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Questions Asked on December 15, 2010

Two positive numbers have a sum of 60. what is the maximum product of one number times the square of the second number?a) 3481
1. 1 answer
2. asked by Jenny
3. 10,803 views
20 kg , 30 cm diameter disk is spinning at 300 rpm. How much friction force must be applied to rim to bring the disk to a halt
1. 4 answers
2. asked by Justin
3. 7,483 views
A rectangle is inscribed between the parabolas y=4x^2 and y=30-x^2. what is the maximum area of such a rectangle?a)20root2 b)40
1. 3 answers
2. asked by Jim
3. 6,124 views
Write the converse, inverse, and contrapositive of the conditional statement. If an animal is a bird, then it has two eyes.
1. 3 answers
2. asked by Kaylaa
3. 5,654 views
Given the reaction:C8H16 + 12O2 --> 8CO2 + 8H2O How many moles of H2O are produced when 11.2 liters of C8H16 gas, measured at
1. 4 answers
2. asked by Lori
3. 5,323 views
Which of the following solutions would require the greatest volume of 1.0M NaOH for complete neturalization?a)10.0ml of 1.0M HCl
1. 3 answers
2. asked by Chels
3. 4,257 views
What is the percent by mass of glucose in a solution containing 0.15 moles of glucose dissolved in 410g acetic acid? The molar
1. 2 answers
2. asked by Lauren smith
3. 3,567 views
3CO(g)+ Fe2O3(s) --> 2Fe(s) + 3CO2(g) + 24.7 kJ. How much heat is released when 56 grams of CO react?
1. 1 answer
2. asked by Hannah
3. 3,494 views
2. A heavy box is pulled across a wooden floor with a rope. The rope forms an angle of 60.0°with the floor. A tension of 80.0°
1. 1 answer
2. asked by Anonymous
3. 3,383 views
For the reaction:2H+(aq) + CO3-2(aq) --> CO2(g) + H2O(l) A. Calculate the deltaHºrxn for the reaction. Given deltaHºf for
1. 1 answer
2. asked by Millie
3. 3,262 views
How many grams of water at 0 degrees C can be frozen into ice at 0 degrees C if 55.0 kJ of heat is removed? delta Hsolid= -6.01
1. 1 answer
2. asked by Hannah
3. 3,240 views
a continuous function f has domain (1,25) and range (3,30). if f'(x) is less than 0 for all x between 1 and 25, what is f(25)?a)
1. 1 answer
2. asked by Stanley
3. 3,209 views
How long would it take a kettle with a 1kW heating element to heat 1 litre of water?Watts = Joules / second • Mass of 1 litre
1. 2 answers
2. asked by Paul
3. 3,168 views
Consider the following unbalanced equation: C2H5OH(g) + O2(g) → CO2(g) + H2O(l)1.55 g of ethanol reacts with 10.0 g of oxygen.
1. 3 answers
2. asked by Bogdanam
3. 3,155 views
The molar heat of solution of NH4NO3 is 25.7 kJ/mol. How much heat (in kJ) would be required to dissolve 20 grams of NH4NO3 in
1. 2 answers
2. asked by Hannah
3. 2,874 views
What is the percent by mass of oxygen in Al2O3?
1. 2 answers
2. asked by Lori
3. 2,612 views
Suppose that a simple pendulum consists of a small 66.0 g bob at the end of a cord of negligible mass. Suppose that the angle
1. 8 answers
2. asked by Robert C
3. 2,513 views
suppose you have an outdoor pool measuring 25ft by 10ft. you want to add a cement walkway around the pool. if the walkway will
1. 6 answers
2. asked by arianna
3. 2,439 views
15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.22 M lead(II) nitrate solution. What is the concentration
1. 2 answers
2. asked by Bogdanam
3. 2,320 views
How much heat is required to convert 9 grams of water at 100 degrees C into steam at 100 degrees C. Hvap for water = 40.7 kJ/mol
1. 1 answer
2. asked by Hannah
3. 2,121 views
Given Isosceles trapezoid ABCD. AB = 3x - 4 and CD = x + 12. Find AB.Isosceles trapezoid A B C D is drawn. 2 8 16 20
1. 1 answer
2. asked by cc
3. 2,116 views
If the linearization of y= cube root of x at x=64 is used to approximate cube root of 66, what is the percentage error?a) .01%
1. 1 answer
2. asked by Sandy
3. 2,106 views
A friend throws a baseball horizontally. He releases it at a height of 2.0 m and it lands 21 m from his front foot, which is
1. 4 answers
2. asked by molly schwalje
3. 2,084 views
what is the total number of joules released when a 5.00 gram sample of water changes from liquid to gas at 100 degrees Celsius?
1. 1 answer
2. asked by Help
3. 2,078 views
find the value of the variable and LN if M is between L and N.LM=8a, MN=11a, LM=24
1. 2 answers
2. asked by julie
3. 2,057 views
The heat of combustion of bituminous coal is 2.50 × 104 J/g. What quantity of the coal is required to produce the energy to
1. 2 answers
2. asked by Bogdanam
3. 1,874 views
What would be the weight of a 1.0kg mass on the surface of Mars? The mass of Mars is 0.11 that of the earth, and its radius is
1. 1 answer
2. asked by Universal Gravitation
3. 1,675 views
Calcium carbonate reacts w/stomach acid according to the following chemical equation.CaCO3+2HCl(aq)-> CaCl2(aq)+H2O(l)+CO2(g) A.
1. 1 answer
2. asked by Tony
3. 1,644 views
A 52 kg skier is at the top of a slope, as in thefigure. At the initial point A, the skier is 17.7 m vertically above the final
1. 1 answer
2. asked by carlos
3. 1,575 views
Four particles in the xy plane have the following masses and coordinates: 1 kg at (4 m, 4 m), 2 kg at (−3 m, 5 m), 3 kg at (5
1. 1 answer
2. asked by applebottom
3. 1,484 views
The four quantum numbers for the last electron placed in the orbitals of a certain element are: n=3 l=2 m of l=0 and m of
1. 2 answers
2. asked by Brittany
3. 1,480 views
Si(s)+ 2Cl2(g) --> SiCl2(g) --> SiCl2(l) + 687 kJ. How much heat is produced when 106 grams of Cl2 react?
1. 1 answer
2. asked by Hannah
3. 1,478 views
A beam of particles have a measured life time of 1.5 x 10-8 s when traveling 2.0 x 108 m/s. What would their lifetime be if they
1. 3 answers
2. asked by Ann
3. 1,449 views
A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate
1. 4 answers
2. asked by kevin giordano
3. 1,428 views
Kevin has $6.45 in coins in his cash box. The numbers of quarters is one less than twice the number of dimes. The number of
1. 3 answers
2. asked by JJ
3. 1,382 views
If y= tanx, x=pi, and dx= .5, what does dy equal?a)-.25 b) -.5 c) 0 d).5 e).25
1. 1 answer
2. asked by Pam
3. 1,365 views
A gas has a volume of 1,400 milliliters at a temperature of 20.0 K and a pressure of 101.3 kPa. What will be the volume when the
1. 1 answer
2. asked by Haley
3. 1,362 views
A student mixes two water solutions with an initial temperature of 25 degrees C to form a final substance with a mass of 65
1. 1 answer
2. asked by Hannah
3. 1,354 views
107 total foreign language students42 take spanish 46 take french 45 take german 8 take spanish & french but not german 6 take
1. 1 answer
2. asked by Kelly
3. 1,317 views
A punter's first four punts in a football game are 30 yds, 20 yds, 27 yds, and 29 yds. After a fifth punt, the punter's mean was
1. 2 answers
2. asked by Jen
3. 1,299 views
calculate the pH of a 1.94M solution of nitrous acid (HNO2 - ka = 4.5E-4).
1. 2 answers
2. asked by Tara
3. 1,289 views
A sample containing 1.2x10^-2 mol HCl is completely neutralized by 100.0mL of Sr(OH)2 what is the [Sr(OH)2]?
1. 1 answer
2. asked by Anonymous
3. 1,246 views
if u and v are differentiable functions, then does d(uv) = dudv
1. 1 answer
2. asked by Frank
3. 1,240 views
C6H8O7 + 3NaOH --> NaC6H5O7 + 3H2O
1. 2 answers
2. asked by ronald
3. 1,213 views
10.2 g of Pb(NO3)2 are dissolved in 100 mL of water, and added to 250.0 mL of a 0.250 M solution of KI. Determine the mass in
1. 1 answer
2. asked by jenni
3. 1,204 views
the ionization energy for atomic hydrogen is 1.31x10^6 J/mol. what is the ionization energy for He^+
1. 1 answer
2. asked by kate
3. 1,199 views
Apart from the composition of the rock itself, what climate do you imagine is more conducive to physical weathering? and
1. 3 answers
2. asked by m
3. 1,195 views
methane which is composed of carbon and hydrogen, lacks fuctional groups and is a gas at room temperature.upon replacing one of
1. 0 answers
2. asked by erika
3. 1,194 views
Posted by Lori on Tuesday, December 14, 2010 at 5:38pm.The mole fraction of an aqueous solution of potassium perchlorate is
1. 1 answer
2. asked by Lori
3. 1,184 views
Find d^2y/dx^2 by implicit differentiation.x^(1/3) + y^(1/3) = 4 I know that first you must find the 1st derivative & for y
1. 1 answer
2. asked by Liz
3. 1,171 views
Determine how many milliliters of 0.448 M HClO4 will be required to neutralize 38.30 g Ca(OH)2 according to the reaction:
1. 1 answer
2. asked by Anonymous
3. 1,158 views
a 15-gram sample of a gas has a volume of 30 liters at standard pressure. what is the densty of the gas
1. 1 answer
2. asked by pita
3. 1,157 views
A ferris wheel, radius 5.0m, rotates once every 8.4 seconds.a) What is the centripetal acceleration of a 60kg person at the
1. 3 answers
2. asked by Jon
3. 1,154 views
A 55 kg skier rests on a hill that has an angle of 25° to the horizontal. What is the magnitude of the normal force the hill
1. 2 answers
2. asked by Dawn
3. 1,145 views
When an electric discharge is passed through boron trichloride a new compound is formed. what is its simplest formula if on
1. 1 answer
2. asked by christine
3. 1,133 views
can anyone explain how to divide in algebra? I have this problem:(15x2-24+9)/(3x-3) I am not looking for someone to give me the
1. 2 answers
2. asked by trina
3. 1,114 views
Find the volume of the solid obtained by rotating the region bounded by the given curves about the line x=-3 y=x^2, x=y^2
1. 0 answers
2. asked by Anonymous
3. 1,112 views
When NH3(aq) is added to Cu^2+ (aq) a precipitate initially forms. what is its formula?
1. 1 answer
2. asked by josh
3. 1,105 views
Translate to an equation:r $2 roses and t $2.50 tulips total $30 graph the equation and use the graph to determie three
1. 1 answer
2. asked by Kristie
3. 1,103 views
1250 wordsPrepare a financial overview for your global venture (Sugar / Mexico). Include a chart that represents the general
1. 4 answers
2. asked by lila
3. 1,101 views
Find the area bounded by the parabola y^2=4x and the line y=2x-4. Use vertical representative rectangles (integrate with respect
1. 0 answers
2. asked by Ashton
3. 1,076 views
There are a total of 107 foreign language students in a high school where they offer only Spanish, French, and German. 42 take
1. 5 answers
2. asked by Christy
3. 1,075 views
A boat's crew rowed 13.5 miles downstream, with the current, in 1.5 hours. The return trip upstream against the current covered
1. 1 answer
2. asked by tiara
3. 1,046 views
a pine tree casts a shadow that is 7.9 feet long when the sun is 80 degrees above the horizonfind the height of the tree
1. 2 answers
2. asked by Katelynn
3. 1,026 views
Predict qualitatively whether the salts below dissolve to give solutions that are acidic, basic or neutral.what is the rule for
1. 1 answer
2. asked by Lisa
3. 1,020 views
Losing your bags during airline travel is not all that uncommon. Recently, an airline was cited for losing customers' baggage 8%
1. 1 answer
2. asked by Ted
3. 1,000 views
an electron in a one-dimensional box requires photons with a wavelength 8080 nm to excite it from the n=2 energy level to the
1. 2 answers
2. asked by erica
3. 994 views
What is the variable being tested in an experiment called?
1. 2 answers
2. asked by Bekah
3. 986 views
one plane at 520 feet is ascending at the rate of 40 ft per minute, while another plane at 3800 ft isdescending at the rate of
1. 1 answer
2. asked by Anonymous
3. 982 views
what is the gram molecular mass of the compound with the formula CH3COOH ?(1)22.4 g (2)44.0 g (3)48.0 g (4)60.0 g
1. 1 answer
2. asked by Anonymous
3. 978 views
which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions
1. 0 answers
2. asked by smith
3. 922 views
A projectile fired vertically up from a cannon rises 200 m before returning to the ground. If the same cannon were to fire the
1. 2 answers
2. asked by mc
3. 919 views
Consider two vectors where F1 = 45 N, F2 = 63 N, and \theta _{1} = 240o and \theta _{2} = 25o, measured from the positive x-axis
1. 1 answer
2. asked by asdas
3. 891 views
what are the difference between the traditional and the new economy goal to promote development in deloping nations?
1. 1 answer
2. asked by katelyn
3. 887 views
The four quantum numbers for the last electron placed in the orbitals of a certain element are: n=3 l=2 m of l=0 and m of
1. 2 answers
2. asked by Brittany
3. 883 views
Suppose that the U.S. Senate consisted of 57 Republican and 43 Democratic Senators. How many different 12-person committees
1. 3 answers
2. asked by Rena
3. 883 views
Find the area bounded by the parabola y^2=4x and the line y=2x-4. Use vertical representative rectangles (integrate with respect
1. 3 answers
2. asked by ashton
3. 882 views
the assumptions for using a chi-square test. Research articles provide practical examples from the research to support your
1. 1 answer
2. asked by smith
3. 859 views
how arithmetic and geometric progression can be used to solve problems related to banking business?
1. 0 answers
2. asked by kulwa
3. 849 views
a girl lifts a 100 N load a height of 2.0 m in a time of 0.5 s. what power does the girl produce?
1. 2 answers
2. asked by Anonymous
3. 837 views
2H2(g) + O2(g) = 2H2O (l)Calculate the volume of Hydrogen gas at STP required to produce an amount of energy equivalent to that
1. 3 answers
2. asked by alex
3. 836 views
A particle is moving around the unit circle (the circle of radius 1 centered at the origin). At the point (.6, .8) the particle
1. 1 answer
2. asked by Jeff
3. 824 views
A man is planning to invest up to $22,000in bank X or bank Y or both. He wants to invest at least $2,000 but no more than
1. 0 answers
2. asked by Kelsie
3. 817 views
how do you put 7/16, 5/8, and 3/4 in order from greatest to least
1. 4 answers
2. asked by lexi
3. 816 views
what are the symmetry properties of a regular octahedron and a cube?
1. 1 answer
2. asked by m
3. 807 views
why is it important to considereach domain in the study of adult development?
1. 1 answer
2. asked by Randy
3. 804 views
Nic has a revolving dept store credit card account with rate 15%annually. Lastmonth balance on the account was $423.78. During
1. 0 answers
2. asked by Marcy
3. 803 views
I need a creative title for a lab report that deals with using dalton's partial pressure law in order to determine the amount of
1. 1 answer
2. asked by Jacob
3. 801 views
Suppose you are managing 25 employees, and you need to form three teams to work on three different projects.Assume that all
1. 2 answers
2. asked by David
3. 799 views
How would the cell theory be affected if scientists could make living cells from carbon, oxygen, and other elements found on
1. 0 answers
2. asked by Alyssa
3. 791 views
The empirical formula of a compound is CH2O and the molecular mass is 180. What is the molecular formula of the compound?
1. 1 answer
2. asked by Haley
3. 785 views
What is the distance from the origin to the point (14,11)?
1. 1 answer
2. asked by Ashley
3. 780 views
The titration of 25.00mL of Ba(OH)2 solution with an aqueous solution of 0.500 M HCl reaches an end point when 30.20 mL of the
1. 3 answers
2. asked by LISA
3. 778 views
Terms and Definitions matching___ Statistics ___ Discrete variable ___ Statistics ___ Continuous variable ___ Population ___
1. 0 answers
2. asked by Anonymous
3. 758 views
A voltaic cell designed to measure [Cu2+]is constructed of a standard hydrogen electrode and a copper metal electrode in the
1. 0 answers
2. asked by Jina
3. 757 views
A 1000kg space craft at 500m/s is on a collision course with a 400kg satellite travelling at 700m/s. Their paths are converging
1. 1 answer
2. asked by Jon
3. 753 views
Derek the drunk driver drives his car off the road, onto a gravel strip next to the road. Derek does not have anti-lock brakes,
1. 1 answer
2. asked by aok
3. 745 views
There are 25 students. Yesterday, 6 of them were absent. What percentage of the students were absent?
1. 3 answers
2. asked by Cat
3. 743 views
How might a lack of sunlight distrupt a food web?A:It would cause consumers to consume less? B:It would prevent producers from
1. 2 answers
2. asked by Mica
3. 735 views
C6H8O7 + 3NaOH --> NaC6H5O7 + 3H2O
1. 3 answers
2. asked by ronald
3. 717 views

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