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2012
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Questions Asked on February 20, 2012

Express the concentration of a 0.0510 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume
1. 2 answers
2. asked by Joy
3. 22,429 views
1. Which of the following is an advantage of using credit cards? (Points : 1)Credit card accounts charge monthly interest. It is
1. 3 answers
2. asked by josh patterson
3. 11,822 views
WHAT IS THE CRUDE PRODUCT IN RECRYSTALLIZATION?
1. 2 answers
2. asked by lou
3. 8,040 views
1. While riding on an elevator descending with a constant speed of 1.5 m/s, you accidentally drop a book form under your arm.(a)
1. 2 answers
2. asked by Priscilla
3. 6,912 views
A 24 foot ladder forms a 76 degree angle with the ground. The top of the ladder rests against the building. To the nearest inch
1. 4 answers
2. asked by jill
3. 5,725 views
The Oliver Company plans to market a new product. Based on its market studies, Oliver estimates that it can sell up to 4,500
1. 4 answers
2. asked by Rick
3. 5,242 views
A regular triangular pyramid has an altitude of 9m and a volume of 46.8cu. meters. Find the length of the edges and the lateral
1. 2 answers
2. asked by kitOy
3. 4,583 views
Some biologists model the number of species S in a fixed area A (such as an island) by the species-area relationshiplog S = log
1. 2 answers
2. asked by melek
3. 3,669 views
Which statement is contrapositive of the conditional: If a triangle is isosceles, then it has 2 congruent sides.1. If a triangle
1. 2 answers
2. asked by Tyler
3. 3,593 views
How can you use subtraction to complete an addition pattern? use this exercise as an example: 32, 39, 46, 53, 60, 67.
1. 7 answers
2. asked by jess
3. 3,363 views
The decomposition of an aldehyde solution in carbon tetrachloride is a first order reaction with a rate constant of 1.20 x 10-3
1. 1 answer
2. asked by Hannah
3. 3,118 views
An electronic store receives a shipment of 30 graphing calculators, including 6 that are defective. Four of these calculators
1. 2 answers
2. asked by Oshurbekova
3. 3,076 views
A 2490 kg demolition ball swings at the end of a 35.9 m cable on the arc of a vertical circle. At the lowest point of the swing,
1. 1 answer
2. asked by Shelby
3. 3,065 views
Are these two triangles similar? How do you know?There are two triangles HMG and JMK They are connected at the top point at M H
1. 2 answers
2. asked by Megan
3. 2,961 views
How much HCO2H is obtained by reacting 3.0g of FeS, 1.60g H2S, and 1.60g CO2 if the reaction results in a 47.0% yield?I know
1. 1 answer
2. asked by Stephanie
3. 2,891 views
if integral of 2 to -2 (x^7+k)dx=16, then k=a)-12 b)12 c)-4 d)4 e)0
1. 2 answers
2. asked by illiana
3. 2,887 views
Bauxite ore contains aluminum oxide Al2O3(s) which is decomposed using electricity to produce aluminum metal and oxygen gas.
1. 2 answers
2. asked by Hannah
3. 2,863 views
A 67.7 kg person jumps from rest off a 3.11 m-high tower straight down into the water. Neglect air resistance during the
1. 2 answers
2. asked by Joe
3. 2,769 views
Please help. The scale factor of ^RST to ^DEC is 3:13. What is the scale factor of ^DEC to ^RST?
1. 2 answers
2. asked by myles
3. 2,760 views
You have two gas-filled balloons, one containing He and the other H2. The H2 balloon is twice the size of the He balloon (let
1. 4 answers
2. asked by Bria
3. 2,750 views
How many iron atoms are in 0.32 mol of Fe2O3
1. 2 answers
2. asked by Ana
3. 2,407 views
Combinations of some type of designs or styles.A. Structures B. Patterns C. Numbers D. Conjectures B
1. 2 answers
2. asked by kesha
3. 2,404 views
Assume that the coin is flipped 10 times.What is the probability that both heads and tails occur?
1. 2 answers
2. asked by victoria
3. 2,391 views
A computer is reading data from a rotating CD-ROM. At a point that is 0.0368 m from the center of the disk, the centripetal
1. 1 answer
2. asked by Alex
3. 2,386 views
the point (1,9) lies on the graph of an equation y=f(x) for which dy/dx=4x(sqrt(y)) where x is greater than or equal to 0 and y
1. 1 answer
2. asked by victoria
3. 2,338 views
The average (mean) value of (1/x) over the interval 1<= x<= e isa)1 b)(1/e) c)(1/e^2)-1 d)(1+e)/2 e) 1/(e-1)
1. 1 answer
2. asked by illiana
3. 2,263 views
Determine wether the two expressions are equivalent. If so,tell what property is applied. If not explain why.1) 9 x 1 and 9. Is
1. 4 answers
2. asked by Phoebe
3. 2,133 views
A penny is placed at the outer edge of a disk (radius = 0.159 m) that rotates about an axis perpendicular to the plane of the
1. 3 answers
2. asked by Jessica
3. 2,114 views
An architect is designing a small A-frame cottage for a new resort area. A cross section of the cottage is an isosceles triangle
1. 2 answers
2. asked by TY
3. 2,104 views
Simplify #1:cscx(sin^2x+cos^2xtanx)/sinx+cosx = cscx((1)tanx)/sinx+cosx = cscxtanx/sinx+cosx Is the correct answer
1. 4 answers
2. asked by Anonymous
3. 1,968 views
A roller coaster moves 200 ft horizontally and then rises 135 ft at an angle of 30 degrees above the horizontal. Next, it
1. 1 answer
2. asked by Hunter
3. 1,926 views
The initial concentration of a reactant in a first order reaction is 0.620 molar. What will be its concentration after 3
1. 2 answers
2. asked by Hannah
3. 1,901 views
The mass of a single uranium atom is 4.70E-22 grams. How many uranium atoms would there be in 339 milligrams of uranium?
1. 1 answer
2. asked by pa
3. 1,882 views
Anne and Nancy use a metal alloy that is 23.5% copper to make jewelry. How many ounces of a21% alloy must be mixed with a 30%
1. 1 answer
2. asked by sakena
3. 1,798 views
The minute hand of a clock is 6 inches long. What distance does its tip move in 16 minutes?
1. 3 answers
2. asked by tim
3. 1,794 views
Triangle ABC has side lengths 7, 24, and 25. Do the side lengths form a Pythagorean triple? Explain.Thank You so much! :) I'm
1. 2 answers
2. asked by Amaya
3. 1,778 views
I need some help with some of these questions:The action of bacteria on meat and fish produces a poisonous compound called
1. 1 answer
2. asked by Matthew
3. 1,740 views
Suppose that n tennis players want to play an elimination tournament. That means: they pair up, at random, for each round; if
1. 1 answer
2. asked by Hi
3. 1,675 views
If EF=3x-10, FG=2x-15 and EG=20, find the value of x, EF and FG.
1. 2 answers
2. asked by Tyler
3. 1,642 views
What is the universal truth in "Oedipus the King"?
1. 4 answers
2. asked by Rebecca
3. 1,630 views
2C10H22 + 31O2 = 20Co2 + 22H2O What kind of reaction is this?
1. 2 answers
2. asked by Isabella
3. 1,578 views
A satellite 200 miles above the earth is orbiting the earth once every 6 hours. How long, in hours, does it take the satellite
1. 2 answers
2. asked by Anonymous
3. 1,499 views
Please Help. MNOP~Qrst with a scale factor of 5:4. MP=85mm. What is the value of QT?
1. 1 answer
2. asked by myles
3. 1,483 views
At about 51.2 meters/sec, a falling parachuter (before the parachute opens) no longer accelerates. Air friction opposes
1. 1 answer
2. asked by Anonymous
3. 1,477 views
Acceptance, Perception and ConclusionA. Customs B. Beliefs C. Traditions D. Rituals B
1. 1 answer
2. asked by kesha
3. 1,452 views
It must be nice," she said. "It must be very nice. I wish women could do such things.""It ain't the right kind of a life for a
1. 3 answers
2. asked by Jess
3. 1,421 views
The angle is less than 180 degrees, but more than 90 degrees.A. Obtuse angle B. Right Angle C. Acute Angle D. Triangle A
1. 3 answers
2. asked by kesha
3. 1,410 views
let f be the function given by f(x)=(3x^3/e^x). for what value of x is the slope of the line tangent to f equal to -1.024?a)-9.0
1. 1 answer
2. asked by victoria
3. 1,407 views
Calculate the number of molecules of NBr3 in 25.0 g NBr3. Use a molar mass with at least as many significant figures as the data
1. 1 answer
2. asked by Anonymous
3. 1,403 views
Simplify #1:cscx(sin^2x+cos^2xtanx)/sinx+cosx = cscx((1)tanx)/sinx+cosx = cscxtanx/sinx+cosx Is the correct answer
1. 1 answer
2. asked by Anonymous
3. 1,370 views
How many particles are in .169 moles of Potassium Sulfide?!What is the percent composition of sulfer in that same prolem?!
1. 2 answers
2. asked by Alison
3. 1,366 views
I had to perform an experiment for the freezing point depression in which we had to determine the frezzing points of water as a
1. 8 answers
2. asked by Hannah
3. 1,327 views
The remaining amount after deductions in salary.A. Gross B. Net C. Fiscal D. Tariff
1. 2 answers
2. asked by kesha
3. 1,302 views
Here is the second part of my summary I really need you to revise. Thank you.1) Details of the behaviour, clothes and so on of
1. 1 answer
2. asked by Henry2
3. 1,286 views
A diver has a mass of 75 kg takes part in a competition by having to perform 10 dives off the 10m platform above the water.
1. 1 answer
2. asked by william
3. 1,257 views
Carolyn and Kim are selling lemonade this summer. It costs $0.10 to make each cup of lemonade.  They are going to sell
1. 5 answers
2. asked by NINA
3. 1,226 views
A 2.5 kg block of ice at a temperature of 0C and an initial speed of 5.7 m/s slides across a level floor. If 3.3*10^5 J are
1. 1 answer
2. asked by Riley
3. 1,213 views
Predict the products of the following reactions.a)CH3-CH2-CH2-CH3+O2----> B)CH3-CH2-CH2-CH2-CH3+Br2---->
1. 0 answers
2. asked by April
3. 1,203 views
Basing the Results on ProbabilityA. Calculation B. Abstraction C. Classification D. Relation C
1. 2 answers
2. asked by kesha
3. 1,196 views
On Tuseday, Grace's Flower Shop sold 124 flowers. At the end of the day, there were 237 flowers left in the shop. What was the
1. 2 answers
2. asked by Anonymous
3. 1,181 views
Truth tables cana. display all the possible truth value involved with a set of sentences. b.determine what scientific claims are
1. 0 answers
2. asked by Mary
3. 1,173 views
A carnival swing is fixed on the end of an 7.6-m-long beam. If the swing and beam sweep through an angle of 130°, what is the
1. 0 answers
2. asked by jm
3. 1,169 views
The shares of a companyA. Stocks B. Bonds C. Executive D. Assistant I GOT A
1. 1 answer
2. asked by kesha
3. 1,165 views
A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally
1. 3 answers
2. asked by Patience
3. 1,165 views
Which compound is more polar: water or dicloromethane? I know that water is a polar molecule but I don't know the polarity of
1. 1 answer
2. asked by lara
3. 1,162 views
The program will accept user input to store the student's first and last name . If the name is ZZZ, then the program will end.Th
1. 2 answers
2. asked by jay
3. 1,156 views
Ba(NO3)2 is added (BaCrO4 (s) is less soluble than BaCr2O7 (S))provide an explanation Thank You
1. 4 answers
2. asked by Anonymous
3. 1,154 views
What is the mass of a person who weighs 750N?
1. 3 answers
2. asked by Jade
3. 1,139 views
I had to perform an experiment for the freezing point depression in which we had to determine the freezing points of water as a
1. 2 answers
2. asked by Hannah
3. 1,138 views
Need help solving for x:500,000/x = 30%/70%
1. 1 answer
2. asked by Guy
3. 1,136 views
The ratio of the volume to the lateral area of a right circular cone is 2:1. If the altitude is 15cm, what is the ratio of the
1. 0 answers
2. asked by kitOy
3. 1,126 views
An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return
1. 1 answer
2. asked by Anonymous
3. 1,121 views
A model for the length of daylight (in hours) in Philadelphia on the t th day of the year isL(t)= 12+2.8 sin[2pi/365(t-80)] Use
1. 1 answer
2. asked by Nurcan
3. 1,120 views
How does active transport differ from passivetransport? 1. Molecules move down a concentration gradient in active transport. 2.
1. 8 answers
2. asked by anmol
3. 1,112 views
An inverted square pyramid has a height equal to 8m and a top edge to 3m. Initially, it contains water to the depth of 5m.a.
1. 2 answers
2. asked by kitOy
3. 1,110 views
A solution is made by mixing equal masses of methanol, CH4O, and ethanol, C2H6O. Determine the mole fraction of each component
1. 1 answer
2. asked by Heather
3. 1,088 views
During a 5.00 s interval, a particle’scoordinates change from x =10.0 m, y =5.00 m to x =30.0 m, y = 5.00 m. Assuming the
1. 0 answers
2. asked by juan
3. 1,075 views
What are the various uses of radioactivity in healthcare? What are the future trends in healthcare with respect to the use of
1. 3 answers
2. asked by Nikki
3. 1,074 views
Most frog species have a distinct tadpole life stage. However, microhylids of Australia and New Guinea do not have a tadpole
1. 0 answers
2. asked by Connan
3. 1,073 views
Gymnast Clothing manufactures expensive soccer cleats for sale to college bookstores in runs of up to 500. Its cost (in dollars)
1. 0 answers
2. asked by Eric
3. 1,070 views
1. Find the expense at 60 cents a square foot of polishing the curved surface of a marble column in the shape of the frustum of
1. 0 answers
2. asked by kitOy
3. 1,070 views
How does the surface area-to-volume ratio ofa 1-mm cube compare to the surface area-to- volume ratio of a 3-mm cube? 1. The
1. 0 answers
2. asked by anmol
3. 1,068 views
Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One
1. 2 answers
2. asked by Anonymous
3. 1,064 views
While trace impurities of iron and chromium in natural corundum form the gemstones ruby and sapphire, they are basically a
1. 1 answer
2. asked by minnie
3. 1,052 views
The vapor pressure of chloroform is 173.11 mm Hg at 25 degrees celsius. A nonvolatile, nonelectrolyte that dissolves in
1. 2 answers
2. asked by Hannah
3. 1,052 views
I urgently need to check this paragraph. Can you help me, Writeacher?1) St. Valentine's Day is the feast's day of the Patron
1. 1 answer
2. asked by Henry2
3. 1,037 views
Carolyn and Kim are selling lemonade this summer. It costs $0.10 to make each cup of lemonade.  They are going to sell
1. 3 answers
2. asked by NINA
3. 1,031 views
Your company uses 1,500 per year of a certain subassembly that has an annual holding cost of $45 per unit. Each order placed
1. 0 answers
2. asked by JeannieC
3. 1,029 views
When an air capacitor with a capacitance of 380 nF (1 {\rm nF} = 10^{-9}\;{\rm F}) is connected to a power supply, the energy
1. 3 answers
2. asked by Robert Soos
3. 1,029 views
On June 9, 1988, Sergei Bubka broke the world pole-vaulting record for the 8th time in four years by attaining a height of 6.14
1. 1 answer
2. asked by Anonymous
3. 1,016 views
A result from being multipliedA. Product B. Quotient C. Multiplier D. Expression I THINK ITS B R C
1. 6 answers
2. asked by kesha
3. 1,011 views
y= sin x/2, 0 less than equal to x less than equal to 4pi... the question says state the amplitude and period for each equation
1. 1 answer
2. asked by jim
3. 1,011 views
Many people mistakenly believe that the astronauts who orbit the Earth are "above gravity." Calculate g for space shuttle
1. 3 answers
2. asked by JARED
3. 980 views
1. Activation-synthesis dream theory purports that dreams result from the brain's effort to make sense of:a. the days activities
1. 1 answer
2. asked by Tubbz
3. 975 views
Calucluate the pH of 100 mL of buffer that is 0.075 M NH4Cl and 0.175 M NH3 before and after the addition of 1.00 mL of 5.05 M
1. 1 answer
2. asked by Katie
3. 972 views
Identify and analyze the different crimes for which students are most at risk for in K-12, include some of the differences in
1. 1 answer
2. asked by sharday
3. 972 views
Which of the following leads to the deepest appreciation of a film?Turning off your brain completely and letting life’s
1. 2 answers
2. asked by kim
3. 971 views
A midpoint of sequence of numbers.A. Mean B. Median C. Mode D. Zero I GOT B
1. 1 answer
2. asked by kesha
3. 961 views
how would I illustrate the ninth amendment?
1. 7 answers
2. asked by SoccerStar
3. 947 views
I need some help with some of these questions:The action of bacteria on meat and fish produces a poisonous compound called
1. 1 answer
2. asked by Matthew
3. 945 views

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