Questions Asked in 2011
Most Popular Questions of 2011

English
Need some advice! What to do the with the class for the first time? I don't know the class and they don't know me. They are not children. The youngest person is 20 and the oldest around 3540 There are 10 of them in the group and they are learning English
asked by tee on February 27, 2011 
freedom similes and metaphors?
I'm stuck on what to write for freedom similes and metaphors? help? Thanks!
asked by Skye on April 3, 2011 
English Check
My Answer: 1. Venture 2. calamity 3. turmoil 4. Flagrant 5. comprehensive 6. rehabilitate 7. fluctuate 8.ponder 9.persevere 10. Conventional We tried to stop Anna from jumping, but her 1)___ disregard of our warnings led to a 2)__ that would change her
asked by ME on September 14, 2011 
Math
Does anyone know the answer to the math riddle "Did you hear about..." the answer is 12 words and it's pg 167.
asked by Maddie on December 6, 2011 
English check please help me out
My answers: 1. Suffice 2. Sinister 3. Intricate 4. Incoherent 5. Implausible 6. Degenerate 7. Intercede 8. Sanctuary 9. Vulnerable 10. Scrutiny One summer, Nan worked in a factory with an employee who had recently arrived from France, a soft spoken young
asked by ME on October 6, 2011 
English check please I've corrected it again
. Dispatch 2. Orient 3. Enigma 4. Discern 5. Enhance 6. Attribute 7. Nocturnal 8. Exemplify 9. Mobile 10. Attest Animals Possess sensory powers that humans lack. Homing pigeons fly with great speed and accuracy when 1)___(e)d with messages to faraway
asked by ME on September 14, 2011 
Calculus
A stone is dropped from the upper observation deck of a tower, 200 m above the ground. (Assume g = 9.8 m/s^2.) a)Find the distance (in meters) of the stone above ground level at time t. b)With what velocity does it strike the ground? (Round your answer to
asked by John on November 13, 2011 
vocab
The living room looked immaculate except for a lump under the carpet, an gaunt
asked by me on October 19, 2011 
calculus
a boat leaves a dock at 2:00 pm and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h and reaches the same dock at 3:00 pm. at what time were the two boats closest together
asked by LALA on November 14, 2011 
Chemistry
Write a balanced net ionic equation (include physical states) for the following reaction: Fe(NO3)3(aq) + LiOH(aq) → LiNO3(aq) + Fe(OH)3(s)
asked by Emily on June 27, 2011 
Chemistry
The Hydrolysis Reactions  Write netionic equations for the reaction of each salt with water below. If there is no reaction, write N.R. 1. NH4C2H3O2 2. NH4Cl 3. NaCl 4. Na2CO3 5. NaC2H3O2 6. NaHSO4 7. FeCl3 8. NaH2PO4 9. NaHCO3
asked by K on April 30, 2011 
Physics Honors
A lovesick lad wants to throw a bag of candy and love notes into the open window of his girlfriend's bedroom 10 m above. Assuming it just reaches the window, he throws the love gifts at 60° to the ground: a) At what velocity should he throw the bag? b)
asked by Jacqueline on December 2, 2011 
math
what is the answer to What Do You Get if a Bunch of Bad Guys Fall in the Ocean?
asked by jeremy on April 25, 2011 
physics
Suppose 3 mols of neon (an ideal monatomic gas) at STP are compressed slowly and isothermally to 0.19 the original volume. The gas is then allowed to expand quickly and adiabatically back to its original volume. Find the highest temperature attained by the
asked by david on January 26, 2011 
Calculus
Suppose that p(x) is the density function for heights of American men, in inches, and suppose that p(69)=0.22. Think carefully about what the meaning of this mathematical statement is. (a) Approximately what percent of American men are between 68.7 and
asked by Cesar on October 27, 2011 
Chemistry
Classify the possible combinations of signs for a reaction's ∆H and ∆S values by the resulting spontaneity. A) Spontaneous as written at all temperatures. B) Spontaneous in reverse at all temperatures. C) Spontaneous as written above a certain
asked by Jessica on November 9, 2011 
Physics
A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 353 K. If 25.0 J of work is done by the gas during this process, what is the mass of helium present?
asked by Sean on May 13, 2011 
Calculus (urgent!!)
A particle moves with its position given by x=cos(2t) and y=sin(t), where positions are given in feet from the origin and time t is in seconds. A)Find the speed of the particle. Speed = ____________ (include units) B)Find the first positive time when the
asked by Catherine on April 15, 2011 
Physic
A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle è = 40° with the horizontal. The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on
asked by Don on September 28, 2011 
Chemistry
How many grams of dry NH4Cl need to be added to 2.10L of a 0.600M solution of ammonia,NH3 , to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8x10^5. I just wanted to make sure I dd this write, can you please check my work? Thank
asked by Jessica on October 8, 2011 
Chemistry
Part A Calculate the standard enthalpy change for the reaction 2A+B >2C +2D Use the following data: Substance Delta H(kJ/mol) A 263 B 391 C +203 D 523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART BTHIS ONE I NEED
asked by tina on June 16, 2011 
English grammar
I need to identify the subject, verb, and any complements (direct object, indirect object, subject complement, objective complement) and the prepositional phrases of the following sentances. I thought i had them more or less right but when i turned them in
asked by Eddie on July 5, 2011 
statistics
72% working women use computers choose 5 at random whats the probility at least 1 does not use a computer whats the probility that all 5 use a computer
asked by max on September 17, 2011 
Math
How did the Hunter get hurt while benind over to study some tracks? Algebra with Pizzazz! pg 123 OBJECTIVE: to divide a polynomial by a binomial EX: (x^2+8x+150/(x+5)
asked by k on January 2, 2011 
chemistry
Consider the reaction, C2H4 (g) + H2 (g) C2H6 (g) where 137kJ of heat is released. How many kilojoules are released when 55.3g of C2H4 reacts?
asked by Sandy on July 10, 2011 
physics
A 0.50 kilogram ball is thrown vertically upward with an initial kinetic energy of 25 joules. Approximately how high will the ball rise ?
asked by lucy on April 30, 2011 
Calculus
A parcel delivery service will deliver a package only if the length plus the girth (distance around, taken perpendicular to the length) does not exceed 100 inches. Find the maximum volume of a rectangular box with square ends that satisfies the delivery
asked by Anonymous on November 1, 2011 
physic
Superman must stop a 120km/h train in 150m to keep it from hitting a stalled car on the tracks.If the train's mass is 3.6x10^5kg,how much force must he exert?Compare to the weight of the train (give as%).How much force does the train exerts on Superman?
asked by noah on July 2, 2011 
geometry
What happened when two fruit companies merged?
asked by richard on November 16, 2011 
Physics
Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. Its
asked by falcon306 on July 23, 2011 
Chemistry
Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq). I know the most acidic solution has the lowest pH and the most basic solution has the highest pH. But how am i supposed to know the pH if i don't
asked by Nia on October 17, 2011 
physics
A father racing his son has 1/3 the kinetic energy of the son, who has 1/3 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son?
asked by nan on October 3, 2011 
COM/155
Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. Bold each adverb. Underline each adjective. Compare the event to one or more similar events. When comparing, use at
asked by dan on January 15, 2011 
COMM 155
use at least 5 adverbs and 5 adjectives to write a brief review of a movie bold each adverb underline each adjective use at least 3 comparatives and 3 superlatives Twilight is romantic, intriguing, and full of subtle humor. It is a modern day love story of
asked by Misty on January 13, 2011 
Math
Two fire towers are 30 kilometers apart, tower A being due west of tower B. A fire is spotted from the towers, and the bearings from A and B are E 14 degrees N and W 34 degrees N, respectively. Find the distance d of the fire from the line segment AB.
asked by Mike on May 10, 2011 
Comp 155
Use at least five adverbs and five adjectives to write a brief review of a movie, sporting envent, musical performance, or television show. Bold each adverb. Underline each adjective. This is what I wrote but not sure if I have all the adverbs and
asked by Tracy on May 1, 2011 
java/programming
ask the user to enter his or her birthday in the MM/DD/YYYY format and output the number of days between the birthday and today. This gives the person's age in days.
asked by maria on March 7, 2011 
Business
I am trying to write a 1500 words review of two articles that are discussing ethical perspectives or business ethics for two countries. Each article must contain info. on a different foreign country on a different continent; for example, if the first
asked by kim on January 16, 2011 
english
Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. · Bold each adverb. · Underline each adjective. · Compare the event to one or more similar events. When comparing,
asked by mike on August 14, 2011 
Physics
Hot air balloons float in the air because of the difference in density between cold and hot air. In this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. To do this, use the following variables
asked by Jenny on July 13, 2011 
American Goverment
IRS Federal Agency. List the URL address. Considering the informatioin on the website, briefly describe the mission of the agency. What policy choices might bureaucrats from the agency advocate in order to expand the activities that fit their mission?
asked by Jinx on February 11, 2011 
physics
A bike first accelerates from 0.0 m/s to 5.0 m/s in 4.5 s, then continues at this constant speed for another 4.5 s. What is the total distance traveled by the bike?
asked by lindsey on September 5, 2011 
math
Name the lenghts of the sides of three rectangles with a perimeter of 12 units use whole numbers only. I don't understand the question
asked by malachi on February 16, 2011 
Chemistry
Many power plants produce energy by burning carbonbased fuels, which also produces CO2. CO2 is a greenhouse gas, so overproduction can have negative effects on the environment. Use enthalpy of formation data to calculate the number of moles of CO2 (g)
asked by Harold on January 27, 2011 
Chemistry
Write the net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hydrobromic acid are combined. I know that the first part of the formula would be BaOH + HBr but I do not know what the product would be since HBr is
asked by Hannah on October 9, 2011 
College Chemistry
Write formation reactions for the following. (You must include the states of matter for each atom or compound) A. Ca(NO3)2 (s) B. CH3OH (l) C. NaClO4(s)
asked by Bekah on October 25, 2011 
Spanish
doy a la profesora los libros de español. Amelia pregunta a nosotras si queremos ir al cine. El empleado busca trabajo a sus primas en el almacén. Julio quiere traer un televisor nuevo a sus padres. Los clientes dicen a nosotros que todo está muy caro.
asked by Anonymous on September 22, 2011 
Chemistry
FeSCN2+ > Fe3+ + SCN Solution is initially dark red. If some Ag+ is added to form AgSCN. what happens to position of equilibrium? what happens ot the color?
asked by Grace on February 8, 2011 
math
Michael has a total of $2000 on deposit with two saving institutions. One pays interest at the rate of 6% per year whereas the other pays interest at a rate of 8% per year. If Michael earned a total of $144 in interest during a single year, how much did he
asked by SUBSTITUTION METHOD on May 16, 2011 
physics
A 3.1kilogram gun initially at rest is free to move. When a 0.015kilogram bullet leaves the gun with a speed of 500. meters per second, what is the speed of the gun?
asked by ashley  HELP PLEASEE!!! on May 7, 2011 
Chemistry
For Mn3+, write an equation that shows how the cation acts as an acid.
asked by Ari on February 12, 2011 
physics
when a 2.50 kg object is hung vertically on a certain light spring described by hookes law the spring stretches 2.76 cm. A) what is the force constant of the spring. B) if the 2.50 kg object is removed how far will the spring strecth if a 1.25 kg block is
asked by joe on November 6, 2011 
math
What might you have if you don't feel well?
asked by lolololol on January 15, 2011 
physics
Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C
asked by aj on March 9, 2011 
Chemistry
If you have 320.0 mL of water at 25.00 °C and add 110.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.
asked by Ryan on October 18, 2011 
math
jose said all of the multiples of 8 are also multiples of 2. jamila said that all of the multiples of 8 are also multiples of 4. who is correct. Explain
asked by Alex on November 16, 2011 
physics
A 40 g marble moving at 2.3 m/s strikes a 29 g marble at rest. Assume the collision is perfectly elastic and the marbles collide headon. What is the speed of the first marble immediately after the collision? What is the speed of the second marble
asked by CO2136 on August 10, 2011 
chemistry
In Chemistry: what is ph during the titration of 20.00ml of 0.1000m triethylamine (ch3ch2)3n (kb=5.2x 104) with 0.1000m HCL solution after the additions of titrant : a) 0ml (b) 10.00ml (c) 19.00ml (d)15.00ml (e) 20.00ml (f) 25.00ml
asked by jain on October 17, 2011 
English check please help me out
My answers: 1. Venture 2. Calamity 3. Rehabilitate 4. Persevere 5. Conventional 6. Flagrant 7. Ponder 8. Comprehensive 9. Fluctuate 10. Turmoil 12 The time my cousin (e)d skydiving, the result was a ___. Her parachute didn't open, and she was injured so
asked by ME on September 14, 2011 
Chemistry
Write a balanced chemical equation for the reaction of propylamine with water. Is propylamine > CH3CH2CH2NH2? Is the equation CH3CH2CH2NH2 + H2O > CH3CH2CH2NH3+ + OH right? Isn't this balanced?
asked by Steph on November 13, 2011 
Chemistry
(a) Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 150 mL of solution. (b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid? (c) How many milliliters of 6.00 MNaOH solution are needed to
asked by Anon on October 31, 2011 
Physics Help
A small, 200 g cart is moving at 1.50 m/s on an air track when it collides with a larger, 2.00 kg cart at rest. After the collision, the small cart recoils at 0.890 m/s. Q: What is the speed of the large cart after the collision? How do you set this up?
asked by Cat21 on August 6, 2011 
cheistry
Write a net ionic equation for the overall reaction that occurs when aqueous solutions of hydrosulfuric acid and potassium hydroxide are combined. Assume excess base.
asked by savannah on November 17, 2011 
Physics
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 402 N and F2 = 364 N. (Assume up and to the right as positive directions.)(F1 is 10degrees and F2 is 30degrees) (a) What is the resultant of these two
asked by Dani on May 3, 2011 
can you please look over my answers? clauses
Can you please look over the answers that I have for the different clause questions? Thanks ahead of time! Ohh, & Ssubject, DOdirect object, PNpredicate noun, OPobject of preposition. Thank you! [What I wanted to do] was to finish my work. S The
asked by Amy on December 11, 2011 
geometry
A triangle has side lengths of 18 cm, 80 cm, and 81 cm. Classify it as acute, obtuse, or right
asked by Cindy on December 14, 2011 
Chemistry
write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water
asked by Kristin on May 8, 2011 
chemistry
Ammonia chemically reacts with oxygen gas to produce nitric oxide and water . What mass of ammonia is consumed by the reaction of 4.5g of oxygen gas? Round your answer to significant digits.
asked by Anonymous on September 27, 2011 
physics
A model rocket leaves the ground, heading straight up at 47 m/s. (a) What is its maximum altitude? m What are its speed and altitude at each of the following times? (b) 1 s m/s m (c) 4 s m/s m (d) 8 s m/s m
asked by Jen on January 16, 2011 
physics
Archer pulls her bow string back 0.4 m by exerting a force that increases uniformly from zero to 230 N. What is the equivalent spring constant of the bow? This is what I did: F = kx 230 N = k(0.4 m) 575 = K My question is this: Is the answer just 575 or is
asked by Nabil on February 21, 2011 
math
A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110 ft, and the distance around should be no more than 380 ft. Write a system of inequalities that models the possible dimensions of the garden.
asked by Jane on December 29, 2011 
chemistry
Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: 2 NO(g) + O2(g) → 2 NO2(g), ΔH°rxn = ? Given: N2(g) + O2(g) → 2 NO(g), ΔH°rxn = +183 kJ 1/2 N2(g) + O2(g) → NO2(g), ΔH°rxn = +33 kJ
asked by Amber on June 14, 2011 
geometry
Find the image of O(–2, –1) after two reflections, first across the line y = –5, and then across the line x = 1. (1 point)
asked by Cindy on December 16, 2011 
Math
The numerator of a fraction is two less than its denominator. When both numerator and denominator are increased by 3, the fraction is incre ased by 3/20. Find the original fraction. Pls include solution and workings thx :)
asked by Ghiffari on October 24, 2011 
calculus
The function f is continuous on the closed interval [0,2] and has values that are given in the table below x = 0 1  2 ____________ f(x) = 1 k  2 The equation f(x) = 1/2 must have at least two solutions in the interval [0,2] if K = ? The answer is 0,
asked by Joan on April 20, 2011 
Physics
Two electrostatic point charges of +60.0 uC and +50.c uC exert a repulsive force on each other of 175 N. What is the distance between the two charges?
asked by Pablo on January 16, 2011 
Operations Management
Joe Henry's machine shop uses 2,500 brackets during the course of a year. These brackets are purchased from a supplier 90 miles away. the following information is known about the brackets. annual demand 2,500 holding cost per bracket per year $1.50 order
asked by Jeff on July 6, 2011 
Chemistry
will a red blood cell undergo crenation, hemolysis, or no change in each of the following solutions? 1% (m/v) glucose 2% (m/v) NaCl 5% (m/v) NaCl .1% (m/v)NaCl
asked by Curlyqty on May 9, 2011 
phy
A blue ball is thrown upward with an initial speed of 20.6 m/s, from a height of 0.8 meters above the ground. 2.5 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 8.2 m/s from a height of 23.7 meters above the
asked by a on September 13, 2011 
english
which of the following is an example of an adverbial clause fragment? 1.Wherever there is a chance for a fabulous meal,2. who described the book as a compelling masterpiece or 3.that the poet choose words carefuly to convey a particular tone. I think it is
asked by ron on December 3, 2011 
physics
You are traveling on an airplane. The velocity of the plane with respect to the air is 180 m/s due east. The velocity of the air with respect to the ground is 40 m/s at an angle of 30° west of due north. 1)What is the speed of the plane with respect to
asked by aaa on September 17, 2011 
Stoichiometry
Find the limiting reactant for the initial quantities of reactants 2k(s) + Cl2(g)> 2KCl(s) 1.8 mol K; 1 mol Cl2 I'm lost
asked by Monique on October 4, 2011 
physics
if a car generates 18 hp when traveling at a steady 88 km/h, what must be the average force exerted on the car due to friction and air resistance
asked by eli on December 9, 2011 
physics
A box and its contents have a total mass M = 9 kg. A string passes through a hole in the box, and you pull on the string with a constant force F = 77 N (this is in outer space; there are no other forces acting). (a) Initially the speed of the box was vi =
asked by Anonymous on November 16, 2011 
chemistry 105
Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)>2LiN(s) What mass of lithium (in g ) is required to react completely with 59.9 mL of N2 gas at STP?
asked by JULIE on October 23, 2011 
math
If the line 3x4y = 0 is tangent in the first quadrant to the curve y = x^3 + k, then k is
asked by S on December 28, 2011 
Calc
If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will
asked by Katrina on October 17, 2011 
CHEM please!!! help
Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity of oxygen: 141 kJ/mol
asked by Joanie on April 19, 2011 
Math/ Number sense
Use the numbers shown. Make the sum of the numbers across equal the sum of the number down. 7 5 1 9 3
asked by Harry on November 29, 2011 
chemistry
Potential of a cell is 0.1776 volts PbPb2+(??M)Pb2+(1.0M)Pb I know i have to use Nernst's equation .. i just have no clue how to attempt this :S
asked by joshua on March 29, 2011 
business
Rocky Mountain Tire Center sells 20,000 go cart tires per year. The ordering cost for each tire is $40, and the holding cost is 20% of the purchase price of the tires per year. The purchase price is $20 per tire if fewer than 500 tires are ordered, $18 per
asked by Gin on March 30, 2011 
Calculus
A ball is shot straight up into the air with initial velocity of 47 ft/sec. Assuming that the air resistance can be ignored, how high does it go?
asked by Anonymous on February 2, 2011 
Chemistry
you add 0.05ml of 0.10M agno3 to 4ml of 2.0 nacl it forms saturated solution of agcl ag+ + cl using a saturated solution you set up ag  ag+( test solution after reaction)  ag+(1.0ml)  ag how do we calc the equilibrium of ag+ of the test solution after
asked by Jeanine on March 30, 2011 
Physics
A 49.0 g marble moving at 2.20 m/s strikes a 22.0 g marble at rest. What is the speed of each marble immediately after the collision?
asked by Zeke on November 16, 2011 
English; conmas
Where should commas be placed? Combine flour shortening pecans and cold water to make a tasty pie crust.
asked by Mandy on November 16, 2011 
calculus
Let f be a differentiable function such that f(3) = 2 and f'(3) = 5. If the tangent line to the graph of f at x = 3 is used to find an approximation to a zero of f, that approximation is? So confused
asked by Matt on April 21, 2011 
Physics
A student initially at rest on a frictionless frozen pond throws a 1 kg hammer in one direction. After the throw the hammer moves off in one direction while the student moves off in the other direction. Which of the following correctly describes the above
asked by Mae on November 14, 2011 
math
The radius r of a sphere is increasing at the uniform rate of 0.3 inches per second. At the instant when the surface area S becomes 100pi square inches, what is the rate of increase, in cubic inches per second, in the volume V?
asked by Tim on December 29, 2011 
chemistry
Write molecular, ionic, and net ionic equations. AgNO3(aq) + KBr(aq) >
asked by Brea on June 20, 2011 
chemistry
A buffer is made by dissolving H3PO4 and NaH2PO4 in water. a. write an equation that shows how this buffer neutralizes a small amount of acids. b. write an equation that shows how this buffer neutr?
asked by marcy on November 11, 2011