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2012
April

Questions Asked on April 28, 2012

When the equation for the following reaction in basic solution is balance, what is the sum of the coefficients?MnO2 +
1. 3 answers
2. asked by Wube
3. 9,083 views
An ice cube at 0.00 degree celsius with a mass of 23.5 g is placed into 550.0 g of water, initially at 28.0 degree celsius, in
1. 4 answers
2. asked by Amir
3. 2,881 views
find the product(2a+1) cubed
1. 0 answers
2. asked by scott
3. 306 views
I just wanted to see if my answer if correctthe integral is: ∫(7x^3 + 2x - 3) / (x^2 + 2) when I do a polynomial division I
1. 1 answer
2. asked by Tom
3. 450 views
solve for x 4(2x-1)= 2x+35
1. 1 answer
2. asked by joan
3. 569 views
Fred’s car insurance premium is £448 compared to last year when it was only £375. What is the percentage increase?
1. 1 answer
2. asked by Anonymous
3. 352 views
Ms. sue for the persasive essay on glass castle, you tell me to give examples in essay to prove thesis which be that her father
1. 8 answers
2. asked by Mohammad
3. 660 views
A 50.0kg cyclist on a 10.0kg bicycle speeds up from 5.0m/s to 10.0m/s , the total kinetic energy before acceleratingis 750, and
1. 8 answers
2. asked by Melissa
3. 4,221 views
a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean of 175 and a standard
1. 1 answer
2. asked by charmaine
3. 1,297 views
Tara is researching the stork population living in a bird reserve. On her first day, she captures and tags 37 birds. Two weeks
1. 3 answers
2. asked by Eric
3. 748 views
which of thh following reactants would you add to an aqueous solution of ammonium sulfate in order to precipitate quantitatively
1. 3 answers
2. asked by Rosebud
3. 1,825 views
A fossil is found to have a C-14 level of 86% compared to living organisms. How old is the fossil?, (the half life of C14 is
1. 6 answers
2. asked by Mima
3. 3,189 views
Hi I have done this problem like 15 timeswhen I find the mole I get .8 for HCL and .23 for Naoh and the equilibrium conc i get
1. 1 answer
2. asked by someone
3. 506 views
Write an equation of the ellipse with center at (0, 0), vertex at (4, 0), and co-vertex at (0, 2)
1. 0 answers
2. asked by sam
3. 505 views
Write an equation of the hyperbola with foci (0, -2) and (0, 2) and vertices of (0, -1) and (0, 1).
1. 0 answers
2. asked by sam
3. 513 views
Write an equation of an ellipse with center at (0, 0), co-vertex at (-4 , 0), and focus at (0, 3).I think its... X^2/16+y^2/9=1
1. 0 answers
2. asked by sam
3. 391 views
Write an equation of the hyperbola with vertices at (–7, 0) and (7, 0) and foci at (–9, 0) and (9, 0)
1. 0 answers
2. asked by sam
3. 407 views
A 6.0g pellet of lead at 32 degrees c gains 36.8 J of heat. What will be its final temperature
1. 1 answer
2. asked by Melissa
3. 1,006 views
Graph the equation. Identify the vertices, foci, and asymptotes of the hyperbola.Y^2/16-x^2/36=1 I think....vertices
1. 0 answers
2. asked by sam
3. 747 views
Graph the equation. Identify the vertices, co-vertices, and foci of the ellipse.64x^2+16y^2=1024 This is what i have so far
1. 2 answers
2. asked by sam
3. 1,147 views
In the glass atrium at the entrance to the city aquarium, a designer wants to suspend a 2400-N sculpture of a dolphin. It will
1. 0 answers
2. asked by justin
3. 1,066 views
In a certain city the temperature (in degrees Fahrenheit) t hours after 9 a.m. was approximated by the functionT(t) = 50 +
1. 1 answer
2. asked by Elizabeth
3. 1,025 views
Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5
1. 2 answers
2. asked by Elizabeth
3. 5,175 views
A shuttle bus for a festival stops at the parking lot every 18 minutes and stays at the lot for 2 minutes. If you go to the
1. 1 answer
2. asked by Anonymous
3. 1,180 views
A transparent hemisphere of refractive index 1.5 and radius of curvature 20 cm is placed flat side down on a piece of paper with
1. 1 answer
2. asked by sand
3. 389 views
The three angles of a triangle have measures 12x degree, 3x degree, and 7y degree, where 7y>60. If x and y are integers, what is
1. 1 answer
2. asked by Anonymous
3. 617 views
a circular wire loop of radius 5cm lies in the xy-plane in a magnetic field defined by B=-(4t^2+3t).determine the voltage across
1. 1 answer
2. asked by musa
3. 662 views
Calculate the mass of each compound containd in 60g of a 4.5%m/m CaCl2(aq)solution
1. 1 answer
2. asked by Victoria
3. 352 views
If I invest $30000 at 10% compound interest for eighteen years how much will i get
1. 1 answer
2. asked by alan
3. 553 views
the heat of fusion water is 335J/g,the heat of vaporization of water is 2.26kJ/g, the specific heat of water is 4.184J/deg/g.
1. 1 answer
2. asked by Randy
3. 614 views
I need to prove that the following equation is an identity:(1 + tan(theta/2))/(1-tan(theta/2))=tan(theta)+sec(theta)
1. 1 answer
2. asked by Rod
3. 402 views
what mass of water at 10.0 degrees C is needed to cool 500.0ml of tea from 25.0 degrees C to 18.3 degrees C? Density and
1. 3 answers
2. asked by RoseBud
3. 784 views
In a 0.05M solution of a weak monoprotic acid,[H+]=.0018.What is its Ka?
1. 1 answer
2. asked by Danny
3. 1,135 views
what will be the final temperature of a system in which 150.0g of water at 5.0 degrees C are added to 1.00L of water at 90.5
1. 7 answers
2. asked by RoseBud
3. 1,262 views
based on the following chemical equationHCN+O2 yields N2+CO2+H20 identify the limiting reactants and the mass of N2 produced
1. 2 answers
2. asked by RoseBud
3. 1,041 views
2-octanol and 1-phenilethanol. which one more polarity?
1. 0 answers
2. asked by trang
3. 285 views
i will be greatful to you if you help in solving the below problems:1.)Prove that log15=log5+log3 2.)Show that
1. 2 answers
2. asked by srikar
3. 1,094 views
recent 10K run the finisher are norm dist with a mean of 55 min and stand dev of 13A) determine the percentage of finishers with
1. 1 answer
2. asked by RACHELLE
3. 830 views
A voltaic cell is constructed with an Ag/Ag+ half-cell and a Pb/Pb2+ half-cell. Measurement shows that thesilver electrode is
1. 3 answers
2. asked by anonymous
3. 8,676 views
Calculate the weighted cost of equity for a firm with the following characteristics: (a) Last Dividend--$5.00, (b) Growth
1. 0 answers
2. asked by David
3. 438 views
XYZ Corporation employs 40,00 people with their own associated IP addresses, and operates over 400 servers, including e-mail
1. 0 answers
2. asked by Ginger
3. 1,008 views
Solve the trig equation exactly in the interval 0≤x≤2π.tan x + tan π/3 ------------------ = square root 3 1 - tan x tan
1. 1 answer
2. asked by Anonymous
3. 715 views
The circular path of cars on a ferris wheel can be modeled with the equation x^2-14x+y^2-150y=-49, measured in feet. What is the
1. 1 answer
2. asked by Dena
3. 1,296 views
write the following in compact form using factorialsa. 38*37*36*35*34*33 b. 14!/19*18*17*16*15
1. 1 answer
2. asked by Nathan
3. 401 views
Question: Trying to find cos π/12, if cos π/6 = square root 3 over 2, how to find cos π/12 using DOUBLE angle formula?This is
1. 1 answer
2. asked by Anonymous
3. 747 views
How many grams of hydrogen are collected in a reaction where 1.80L of hydrogen gas is collected over water at a temperature of
1. 1 answer
2. asked by Jessica
3. 563 views
If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is
1. 2 answers
2. asked by Turk
3. 3,943 views
A projectile is launched vertically from the surface of the Moon with an initial speed of 1500.At what altitude is the
1. 3 answers
2. asked by Turk
3. 2,485 views
A scuba diver takes a 2.3L balloon from the surface, where the pressure is 1.0atm and the temperature is 37degrees C, to a depth
1. 2 answers
2. asked by Jessica
3. 1,996 views
1)Expand and simplify. Express each equation in standard form.a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x)
1. 1 answer
2. asked by sandra
3. 505 views
1. What is the base and the height of the rectangle if the area is 216 and the perimeter is 66?2.The perimeter of an isosceles
1. 2 answers
2. asked by Anonymous
3. 1,133 views
A gas sample with a volume of 5.3L has a pressure of 745mmHg at 33degrees C.What is the pressure of the sample if the volume
1. 1 answer
2. asked by houston
3. 1,185 views
A cylinder contains 12.0L of air at a total pressure of 44.0psi and a temperature of 35degrees C.How many moles of gas does the
1. 1 answer
2. asked by houston
3. 491 views
How many moles of gas must be forced into a 3.1L ball to give it a gauge pressure of 9.8psi at 22degrees C? The gauge pressure
1. 1 answer
2. asked by Jess
3. 589 views
An experiment shows that a 111ml gas sample has a mass of 0.161g at a pressure of 725mmHG and a temperature of 36degrees C.What
1. 1 answer
2. asked by Jess
3. 1,190 views
Dave is going for a ride on his unicycle. The radius of the wheel is 25.5cm. When he gets on, the valve of the wheel is at its
1. 1 answer
2. asked by Anonymous
3. 427 views
A sample of gas has a mass of 0.555g . Its volume is 114L at a temperature of 80degrees C and a pressure of 744mmHg .Find the
1. 1 answer
2. asked by Jess
3. 455 views
An air sample contains 0.032%CO2 .If the total pressure is 756mmHg , what is the partial pressure ofCO2 ?
1. 1 answer
2. asked by Jess
3. 397 views
1)Convert 1/20 of a circle to both degrees and radians.All I have is 9/180 is what I come up with. 2) what fraction of a circle
1. 2 answers
2. asked by ALISON
3. 1,709 views
The wheels are connected BT a belt. One wheel has a radius of 10inches and is rotating 40rpm. If the other wheel has a radius of
1. 1 answer
2. asked by ALISON
3. 488 views
The densities of two substances are in the ratio 5:6 and the specific heats are in the ratio 3:5 respectively. The ratio of
1. 2 answers
2. asked by kala
3. 742 views
The thermal capacity of 10g of a substance is 8 calories. the specific heat is in J/kg-Koptions : 1.3360 2.3630
1. 2 answers
2. asked by kala
3. 1,570 views
A piece of metal of mass 112g is heated 100 degree C.,and dropped into a copper calorimeter of mass 40g containing 200g of water
1. 2 answers
2. asked by kala
3. 2,820 views
A particle has a kinetic energy equal to its rest energy.(a) What is the speed of this particle? (b) If the kinetic energy of
1. 1 answer
2. asked by martini
3. 2,125 views
A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b)
1. 1 answer
2. asked by Chi
3. 2,707 views
Radio waves (419m) from a station travel along two paths from the transmitter to a house. The first path is direct, 27km, and
1. 1 answer
2. asked by Nu
3. 384 views
Calculate the de Broglie wavelength of a proton moving at 5.50x10^5 m/s.
1. 1 answer
2. asked by mono
3. 775 views
Electrons are accelerated though a potential of 60V and then from a beam that hits two slits separated by 2.5x10^-8m. (a) What
1. 1 answer
2. asked by genius
3. 517 views
in a reflection the image of the line y-2x=3 is the line 2y-x=9.find the axis of reflection.
1. 15 answers
2. asked by amir
3. 3,104 views
Thank you Ms.Sue for answering my last question. I have one another question that I has hard time understanding...."the
1. 2 answers
2. asked by Delhi
3. 616 views
A 1.4-m-long massless rod is pivoted at one end and swings around in a circle on a frictionless table. A block with a hole
1. 1 answer
2. asked by Anonymous
3. 1,221 views
1.Which angle measure is consistent with all of the following criteria?(i) The reference angle is 40°. (ii) The angle is more
1. 2 answers
2. asked by Anonymous
3. 519 views
3. An industry currently has 100 firms, all of which have fixed costs of $16 and average variable cost as follows:Quantity
1. 0 answers
2. asked by andy
3. 1,623 views
identify ane describe one environmental problem that causes ill health,crises,accedents,and desasters within communities of
1. 2 answers
2. asked by Previlege
3. 459 views
How can the parent rock or bedrock effect the environment?
1. 0 answers
2. asked by jeremy
3. 316 views
y = 1 + (x-1)^(1/2)Considering the interval (2,4), calculate delta(y) and dy. would delta(y) be: delta(y) = f(4) - f(2) = (1 +
1. 2 answers
2. asked by Jer
3. 349 views
A perfectly cylindrical container standing upright with a top and bottom(an oil drum or coke can for example) of area A has an
1. 0 answers
2. asked by Stephen
3. 580 views
most likely satisfy a person who strongly values
1. 2 answers
2. asked by Anonymous
3. 491 views
name two institutions/community organizations that are involved in supporting or giving redress to these disasters.explain how
1. 3 answers
2. asked by mpho
3. 508 views
If the length of the sides of two similar triangles are in the ratio 3:4, what is the ratio of the lengths of a pair of
1. 2 answers
2. asked by CJ
3. 806 views
find the length of a side of a square whose diagonal is 16 in.
1. 1 answer
2. asked by lisa
3. 972 views
y varies directly as the cube of x and inversely as the square of z.If y is 30 when x is 2 and z is 4: b) Find the equation that
1. 1 answer
2. asked by Angie
3. 984 views
What are the different soil formation in nigeria?
1. 1 answer
2. asked by Hayatuddeen Adamu sani
3. 422 views
Identify and describe one environmental problem that causes ill health
1. 2 answers
2. asked by Lucia
3. 695 views
-a^3+10a^2-31a+30=0
1. 1 answer
2. asked by loca
3. 742 views
Identify one environmental or human factor that causes ill health,accidents,crises,and disasters within your community or any
1. 9 answers
2. asked by Dikeledi
3. 948 views
Completa la oracion usando las palabras este,ese,aquella oaquellos.)(Hint:Complete the sentence using este, ese,aquella,o
1. 2 answers
2. asked by JOSEPH
3. 747 views
Express the repeating decimal as a ratio of two integers.2.6231313131....
1. 2 answers
2. asked by Sangita
3. 521 views
When did the Pilgrims arrive at Plymouth Rock?
1. 1 answer
2. asked by Rezu
3. 581 views
What was the name of the original colony established in Virginia in 1607?Colony of Virginia?
1. 1 answer
2. asked by Rezu
3. 424 views
find the length of a side of a square whose diagonal is 36 in.
1. 1 answer
2. asked by lisa
3. 1,063 views
4^2+6^2=c^2
1. 3 answers
2. asked by Taylor Bishop
3. 261 views
one side of an equilateral triangle is 42cm.find the length of an altitude of the triangle.
1. 2 answers
2. asked by lisa
3. 1,529 views
assume equal masses of the following substances, all of them at 20.0 degrees C and exposed to the same source of heat
1. 3 answers
2. asked by RoseBud
3. 1,374 views
I want to make a rectangular garden by fencing in a area on the back of my house. Three sides of the rectangle will be fencing;
1. 2 answers
2. asked by Kendra
3. 610 views
what mass of sodium chloride will be required to completely react with 4.00 x 10(24) units of AgNO3 and form AgCl and sodium
1. 2 answers
2. asked by RoseBud
3. 2,041 views
a gas misture containing N2 and O2 was kept inside a 2.00 L container at a temp of 23.0 degrees C and a total pressure of
1. 1 answer
2. asked by RoseBud
3. 454 views
How many moles of gas must be forced into a 3.7L ball to give it a gauge pressure of 8.4psi at 23degrees C? The gauge pressure
1. 1 answer
2. asked by Jessica12
3. 679 views
sinA + cosA > 1 where A is 0< A < 90 in ABC triangle
1. 1 answer
2. asked by erka
3. 386 views
Point A is 5 feet from the center of the circle and 12 feet from point B. is tangent to circle O at A. Find OB to the nearest
1. 0 answers
2. asked by DA
3. 362 views

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