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Questions Asked on January 25, 2013

2. Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 90 pounds of algae, how much
1. 40 answers
2. asked by Deborah
3. 17,703 views
A guitar string is 90cm long and has a mass of 3.8g . The distance from the bridge to the support post is L=62cm , and the
1. 1 answer
2. asked by Phil
3. 12,135 views
how do owners of large estates spend their time.
1. 17 answers
2. asked by Richie6501
3. 9,673 views
A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?
1. 2 answers
2. asked by Vic
3. 9,239 views
A culture of bacteria grows exponentially. It doubles in size every 16 hours. How long will it take to triple from its original
1. 1 answer
2. asked by Jackie
3. 8,089 views
What kind of map could you use to show information about a city?-a relief map -a population density map -a political boundary
1. 9 answers
2. asked by Anon
3. 7,358 views
If the temperature of a 500.0-g sample of liquid water is raised 2.00c how much heat is absorbed by the water?The specific heat
1. 4 answers
2. asked by gabriella
3. 5,993 views
The value of Kb for HPO₄²- is?A. 2.2*10^-13 B. 6.2*10^-8 C. 1.6*10^-7 D. 4.5*10^-2 I don't get how to solve this.
1. 9 answers
2. asked by Shreya
3. 5,657 views
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to
1. 1 answer
2. asked by Ryan
3. 5,552 views
For melting point determination, what is the optimum rate of heating near the melting point? What are the problems, if the rate
1. 5 answers
2. asked by Sunday
3. 4,936 views
A rowboat crosses a river with a velocity of 3.30 mi/h at an angle 62.5° north of west relative to the water. The river is
1. 1 answer
2. asked by Dan
3. 4,273 views
permuationsan orchestra has 2 violinsts, 2 cellisst, and 4 harpists. Assume that the players of each instrument have to sit
1. 3 answers
2. asked by Shreya
3. 4,089 views
the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for
1. 1 answer
2. asked by lee
3. 3,627 views
5. Suppose that the volumes of four stars in the Milky Way are 2.7 × 1018 km3, 6.9 × 1012 km3, 2.2 × 1012 km3, and 4.9 ×
1. 3 answers
2. asked by Deborah
3. 3,394 views
Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10-59, and dissociates according toCa10(PO4)6(OH)2(
1. 2 answers
2. asked by Angelyka
3. 3,371 views
Two resistors have resistances R(smaller) and R(larger), where R(smaller) < R(larger). When the resistors are connected in
1. 1 answer
2. asked by PLEASE HELP
3. 3,233 views
An airline experiences a no-show rate of 6%. What is the maximum number of reservations that it could accept for a flight with a
1. 4 answers
2. asked by Anonymous
3. 3,216 views
Identical point charges of +2.1 ìC are fixed to diagonally opposite corners of a square. A third charge is then fixed at the
1. 1 answer
2. asked by Amy
3. 3,005 views
How many moles of bromine are there in a 0.35 mL dichloromethane solution of 10% bromine?Density of Bromine = 3.10g/mL Density
1. 1 answer
2. asked by Nathan
3. 2,836 views
The displacement (in meters) of a particle moving in a straight line is given by s=2t^3 where is measured in seconds. Find the
1. 2 answers
2. asked by Anonymous
3. 2,759 views
You split $1500 between two savings accounts. Account A pays annual 5% interest and Account B pays 4% annual interest. After one
1. 2 answers
2. asked by em
3. 2,748 views
Adam drew two same size rectangles and divided them into the same number of eqal parts. He shaded 1/3 of one rectangle and 1/4
1. 6 answers
2. asked by Mary
3. 2,708 views
two sides of a rectangle differ by 3.5cm.find the dimentions of the rectangles if its perimeter is 67cm?
1. 3 answers
2. asked by samin
3. 2,662 views
It is believed that at least 60% of voters from a certain region in Canada favor the free trade agreement (FTA). A recent poll
1. 2 answers
2. asked by Stanley
3. 2,512 views
You are planning to build a walkway that surrounds a rectangular garden that is 10ft by 9ft. The width of the walkway around the
1. 3 answers
2. asked by Naibe
3. 2,409 views
An electric kettle contains 1.5 kg of water at100o C and powered by a 2.0 kW electric element. If the thermostat of the kettle
1. 2 answers
2. asked by christ
3. 2,393 views
What is the mass in kg of a 3920 N piano?
1. 4 answers
2. asked by meme
3. 2,290 views
let f(x)=(x^2+2x-15)/(3x^2+12x-15)Find the horizontal and vertical asymptotes of f(x).
1. 3 answers
2. asked by Anonymous
3. 2,247 views
Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the
1. 1 answer
2. asked by Stacia
3. 2,148 views
assume the substance has a half-life of 11 years and the initial amount is 126 grams.How long will it be until only 15 %
1. 1 answer
2. asked by Jackie
3. 2,141 views
what is the [OH-] in a solution that contains 0.225g of NaOH in 0.250 L of solution
1. 1 answer
2. asked by sofia
3. 2,112 views
Write 5.62*10^5 in standard form
1. 3 answers
2. asked by marie
3. 2,105 views
In the balanced double replacement reaction of calcium chloride CaCl2 and aluminum sulfate Al2(SO4)3, how many grams of calcium
1. 7 answers
2. asked by thad
3. 2,088 views
A rock is thrown off of a 100 foot cliff with an upward velocity of 45 m/s. As a result its height after t seconds is given by
1. 1 answer
2. asked by Anonymous
3. 2,026 views
Light is incident from water onto a flat transparent slab of material, at an angle of 48.8° with the normal. The reflected ray
1. 1 answer
2. asked by Kiana
3. 1,909 views
While shopping for a party,June bought 2 1/6 pounds of hamburger, 4 1/2 pounds of chicken, and 3 pounds of ham.How much meat did
1. 1 answer
2. asked by Jenessa Currie
3. 1,777 views
Which of the following is NOT a characteristic that all organisms share?Select one: a. ability to taste and smell b. ability to
1. 5 answers
2. asked by Anonymous
3. 1,763 views
Find the equation of a circle passing through (3,7) and tangent to the lines x-3y+8=0 and y=3x.Please help me
1. 5 answers
2. asked by xavier
3. 1,746 views
how do owners of large estates spend their time
1. 4 answers
2. asked by Richie6501
3. 1,738 views
A version of the Two-Transversal Proportionality Corollary states, "If three or more parallel lines intersect two transversals,
1. 2 answers
2. asked by jesus
3. 1,694 views
1. Corey needs 24 boards that are 47.5 inches How many feet of board should he buy and then explain.2. If you can only buy 8
1. 3 answers
2. asked by Karen
3. 1,672 views
Find the area of the following circle.r = 9 yd.
1. 3 answers
2. asked by johnny
3. 1,658 views
1. Find the area of the region between the curves y=sin(x pi/2) and y=x.2. Find the area of the region between the curves
1. 1 answer
2. asked by Anonymous
3. 1,646 views
You hold an inflated balloon over a hot air vent in your house and watch it slowly expand. You then remove it and let it cool
1. 1 answer
2. asked by Jasmine
3. 1,639 views
If a farm as 13 heads and 36 feet. How many chicken are there and how many rabbit are there?
1. 1 answer
2. asked by tom
3. 1,596 views
An electron experiences 1.2 x 10^-3 force when it enters the external magnetic field, B with a velocity v. What is the force
1. 1 answer
2. asked by Physics fail
3. 1,578 views
Suppose that the annual interest rate on your checking account is 7.5 percent compounded continuously. In order to have $ 6300
1. 1 answer
2. asked by Jackie
3. 1,543 views
a sample of compound C,H,N and O with a mass of 0.6216 was found to contain 0.1735g C,0.01455g H,0.2024g N.Its molecular mass
1. 1 answer
2. asked by bliss
3. 1,517 views
After 14 boys leave the concert, the ratio of boys to girls is 3 to 10. If there are p girls at the concert, write an algebraic
1. 1 answer
2. asked by Sophia
3. 1,513 views
An innovative rural public health program is reducing infant mortality in a certain West African country. Pretend the program in
1. 1 answer
2. asked by Jackie
3. 1,508 views
The ratio of mystery books to the number of science fiction books is 4:3. The number of sci-fi books to the number of
1. 1 answer
2. asked by Ben
3. 1,505 views
The antifreeze in a car is a 50% by weight solution of ethylene glycol, C2H6O2 in a water solvent. Calculate the boiling point
1. 1 answer
2. asked by Christine
3. 1,494 views
A 980 N box has a mass of 100 kg. What is the acceleration of the box due to gravity?
1. 3 answers
2. asked by meme
3. 1,463 views
For a car travelling at a constant speed of 80km/h, the distance driven, d kilomtres, is represented by d(t)= 50t, where t is
1. 2 answers
2. asked by Anonymous
3. 1,444 views
A ball starts from rest and rolls down a hill with uniform acceleration, traveling 150 m during the second 5.0 s of its motion.
1. 1 answer
2. asked by Heather
3. 1,380 views
Fill in the blank with the right word(s)La reina y la princesa siempre :
1. 1 answer
2. asked by cheyenne
3. 1,293 views
Four identical metallic objects carry the following charges: +7.0 µC, +9.0 µC, -4.6 µC, and -1.2 µC. The objects are brought
1. 2 answers
2. asked by Elizabeth
3. 1,284 views
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the
1. 1 answer
2. asked by Raphael
3. 1,269 views
angle ABC and DEF are supplementary angles. the measure of DEF is 20 degrees less than 3 times the amount of ABC. what are ABC
1. 0 answers
2. asked by hunter
3. 1,252 views
Identical point charges of +2.1 ìC are fixed to diagonally opposite corners of a square. A third charge is then fixed at the
1. 1 answer
2. asked by Amy
3. 1,245 views
A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm
1. 1 answer
2. asked by Mike
3. 1,237 views
A bag contains 12 slips of paper of the same size. Each slip has one number on it, 1-12. Find P(even number). Find P (a number
1. 1 answer
2. asked by Ricardo
3. 1,234 views
Given the following reaction:3 CaCl2 + 2 H3PO4 Ca3(PO4)2 + 6 HCl How many grams of H3PO4 are needed to react completely with
1. 3 answers
2. asked by Annie
3. 1,229 views
assume the substance has a half-life of 11 years and the initial amount is 126 grams.How much remains at the end of 8 years?
1. 1 answer
2. asked by Jackie
3. 1,214 views
If a 100.0 gram sample of a radioactive isotope goes through three half-lives, how much of the original radioactive isotope will
1. 2 answers
2. asked by OhSnap
3. 1,212 views
Suppose that you are evaluating two different alternatives. The inflated cost stream for alternative A is $8,000 for year 1,
1. 0 answers
2. asked by Ellis
3. 1,201 views
Can I Have An Example Of A Closed System??Please use easy words that I can understand, Im not that smart and i'm only in 7th
1. 3 answers
2. asked by PLEASEEEE
3. 1,166 views
Hobbies: A book club charges a membership fee of $20 and then $12 for each book purchased.a. Write and graph a function to
1. 1 answer
2. asked by Terri
3. 1,165 views
1. Chapter 7 of the Bankruptcy Act is designed to do which of the following?a. Protect shareholders against creditors. b.
1. 0 answers
2. asked by Jone
3. 1,158 views
Two observers are 200 feet apart,in line with a tree containing a birds nest.The anles of elevation to the birds nest are 30
1. 1 answer
2. asked by ian
3. 1,156 views
A college’s data about the incoming freshmen indicates that the mean of their high school GPAs was 3.4, with a standard
1. 0 answers
2. asked by Lissa
3. 1,149 views
1. Which one of the following is the most complete and accurate definition of fiber?A. A stringy substance from plants B. The
1. 2 answers
2. asked by caitlin
3. 1,148 views
Calculate the electric power which must be supplied to the filament of of a light bulb operating at 3000K. The total surface
1. 1 answer
2. asked by christ
3. 1,143 views
What mass of lead (II)chloride would precipitate if a solution containing 8,28 g of lead (II) ions(Pb2+) reacts with excess HCl?
1. 1 answer
2. asked by maria
3. 1,140 views
Six hundred ninety four thousandths is how much more than fifty seven thousndths? Write The answer in words
1. 1 answer
2. asked by Anonymous
3. 1,138 views
a) 1150 dollars invested at 9% annual interest rate (compounded yearly) orb) 1475 invested at 6% annual interest (compounded
1. 1 answer
2. asked by Jackie
3. 1,129 views
Calculate the area under the curve y=e^-x above the x axis on the interval [1, infinity).a. infinity b. 0 c. -1/e d. 1/e e. none
1. 1 answer
2. asked by Darren
3. 1,119 views
A 50.0 g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 17.0 m/s. A high-speed camera records this
1. 0 answers
2. asked by Robert
3. 1,115 views
Two charges are placed on the x axis. One of the charges (q1 = +9.3 µC) is at x1 = +3.4 cm and the other (q2 = -20 µC) is at
1. 0 answers
2. asked by Elizabeth
3. 1,104 views
What is the net force of a 5.0 N force and an 7.0 N force acting on an object for each of the following conditions?(a) The
1. 0 answers
2. asked by reda
3. 1,101 views
Evaluate (if possible) the function at the given values of the independent variable. Simplify the results. (If an answer is
1. 1 answer
2. asked by Jimmy
3. 1,085 views
Jennifer started with $50 in her savings account. Each week she withdrew $10. The amount of money in her savings account after x
1. 2 answers
2. asked by Sammy
3. 1,082 views
Tell how to make a 1 M solution of Mg3(PO4)2 and a 0.1 M solution of CaSO4.
1. 0 answers
2. asked by Shannon
3. 1,080 views
At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilomole of oxygen has a
1. 2 answers
2. asked by christ
3. 1,064 views
1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction:C4H9OH +
1. 1 answer
2. asked by wll.i.am
3. 1,060 views
Calculate the average translational kinetic energy of a nitrogen molecule at 27 degree celcius
1. 1 answer
2. asked by christ
3. 1,055 views
The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12
1. 1 answer
2. asked by Adrian
3. 1,040 views
Read the following sentences write whether each underlined clause is the main clause or a subordinate clauseWhat's the
1. 2 answers
2. asked by Jerald
3. 1,029 views
need help please. I answered (c)incorrectly.Chantal and Julia ride horses in the same race. Chantal's horse finishes in one
1. 1 answer
2. asked by Chris - Ms Sue please
3. 1,025 views
Your friend of mass 150 can just barely float in fresh water. Find her volume.
1. 1 answer
2. asked by Kathy
3. 1,021 views
Given the probability of rain on any given day in March is 1/5, find the probablity that: It rains on March 10 and 12, but not
1. 2 answers
2. asked by anoneemose
3. 1,021 views
What is the mole fraction of solute in a 3.26 m aqueous solution?
1. 1 answer
2. asked by Maria
3. 1,019 views
I must combine the following sentences in the most effective way. Is my answer correct?1. Walter loved animals. 2. He especially
1. 1 answer
2. asked by M
3. 1,005 views
An asteroid in an elliptical orbit about the sun travels at 3.9 106 m/s at perihelion (the point of closest approach) at a
1. 0 answers
2. asked by ahmed
3. 1,004 views
A block with mass = 5.0 rests on a frictionless table and is attached by a horizontal spring ( = 130 ) to a wall. A second
1. 2 answers
2. asked by victor
3. 995 views
Working with linear equations:3(2x+1) - 4 (x+2) = 9
1. 2 answers
2. asked by John
3. 995 views
When the resistors are connected in series to a 12.0-V battery, the current from the battery is 1.73 A. When the resistors are
1. 2 answers
2. asked by PLEASE HELP
3. 991 views
Mason lifts a box off the ground and places it in a car that is 0.50 meters high. If he applies a force of 8.0 newtons to lift
1. 1 answer
2. asked by Candice
3. 985 views
50N 6kg - 2N
1. 1 answer
2. asked by meme
3. 974 views
what are the constitutional requiremnets for the inaugurationand memeorablr facts from past inauguration
1. 1 answer
2. asked by Anonymous
3. 972 views

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