Questions Asked on
December 7, 2010

Chemisty.....Help =))
What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . (please explain step by step I have no clue!) Zn(s) + CuCl2(aq) > ZnCl2(aq)+ Cu(s)
asked by Lisa, Help needed! 
Calculus
If the volume of a cube is increasing at 24 in^3/min and the surface area of the cube is increasing at 12 in^2/min, what is the length of each edge of the cube? I know that dV/dt=24 and ds/ds=12. I also know that Volume=s^3 and Surface Area=6*s^2, but what
asked by Anna 
Physics
When four people with a combined mass of 320 kg sit down in a car, they find that the car drops 0.80 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (when it is
asked by Y0gi 
Chemistry
Palladium107 undergoes â decay (t1/2 = 6.5 x 105 yr) to form silver107. How long will it take for 0.150 mol of silver107 to form from 1.25 mol of palladium107? help please...thank you :)
asked by Queen 
Calculus
A particle is moving around the unit circle (the circle of radius 1 centered at the origin). At the point (.6 , .8), the particle has horizontal velocity dx/dt=3. What is its vertical velocity dy/dt at that point? I don't know what equation to use or
asked by Anna 
Chemistry
WHAT IS THE BOILING POINT OF THIS SOLUTION? 1.00x10^2g C10,H8,O6,S2 (1,5naphthalenedisulfonic acid) in 1.00x10^2g H2O (nonionizing solute)
asked by Jose Reyes 
Calculus
What is the linearization of f(x)=e^x at x=1?
asked by Anna 
physics
A diver runs horizontally off the end of a diving board with an initial speed of 1.75 sec. If the diving board is 3.0 m above the water line, what is the diver’s speed just before she enters the water?
asked by Ama 
Please Help CHEM
Can you please tell me if these are right? Determine the pH for the following solutions A [OH] = 1.0 X 10^7 M I got 7 B. [H3O+ = 4.2 X 10 ^3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH] = 8.5 X10^9M I got 5.9 What are the [H3O+] and [OH] for a
asked by Jessica 
math
mike has two mats in the shape of triangles. the scale factor of the two mats is 7/9. what is the ratio of the perimeters?
asked by laura 
College Physics
A vacuum cleaner has a measured sound level of 75.7 dB. What is the intensity of this sound? Answer in units of W/m^2
asked by Tammi 
Physics
The A string of a violin is 31 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 5.8×10^−4 kg/m. What are the wave speed in the string? What are the tension in the string? What is the length of the tube of
asked by Jake 
statistics
the quality control inspector of a production plant will reflect a batch of syringes if two or more defectives syringes are found in a random sample of ten syringes taken from the batch of two percent defective syringes.what is the probability that the
asked by gaio 
calculus
use the graph of f(x) in the graph to find the sign (positive or negative) of dy/dx and d2y/d2x at the points A,B,C, and D
asked by Anonymous 
ipc
A sailboat is traveling at a steady speed of 13 mph. The force of the wind pushing against the sail is _______ the opposing force of the water resistance.
asked by eddie 
physics
the maximum height a typical person can jump from a crouched start is about 60cm. By how much does the gravitational potential energy increase for a 72kg person in such a jump? Where does this energy come from? I know the formula for gravitational
asked by physics 
english
I need two examples where in the book Huckleberry finn. Huck doesn't believe in himself or he is having self doubt. does anyone know an example or two where this happens in the book? thanks
asked by hannah 
Chem for final, please help!
How many moles of H+(aq) ions are present in 1.25 L of 0.75M Nitric Acid? A. 0.60 mol B. 0.75 mol C. 0.94 mol D. 1.7 mol E. 1.9 mol Please show me how to work this!
asked by lavonne 
Chemistry
What is the molecular weight of a gas if a 21.0g sample has a pressure of 836mm Hg at 25.0 degrees C in a 2.00L flash?
asked by Shirley 
9th grade
at 20 degrees celsius, how much sodium chloride could be dissolved in 2 L of water?
asked by megan 
Physics
A 60 dB sound wave strikes an eardrum whose area is 4.1×10^−5 m^2. How much energy is absorbed by the eardrum per second? At this rate, how long would it take your eardrum to receive a total energy of 4.6 J?
asked by Eden 
Chemistry
What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. * Molarity of oxalic acid solution is 0.128 M oxalic acid solution. * Initial volume of Oxalic acid is 19.8 ml and Final volume is
asked by Ivy 
MATH
The path of a large stone fired from a catapult can be modeled by y= 0.00545x^2+1.145x where x is the distance the stone traveled (in yards) and y is the height of the stone (in yards). 1. find the distance the stone traveled. 2. find the maximum height
asked by Shannon 
Help Chemistry
Can you please tell me if these are right? Determine the pH for the following solutions A [OH] = 1.0 X 10^7 M I got 7 B. [H3O+ = 4.2 X 10 ^3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH] = 8.5 X10^9M I got 5.9 What are the [H3O+] and [OH] for a
asked by Jessica 
MATH
If the corresponding angles of 2 polygons are congruent and the lengths of the corresponding sides of the polygons are proportional, the polygons are... a. Regular b. Congruent. c. Symmetric d. Similar
asked by Dobby 
physics
A horizontal pipe contains water at a pressure of 108 kPa flowing with a speed of 1.5 m/s. The pipe narrows to onehalf its original diameter. What are the speed and the pressure of the water when the pipe narrows?
asked by aok 
Chemistry
A 50.0mL sample of 0.10 M HNO2 is titrated with 0.10 M NaOH. What is the pH after 25.0 mL of NaOH have been added?
asked by Eric 
Physics
A 30 N fishing pole is 2.00 m long and has its center of gravity .350 m from the heavy end. A fisherman holds the end of the pole in his left hand as he lifts a 100 N fish. If his right hand is .800 m from the heavy end, how much force does he have to
asked by Jennifer 
chemistry
At 7.0 degrees C, the volume of a gas is 49ml. At the same pressure, its volume is 74 mL at what temperature?
asked by gary 
chemistry
Lead is a toxic metal that affects the central nervous system. A Pbcontaminated water sample contains 0.0011 % Pb by mass. How much of the water (in mL ) contains 165mg of Pb? (Assume a density of 1.0 g/ml.)
asked by Lisa, Help needed! 
MATH
Which of the following normal distributions has the smallest spread? A. A normal distribution with mean 1 and standard deviation 3 B. A normal distribution with mean 0 and standard deviation 2 C. A normal distribution with mean 3 and standard deviation 2
asked by KARINA 
Chemistry
A pure sample of tritium, 3H, was prepared and sealed in a container for a number of years. Tritium undergoes â decay with a halflife of 12.32 years. How long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3H and
asked by Queen 
physics
What is the minimum downward force on the box ( m=30 kg)that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.40 and 0.30, respectively.One person is pulling the box forward with a force of 125
asked by vinu 
physics
a child twirls a yoyo about in a horizontal circle. The yoyo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yoyo? thanks!
asked by i neeeeed helpp!! 
arithmetic
2. Find the general term and 25th term of the sequences c) 15, 13, 11, 9 ...
asked by helen 
Calculate Osmotic Pressure
69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm3 of solution at 20 degrees C. What is the osmotic pressure of the soluton?
asked by Jose Reyes 
Math
A string is cut in half,and one of the halves is used to bundle newspapers. Then one fifth of the remaining string is cut off. The piece left is 8 feet long. How long was the string originally? Please work this out. The anwser is 20 ft. THANKS
asked by Melea 
physics
A water tank springs a leak. Find the speed of water emerging from the hole if the leak is 2.5 m below the surface of the water, which is open to the atmosphere.
asked by aok 
HIS 135
Interview someone !@#$%^&members the Watergate scandal and Nixon’s impeachment and resignation. (Family members, friends, coworkers). Ask the following questions to the person you are interviewing:  How old were you at the time of the Watergate
asked by Pam 
physics
A train on one track moves in the same direction as a second train on the adjacent track. The first train, which is ahead of the second train and moves with a speed of 31.3 m/s, blows a horn whose frequency is 124 Hz. If the frequency heard on the second
asked by aok 
Physics
A sign is supported at its top right corner, point P. The sign is a square with 40 cm on each side and has 8.0 kg mass. What is the magnitude of the horizontal force that P experiences?
asked by Steve 
chemistry
calculate the number of joules released when 175.0 grams of water are cooled from 100.0 to 27.5 celcius
asked by Anonymous 
physics
A block lies on a smooth plane tilted at an angle è = 28.5° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. 1 m/s2 (b) If the block starts from rest 9.40 m up the plane from its base, what will
asked by An 
stastics
johns runs a computer software store.he counted 128 people who walkrd by his store in a day , 60 of whom came into the store, of the 60 only 21 brought something in the store.estimate the prob that that a person who walks by the storeenter the store .round
asked by gaio 
science
How to write 5,800 million metric tons in standard form and in scientific notation?
asked by Robert 
MATH
Which of the following has 2 parallel bases that are not polygons? a. Cone b. Prism c. Pyramid d. Cylinder
asked by Dobby 
algebra 2
A flagpole at a right angle to the horizontal is located on a slope that makes an angle of 12 degrees with the horizontal. The pole's shadow is 16 meters long and points directly up to the slope. The angle of elevation of the sun is 20 degrees. Draw the
asked by katie 
calculas
find the perimeter of the rectangle with maximum area that can be inscribed in a semicircle of radius 2 ft. if two of its vertices are on the diameter of the semicircle and the other two are on the semicircle.
asked by Anonymous 
Physics
A convex mirror with focal length of 20 cm forms an image 12 cm behind the surface. Where is the object located as measured from the surface?
asked by Max 
Physics
A piano string having a mass per unit length equal to 5.00 „e 10¡V3 kg/m is under a tension of 1 350 N. Find the speed with which a wave travels on this string.
asked by Cf 
math
ascuba diver is 180 ft below sea level and rises to the vsurface at a rate of 30 ft/min.How long will the diver take to reach the surface?
asked by hobbies 
analogys
dream is to wish as goal is to ******* receive is to request as find is to******
asked by dog girl 
Physics
A convex mirror with focal length of 20 cm forms an image 12 cm behind the surface. Where is the object located as measured from the surface?
asked by Max 
statistics
A USU today survey found that of the gun owners surveyed 275 favor stricter gun laws. Test the claim that the majority (more than 50%) of gun owners favor stricter gun laws. Use a .05 significance level.
asked by randy 
Chemistry
WHAT IS THE FREEZING POINT OF THIS SOLUTION? 25.5g C7,H11,N,O7,S(4nitro2toluenesulfonic acid dihydrate) in 1.00x10^2g H2O(nonionizing solute)
asked by Jose Reyes 
physics
a 4 kg object moving with a speed of 7.8 m/s collides with a 16 kg object moving with a velocity of 7.6 m/s in a direction of 22 degrees from the initial direction of motion the 4 kg object. what is the speed of the two objects after the collision if they
asked by jacquie 
physics
In a tennis serve, a 0.070 kg ball can be accelerated from rest to 35 m/sec over a distance of 0.80 m. find the magnitude of the average force exerted by the racket on the ball during the serve
asked by Kay 
MATH
Katie must take five exams in a math class. Her scores on the first four exams were 68, 66, 82, and 80. Answer the following questions: The maximum score on an exam is 100 points. If it is not possible for Katie to achieve the required score on the exam,
asked by LILO 
Calculus
A rectangle is insribed between the parabolas y=4(x^2) and y=30x^2. What is the maximum area of the rectangle? Domain: [3,3] Range:[2, 40] THANK YOU!
asked by Anna 
chemistry
What is the density of CO2 gas at 25.2 degrees celsius and 98.0kPa?
asked by lavonne 
Chemistry
WHAT IS THE BOILING POINT OF THIS SOLUTION? 25.5g C7,H11,N,O7,S(4nitro2toluenesulfonic acid dihydrate) in 1.00x10^2g H2O(nonionizing solute)
asked by Jose Reyes 
calculus
What is the limit as x approaches infinity of radical (9x*2+x)3x?
asked by joc 
physics
A 0.480 kg pendulum bob passes through the lowest part of its path at a speed of 3.10 m/s. (b) When the pendulum reaches its highest point, what angle does the cable make with the vertical? The cable of the pendulum is 80 cm or .8m.
asked by kaitlyn 
physics
At the local grocery store, you push a 13.9 kg shopping cart. You stop for a moment to add a bag of dog food to your cart. With a force of 12.0 N, you accelerate the cart from rest through a distance of 2.00 m in 3.00 s. What was the mass of the dog food?
asked by suts 
PHYSICS
The rms speed of a sample of gas is increased by 8% . What is the percent change in the temperature of the gas? What is the percent change in the pressure of the gas, assuming its volume is held constant? PLEASE HELP
asked by Christy 
Chemistry
Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1
asked by Jerome 
Marketing
What is the relationship between channels of distribution and logistics? How does geographical location affect your selection of distribution channels? Give an example of a company that needs both a physical location and an online presence. How do they
asked by Sarah 
Calculus 1
A ladder 10ft long rests against a vertical wall. If the bottom on the ladder slides away from the wall at 2 ft/s, how fast is the angle ladder makes with the ground changing when the bottom of the ladder is 5 ft from the wall.
asked by Tina P 
physics
A 0.480 kg pendulum bob passes through the lowest part of its path at a speed of 3.10 m/s. (b) When the pendulum reaches its highest point, what angle does the cable make with the vertical? The cable of the pendulum is 80 cm or .8m.
asked by kaitlyn 
math
Which quadrilaterals have a)perpendicular diagonals b)opposite angles congruent? c) two pairs of parallel sides? d) a pair of congruent, adjacent sides? My answers a)rhombus and square b)rhombus, square, and parallelogram c)parallelogram, rectangle, and
asked by m 
chemistry
25.00 mL of a 2.00 M solution of NaCl is diluted to a final volume of 100.0 mL. What is the concentration of NaCl in the final solution?
asked by Lia 
math
Consumers pay for electricity by the kilowatthour (the amount of electricity used by a 1,000watt appliance in one hour). If electricity costs 10cents per kilowatthour, what is the cost of running a 100watt lamp for 1. 1 hour? 2. 24 hours? 3. 1 year?
asked by Mike 
Math
Find the only fourdigit perfect square that is a pair of twodigit squares written side by side?
asked by Jay 
healthcare finance
Suppose that a clinic has thirdparty payer revenues of $10,000 a day. On average, it takes the clinic 50 days to collect from its payers. What will be the steady state receivables balance? a. $ 10,000 b. $ 50,000 c. $250,000 d. $500,000 e. $750,000
asked by tori 
algebra
The natural stride up a certain staircase has a slope of 3/5, meaning that a run of 5 inches has a rise of 3 inches. The model for a standard staircase is y=(3/5)x Find the rise for a staircase constructed at a mansion which has a run of 12 inches. Not
asked by chris 
physics
A car traveling 72.0 km/h along a straight, level road is brought uniformly to a stop in a distance of 40.0 m. If the car weighs 8.8 x 103 N, what is the braking force?
asked by Madeline 
science chemistry
How much energy in kilojoules is needed to heat 5.00 g of ice from 10.0 C to 30.0 C ?
asked by allie 
Math
A 720ml container holds a mixture of red, yellow, and white paint in a 5:3:12 ratio. How much more red paint than yellow paint is present in the mixture?
asked by Britney 
Chemistry
How many molecules are in 15g CH4? How do you figure this out?
asked by Lauren K. 
college
A computer manufacturer is about to unveil a new, faster personal computer. The new machine clearly is faster, but initial tests indicate there is more variation in the processing time. The processing time depends on the particular program being run, the
asked by Anonymous 
Physics
if a 120g mass is placed at the 25cm mark and a 25g mass at the 10cm mark, where should a 500g mass be placed to balance the system?
asked by Megan 
MATH
Carmen deposits into an account that pays simple interest at a rate of per year. How much interest will she be paid in the first years?
asked by AMBER 
Chemistry
the concentration of tritium in the wine is 0.34 times that found in the freshly bottled wines. if the half life of the tritium is 12.3 years, estimate the time elapsed since the wine was bottled. help please. thank you :)
asked by Queen 
math help
Suppose you are managing 25 employees, and you need to form three teams to work on three different projects. Assume that all employees will work on exactly one team. Also, each employee has the same qualifications/skills, so any employee can serve on any
asked by aileen 
Math
two cards are drawn without replacement from an ordinary deck of 52 playing cards. what is the probability that both cards are kins if the first card drawn was a king? I was thinking it was 13/51 but not sure.
asked by Rena 
chemistry
2 NO(g) + 1 O2(g) 2 NO2(g) Calculate K, the equilibrium constant, from thermodynamic data at 289 K. (Hint #1: Assume that S and H do not change with temperature.)
asked by Anonymous 
Physics
A convex lens of focal length 10 cm forms image of object placed 30 cm in front of the lens. Find the magnification?
asked by Shilpa 
Statistics
A researcher wants to estimate the mean serum cholesterol level for college age women. In a past study the stndard devition for this measure was 42 units. If the researcher wants to be off in his estimate by no more than three units ( with 99% confidence),
asked by Marnetta 
algebra
the length of a pool is 30 meters greater than the width. if the area is 1000 square meters, find the dimensions of the pool.
asked by mike 
Calc
Find the area of the largest rectangle that can be inscribed under the curve y = e^(x^2) in the first and second quadrants.
asked by Erica 
Math
An equilateral triangle s divided into 4 congruent equilateral triangles. What method can be used to find the area of the larger equilaterl triangle give the area of one of the smaller triangles? F. Multiply the area of the larger equilateral triangle by 4
asked by Danny 
Chemistry
Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide
asked by Josh 
8th grade math
Matt has twice as many quarters as dimes in his coin collection. If the dimes and quarters together total $9.00 how many of each kind of coin does he have?
asked by Anonymous 
Geometry
The area of a triangle is 6.75 m squared. If the base of the triangle is 3 m, what is the height of the triangle?
asked by Mark 
Chemistry
Experiment on Titration of Acids and Bases Suppose some deionized water was left in the buret before it was filled with the oxalic acid solution you were using as a primary standard. When you perform the standardization of sodium hydroxide in Part 3, how
asked by Jerome 
Geometry
In an equilateral triangle, what is the difference between the sum of the exterior angles and the sum of the interior angles?
asked by Alexis 
physics
A car traveling 72.0 km/h along a straight, level road is brought uniformly to a stop in a distance of 40.0 m. If the car weighs 8.8 x 103 N, what is the braking force?
asked by Madeline 
Math
Use lagrange multipliers to find the point on the plane x2y 3z14=0 that is closet to the origin?(try and minimize the square of the distance of a point (x,y,z) to the origin subject to the constraint that is on the plane) Help me please!
asked by Justin 
algerba..plz help
A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?
asked by abc 
algebra
what three digit number is less than 300 and the ones digit is 4 times the hundreds digit and the tens digit is 5 more than the hundreds digit and the sum of the digits is 17
asked by Karen Nelson 
statistics
The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz. cups. When 15 cups were selected at random, they were found to have mean of
asked by shirley 
Math
Ellie has 22 coins that equal $3.85. What are the coins?
asked by Trent 
advance language arts
base: abase:: prolific:soporific mobile:immobile parley:parliament fortification:fortify CAN ANYONE HELP??
asked by irene 
science
How to write 5,800 million metric tons in standard form and in scientific notation?
asked by Robert 
chemistry
2 Na202 + 2H20 > 4NaOH + 02 When 200.g of Na202 were reacted, 32.0 g of 02 were collected. The yield of 02 collected was (how many percentages)
asked by andy 
Math
Which of the following has 2 parallel bases that are not polygons? a. Cone b. Prism c. Pyramid d. Cylinder
asked by SquarePants 
physics
a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the
asked by jacquie 
6th grade
explain how you would decide whether the product of three numbers is positive or negative
asked by Anonymous 
algebra 1
Hi Ms. Sue again, I hate to be a pest but how did you get the two in 2/10, I am really brain dead today.
asked by robbie 
math
draw a 16mile trail map with five locations where a hiker could start at any location, walk all 16 miles, and return to the same location without walking over any trail twice. I am confused here. At first I thought I would draw the map with the stops
asked by m 
Calculus
A ladder 10 ft long rests against a vertical wall. If the bottom on the ladder slides away from the wall at 2 ft/s, how fast is the angle ladder makes with the ground changing when the bottom of the ladder is 5 ft from the wall?
asked by Tina P 
PHYSICS
A stationary horn emits a 135Hz tone. What frequency is heard by a passenger on a train which is moving towards this horn with a speed of 31.3 m/s?
asked by aok 
english
The essayist's role is to a. study a subject from various points of view. b. put together a believable plot. c. present an accurate account of an event. d. ridicule those who disagree with his or her opinions. A?
asked by Lily 
Physics
At t = 0, a 785 g mass at rest on the end of a horizontal spring (k = 125 N/m) is struck by a hammer, which gives the mass an initial speed of 2.70 m/s. (a) Determine the period of the motion. T= .4979201367s Determine the frequency of the motion. f=
asked by Anon 
spanish
I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and addon if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 2 (el tiempo libre) ¿Cuáles
asked by lauren 
Chemistry
As one descends group 6A of the periodic table, the number of valence electrons found in each element? A. Increases B. Decreases C. Remains the same
asked by Ivy 
Chemistry...Help!!
To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ?
asked by Lisa, Help needed! 
Physics
When a massspring system oscillates with a small amplitude of A1, it has a period of 1.0 s. If the system is then made to oscillate with a larger amplitude of A2 = 2*A1, what is the new period? Thanks!
asked by Linda 
College Chemistry Really Need Help
THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)
asked by KEVIN 
physics
a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the
asked by jacquie 
Chemistry
A 23.6 molar solution of formic acid (methanoic acid) has a density of 1.16 g/ml. The molar mass of H, C, and O are 1g/mol, 12g/mol and 16 g/mol, respectively. What is the molality of this solution?
asked by Eddie 
physics
5. A truck is travelling at a constant velocity of 16.7 m/s. A pumpkin is shot vertically (at a 90o angle to the ground)at a velocity of 120. m/s from the bed of a this pickup truck. The bed of the pickup truck is one meter high (from the ground). Complete
asked by Alex 
algebra
Find a pair of complementary angles such that the difference of their measures is 12 degrees.
asked by Northeast Middle School 
MATH urgent!!!
My problem: From 1992 to 1996, the annual income for all the private golf courses in the United States can be approximated by the model: I=59t^2+2254, where I is the annual income in millions of dollars and t is the year, with t=0 corresponding to 1990. 1.
asked by Shannon 
statistics
An Urn contains 7 red and 3 white balls. Two balls are drawn in succession without replacement. If the second ball is white, what is the probability that the first ball was white?
asked by Emily 
math
if possible, change each comparison of concentrate to water into a ratio. If not, explain why. a. the mix is 60% concentrate. b. the fraction of the mix that is water is 3/5 c. the difference between the amount of concentrate and water is 4 cups
asked by Jack 
Mathematics
Show that 2i and 1i are both solutions to the equation x^2(1+i)x+(2+2i)=0 but their conjugates,2i and 1+i are not. Then explain why this does not violate the Conjugate Zeros Theorem.
asked by Sarah 
Chemistry
An unlabeled bottle containing a solution was found in the lab. It contains one of the following: AgNo3, CaCl2, or Al2(SO4)3. Describe how you would test the solution to determine which solution it is. Include equations in your answer.
asked by Abigal 
pre algebra 6th grade
Tara's bank account contains $250.00. She made only one deposit exactly one year ago. The bank account pays a simple interest rate of 8%. How much money did Tara deposit in the account one year ago?
asked by Suzanne 
11th grade
a yoyo has a mass of 0.20kg and i attached to a string 0.8m long. what isthe velocity of the yoyo?
asked by Anonymous 
PreCalc
I am seeking help with this problem Please...Thank you! Find the point on the line y=x+3 in the xyplane that is closest to the point (3, 2)
asked by Roy 
Chemistry
Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1
asked by Ivy 
Physics
Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare
asked by Annie 
Chem
did I do this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume of the reaction
asked by Jason 
physics
The displacement from the equilibrium caused by a wave on a string is given by: y(x, t) = (0.00200 m) sin [40 m1)x – (800 s1)t]. What are the number of waves in 1 m
asked by Madeline 
Math
In a survey of 204 people, the following incomplete information was recorded relating gender to colorblindness: Complete the table on a separate sheet of paper, then complete Parts (a)  (d). There are no required fillins within the table. ColorBlind
asked by Jenia 
college Chemistry
A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?
asked by Ivy 
Micro Economic Theory
How do you find the budget constraint given the utility function u = q1^(1/3) + q2
asked by Terri 
English
Choose the correct word to complete each sentence. 1. Despite wanting to pass the exam, Julia just couldn't get down to revising. She seemed to have a mental ___ about it. a. brick b. gap c. block d. space 2. When the counsellor listened to George's
asked by Paige 
Chemistry
A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of H2SO4?
asked by Ivy 
Russian
A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best supports the generalization that revolution is most likely to occur when
asked by Anonymous 
math
jhon needs to bulid a fence around his yard , which is 96 ft. wide and 120 ft. deep. A.how much fence mst he buy to enclose all four sides?answer: B .if the fence cost$12.87 for an 8 ft. length, how much will the entirefence cost befor the tax is added?
asked by cindy 
PLEASE HELP Chem
Please tell me if these are right. 1.According to Le Chatelier’s principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a. 2NH3(g) < = > 3H2(g) + N2(g) B. N2(g) + O2(g) 2NO(g) C.
asked by Carrie 
Math
Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that both cards are kings if the first card drawn was a king? I'm thinking its 13/51 but not sure.
asked by Rena 
calculas
x and y are both variables that are differentiable with respect to t, but not to each other. however, there is a relationship between them: x^2=3y^2+7. we also know that x changes with respect to t at a steady rate of square root of 12 (dx/dt=x'= square
asked by Anonymous 
chemistry
Coprecipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the coprecipitates which are more soluble that the
asked by Patrick 
Physics
A 3.90×10^2kg cube of ice at an initial temperature of 18.0degreesC is placed in 0.480kg of water at 41.0degreesC in an insulated container of negligible mass. Calculate the change in entropy of the system. I found the equilibrium temperature to be at
asked by Melissa 
college Chemistry
what mass of H 2 O is needed to completely react with 5.10g SiCl4
asked by CHAZ 
spanish
I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and addon if necessary And also would this last me 3 minutes or should i write more to each question?? Tema 4 (un país hispanohablante)
asked by lauren 
History quick question
Did people back in the 1700's use financial aid/assistance.?
asked by rachel 
Spanish
14. Voy a comprar tenis nuevos en ___________. a. el joven b. los zapatos c. la zapateriá d. el gimnasio Not sure... 15. ¿De quién es ______ suéter? a. este b. esta c. su d. esos Either A or B... Thanks MC
asked by mysterychicken 
physics
suppose that a horizontal force of 0.7 n is required to pull a 5.0 kg block across the table at constant speed. what is the initial speed of a 20 g bullet, fired horizontally into the block, if the bullet imbeds in the initially stationary block and causes
asked by ashley 
Physics: Waves in Media
By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
asked by Amanda 
statistics
. Do students at various universities differ in how sociable they are? Twentyfive students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other
asked by Anonymous 
grammar
what the simple predicates male lion have shagy manes
asked by sam 
chemistry
Please write the chemical equation and calculate the reaction enthalpy (or energy) for the total bromination (addition of bromine gas to all double bonds) of 2,3dimethylbutadiene (if you do not know what 2,3dimethylbutadiene is, assume C2H4).
asked by Eddie 
chemm
When a reaction mixture with a total volume of 1180 mL that is 0.0110 M aqueous NaCl was stoichiometrically produced as per the balanced equation, what volume (mL) of 0.0116 M aqueous Ca2+ was required? 3 CaCl2(aq) + 2 Na3PO4(aq) → Ca3(PO4)2(s) + 6
asked by ann 
GRAMMAR
WHATS A VERB
asked by sam 
lan systems
Post your response to the following: Explain what kind of network you are on at work or at home. If you do not have access to a network, ask a friend or family member to explain the type of network they have access to. What benefits does the network
asked by Anonymous 
12th grade
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.65 104 m/s, and the radius of the orbit is 5.30 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has
asked by Anonymous 
algebra
4(3u)+u=22+2u what does u equal?
asked by haley 
marketing
In what stage of the product life cycle is cake mix in the U.S.?
asked by Randa 
business
Need a web site on if the International Court of Justice was the first world court and what are the procedures of the world court?
asked by TONJA 
physics
A hockey puck sliding on the ice with velocity 10m/sec is stopped by a goalie in 0.10sec. what is the goalie stopping distance ∆x in doing so.
asked by Ama 
chemistry
A sample of ammonina gas at 65.5 degrees celsius and 524 torr has avolume of 15.31 L. What is it's volume at 15.8 degrees celsius and its pressure is 524 torr?
asked by lavonne 
Social Studies Urgent
under a socialist government, who make the decisions? can citizens take part in the decisions? or the government makes all the decisions please help and thank you
asked by Need Help! 
college
if the value of machine is 50,000,estimated useful life is eight years and scrap value is 4000 calculate straight line method for 2 years
asked by 123 
chemistry
Calculate the theoretical yield of CO2 when 4.16g of acetylene,C2H2,undergoes complete combustion?
asked by CHAZ 
2nd grade math
It is greater than 7 tens and less than 8 tens. The number. Has 4 ones. Write the number word
asked by Anonymous 
Math help
It has been found that 60 percent of homes subscribe to a cable service including the program "Cooking with Math". However, of these subscribers, 18 percent never watch "Cooking with Math", while 15 percent claim to watch it more than 5 times per week.
asked by Lily 
algebra
how do I figure out the formula for graphing of y=1/4x. I do not understand this at all
asked by lettye 
Finite Math
What interest rate, compounded monthly, would you need to be paid in order to grow a $2000 investment into $3500 over a five year period?
asked by Ericka 
Statistics
You want to estimate the grades of st2%atistics students who gets grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2 percentage points.
asked by Marnetta 
adult education
How educational and career goals different? How are they the same? Why is it essential to set educational and career goals>
asked by keisha 
Physics
A pendulum is constructed of a 6.7 gram mass suspended on a 55cm thread. The mass is displaced vertically 55 cm to a point exactly horizontal from the top of the thread and released. The mass swings down and is cut directly above the mass when the mass is
asked by Hannah 
Physics
Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare
asked by Annie 
interior decorating
historically, who influencedthe style and trends of art, architecture, furniture and fashion? a. interior designers b. upper class c. architects d. artists
asked by ericka 
writting
hoW do you righ a letter to A GAINT ALIEN THAT NEEDS SOARLAYS BUT TRaveliing anget said the moon
asked by sam 
COLLEGE CHEMISTRY
THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)
asked by SHANICE 
chemistry pap
How many atoms of lead (Pb) are present in 0.75 moles?
asked by nicola 
PhysicsPlease help
Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare
asked by Annie 
MAT 110
How many milliliters of a 25% solution contain 10 g of the pure drug?
asked by Vickie 
Economics for Manager
Hello, Could someone please help me find the answer to this question: The two largest diner chains in Kansas compete for weekday breakfast consumers. The two chains, Golden Inn and Village Diner, each offer weekday breakfast customer a “breakfast club”
asked by Daniel 
statistics
Hello. I recently had this question on my Midterm "Suppose the number of students coming to Thomas’s Monday office hours follows a Poisson distribution with mean 5. Further suppose that 30% of these students wear glasses. What is the probability that for
asked by Anna 
physics
Two stones of different masses are thrown straight upward one on earth and on the moon (where gravity produces an acceleration of 1.67m/second squared) Both reach the same height. if the stone on the moon has an initial speed v, what was the initial speed
asked by first name 
7th grade math
9.8c + 8d  4.6c + 2.9d simpilfy the expression
asked by Daniel 
Finite Math
What interest rate, compounded weekly, would you need to be paid in order to grow an $8000 investment into $12,000 over a ten year period?
asked by Ericka 
Algebra
Why do some regressions models give you r and some give you r squared? What does r squared tell you? If you take the square root of r squared for a model and get a number close to one does that mean that the closer the square root of r squared to one, it
asked by Kevin 
Stastics
An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees were considered. Their mean salaray was $34,000. POP sd of $4,000. Does her claim seem reasonable at at 0.05 significance level?
asked by Sammy Jo 
PhysicsPlease check if I did this correctly
I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the
asked by Joey 
Social Studies
Explain briefly the people and their culture. 1. Africa 2. Asian 3. South Pacific
asked by Gloria 
physics
A model rocket is launched with an initial velocity of 10 m/sec at an angle of 45° to the ground. What is the total time of flight? What is the highest point in its trajectory? What is the horizontal range archieved?
asked by Ama 
7th grade
i need help in Math with Fractions can i have some pointer to remember it. P.s. Thank you guys if u can help
asked by Mj 
Math 7th
Mrs.Flores bought 5 pounds of cheese. He used 2 1/4 pounds for cheese spread. 1 3/4 pounds for nachos and the rest for sandwhichs. Write a procedue that could be used to find the number of pounds of cheese he used for sandwhiches
asked by Danny 
PreCalc
Seeking step by step help with this question...Thank you much. Let f(x) =9x. For the area above the xaxis and between the lines x= 9 and x=18
asked by Amy 
Math 7th
Mrs. Jones bought 3 1/2 pounds of ajita meat at $2.50 per pound, 1 3/4 pounds of pinto beans and a package of tortillas for $2.23. She gave the cashier 20.00. What other information is needed to find the correct change Mrs.Jones will receive?
asked by Danny 
physics
This refers to passive solar collector, where solar radiation is used to heat water. It is therefore not on the solar cells. What characteristics should solar collectors have, to function in an optimal way? Why should these properties be fulfilled? If
asked by bark 
English
Sunlight hits the solar cells on the backpack. The solar cells change sunlight into electricity. The electricity is stored in the battery. A cell phone or an MP3 player can be plugged into it. (In this passage, what does 'it' refer to in the last
asked by rfvv 
english
What are the adjectives in this sentence? A giant sequoyia is ancient.
asked by kaye 
History/ English
I have to write a thesis statement and a prompt for my research paper and my topic is the Tet Offensive, how do i write a good one? I don't even know where to begin!
asked by Courtnee 
Chemistry
As one descends group 6A of the periodic table, the number of valence electrons found in each element? A. Increases B. Decreases C. Remains the same
asked by Ivy 
accounting
Does the flexible budget term mean A series of budgets for varying rates of activity?
asked by jack 
algebra 1
I need someone to help me fiqure this equation out and then explain how you got the answer. x + 7/10 = 1/5
asked by robbie 
english
Assuming that you are a mirror' explain it is a man's best friend in his youth and worst enemy in one's old age
asked by ravi 
chemistry
Explain jhow you would make 400 milliliters of an 18% solution from dry glucose and distilled water.
asked by juan 
math
the regular season for professinal baseball is 162 games.a player was bat in each game ,and he played in 2/3 timesof the game. a. how many times was the player at bat during the season? b.the player hit 0.250,which means he got a hit 25% of the time,or oce
asked by cindy 
Physics
While traveling to school at 27 m/s your car runs out of gas 15 hm from the nearest gas station. If the station is 16m above your current elevation, how fast will the car be going when it reaches the gas station? Ignore friction.
asked by Ben 
physics
A car that is initially at rest at the top of a rollercoaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10mhigh circular hill at the bottom?
asked by Shelby 
HEAT
A container holds a quantity of liquid nitrogen at a temperature of 200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a
asked by Sydney 
Chemistry
Coprecipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the coprecipitates which are more soluble that the
asked by Patrick 
Math
The problem tells us to approximate the integral using the midpoint rule. n=5, sin(x)2 dx 0 to 1. I understand that the answer is .2(sin(.1)^2 + sin(.3)^...). When I use my calculator to get the decimal answer, I cannot get the same answer the book has. I
asked by Judy 
Social Studies Urgent
how do democratic governments and socialist governments maintain power? please help and thank you
asked by Need Help! 
social studies 5thgrade
Does the size of the planet affect the time it takes for one revolution around the Sun? The answer is No, but why is it because of the gracity pull from the Sun? Thank you
asked by jill 
Physics
posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the
asked by Joey 
English
Hello. I wonder if English has certain rules concerning word division (I mean when there isn't enough space for a word on the line (organize). I will appreciate it if you give a reference (if any)to this material. Thank you for all your detailed answers.
asked by Ilma 
Psychology
The question is true or false. Language that elicits defensiveness usually involves giving both individuals equal power. I know that when you remove defensiveness then there is equal power, but I don't know what 'elicits' means in this sentence.
asked by Avalon 
Physics
A spherical concave mirror has a radius R=360 mm forms an image of a h(object)=12 cm high object located d0=p=0.9 m from the vertex of the mirror. Find the position di=q(cm) and the height cm of the image.
asked by Shilpa 
math
The net is 3 feet high. The distance from where the ball is hit to the net is 24 feet. Assume the ball travels in a straight line. At what height must a tennis ball be hit so that it will just pass over the net and land 21 feet away from the net on the
asked by Chandler 
Chemistry
You know the solution forms a precipitate when? (A) when it changes color (B) when you can’t see through it (C) because it bubbles (D) you have stirred it for more than 5 minutes (E) the solution thickens
asked by Ivy 
Math
In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.
asked by Rena 
ALGEBRA/ CONFIRMATION
I am told to graph and write in interval notation for 6 < x < 13. This is my answer (6,13) I would then graph with open ends to show that the endpoints are not included?? Please tell me if I am correct.
asked by Jessica 
physics
A model rocket is launched with an initial velocity of 10 m/sec at an angle of 45° to the ground. What is the total time of flight? What is the highest point in its trajectory? What is the horizontal range achieved?
asked by Kay 
Earth's Heat Sources
most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really don't get this question.
asked by Sydney 
calculas
if the length is decreasing at a rate of 2 in./min. while width is increasing at a rate of 2 in./min., what must be true about area of the rectangle
asked by Anonymous 
physics
A strong man from the circus is being driven in a car which is moving at a constant speed of 5km/h. He decides he will test his strength by trying to stop the car so he pushes on the seat as hard as he can in the direction opposite to the motion of the
asked by Anonymous 
Pre cal
Find the area of a triangle with sides of 12, 14 and 20
asked by Keiven 
spanish
how do you say this sentence in spanish ..How much do you wiegh.
asked by olive 
12th grade
What is the thesis of how would Bryan evaluate the ambitions of Albert Beveridge?
asked by fatou faye 
social studies
In world war ll did hitler die in his bunker?
asked by olive 
Social
Why is the Plain of Abraham such important event in Canada's history?
asked by Florance 
Chemistry Intro
If the solubility of alum is 1g @ 1 degree celcius and 1.7 g at 6 degree celcius how much alum (KAl(SO4)2.12H20) would you expect to dissolve at 5.5% C?
asked by Kat 
8th grade math
After each snowstorm in Big City, USA plows remove snow from 762 lane miles of road, which is equivalent to about 48,000,000 square feet. The snowfall total was 34.2 inches in Big City, USA last winter. Suppose every snowfall evenly blanketed all road
asked by Anonymous 
5th grade math
The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long? Also to find the circumference of a circle do you use the radius or diameter x 3.14?
asked by jill 
English
· Read two of the five paragraphs on the second page of this appendix. Write a brief paragraph of about 150 words in which you do the following: · o Identify which paragraph was more effective and analyze why this is so. o Include a discussion of
asked by Jen 
Thermodynamics
A combined seperating and throttling calorimeter was used to determined the dryness fraction of steam flowing through a steam main at a pressure of 900kPa. The pressure and temperature after throttling were 100kPa and 110C respectively. The mass of water
asked by Kay 
Alg I
Three towns A, B, and C lie on a straight road in that order.The distance from B to C is 6 miles more than twice the distance from A to B.The distance from A to C is 2 miles more than four times the distance from A to B.What is the distance from A to B?
asked by Jensen 
8th grade
Please suggest a few topics to present in microsoft power point
asked by Firdous 
Math
Kenneth works for albertsons as a cashier. He earns $9.25 per hours and he works 20 hours each week. Write an expression that could be used to determine his total earnings for 1 year
asked by Matt 
Precalc
Can someone please show me the steps to this problem...Thanks in advance. Let f(x) = Ð9xÐ. For the area above the xaxis and between the lines x= 9 and x=18 a. draw and label a sketch with the area shaded b. find the area of the region in the xyplane
asked by Amy 
English
Hello. I'll be very grateful if you will help me again. Please tell me if the sentences are possible in normal English: 1)Iran remains unshakeable / inflexible / steadfast / unwavering in its position. 2)Iran's position stays / remains the same /
asked by Ilma 
math
a bag has 6 marables in it.each marable is either red,blue,or green. what is the least number of marables that you must pull out of the bag to be sure you have 2 marables the same color.
asked by cindy 
physics
I have a capacitance of 5.75e10 What is it in Farads?
asked by Bob 
US
really need HELP!!! can someone please give me a cite. Document a chronology of events beginning with the union's call for a strike. Pullmans Car Company
asked by Attalah 
math
the store were janice and kanisha shop is having a sale on summer clothes.each of the girls want to buy 2 pairs of shorts and three tops.if shorts and tops are on sale for $11.50 each, what is the best estimate of how each girl wold spend?circle answer
asked by cindy 
statistic
The ball team was accused of cheating their soda drinkers by not putting enough soda in their 12 oz. cups. 15 cups were selected at random and found to have a mean of 11.7 oz., sd of 0.5 oz., at a significance level of .01. Test the claim that the
asked by shirley 
physics
brandon launches a projectile at an angle of 75 degrees above the horizontal, which strikes the ground a certain distance down range. for what other angle of launch at the same speed would the projectile land just as far away?
asked by sabina 
math
a roof is 2.5 feet vertically and 12.3 feet horizontally. what is the grade of the roof?
asked by norma 
energy conservation
A car that is initially at rest at the top of a rollercoaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10mhigh circular hill at the bottom?
asked by Shelby 
Childcare Mangment
i have 2 questions 13. Following the nutritional label on a jar of peanut butter, you determine that 1 ounce of the peanut butter contains 115 calories and 9 grams of fat. What percent of the calories come from fat? A. 30 C. 70 B. 40 D. 80 i think is B 5.
asked by Brenda 
physics
Suppose 560.0 J of heat is added to a 111g piece of aluminum at 23.0° C. What is the final temperature of the aluminum?
asked by aok 
Math
Determine whether each general term defines a geometric sequence. Explain. a) f(n)= 2/(3n+1) b) f(n)= 11/(13^n)
asked by Emily 
Math
If a wall is 6th tall and a ladder is leaning against it. The ladder is 8th tall, how far apart is is the base of the ladder away from the wall?
asked by Tiara 
geometry
if mBA=44 find the measure of mBA
asked by emil 
chemistry
A solution of acetic acid, CH3COOH, has a concentration of 0.201 M and a density of 1.00 g mL1. What is the molality of this solution?
asked by austin 
Social Studies
i need help on some questions first question: What does the democratic government provide to the country hope you can help me please and thank you
asked by Need Help! 
physics
If a particle goes from location Xi = 10i + 5j + 2k to location Xf = 15i – 7j + 10k in a time ∆t = 5 sec. what is the average velocity and average speed of the particle?
asked by Ama 
6th grade
for a frequency table what is the best interval for the data 1,14,6, 8, 10, 12, 15, 22, ans 25
asked by shariff 
Chemistry
What is the theoretical justifaction for the order of reaction rates of a cycloalkane, cycloalkene, and benzene?
asked by Olivia 
MATH
Which of the following is NOT true? a. 3 > 8 b. 8 < 4 c. 8 < 9 d. 7 > 8
asked by SquarePants 
10th grade
2xy=5 2x5y=11
asked by star 
social studies
Did someone kill Hitler in world war ll?
asked by olive 
english
I am i stupid?
asked by Anonymous 
physics
what happens to the force of frictionif the coefficient of friction was reduced by one thrid
asked by jen 
INTRODUCTION TO COMPUTERS
The Internet may best be compared to a(n) A. large network of roads. B. series of colored lights. C. loud truck motor. D. enormous skyscraper.
asked by Anonymous 
chemistry
how many mL of 1M HC2H3O2 are required to neutralize a spill of 25mL of 6M NaOH?
asked by erin 
ChemistryHelp!!!
How many grams of chloride ions are in 2.5L of a 1.0 M calcium chloride solution?
asked by Beth 
PhysicsPlease check
I posted this question this morning but I'm not sure of the response Damon provided. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached if the radius of the cylinder is 5.0m and the coefficient of friction
asked by Joey 
Chemistry
The volume of a balloon is 120L at 25 degrees celcius. What is it at 75 degrees celcius?
asked by Damien 
English
a living thing which grows in earth: plant (What does "in earth" mean? Does it mean under the ground or on the ground?)
asked by rfvv 
chemistry
If 840 mL of 0.0140 M aqueous Al3+ and 500 mL of 0.0680 M aqueous Br are reacted, what mass (g) of Br is produced? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s) Molar Mass (g) Br 79.904 Al3+ 26.982 Br 79.904 Molar Volume (L) 22.400 at STP
asked by ann 
PreCALC
Can anyone help me with this problem step by step please... Find the area inside the ellipse in the xyplane determined by the given equation x^2 y^2 ____ + ___ =1 10 25
asked by Amy 
Algebra
Solve by elimination method. 7r3s=14 3r+7s=64 Could never figure out the elimination method. Would love some help with this one. Thanks
asked by Christina 
Earth's Heat Resources
How is the energy that reaches earth's surface returned to space? is is by radiation?
asked by Sydney 
Spanish
you are preparing for a job interview for your dream profession. the job application asks you to write a paragraph eh espanol discussing the following things. please explain why you are interested in this profession, what activities will you do on a daily
asked by Sara 
com155
Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives. What is the most effective way to determine whether a word is an
asked by queen 
economics
what is the history on credit cards?
asked by katie 
physics
A block of wood is moved by a man with a force of 150 N from place A to place B with a uniform velocity of 1.2 m/s. The time taken by him in this process is 30 s.
asked by shalini 
PhysicsPlease help with formula
If you were in a rotor style ride and the riders accelerate until the speed of ride is reached if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall is 0.5, how do you find minimum speed you would need to stick to
asked by Joey 
math
George ran 3/8 mile on Sunday and 2/8 mile on monday. How much farther did george run on sunday than on monday?
asked by areonna 
MATH
K we are learning about Linear Equations and Graphs. And I'm doing the Slopepoint Form, but I'm kind of having troubles with it. Liek I don't really get how to change the slope point form to the slope intercept one. Here is an example: y5 = 1/2(x+4) y5
asked by Alexa 
Social Studies
Name one person from the unite state and talk about their culture
asked by Gloria 
math
Solve. 28x=22
asked by JESSICA 
math
5x/5=3x/8+1
asked by JESSICA 
Math
Calculate the monthly payment by loan amortization table Loan $26,000 Down payment $5,000 11% 36 Months
asked by Debby 
world studies
when & why did the cultures of Egpyt & Nubiabegin to mix?? plz help
asked by Anonymous 
math
We have a circle that has 270 degrees listed outside the circle at the top left. Inside the circle at the bottom right side is a an angle inside the circle with a P. Find the measure of Angle P. Would this be that we take 360270 to get the measure of
asked by m 
music
In a round with 4 people singing Jingle bell rock who would end last if person 1 and 2 start at the same time then person 3 is next then person 4 is last?
asked by olivia 
Chemistry
How do I calculate the thckness of tin if I am only given the density which is 7.28grams
asked by Anonymous 
science,
how are sesons caused
asked by sam 
math
Determine the domain and range of the function. 4X^2 if x2
asked by Jeff 
math
lennifer can you help... 20 divided by (10)= p.s. i don't have a divided by sign.
asked by jesse 
Physics 40
A pendulum bob of mass M1 oscillates with a period of 1.0 s. If the length of the pendulum remains the same, but the pendulum bob is replaced with another one of mass M2 = 2*M1, what is the new period? I need help.
asked by Jennifer 
spanish
I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and addon if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 3 (Chicago) ¿Cómo es Chicago?
asked by lauren 
chemistry
the element germanium has a diamondtype structure.describe the structure of germanium.draw diagram
asked by sweetie 
Physics
I need help solving for q. Here is the formula. F=(k*q*2q)/r^2
asked by Bob 
university of phoenix
I need 700 words explaining what your point of view will be and what plan to accomplish in your paper
asked by jacqueline howard 
algebra
P(1, 3) and R(5, 5) are the endpoints of a diagonal of the rectangle PQRS. Which sides of the rectangle are parallel to the xaxis? To the yaxis? What is the perimeter of the rectangle?
asked by Patrick 
MATH
Max’s credit card charges him 1.575% interest per month on his average daily balance in that month. Max’s average daily balance for January is $810. What is the interest that he will pay for January
asked by JESSICA 
Chemistry
Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1
asked by Ivy 
6th grade
What are some of the similarities between the Israelites and Mesopotomians?
asked by Dyaln 
math
the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air. heating cost=0,002Q(delta T) and blower operating cost Blower cost=2.6^(10^9)Q^3 where Q= air quantity deliverd through the bed
asked by Alicia 
algebra 1
Hi Ms. Sue can you tell me how you got 2/10 in the equation that I submited a few min. ago the equation was, x + 7/10 =  1/5
asked by robbie 
Algebra
Whenever I see an expression like this, f(x)=5x+6, how do I know if it is a function? Thank you.
asked by Helene 
math
franklin school has 3 boys for every 4 4 girls in fifth grade . there were 140 students in the fifth grade. A.how many are boys B.how many are gorls
asked by cindy 
Pre Alg.
How do you figuer H/9.6=5/12?
asked by Lorie 
english
the mother seal looks fat and scary. in this sentence is the verb used as a linking verb or an action verb
asked by lane mullis 
Math question
I don't understand how to find the aproximate area of a shaded region This problem has a big cirlce with 1/4 shadded with a radius of 20 cm. the answer chocies are A. 90 cm squared B. 270 cm squared C. 314 cm squared D. 1.256 cm squared how do I find the
asked by Anne 
ENGLISH
Peace Like a River by Leif Enger HELP PLEASE!? In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?
asked by KELLY 
physics
Two masses m1 and m2 are suspended from the ceiling by two string segments. What is the tension in each string segment? Let m1 = 10 kg and m2 = 20 kg.
asked by Kay 
Industrial Hygiene
How much vinyl chloride is needed to fill a tank of 250 liter with a 13.5 solution?
asked by Don 
reading
need help to unscramble compound words
asked by aniah 
math
HOW CAN YOU REMOVE ONE OF THE NUMBERS FROM 68 AND HAVE 18 LEFT?
asked by JoAnn 
English
Hello. I need some grammar and lexical help. 1)Is it possible to use the infinitive with "purpose/goal/objective/aim": "the initiative has a purpose/goal to improve the situation" 2)is it possible to say "the visit intends to demonstrate..." (or is
asked by Ilma 
physics
A 3 kg ball is thrown horizontally off a 78.5 m cliff with a speed of 12 m/s. How long does the ball stay in the air?
asked by Audie 
12th grade
How many moles are in 8.8*10 to the 34
asked by yuo 
math
If the numerical values of the perimeter and the area of a square are equal, what are the dimentions of the square?
asked by Steve 
Social Studies
Name one person and talk about their culture from Europe
asked by Gloria 
English
Hello. Will you please help me with the following: 1)Which article is to be used in "This event caused a/the exodus of British citizens." 2)Is "get acquainted with" possible with inanimate nouns (facts, situation, idea, concept)? 3)Is it possible to say
asked by Ilma 
math
Not sure how to answer this m(
asked by m 
government
what is something i would find on commissioners court AGenda and not in city council court agenda?
asked by jen 
chemistry
Explain what is required to create a buffer that needs to protect the pH between 8.1 and 8.5
asked by Ciara 
6th grade
what is a good web site to find a fill in the blank persuasive essay format! please reply ASAP this is due thursday......i only have 2 more days!!!!!!!!
asked by varonica 
science
whatis the deiffecnce between revoule and rotaian
asked by sam 
Computers
I tried to use Google Video Uploader. However, I was not able to log in. I entered my email address and then I entered the pass word, but it didn't work. Many times I tried to log on, but failed. How can I use the Google video Uploader? Would you let me
asked by rfvv 
Math
If the length of a rectangle is x  5 and the area is 4x(exponent2)  12x +9, what is the width?
asked by Jay 
English
Sunlight hits the solar cells on the backpack. (Can we use reaches instead of 'hits' in this sentence?)
asked by rfvv 
math
Sum of a 3 digit # is 24. Ones digit is 2 more than 2xs the hundred dig. Tens dig is 1 more thn 3xs the hund dig. Wats the #??
asked by andy 
Math
A family is moving and has a number of electronic devices in the same packing crate. One of the devices beeps every 8 minutes, another device beeps every 10 minutes, and a third device beeps every 12 minutes. If all the devices beeped together at 3:00pm,
asked by Britney 
Algebra
find the product of (x^2  3x + 5) with the quotient of (10x^6  15x^5  5x^3)
asked by Mary Jo 
poetry
can you teach me poetry
asked by sam 
Chemistry
If all of the energy from a 60watt bulb was put into 1 gram of water at room temperature for 2 seconds, how much would the temperature of the water increase?
asked by Karmelo 
Almeida
The two largest diner chains in Kansas compete for weekday breakfast consumers. The two chains, Golden Inn and Village Diner, each offer weekday breakfast customer a â��breakfast clubâ�� membership that entitles customers to a breakfast buffet
asked by Pedro 
Math hw help
Four candidates, Allen (A), Bryant (B), Chula (C) and Ditka (D), are running for president of a club. The club uses a "First/Second/Third" ranking system. After the polls close, votes are tallied and the following results are obtained ranking 3565 1655 478
asked by Jenia 
Calculus
Find the slope of the tangent line to the curve at (2,1) x/y + x^2y^2 = 6
asked by Prater 
5th grade
how much would a trapizoid worth if the triangle eqauls 1/3
asked by Alex 
PreCalc
Can someone please be kind and show me the steps on this? Thanks Find the equation of the circle centered at the origin in the uvplane that has twice the circumference of the circle whose equation equals (u5)^2 + y^2 =9
asked by Ann 
Commercial Law
What is the difference between an offer and an invitation to treat and why is the difference important
asked by MaSa 
Algebra
The points L(4, 0),M(10, 0), and N(7, 5) form LMN.What is the sum of the slopes of the three sides of the triangle?
asked by Raylon 
CHOIR
MY TEACHER WANTS US TO PRACTICE TO SINING BUT I LEFT MY MUICS ON THE BUS WHAT SHOULD I DO
asked by sam 
science
why are green plants important to humans?
asked by julian 
Math
In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.
asked by Rena 
READING
MY TEACHER SAID WE HAVE TO READ SHIOLH AND HAVE ONLY 1 WEEK WHAT TO DO ABOUT 16 CHARTER WHAT TO DO
asked by sam 
math
what whole number does N stand for if the number sentence bleow is true? [N+5]+[3 times 2]=18
asked by cindy 
math
a circular pool has a radius of 8 ft. what is the longest distance a swimmer can swim without making a turn?
asked by Anonymous 
science
convert 270g to moles
asked by wilson 
math help!
bernardo folds the 2 top corners of a rectanglular piece of paper to form 2 conguent triangles and an isosceles trapezoid. The triangles each have an angle that measures 65. what are the measures of the 2 top angles in the trapezoid? a. 25 and 25 because
asked by DeNawQisha 
math
How do you multiply 3/5 by 3 and write it as an improper fraction?
asked by Alice 
algebra
Find the value of this expression. 2/7 times 42/45 plus 2/5 times 11/3
asked by nique 
social studies
Give an explanation on how the Unite State was founded
asked by Gloria 
Re:Social Studies Urgent
socialist government: who is eligible to vote i've been searching this forever well most of all the socialist question need help on. please help and thank you
asked by Need Help! 
Social Studies Urgent
what freedoms does the people have when the country is run under a socialist government please and thank you
asked by Need Help! 
English
1.Most clarinets (are, is) made of wood. 1.are
asked by Hayden 
science
does the moon have light
asked by sam 
6th grade
17(5)
asked by jesse 
college
Support sentences for the sentence high rise apartments are efficient housing
asked by Anonymous 
complex Analysis
\int_{\infty}^\infty {1 \over (4+x^4)} ,dx
asked by yilma Abdi 
math
17(5)=
asked by jesse 
Chemistry
How do I calculate the thckness of tin if I am only given the density which is 7.28grams
asked by Anonymous 
methodologies
hmo director wants to know ifmanaged care plan meets industry standared. what is on way to do this?
asked by Patty 
Logic Help
1. G > H 2. A > (G • E) 3. A / A • (H v B) 4. 5. 6. 7. 8.
asked by Mary 
algebra
50e.367x=125
asked by Anonymous 
6th grade
20 / (10)=
asked by jesse 
ChemistryConfused!!
You have 10mL of a 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?
asked by Madison 
bio 102
assuming the standard values for the atmospheric partial pressure of N2, O2, AND CO2 at sea level, what is the approximate total partial pressure of the remainig atmospheric gases?
asked by bob 
biotech
write an sop that detail how to create 125 mM potassium phosphate buffer ph 7.1 at 32 degree celcius
asked by jenn 
Earth's Heat Resources
list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.
asked by Sydney 
ChemistryHelp!!
If I have 10mL of 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?
asked by Madison 
chemistry
what steps do i take when trying to figure out how many atoms of copper are contained in 1.15 moles of Cu?
asked by ayzhanah 
physics
A 3 kg ball is thrown horizontally off a 78.5 m cliff with a speed of 12 m/s. How long does the ball stay in the air?
asked by Audie 
spanish
how do you say "i need help now" in spanish
asked by crystal 
math
Billy goes to soccer at 12:49 he ends at 3:45 ..... how many minutes or hours is soccer practice
asked by olive 
MATH
N X 15 N=20,25,30 HOW DO YOU EVALUATE THE EXPRESSION FOR EACH VALUE OF N
asked by Kristy 
english
In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?
asked by kelly 
Chemistry
why do isomers have different properties? please give examples.
asked by Maria 
7th grade
4 reasons europeans came to the coloines
asked by Anonymous 
5th grade
compkete the pattern 25____61____97
asked by johnathan 
English
1.These reeds (come, comes) from cane plants. come
asked by Hayden 
math
17(5)
asked by jesse 
excluded values
excluded value of: 12m²n/24mn³
asked by Cici 
algebra
1. 100x^29 2. 8x^2+14x+6
asked by mike 
disease
WHAT IS CANCER AND HOW DOES ITSTART
asked by sam 
math
how do you explain how all triangles have lines of symmetry
asked by iya 
math
20 divided by(10)
asked by jesse 
math
20 / (10) =
asked by jesse 
math
4/6 + 5/6 THEN MUITLP
asked by sam 
SCOIL STUDIES
WHAT WAS THE ALOMO LIKE
asked by sam 
science
how do you show staregy
asked by sam