Questions Asked on
October 13, 2012

Physic
A dam is used to block the passage of a river and to generate electricity. Approximately 58.4 x 103 kg of water falls each second through a height of 20.1 m. If one half of the gravitational potential energy of the water were converted to electrical
asked by Monet Nguyen 
chem
net ionic equation. Aqueous acetic acid (HC2H3O2) is neutralized by aqueous barium hydroxide. i got H^+(g) + OH^(g) > H_2O(l) but it is wrong. are my states of matter wrong?
asked by rebekah 
chemistry
What is the mass of 4.80 moles of MgCl2?My answer is: Mg=24.3 g/mole Cl2=35.5g/mole*2=71g/mole so, Mg 24.3+ Cl2 71= 95.3g/mole therefore 4.80 moles * 95.3 g/mole=471.84g Am i right pls correct me if i'm wrong thanks
asked by chemdummy 
math
One side of a right triangle is known to be 45 cm long and the opposite angle is measured as 30°, with a possible error of ±1°. (a) Use differentials to estimate the error in computing the length of the hypotenuse. (Round your answer to two decimal
asked by Ansley 
Calculus
A metal cylindrical container with an open top is to hold 1 cubic foot. If there is no waste in construction, find the dimensions which will require the least amount of material.
asked by Elizabeth 
physics 100
Bob, who has a mass of 60 , can throw a 800 rock with a speed of 26 . The distance through which his hand moves as he accelerates the rock forward from rest until he releases it is 1.0 . a) What constant force must Bob exert on the rock to throw it with
asked by Bob 
yetf8edfueidcyt87e
a farmer wishes to fence off a rectangular field with 1,000 feet of fencing.if the long side of the field is along a stream, express the area of the field as a function of its width
asked by lara 
chemistry
Aluminum metal is exposed to atmospheric oxygen, it is oxidized to form aluminum oxide. How much heat is released by the complete oxidation of 24.2 grams of aluminium at 25°C and 1atm.
asked by Diana 
chemistry
Which will make you more wealthy, one mole of pennies (6.02e23 pennies) or one mole of gold atoms (6.02e23 atoms)?
asked by Candy 
physics
Sally applies a total force of 71 N with a rope to drag a wooden crate of mass 100 kg across a floor with a constant acceleration in the x direction of a = 0.1 m/s2. The rope tied to the crate is pulled at an angle of = 50 relative to the floor.
asked by Jacob 
chemistry
calculate the molarity of an acetic acid solution if 25.00mL of the solution required 35.25mL of 0.1200M NaOH for neutralization.
asked by Anonymous 
math
an isosceles triangle is such that the vertical angle is four times the size of a base angle.what is the size of a base angle
asked by ja'afar 
chemistry
how many moles of Nitrogen are in 80g of N2O?
asked by Eddie 
chemistry
in an experiment, 2.50g of salicylic acid is reacted with 10.31g of methanol. the yield of methyl salicylate, C8H8O3, is 1.27g. what is the percentage yield?
asked by robert 
Algebra 2
The excursion boat on the river takes 2½ hours to make the trip to a point 12 miles upstream and to return. If the rate at which the boat travels in still water is 5 times the rate of the river current, what is the rate of the current? Which of the
asked by Casey 
chemistry
what is the balanced molecular formula and state for this equation Mg+Cr(C2H3O2)3=
asked by Lornie 
PHYSICS
A bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel and observes that drops of water fly off tangentially. She measures the heights reached by drops moving vertically (see figure). A drop that breaks loose
asked by Tammy 
physics
A circular plate of uniform thickness has a diameter of 56cm.A circular portion of diameter 42cm is removed from one edge of the plate .find the position of the center of mass of the remaining portion.
asked by sony 
physical
Oasis B is a distance d = 8.0 km east of oasis A, along the x axis shown in the figure. A confused camel, intending to walk directly from A to B instead walks a distance W1 = 21 km west of due south by angle θ1 = 15.0°. It then walks a distance W2 = 30
asked by Anonymous 
Chemistry
At constant temperature, a sample of 3.0L of Argon gas at 2.0 atm is compressed until the new pressure is 3.524 atm. What is the new volume?
asked by Stacy 
business
You want to have $6 million in real dollars in an account when you retire in 40 years. The nominal return on your investment is 13 percent and the inflation rate is 5.1 percent. What real amount must you deposit each year to achieve your goal?
asked by nicky 
sciencephysics
A machine gun of mass 10 kg fires 20g bullets at the rate of 10 bullets per second, with the speed of 500 m/s. What is the force necessary to hold the gun in position?
asked by lalitha 
Science Chemistry
A test tube containing a mixture of compounds X, Y, and a small amount of Z weighs 25.4886 g. The tube is emptied into a beaker and the empty tube is reweighed, giving a value of 10.2586 g. The mixture is separated into two components by dissolving in
asked by Sonia 
physics
1) Mass m1 = 0.7 kg moves with constant velocity v1i = 2.0 m/s along the xaxis and collides with mass m2 = 1.8 kg, which moves with velocity v2i = 3.4 m/s, as sketched below. After the collision, m1 and m2 stick together. Find the angle, θ, between the
asked by Jim 
chem
Could donuts be quantified in terms of mass instead of number? explain.?
asked by Anonymous 
Math
A right triangle is formed in the first quadrant by the x and yaxes and a line through the point (3,2). write the length L of hypotenuse as a function of x.
asked by Solta 
math
Find the area of the triangle whose vertices are (2,3),(3,4),(2,4).
asked by vishal 
business
You want to have $6 million in real dollars in an account when you retire in 40 years. The nominal return on your investment is 13 percent and the inflation rate is 5.1 percent. What real amount must you deposit each year to achieve your goal?
asked by nicky 
english
5. Identify which of the two sentences below contains a verb agreement error. Then, explain how to correct the problem. a. Among the guests was a private detective. b. Neither of those mattresses feel comfortable
asked by cathy 
chemistry
if 16.o ml HCL is needed to neutralize from a 2.25g sample of organic material, calculate the mass percentage of N in the sample
asked by allison 
Algebra 1
oops for my last question i meant rectangle
asked by Karen 
Anntarctic
What is the Antarctic Treaty System?
asked by rawr... im a dinosaur.... rawr 
physics
Two identical balls are moving at the same speed of 3 m/s toward each other. With no external forces acting, what would be the magnitude (value) of the total momentum of the two balls after collision? (Express your answer as a number, not in words)
asked by Anonymous 
Math
Colin's back yard is 720ft.In his estimation, the fallen leaves that covered his backyard is 2/3 of his yard. (Answer:480ft right) Colin measured the volume of fallen leaves in a 1ft by 1ft section of his back yard to be 432 in3. If leaves fell uniformly
asked by Shiny 
Physics
When races are timed manually, timers start their watches when they see the smoke from the starting gun rather than when they hear the gun. How much error is introduced in timing a 100m race if the watch is started on the sound rather than on the smoke
asked by AOA 
Math
How do you solve this equation; There are 128 7th graders at Mark's school, if there are 16 more girls than boys, how many 7th grade boys are there?
asked by Bill 
Math.. how to get linear function
The total length y is a linear function of the tail length x with great accuracy. The domain is the interval from 30mm to 200mm, and the range is the interval from 200mm to 1400 mm. The following two points are given: X0= 60mm, Y0= 455mm, X1=140mm, Y1=
asked by Jack 
Physics
When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. Eventually, the spacecraft reaches a point where the Moon's gravitational attraction overcomes the Earth's gravity. How far
asked by Sam 
Algebra
A scuba diver dives 100 feet below the waters surface. Later she rises 78 feet. How far below the surface is the diver?
asked by Tyler 
art
hundert wasser
asked by nina 
PHYSICS
An object with a mass of 14kg lies on a frictionless incline. A rope attached to the mass runs parallel to the incline and is connected to a wall at the top of the incline. If the rope is considered to be in static equilibrium what is the tension of the
asked by MOLLY 
math surface and volume
If volume increases by 60%, how much does the surface increase by? Please show work.
asked by kate 
criminal Justice
Select a city, town, or municipality and examinends trends in criminal activity over the last 3 yearse
asked by Kiera Harps 
Business Finance
If fixed costs are $20,000,000, variable cost per inpatient day are $450, average length of stay is 3.3 days, and volume is 8,000, what revenue per patient day must the hospital make in order to make a profit of $500,000?
asked by Lola 
Physics
A 345N load is suspended from a cable. What is the acceleration of the load if the tension in the cable is 275N£¿
asked by Richard 
newton's law
Find the acceleration and tension in an Atwood's machine. Two different masses connected by a string over a pulley which is at rest.
asked by jack 
Math
Find the parabola with equation y = ax^2 + bxwhose tangent line at (2, 12) has the equation y = 14x − 16
asked by Anonymous 
math
square root of 64
asked by jr 
physical science
A 0.50 kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 8.0 N for a distance of 7.5 m. What is the velocity of the block in m/s?
asked by Anonymous 
Math
At what point on the curve y = 6 + 2e^x − 3x is the tangent line parallel to the line 3x − y = 1?
asked by Anonymous 
Chemistry
A bowl of 471 g of water is placed in a microwave oven that puts out 591 watts (J/s). How long would it take in seconds to increase the temperature of the water from 12.0oC to 53.3oC? Use SF. I'm not really sure how to do this, so any help would be
asked by Anonymous 
precal
find the intercepts of y=2x4
asked by ladybug 
precal
find the center (h,k) and radius r of the circle and then find the intercepts, if any. 5x^2+30x+5y^2=0
asked by ladybug 
Math..solve for u
Solve u2[2=3 [ is square root. Please show work
asked by jasmin 
math..solve for u again.
u2√2=3. please show work
asked by jasmin 
EnglishSEC Football
What would be 3 good subpoints for this mainpoint National Championship Records/Bowl Records?
asked by Yesi 
random math queastion
√x^2+2 Is this possible as is?
asked by Angela 
math
what is the property of 3455 multiplied by 1 = 3455
asked by Anonymous 
physics
1) Mass m1 = 0.7 kg moves with constant velocity v1i = 2.0 m/s along the xaxis and collides with mass m2 = 1.8 kg, which moves with velocity v2i = 3.4 m/s, as sketched below. After the collision, m1 and m2 stick together. Find the angle, θ, between the
asked by Jim 
newton's law
A block of mass M is projected up a frictionless inclined plane with a speed VO. The angle of incline is given as theta. a. How far up the plane does it go? b. How much time does it take to get there? I was stuck after Fg(cos(theta+90)= Ma_x
asked by jack 
Driving
Hey i begin to drive and can someone please tell me about parking break. Before I back out of driveway, do I shift gears first, or parking break first and then gears? And what about when I pulling into driveway and going to park, do I do gear first or
asked by Mohammad 
precal
find the equation of a line that is perpendicular to the line y=1/6x+7 and contains the point (5,0) y= (Type your answer in slope intercept form)
asked by ladybug 
Math
u2√u=3. what is u?
asked by Kyle 
grammar
"He kicks his feet in the water." What are the nouns
asked by Anonymous 
math
define a variable and write an equality for each situation the maximum speed allowed on main st is 25 miles per hour a trainer advises an athlete to keep rate under 140 beats per minute
asked by anonymous 
math
4(3) squared do u times 4 by 3 and then square it or 1st square 3 then multiply the answer by 4
asked by anonymous 
math. solve for t
1/1024=42*0.5^(t/12.5) Solve for t. Please show work. Much appreciated!
asked by Kyle 
Chemistry
What is the maximum mass of S8 that can be produced by combining 80.0 grams of each reactant? 8SO2 + 16H2S > 3S2 + 16H2O
asked by Afitz 
Math. Have answer, please show work
In a tracer method the potassium isotope 42K is used for labelling. The half life of 42K is 12.5 hours. If No is original number of atoms, how many hours will it take until only (1/1024) No Atoms remain? The answer is 125 hours but I do not know how to get
asked by Kyle 
Physics
A football player throws a ball with a horizontal distance of 31.0 m so that the other player catches it at the exact height it was initially thrown. If the ball rises and falls by 1.8 m in its trajectory, what is the initial velocity of the ball? Please
asked by Darrell 
Computing Essentials
What is considered a line of sight communication medium?
asked by Rane 
chemistry
molecular weight is 284.5 g/mol what is the molecular formula.76.0% C, 12.8% H, 11,2%O.
asked by Lornie 
AP Physics
A frictionless plane is 13.1 m long and inclined at 39.8 deg;. A sled starts at the bottom with an initial speed of 4.99 m/s up the incline. When the sled reaches the point at which it momentarily stops, a second sled is released from the top of the
asked by Elise Brown 
algebra
For the statement that says: b + (a) = b  a What property would that be? Is it the addition property of equality? or something else.
asked by Josie 
Math 8R  help!!!!!!!
Combining Like Terms 1. 3a + a = 16 2. 9x  3x = 30 3. 5w + 3w = 24 I really need help with this, can you at least do one or two for me so I can do the other problem.
asked by Laruen 
precal
for the given functions f & g find the specified value of the following functions and state the domain of each one. f(x)=2+6/x; (g)x 6/x a. (fg)(3)= what is the domain of fg? b. (f/g)(6)= what si the domain of f/g?
asked by ladybug 
math
i need help in math can someone help me
asked by cecilia 
Math
How do you graph the line y = 3x + 2.
asked by Linda 
City College
Galileo is riding on top of a horse that is gallop ing at 11 ft/s due east. A minute into his ride, Galileo pulls a key out of his pocket, and holds it over the side of the horse. When he lets go, the key falls 3.0 ft vertically to the ground. a). How far
asked by Amy 
World History
Name three of the German tribes that attacked Rome's western frontiers.
asked by Losa 
math
calculate the angles of an isosceles triangle in which each base angle in four times the vertical angle
asked by umar 
chemistry
Which one is greater in terms of number of atoms Na or S. Which one is greater in terms of mass, a mole of Na atoms or a mole of S atoms.
asked by troy 
Statistics (Math)
A government report looked at the amount borrowed for college by students who graduated in 2000 and had taken out student loans. The mean amount was = $ 17 , 776 and the standard deviation was s = $12,034. The quartiles were Q 1 = $9900, M = $15,532, and Q
asked by karen 
Science
How can community growth affect local ecosystems?
asked by Jen 
Math
Which Statements of congruence are true and which are false and why? 177 _= 17 871 _= 713 1322 _= 5294 5141 _= 8353 13944 _= 8919 67 x 73 _= 1 x 3 17 x 18 x 19 x 20 _= 4! 83 (144 power) _= 15 (144 power) Their not equals signs...they are three lines on top
asked by Annie 
chemistry
A 500 mL sample of solution of H2SO4 was titrated with 60 mL of 1.5 M KOH. What was the molarity of the H2SO4 sample?
asked by Lisa Davies 
Foreign languages
How do you write in the Fiji language? Hello dear, how was your day?
asked by Sharon 
accounting
imageshack.us/a/img404/2843/img00129201210132042.jpg if over 600 units, fixed costs goes up 20% how do i get each blank?
asked by rooooo 
Math
How many integers bewteen 200 and 500 inclusive leave a remainder 1 when divided by 7 and a remainder 3 when divided by 4? Find the smallest positive integer that leaves a remainder 5 when divided by 7, a remainder 6 when divided by 11, and a remainder 4
asked by Annie 
market
Target marketing, in contrast to mass marketing,
asked by Anonymous 
Math. Increases
The worlds pop in 1970 is estimated to be 3.7*10^9. The yearly growth rate is approximately 2%. How large would the world's pop be in 1980? Please show work. Thanks :)
asked by Casey 
Physic
I am confuse about this one question can some one please help me. The Navy wants a new airplane launcher for their aircraft carriers and you are on the design team. The launcher is effectively a large spring that pushes the plane for the first 3.49 meters
asked by Janki Patel 
sociology
In "Some Moral Minima," Lenn Goodman argues that there are certain things that are simply wrong. Do you think Goodman is right? Using specific examples, explore the challenges Goodman presents to relativism. Determine whether you think there are such
asked by stefany 
english
sara and saira's grandfather correct the sentence
asked by Anonymous 
Math. Increases again
The worlds pop in 1970 is estimated to be 3.7*10^9. The yearly growth rate is approximately 2%. How large would the world's pop be in 1980? Would i use log functions? please help.
asked by Casey 
finance
You have been given the following information on a project: It has a 3year lifetime The initial investment in the project will be $28 million, and the investment will be depreciated straight line, down to a salvage value of $6 million at the end of the
asked by j 
math
There are three pieces of rope with the lengths 15 1/3feet, 20 1/2 feet, and 30 3/4 feet. A) how many yards in all? B) If thery were all cut into 3 feet pieces how many would you get and how did you determine this answer C) How much rope is left? How was
asked by b6 
Math
On his 13th birthday he was 112 cm tall and on his 14th birthday he was 121cm tall. Assume a geometric monthly growth rate. What is this rate? (%)
asked by Megan 
orgoo
calculate how to make 10 mL of 15:85 ethyl acetate:hexane solution from 2 mL of 5:95 ethyl acetate:hexane, using pure hexane and pure ethyl acetate.
asked by Jess 
SCIENCE
Why might there be different kinds of thermometers for measuring temperature?
asked by ABC123 
Chemistry
The solution CrCl3 is not colored. What does this suggest about its electron configuration?
asked by Shelby 
chemistry
Why would benzene boil at 100C instead of 80C?
asked by shelwa 
Science Chemistry
In the standard deviation, the decimal place of the first nonzero digit indicates where the precision of the average ends (decimal place where the individual results deviate from each other). All your mass readings have 56 significant figures, so one
asked by Sonia 
math
find the functional values requested in the problem F(x)=x^225t (a)F(5t)= (b)F(6t)=
asked by missfubuc 
Chemistry
A molecule has a glycerol backbone. The branches off of the three carbons are as follows: oco(ch2)14  ch3 oco(ch2)12  ch3 oco(ch2)16  ch3 What is this compound called?
asked by KnowsNothing 
precal
what is the slant asymptote of the graph of the rational function and b use the slant to graph the rational function. f(x)x^2x20/x6 a. y=? or either there is no slant rational function B. use the slant asymptote to graph the function(first determine the
asked by ladybug 
SOC 101
soc 101 In most developed nations health care is?
asked by bob 
physics
Hypothetically a pebble rolls off the roof edge of Golden Eagle Arena and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of Golden Eagle Arena's roof edge.
asked by Anonymous 
Physics
The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809 meters by the time it reached home plate, 18.3 meters away. How fast was the pitch? So for i know that
asked by Michael 
physics
Hypothetically a pebble rolls off the roof edge of Golden Eagle Arena and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of Golden Eagle Arena's roof edge.
asked by Anonymous 
statistics
A researcher wants to study the spending habits of customers of a local shopping mall. The mall manager claims that the average spending per customer is $70, but the researcher believes that the average is less than $70. A simple random sample of 350
asked by James 
Chem(Project help)
I need a chemist who discovered something we use in everyday life for a project does anyone know any? THanks a ton
asked by Jessica 
physics
A scraper is drawn over a tooth 22 times, each time moving a distance of 0.75 cm. The scraper is held against the tooth with a normal force of 5.4 N. Assuming a coefficient of kinetic friction of 0.90 between the scraper and the tooth, determine the work
asked by Mollie 
Math
Let a be an integer, then there are integers X, Y such that aX+(a+1)Y=1. Find the smallest positive value of Y.
asked by Anonymous 
Physics
Two spheres are launched horizontally from a 1.0 high table. Sphere is launched with an initial speed of 4.5 . Sphere is launched with an initial speed of 3.0 . What is the time for the sphere A to hit the floor? What is the time for the sphere B to hit
asked by anonymous 
biology project
i want a topic for investigatory project of biology...
asked by Snehal 
Chemistry
I need to find the average molar mass of an unknown element. The atomic mass is 120; the mass numbers of isotopes are 295, 296, 297, 298 and 299; the percent of each isotope is 2.356%, 4.325%, 15.652%, 48.452% and 29.215%. The mass of the neutron is
asked by Joe 
chemistry
Q1) How many resonances are expected in the 13C NMR spectrum of propan1ol? Q2) A student measures the EMF of the following electrochemical cell at 31oC in a solution that is 0.22 molL1 in Hg2+ against a Saturated Calomel Electrode as the reference. The
asked by HongKit 
physics
A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.16 m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.58 s before
asked by Sonia 
Physics
A gray kangaroo can bound across a flat stretch of ground with each jump carrying it 11 from the takeoff point. If the kangaroo leaves the ground at a 18 angle, what is its takeoff speed ? What is its horizontal speed?
asked by anonymous 
precalplease help
find the mid point of the line segment joining the points P1 and P2. P1 = (3,5) P2 = (4,7)
asked by ladybug 
Econ
I have spent a few hours on this question. Can anyone help? The demand for Healthy Wheat Cookies is downward sloping, while the supply is upward sloping. Healthy Wheat Cookies are a normal good produced mainly from wheat and sugar. The government recently
asked by Mark 
Probability
Suppose P( A given B)= .6, P(at least one of the two events occurs)= .8, and P(exactly one of the two events occurs)=.6. Then P(A) is equal to? The answer is 2/3. Could someone please explain how to get it. Thanks so much!
asked by Conor 
physics
A parachutist with a camera, both descend ing at a speed of 11.7 m/s, releases the camera at an altitude of 27.3 m. What is the magitude of the velocity of the camera just before it hits the ground? The acceleration of gravity is 9.8 m/s2 and air friction
asked by Anonymous 
Math
if n=45, calculate the number of cosets of An in Sn .
asked by Anonymous 
precal
Can someone please show me how to find an equation for the line with the given properties. Parellel to the lines 3xy= 3; containing the point (0,0) y= (then type your answer in slope intercept form)
asked by ladybug 
Math {ASAP}
What is the value of the expression below? 10  15
asked by Frances Salome 
Math
Linda has 7/8 yard of fabric. She used 2/3 of it to make a purse. How much fabric did she use?
asked by JD 
Algebra
The total amount of water in 2 containers is 35quarts. If 7 quarts gets poured from the container with less water into the continer with more water, the container with more water will have 4times as much water as the other container. How many quarts are in
asked by Josie 
Statistics
If you roll two dice what is the probablity of getting one 2? I think the answer is 1/6 but I'm not sure
asked by Mary 
chemistry
what fraction of an original sample of a radioactive isotope remains after three halflives have passed? 1/8?
asked by jake 
dentist
choose components of phosphate buffer
asked by bita 
chemistry
if a reaction vessel contains 11.5g NH3, 12.0g O2, and 10.5g CH4, what is the maximum mass in grams of hydrogen cyanide that could be made?
asked by robert 
Oakton College
How is dividing a polynomial by a binomial similar to or different from the long division you learned in elementary school? Can understanding how to do one kind of division help you with understanding the other kind? What are some examples from real life
asked by Junkoping 
Probability
Consider a deck of 52 cards with the following characteristics: 13 red cards, numbered 1 through 13 13 blue cards, numbered 1 through 13 13 green cards, numbered 1 through 13 13 black cards, numbered 1 through 13 1. Describe the steps necessary to
asked by Dina 
Bio Botony
How is reproducing sexually and asexualy in plants an adaptation? thanks
asked by Rebekah 
english
Explain what is wrong with the following sentence and revise as needed to correct the problem: “I saw mountains of uncollected trash walking along the city streets.”
asked by cathy 
Physics
This is a projectile motion question. A ball with a mass of .4 kg, initially at rest is kicked directly toward a 3 meter fence from a point 20 meters away. The initial velocity is 17 m/s at an angle of 35 degrees. The ball is hit by nothing and there is no
asked by Ethan 
World Geo
which country does not have territories in the pacific? United States Chile New Zealand China Chile?
asked by rawr... im a dinosaur.... rawr 
Literature
How was Opheila mistreated by male characters in Hamlet.
asked by Shelby 
Editoral
So a editoral for the school's newspaper writes advice to students in the school or there more than that.
asked by Laruen 
General Chem
given the pH (7.15)of a solution at 25deg C what is the H3O+ and OH
asked by Jv 
Algebra 1
Perimiter of Rectangle is 54cm, the width is 1/2(length)... what is the width & Length of the triangle?
asked by Karen 
biology
what is the relationship between interactions and interdependence
asked by bob