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2013
January
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
40 answers
asked by
Deborah
17,663 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 answer
asked by
Phil
12,113 views
how do owners of large estates spend their time.
17 answers
asked by
Richie6501
9,633 views
A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?
2 answers
asked by
Vic
9,226 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 answer
asked by
Jackie
8,068 views
What kind of map could you use to show information about a city?
-a relief map -a population density map -a political boundary
9 answers
asked by
Anon
7,339 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
4 answers
asked by
gabriella
5,977 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.
9 answers
asked by
Shreya
5,637 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 answer
asked by
Ryan
5,540 views
For melting point determination, what is the optimum rate of heating near the melting point? What are the problems, if the rate
5 answers
asked by
Sunday
4,925 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 answer
asked by
Dan
4,260 views
permuations
an orchestra has 2 violinsts, 2 cellisst, and 4 harpists. Assume that the players of each instrument have to sit
3 answers
asked by
Shreya
4,073 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 answer
asked by
lee
3,612 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 ×
3 answers
asked by
Deborah
3,377 views
Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10-59, and dissociates according to
Ca10(PO4)6(OH)2(
2 answers
asked by
Angelyka
3,339 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
4 answers
asked by
Anonymous
3,207 views
Two resistors have resistances R(smaller) and R(larger), where R(smaller) < R(larger). When the resistors are connected in
1 answer
asked by
PLEASE HELP
3,205 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 answer
asked by
Amy
2,986 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 answer
asked by
Nathan
2,815 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
2 answers
asked by
Anonymous
2,739 views
You split $1500 between two savings accounts. Account A pays annual 5% interest and Account B pays 4% annual interest. After one
2 answers
asked by
em
2,726 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
6 answers
asked by
Mary
2,683 views
two sides of a rectangle differ by 3.5cm.find the dimentions of the rectangles if its perimeter is 67cm?
3 answers
asked by
samin
2,649 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
2 answers
asked by
Stanley
2,498 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
3 answers
asked by
Naibe
2,383 views
An electric kettle contains 1.5 kg of water at
100o C and powered by a 2.0 kW electric element. If the thermostat of the kettle
2 answers
asked by
christ
2,372 views
What is the mass in kg of a 3920 N piano?
4 answers
asked by
meme
2,279 views
let f(x)=(x^2+2x-15)/(3x^2+12x-15)
Find the horizontal and vertical asymptotes of f(x).
3 answers
asked by
Anonymous
2,234 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 answer
asked by
Jackie
2,130 views
Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the
1 answer
asked by
Stacia
2,119 views
what is the [OH-] in a solution that contains 0.225g of NaOH in 0.250 L of solution
1 answer
asked by
sofia
2,097 views
Write 5.62*10^5 in standard form
3 answers
asked by
marie
2,085 views
In the balanced double replacement reaction of calcium chloride CaCl2 and aluminum sulfate Al2(SO4)3, how many grams of calcium
7 answers
asked by
thad
2,055 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 answer
asked by
Anonymous
2,009 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 answer
asked by
Kiana
1,887 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 answer
asked by
Jenessa Currie
1,756 views
Which of the following is NOT a characteristic that all organisms share?
Select one: a. ability to taste and smell b. ability to
5 answers
asked by
Anonymous
1,752 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
5 answers
asked by
xavier
1,727 views
how do owners of large estates spend their time
4 answers
asked by
Richie6501
1,721 views
A version of the Two-Transversal Proportionality Corollary states, "If three or more parallel lines intersect two transversals,
2 answers
asked by
jesus
1,679 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
3 answers
asked by
Karen
1,649 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 answer
asked by
Anonymous
1,631 views
Find the area of the following circle.
r = 9 yd.
3 answers
asked by
johnny
1,621 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 answer
asked by
Jasmine
1,615 views
If a farm as 13 heads and 36 feet. How many chicken are there and how many rabbit are there?
1 answer
asked by
tom
1,586 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 answer
asked by
Physics fail
1,567 views
Suppose that the annual interest rate on your checking account is 7.5 percent compounded continuously. In order to have $ 6300
1 answer
asked by
Jackie
1,522 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 answer
asked by
bliss
1,498 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 answer
asked by
Sophia
1,486 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 answer
asked by
Ben
1,485 views
An innovative rural public health program is reducing infant mortality in a certain West African country. Pretend the program in
1 answer
asked by
Jackie
1,484 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 answer
asked by
Christine
1,483 views
A 980 N box has a mass of 100 kg. What is the acceleration of the box due to gravity?
3 answers
asked by
meme
1,454 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
2 answers
asked by
Anonymous
1,429 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 answer
asked by
Heather
1,366 views
Fill in the blank with the right word(s)
La reina y la princesa siempre :
1 answer
asked by
cheyenne
1,283 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
2 answers
asked by
Elizabeth
1,262 views
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the
1 answer
asked by
Raphael
1,244 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
0 answers
asked by
hunter
1,239 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 answer
asked by
Mike
1,223 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 answer
asked by
Amy
1,216 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
3 answers
asked by
Annie
1,215 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 answer
asked by
Ricardo
1,210 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 answer
asked by
Jackie
1,199 views
Suppose that you are evaluating two different alternatives. The inflated cost stream for alternative A is $8,000 for year 1,
0 answers
asked by
Ellis
1,189 views
If a 100.0 gram sample of a radioactive isotope goes through three half-lives, how much of the original radioactive isotope will
2 answers
asked by
OhSnap
1,187 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 answer
asked by
ian
1,151 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
3 answers
asked by
PLEASEEEE
1,150 views
1. Chapter 7 of the Bankruptcy Act is designed to do which of the following?
a. Protect shareholders against creditors. b.
0 answers
asked by
Jone
1,148 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 answer
asked by
Terri
1,145 views
A college’s data about the incoming freshmen indicates that the mean of their high school GPAs was 3.4, with a standard
0 answers
asked by
Lissa
1,137 views
1. Which one of the following is the most complete and accurate definition of fiber?
A. A stringy substance from plants B. The
2 answers
asked by
caitlin
1,133 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 answer
asked by
maria
1,127 views
Six hundred ninety four thousandths is how much more than fifty seven thousndths? Write The answer in words
1 answer
asked by
Anonymous
1,125 views
Calculate the electric power which must be supplied to the filament of of a light bulb operating at 3000K. The total surface
1 answer
asked by
christ
1,121 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 answer
asked by
Darren
1,107 views
a) 1150 dollars invested at 9% annual interest rate (compounded yearly) or
b) 1475 invested at 6% annual interest (compounded
1 answer
asked by
Jackie
1,105 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
0 answers
asked by
Robert
1,096 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
0 answers
asked by
Elizabeth
1,096 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
0 answers
asked by
reda
1,091 views
Tell how to make a 1 M solution of Mg3(PO4)2 and a 0.1 M solution of CaSO4.
0 answers
asked by
Shannon
1,067 views
Evaluate (if possible) the function at the given values of the independent variable. Simplify the results. (If an answer is
1 answer
asked by
Jimmy
1,065 views
Jennifer started with $50 in her savings account. Each week she withdrew $10. The amount of money in her savings account after x
2 answers
asked by
Sammy
1,063 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
2 answers
asked by
christ
1,042 views
1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction:
C4H9OH +
1 answer
asked by
wll.i.am
1,037 views
Calculate the average translational kinetic energy of a nitrogen molecule at 27 degree celcius
1 answer
asked by
christ
1,035 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 answer
asked by
Adrian
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 answer
asked by
Chris - Ms Sue please
1,009 views
Your friend of mass 150 can just barely float in fresh water. Find her volume.
1 answer
asked by
Kathy
1,008 views
Read the following sentences write whether each underlined clause is the main clause or a subordinate clause
What's the
2 answers
asked by
Jerald
1,004 views
What is the mole fraction of solute in a 3.26 m aqueous solution?
1 answer
asked by
Maria
998 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
2 answers
asked by
anoneemose
997 views
I must combine the following sentences in the most effective way. Is my answer correct?
1. Walter loved animals. 2. He especially
1 answer
asked by
M
996 views
Working with linear equations:
3(2x+1) - 4 (x+2) = 9
2 answers
asked by
John
989 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
0 answers
asked by
ahmed
987 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 answer
asked by
Candice
972 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
2 answers
asked by
victor
968 views
50N 6kg - 2N
1 answer
asked by
meme
966 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
2 answers
asked by
PLEASE HELP
964 views
what are the constitutional requiremnets for the inauguration
and memeorablr facts from past inauguration
1 answer
asked by
Anonymous
962 views
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