressure exceeds one atmosphere and the pressure inside the ear fails to equalize. Determine the depth in seawater when this pressure would be reached. (pressure of ocean = 1.03*10^3 kg/m^3)
asked by Alex 
calculus
xy+y^2=1 find d^2/dx^2 at (0,1)
asked by vic 
10th grade
The volume of a small sphere is 36 pie cm cubed. The volume of a large sphere is 288 cm cubed and its radius is 6 cm. What is the similarity ratio of the radii of the two spheres? What is the measurement of the small sphere's radius?
asked by renee 
Business Ethics
Why does N. Scott Arnold think that even voluntary preferential treatment programs are wrong?
asked by Charlene 
Chemistry
A technician requires a 4L of an ammonia solution to have a pH of 11.55. What volume in liters, of ammonia gas at 25 degrees Celsius and 1 atm is necessary to achieve this result?
asked by John Gold 
math214
If possible, describe a geometric figure that can be transformed into itself by each of the following: Reflection, Rotation, Translation, Glide Reflection
asked by alicia 
physics
A doubleslit interference pattern is created by two narrow slits spaced 0.21 mm apart. The distance between the first and the fifth minimum on a screen 55 cm behind the slits is 6 mm. What is the wavelength of the light used in this experiment? Having
asked by deb 
Algebra1
Hello, need help with this question: Find the product. (7m2n)(9mn3) For my answer i put 63m^3n^4 and I got it wrong, the computer online doesn't recongnize the carrot and we were told for the carrot you have to replace it and now I am lost.
asked by Denise 
algebra
Need help showing me the steps without using the carrot function: Find the product. (2y + 2z)(2y  3z)
asked by colin 
Health
You wake up one morning with a headache, body aches, and a fever. You think you might be coming down with something. Analyze the relationship between healthful behaviours you can practice and the ways that communicable diseases are spread. What should you
asked by April 
Social Studies
What kinds of conflicts have caused problems in coombia?
asked by Anonymous 
math
The candy shack has 20 pounds of mixed white and dark chocolates worth $7.50 per pound. white chocolates alone sell for $8.00 per pound and dark chocolates sell for $6.00 per pund?
asked by Rj Garcia 
bio
how do you think the development of vaccines for more than 20 communicable diseases has affected the average human life span in areas where these vaccines are available?
asked by melita 
english
would you say pittance or meagre is the best word to use.
asked by Janey 
Chemistry
if the temperature of a 500.0g sample of liquid water is raised to 2.00c how much heat is absorbed by the water? The specific heat of liquid water is 4.184J/(g*c)
asked by Anonymous 
spanish
in reference to the last question it has to be a four letter word with the 2nd letter being a (o) I am not sure but otherwise the other question across from it said my stomach after a spaghetti dinner and that is a 5 letter word where it runs into the last
asked by devi 
Social Stuies
What is resource to "the Old 300?"
asked by Melea 
chemistry
which is the only noble gas listed that is stable at 0 degrees celsius?
asked by ryan 
History
Why the idea of manifest destiny may have been so attractive during the 1840s?
asked by Melea 
5th grade
A KIND OF ROCK
asked by LILLY 
science
Can poor nutrition early in life be mitigated to allow for healthy physical growth and development later
asked by tonya 
geography
what is china's culture? please give examplesa Thank you!
asked by ben 
math
i am having a minor difficulty i've been stuck for over an hour and don't know what to do i don't know is this right ? = "+" or "" # = number y=x (x+1)squared + (y+1)squared = 6 i substitute y (x+1)squared + (x+1)squared = 6 x squared + 2x + 1 + x squared
asked by larry 
math (please check my work)
find the equation (in slope intercept form) the line passing through the points with the given coordinate (1,1) (3,3) 3(1)/3(1)=2 y+3=2(x(3) y+3=2x6 3 3 y=2x9 is what i got is this correct?
asked by jerson 
History
What is territorial growth of United States during this period ?
asked by Michaela 
literary
I need to make a timeline chart for the oedipus trilogy .any ideas
asked by juanita 
literacy
From the book (The Van Gogh cafe) by Cynthia Rylant: Why is Clara afraid to mention the pies to her father?
asked by Anonymous 
calculus
What would be the force required to push a 100 lb. object along a ramp that is inclined 10 degrees with the horizontal?
asked by Ken 
calculus
consider the function f(x) = e^x(sinNx) on the interval [0,1] where N is a positive integer. a) Compute the integral from 0 to 1 of f(x). Evaluate this integral when N=5, N=10, and N=100. B) What happens to the graph and to the value of the integral as
asked by Lindsay 
social studies
provision fom the virgina plan
asked by Anonymous 
Honors Chemistry
If 20 mL of 0.01 M aqueous HCl is required to neutralize 30 mL of an aqueous solution of NaOH, determine the molarity of the NaOH solution. ==> I got 0.01 M NaOH as my answer. Is this correct?
asked by Emily 
bobpursley: math cont
find the equation (in slope intercept form) the line passing through the points with the given coordinate (1,1) (3,3) ok slope 1 y+3=1(x(3) y+3=1x3 3 3 y=x6.. correct?
asked by jerson 
hmm...?
what is clinical psychology?
asked by Anonymous 
gr.12 chem
what is The relationship between the number of carbon atoms and the boiling points of the alkanes?
asked by shelly 
5th grade
can you explain to me how to add and subtract fractions like 2/5 + 5/12 or 7/12  8/9? i'm having trouble on this and i'm always forgetting how to do it.
asked by brianna 
psychology
i need to find a website that i can down load a copy of an adult psychologial treatment form...where can i find one????
asked by barb 
math
a store clerk has 600 pens in stock . he then issues 1/4 to a store . then issues another 1/6 to another store and 3/8 to the last store how much is still in stock?
asked by will 
math
graph y=x2,y=2x2 and y=1/2x2 on the same
asked by isabel 
Chemistry
A dilute sulfuric acid solution that is 3.39 m H2SO4 has a density of 1.18 g/mL. How many moles of H2SO4 are there in 375 mL of this solution? 3.39 is 3.39 Molality not molarity
asked by Nick 
reading
I was just curious, we're starting to read The Wave by Todd Strasser, and I was wondering if anyone has read it and if they have any comments on itgood or bad? I just kinda wanna get an idea of how good or bad it is and what to expect. Thanks! ~aShLeY
asked by Ashley 
Algebra 2
Find the LCD of 5/18x^2y^3,3/24x^4y^5
asked by Gina 
writing about technology
Can anyone give me a website where I can find facts about the GPS or the compass???????????? PLEASE!!!!
asked by sierra (6th grade) 
biology honors
Summarize Griffith's transformation experiments
asked by kelly 
history
The Progressive Movement has been characterized as a movement that brought a sense of justice and morality to the American political scene between 1890 and 1917. Other historians say that although wellintentioned, in the end they failed to achieve their
asked by smeffy 
Earth Science
If the continental crust were thinner than its average thickness of 40 km, would it depress the mantle more or less than it does now? Explain.
asked by Matt 
biology
1) RNA condons and amino acids: valine, proline, alanine a. GCGCGUGUG b. GUGCCUGCG c. GUUCCCACU d. GCUCUUGCU
asked by Toni 
Chemistry
in this experiment you are you will begin by preparing a dilute soultion of sodium hydroxide by taking 50 ml of 3 M NaOh stock solution and diluting it with 250 ml of water. i found that and the answer was .5 but how do i do this b. calculate the number of
asked by Chris 
spanish
how do you write 25,000 and 432 in spanish?
asked by Anonymous 
Precalculus
Ok u have to put X^38 divided over X^2(X1)^3 Into a partial fraction I need help please
asked by Sinya 
nutrition
Pregnancy obviously results in an increased need for vitamins and minerals. Deficiency or excess of any of a number of nutrients can lead to birth defects and/or complications during pregnancy
asked by nancy 
physics
A doubleslit interference pattern is created by two narrow slits spaced 0.21 mm apart. The distance between the first and the fifth minimum on a screen 55 cm behind the slits is 6 mm. What is the wavelength of the light used in this experiment? Having
asked by deb 
Chemistry
Do you need to do uncertainties on percent error? It doesn't make sense to have "percent error on percent error".
asked by Stuck 
Chemistry
In order to raise the temperature of 5.0 Kg of water from 20 degrees C to 30 degrees C,m a 2.0 Kg iron bar is heated and then dropped into the water. what should the starting temperature of the bar be? (specific heat of Fe = 0.11 cal/gdeg.)
asked by Mary 
English
Hi, my teacher edited my paper and she said I need to pick a different transitional word rather than "next" or "then". Any suggestions?
asked by Anonymous 
chemistry
2. Bromine can be added to limonene to create a brominated compound. The balanced equation is shown below. When 613 mg of limonene and 3.5 mL of a 10% (v/v) solution of Br2 in dichloromethane (a solvent) are combined, 959 mg of the product is isolated.
asked by Grace 
Chemistry
How much energy is needed to melt a 30.5 g ice cube?
asked by Christopher 
english
We met at Nick's house before going out to eat. Proper Noun=Nick's Common noun=house Byron Elementay School has a day off tomorrow. Proper noun= Bryon Elementary School Common noun=tomorrow They studied the pictures of Venus. Proper Noun=Venus Common
asked by Christopher 
Honors Chemistry
I don't exactly understand this question  can someone maybe explain it to me please? 6) Suppose you have an NaOH solution of unknown concentration. Name three possible substances that could be used in "known" solutions to titrate the NaOH solutions.
asked by Emily 
chemisty
How much energy is needed to melt a 30.5 g ice cube?
asked by Christopher 
Geometry / Math
Is a rectangular prism a polyhedron Thanks
asked by Anonymous