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2011
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Questions Asked on April 10, 2011

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of
1. 4 answers
2. asked by Katrina
3. 5,178 views
a stone is tied to the end of a string and is swung with a constant speed around a horizontal circle with a radius of 1.5m. if
1. 2 answers
2. asked by sw
3. 4,476 views
40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been
1. 2 answers
2. asked by Bob
3. 4,260 views
The formula T=2*pi*sqrt[L/g] gives the period of a pendulum of length l feet. The period P is the number of seconds it takes for
1. 1 answer
2. asked by Gabi
3. 4,124 views
An acorn and tree leaf fall from the same height and time. Which reaches the ground first and why?
1. 2 answers
2. asked by rob
3. 2,896 views
Sodium carbonate(aq) + hydrofluoric acid(aq) ?What is the formula for the complete chemical equation?
1. 1 answer
2. asked by Angus
3. 2,501 views
Rhombus ABCD has an area of 264 square units. If DB=12 units find AC.So far this is what I have- 1/2(264)=132 132/2=66
1. 1 answer
2. asked by mary
3. 2,386 views
A sample of methane gas, CH4, was collected over water at 25.0ºC and 800 torr. The volume of the wet gas is 4.36 L. What will
1. 1 answer
2. asked by Anonymous
3. 2,034 views
Which of the following combinations will make a good buffer solution?0.05 M H2CO3 + 0.05 M KHCO3 0.5 M HI + 0.5 M CsI 0.3 M
1. 1 answer
2. asked by Sarah
3. 1,932 views
a 5.0 dm3 sample of oxygen at a pressure of 200 kPa and 2.0 dm3 sample of nitrogen at a pressure of 500 kPa are introduced into
1. 1 answer
2. asked by sandra
3. 1,914 views
What is the heat of fusion of silver? what is the heat of vaporization for silver? what is the specific heat of silver?thank
1. 1 answer
2. asked by mariah
3. 1,762 views
1.A 75 kg passenger in a van is wearing a seat belt whent he van moving at 15m/s, collides with a conrete wall. The front end of
1. 1 answer
2. asked by kelly
3. 1,717 views
Cindy bought 3 pounds of candy for $2.16. At this rate , how much would the candy have cost if she had brought only 2 pounds?
1. 2 answers
2. asked by kris
3. 1,607 views
In still water, Maria can paddle at the rate of 7 km/h. The current in which she paddles a speedof 4 km/h.At what valocity does
1. 1 answer
2. asked by Anonymous
3. 1,600 views
An 9.00-cm-diameter, 400 sphere is released from rest at the top of a 1.90-m-long, 20.0 incline. It rolls, without slipping, to
1. 1 answer
2. asked by Dan
3. 1,587 views
Problem : Howm do you find the area of a circle circumscribed about a regular pentagon with a perimeter of 50 inches.So far I
1. 1 answer
2. asked by mary
3. 1,445 views
a ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes over a frictionless pulley of negligible
1. 1 answer
2. asked by Kay
3. 1,391 views
3sin(2x)-2cos(x)=0
1. 1 answer
2. asked by ashley --- HELP PLEASEE!!!
3. 1,374 views
I have a few physics questions:1. How much mechanical work is done by a weightlifter holding a mass of 100 kg, 2.0m above the
1. 5 answers
2. asked by Anonymous
3. 1,350 views
What important contribution did the Phoenicians make to world civilizations? sntly, I don't know. How was htat contribution
1. 4 answers
2. asked by annon
3. 1,317 views
please can u check my answerHere are the questions: 1. A 0.45 kg book is resting on a dessktop 0.64 m high. Calculate the book's
1. 3 answers
2. asked by Anonymous
3. 1,290 views
An object rests on the surface of planet y. Its mass is unknown. Find the acceleration due to gravity near the surface of planet
1. 0 answers
2. asked by camille
3. 1,277 views
Nuclear medicine technologists use the Iodine isotope I-131, with a half-life of 8 days,to check thyroid function of patients.
1. 4 answers
2. asked by Alexia
3. 1,276 views
Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution?
1. 1 answer
2. asked by Rebekah
3. 1,265 views
A sample of O2 gas was collected over water at 23ºC and 711 torr. What is the partial pressure of the O2? (The vapor pressure
1. 1 answer
2. asked by Anonymous
3. 1,235 views
Could someone answer this question so I understand it. Id appreciate it.Click the link for the question.
1. 1 answer
2. asked by Jules
3. 1,209 views
how to prepare 280 ml of a 27% v/v solution of ethanol, C2H6O in water
1. 0 answers
2. asked by lisette
3. 1,190 views
Mr. Petri has a rectangular plot of land with length=20 feet and width=10 feet. He wants to design a flower garden of o circle
1. 1 answer
2. asked by Mingma
3. 1,185 views
Express in partial fraction.7x^2-18x-7 divided by (x-4)(2x^2-6x+3)
1. 1 answer
2. asked by Emma
3. 1,136 views
Why is it important to remount a tire in the same position on a wheel?
1. 0 answers
2. asked by Alex L.
3. 1,134 views
A 4.8-m-tall, 30-cm-diameter concrete column supports a 5.0×105 kg load. By how much is the column compressed?
1. 2 answers
2. asked by Antonio
3. 1,132 views
I tried to summarize my rephrase in a few words. Could you please check them?1) Caliban is kept prisoner in a cave by Prospero.
1. 1 answer
2. asked by Mike1
3. 1,124 views
what are the pros and cons to fur trades in canada in 1600?
1. 2 answers
2. asked by quinn
3. 1,122 views
A rigid rod of massm3is pivoted at point A, and masses m1 and m2 are hanging from it, as shown in the figure. (a) What is the
1. 0 answers
2. asked by liza
3. 1,117 views
You throw a ball straight up in the air. The instant after leaving your hand the ball’s speed is 30 m/s. Ignoring the effects
1. 2 answers
2. asked by john
3. 1,106 views
1)Find the present value of Rs. 2,000 due in 6 years if money is worth compounded semi-annually. (b) Ascertain the present value
1. 1 answer
2. asked by Majid
3. 1,082 views
Except for a few pigeons, Central Park was deserted. Mist hung above the chilled grass. Patches of old snow, scattered here and
1. 6 answers
2. asked by sam
3. 1,071 views
Part 1. The area of a circular pool is approximately 7,850 square feet. The owner wants to replace the tiling at the edge of the
1. 0 answers
2. asked by Adrian
3. 1,053 views
Perform the indicated operation and state the domain. Let f(x)=x-1 and g(x)=x+1f(x) - g(x) Heres my work (x-1) - (x+1) x-x=0 and
1. 5 answers
2. asked by Maya
3. 1,038 views
Does the state (Texas) system for raising revenue rely too much on regressive mechanisms like sales tax, user fees and licenses?
1. 1 answer
2. asked by Joe
3. 1,034 views
How did U.S. manufacturers become vulnerable to offshore outsourcing? Give examples to support your answers.
1. 1 answer
2. asked by paul
3. 1,013 views
A ramp, a pulley, and two boxes.Box A, of mass 10.0 kg, rests on a surface inclined at 37° to the horizontal. It is connected
1. 0 answers
2. asked by Liz
3. 1,007 views
Find the area of a nonagon with a perimeter of 126 inches. Round to the nearest tenth.
1. 2 answers
2. asked by mary
3. 1,006 views
The Evanec Company’s next expected dividend, D_1, is $3.18; its growth rate is 6%; and its common stock now sells for $36.00.
1. 1 answer
2. asked by Herb
3. 997 views
What is the pH of a solution that is 0.40 M in sulfurous acid (H2SO3) and )0.22 M in sodium sulfite (NaHSO3-)? Ka (H2SO3) =
1. 2 answers
2. asked by Nana
3. 973 views
what will be the distance time graph for a train standing at a station?
1. 1 answer
2. asked by disha
3. 968 views
1) The right under which an unpaid seller who is in possession of the goods is entitled to retain them until payment of the
1. 4 answers
2. asked by sushma
3. 960 views
I have 2 fill in the blanks that I need help with.1) When electrons are forced away from a/an ___ plate, work is done. could the
1. 0 answers
2. asked by Kriti
3. 953 views
answer to travis has designed a rectangle with an area of 59 square units. his rectangle is the smallest rectangle with whole
1. 1 answer
2. asked by Nadia
3. 944 views
solve step by step0=-2(8t^2-32t+21)
1. 1 answer
2. asked by Amy
3. 937 views
A student weighs out a 13.7 g sample of Cr(NO3)3, transfers it to a 300 mL volumetric flask, adds enough water to dissolve it
1. 1 answer
2. asked by dan johnson
3. 910 views
Nuclear medicine technologists use the Iodine isotope I-131, with a half-life of 8 days,to check thyroid function of patients.
1. 0 answers
2. asked by Alexia
3. 907 views
pls what is the theme in the novel honey, baby , sweetheart. how is this story a tragic story
1. 3 answers
2. asked by ted
3. 894 views
how do you solve:::the sum of two numbers is 3. their difference is 1. find the number.
1. 2 answers
2. asked by Anonymous
3. 885 views
If a baseball is thrown 30 m/s backwards from a truck moving 50 m/s, how fast will the ball strike the glove of a ground-based
1. 1 answer
2. asked by nick
3. 881 views
A 375 g piece of iron was heated to 975 °C and then quenched in a bucket containing one gallon of water at 20 °C. What was the
1. 1 answer
2. asked by Whitney
3. 869 views
Two blocks are connected by a heavy uniform rope with a mass of4.00 . The topblock is 6.00kg, the bottom block is 5.00kg with an
1. 0 answers
2. asked by mike
3. 845 views
A car rents for $40 per day plus 18 cents per mile. Your on a budget of $67 a day. What mileage will allow you to stay within
1. 1 answer
2. asked by Debra
3. 837 views
in a regular polygon, with center O, and a side AB, measure of angle AOB =72 degrees. If AB is 4.6 in. find the perimeter
1. 0 answers
2. asked by mark
3. 836 views
Persons A and B are standing on a board of uniform linear density that is balanced on two supports, as shown in the figure. What
1. 3 answers
2. asked by I need help
3. 834 views
Find the area of a regular hexagon with side length of 10 centimeters. Round to the nearest tenth.
1. 1 answer
2. asked by mary
3. 831 views
I'm trying to find the gravitational force of an electron at earth's surface.I know I say Fg = mass electron * gravity Gravity
1. 2 answers
2. asked by Melissa
3. 828 views
Five balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the
1. 0 answers
2. asked by Brittany
3. 823 views
i have a test on monday1 A beach ball is thrown straight up with a speed of 10m/s from a point 2 m above the ground a) Assuming
1. 2 answers
2. asked by deepti
3. 812 views
1. a little spider monkey named flo has stolen a bunch of bananas from her older brother Charley and is now running away frm him
1. 2 answers
2. asked by deepti
3. 811 views
calculate the molar concentration of H3PO4 in the cola sample.Volume of decarbonated cola used 25.00mL, Molarity of NaOH used
1. 1 answer
2. asked by Anonymous
3. 798 views
In preparation for a demonstration on conservation of energy, a professor attaches a 8.7-kg bowling ball to a 3.2-m-long rope.
1. 1 answer
2. asked by kelly
3. 798 views
if x+y=11, y+z=14, and x+z=13, what is the value of x+y+z ?
1. 2 answers
2. asked by Chanell
3. 785 views
Given that the Ka of benzoic acid is 6.50 x 10-5, how would one prepare 0.500 L of a benzoic acid/sodium benzoate buffer of a
1. 2 answers
2. asked by Nadine
3. 781 views
-2(4x-7)=2x-5
1. 2 answers
2. asked by Carleen
3. 775 views
A trapdoor on a stage has a mass of 20.8 kg and a width of 1.51 m (hinge side to handle side). The door can be treated as having
1. 1 answer
2. asked by kelly
3. 767 views
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of
1. 3 answers
2. asked by Katrina
3. 765 views
find the volume of the solid generated by the revolution of the cycloid x=a(theta-sin theta), y=a(1- cos theta) about its base
1. 1 answer
2. asked by vikram
3. 739 views
Hydrazine is used as a rocket fuel. When 1.50 g of hydrazine, N2H4, was burned in a bomb calorimeter, temperature increased from
1. 1 answer
2. asked by Maria
3. 722 views
1. The time it takes a student to cycle to school is normally distributed with a mean of 15 minutes and a variance of 2. The
1. 1 answer
2. asked by tan
3. 716 views
HELP!!!I don't understand the question and need an asnwer fast! Two different memberships are available at a discount department
1. 3 answers
2. asked by Kylie<3
3. 712 views
How does the rulling government affect the daily lives of those in afghnistan? in a Thousand Slendid Suns
1. 1 answer
2. asked by ricki
3. 706 views
I forgot to include the very last sentences of the day. Thank you very much.1) Every week a person in Britain uses three plastic
1. 1 answer
2. asked by Mike1
3. 692 views
The molar heat of vaporization of benzene is 31kj/mol. Calculate the entropy change for the liquid vapor equilibrium. At 1 atm
1. 0 answers
2. asked by Tiffany
3. 688 views
A resitor of unknown resistance and a 35-omega resistor are connected across a 120-V emf device in such a way that an 11-A
1. 1 answer
2. asked by John - PLEASE Help!
3. 687 views
Silicon is doped an acceptor of 10^18/cm^3. Find the electron and hole concentration, the electron and hole mobilities, and the
1. 2 answers
2. asked by Alex
3. 684 views
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the
1. 2 answers
2. asked by Katrina
3. 684 views
what is the osmolarity of a 1.0M solution of ethyl alcohol (C2H6O) in water?
1. 1 answer
2. asked by kathy
3. 676 views
What are the meaning of good guys and bad guys?
1. 3 answers
2. asked by TITI
3. 674 views
what is the topic sentence in each paragraph?1. Alice Doe’s article discussed overlooked tax deductions. It talked about some
1. 1 answer
2. asked by jason
3. 669 views
Earl N. Meyer found that it took 25.46mL of the 0.0100 M NaOH to reach the firtst equivalence point for the titration of 25.00mL
1. 1 answer
2. asked by Anonymous
3. 662 views
A baseball player pops a pitch straight up. The ball (mass 160 g) was traveling horizontally at 32.0 m/s just before contact
1. 1 answer
2. asked by cloey
3. 660 views
ok so for my etymology class im doing a report and oral presentation on trade names and their etymologies. One of the first
1. 2 answers
2. asked by Hannah
3. 653 views
Express in partial fraction.7x^2-18x-7 divided by (x-4)(2x^2-6x+3)
1. 0 answers
2. asked by Emma
3. 652 views
Find the area of a trapezoid ABCD with verticles A(2,2) B(4,6) C(4,-3)and D(2,-1). Should I use a graph and go from there? I'm
1. 1 answer
2. asked by mary
3. 644 views
the perimeter of an isosceles triangle whose base is 11cm is 39. one of the equal sides of the triangle will be:A 11cm B 9cm C
1. 2 answers
2. asked by dhruv
3. 628 views
Problem : Howm do you find the area of a circle circumscribed about a regular pentagon with a perimeter of 50 inches.So far I
1. 0 answers
2. asked by mary
3. 625 views
Rombus ABCD has an area of 264 square units. If DB =12 units find AC.
1. 1 answer
2. asked by Joy
3. 624 views
A 7uF capacitor is charged to a potential difference of 110V The electrical energy stoed in the capacitor is(4.2x10^-2 was the
1. 1 answer
2. asked by alex
3. 620 views
I tryed finding information on how to cite a movie in MLA style but I am still confused. I need to cite the movie Smooth Talk by
1. 1 answer
2. asked by Hannah
3. 606 views
The difference in potential between any two points in a field is the ___ required to move a unit of whatever is affected by the
1. 0 answers
2. asked by Sejul
3. 606 views
How many grams of nickel (II) sulfate hexahydrate would be present in one liter of a 0.40 molar solution? (Hint: a 1.0 molar
1. 2 answers
2. asked by Jon
3. 595 views
HELP going through home CRISISFind a peer reviewed article which discusses the effects of optimism on physical and psychological
1. 2 answers
2. asked by Love
3. 593 views
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of
1. 0 answers
2. asked by Katrina
3. 584 views
Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution?1)Na
1. 1 answer
2. asked by Rachel
3. 583 views

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