Sunday
September 21, 2014

Posts by dEE


Total # Posts: 755

Chemistry
What is the relationship of the concentration of H3O and of OH
October 9, 2013

social studies
men from higher social classes in------ cultures tend to have low levels of conformity, more self-direction, and have greater intellectual flexibility than did men from lower social classes A) collectivist B) individualist C) interdependent D) all My choice is C but Im a ...
October 4, 2013

physics
a 100g mass of cookie dough hits inelastically with a 300g mass of cookie dough and they stick. the 100 g mass was moving to the right at 40 m/s and the 300g mas was moving to the left at 5 m/s. what is the final velocity of the massive cookie dough ball? what fraction of ...
October 3, 2013

social studies
thank you very much!
September 29, 2013

social studies
I am guessing this one, because I can't find the answer on my book. Would it be D.
September 29, 2013

social studies
people in countries with tend to be happier A) high incomes B) low incomes C) more civil liberties D) high incomes and more civil liberties My answer is B.
September 29, 2013

social studies
daydreaming can be an expression of: A) repression B) denial C) sublimation D) projection My answer is D
September 29, 2013

social studies
thank you for the eye opener:)
September 29, 2013

social studies
then the answer is B, because personality its not heritable and def. not C
September 29, 2013

social studies
all personality variables are: A) highly heritable B) unconscious C) theoretical constructs D) easily assessed with questionnaries My asnwer is D
September 29, 2013

aed
thank you
September 20, 2013

aed
I need an answer
September 20, 2013

aed
determine the potential impact of socioeconomic status on education in the following areas: teacher expectatations, student tracking, equal representation in the curriculum, and financial support for schools
September 20, 2013

math
a rectangular swimming pool 20 feet long and 10 feet wide,is enclosed by a wooden deck that is 3 feet wide. What is the area of the deck? How much fence is required to enclose the deck?
September 19, 2013

math
a rectangular swimming pool 20 feet long and 10 feet wide,is enclosed by a wooden deck that is 3 feet wide. What is the area of the deck? How much fence is required to enclose the deck?
September 19, 2013

Algebra
Express the relationship 20 < C < 30 in terms of F, where F = 9/5C + 32. _____________ < F < _____________
September 17, 2013

Algebra
the cost of renting a rototiller is $16.50 for the first hour and $10.95 for each additional hour. How long can a person have the rototiller if the cost must be less than $55.00?
September 17, 2013

algebra
a student write that an=3n+1 is a explicit formula for the sequence 1,4,7,10.explain the error and write the correct explicit formula for the sequence.
September 11, 2013

college algebra
The county news earns a profit of $20 per year for each of its 3000 subscribers. Management projects that the profit per subscriber would increase by $0.01 for each additional subscriber over the current 3,000. How many subscribers are needed to bring a total profit of $113,100?
September 10, 2013

college algebra
no, I copied the question just as it is, there is 2 answers, the $10,000 is the smaller amount he invested, there should also be a larger amount.
September 10, 2013

college algebra
Scott and Laura have both invested some money. Scott invested $2500 more than Laura and at a 3% higher interest rate. If Scott received $900 annual interest and Laura received $450, how much did Scott invest?
September 10, 2013

college algebra
a large rectangular movie screen in an IMAX theater has an area of 8624 square feet. Find the dimensions of the screen if it is 10 feet longer than it is wide.
September 8, 2013

CHEM
joules to melt a 525g ice cube at 0∘C and to warm the liquid
September 8, 2013

Algebra
Kevin stuffs shrimp in his job as a seafood chef. He can stuff 1200 shrimp in 4 hours. When his sister helps him, they can stuff 1200 shrimp in 3 hours. If kevin gets sick, how long will it take his sister to stuff 600 shrimp?
September 5, 2013

Algebra
Allison drove home at 68 mph but her brother who left at the same time could only drive at 54 mph. When Allison arived, her brother still had 84 miles to go. How far did Allison drive?
September 5, 2013

business
would it B be the best answer?
August 27, 2013

business
Select the statement which reflects the employer position on electric monitoring. a.) An employee's actions during work time are at the discretion of the Company. b.) Employees should be notified of any electronic monitoring and its purpose. c.)Electronic monitoring ...
August 27, 2013

business
A manager refuses to reveal company secrets despite an offer of handsome kickbacks. Which of the following reasons justifies her action if she were to subscribe to Kohlberg’s preconventional level of moral reasoning? A- An idea of the unpleasant emotions she would feel if...
August 27, 2013

Physics
a cylinder of gas is at a room temp (20 c) the air conditioner breaks down and the tempture rises to 58c what is the new pressure of the gas relative to its initial pressure?
July 30, 2013

maths
find a single discount equivalent to the discount series 20%, 10%, and 15%.
June 29, 2013

Stats
1. In a study of caffeine and stress, college students indicate how many cups of coffee they drink per day and their stress level on a scale of 1-10. The data appear below. Number of Cups of Coffee Stress Level 3 5 2 3 4 3 6 9 5 4 1 2 7 10 3 5 = 3.88 X= 5.13 s = 2.03 s = 2.90 ...
June 22, 2013

math
a rectangle has a length of 10 3/16 inches and a width of 6 7/8 inches. nwhat is the perimeter of the rectangle
May 29, 2013

algebra
Need help with 3 problems on page 167 X+2y=6 5x+3y=2 4x-3y=-20 -x-8y=5 5x+6y=-11 3x+y=-4
May 14, 2013

Geometry
A landowner digs a 15 meter deep well with a diameter of 2.8 meters. The landowner spreads the dirt dug out of the holds to form a flat platform 31.5 meters by 6 meters. What is the length of the platform?
May 1, 2013

Geometry
An unsharpened pencil is in the shape of a hexagonal prism, in which the face edge is 4 millimeters and the length is 170 millimeters. What is the lateral area of the pencil?
May 1, 2013

Chemistry
Use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. I absolutely have no idea what to do, please help me!
April 30, 2013

Chemistry
Oh I see what I did wrong! Thanks!
April 30, 2013

Chemistry
i got -1,279.89 and still got it wrong..doing the same calculations just fixing the 468.25 where it belongs
April 30, 2013

Chemistry
For a particular reaction at 195.1 °C, ΔG = -1488.09 kJ/mol, and ΔS = 288.67 J/(mol·K).? Calculate ΔG for this reaction at -20.0 °C. delta G = delta H - (T*delta S) -1488.09 kJ/mol = (delta H) - ((461.8K)*(+288.67 J/(mol x K))*(1 kJ/1000 J)) -1488...
April 30, 2013

geometry
Find the weight to the nearest kg, of the cement block. Cement weighs 1700 kg/m3. 12cm x 10cm and 40cm x 20 cm x 20cm.
April 20, 2013

statistics
It takes approximately 15 minutes to code one record. How many personnel hours would be needed to code 1,424 discharges for the month?
April 15, 2013

Chemistry
So i got Ka = X^2/(0.184-x) not sure what to do next.
April 11, 2013

Chemistry
The Ka of a monoprotic weak acid is 4.47 × 10-3. What is the percent ionization of a 0.184 M solution of this acid?
April 11, 2013

physics
A solid steel cylinder is standing (on one of its ends) vertically on the floor. The length of the cylinder is 3.4 m and its radius is 58 cm. When an object is placed on top of the cylinder, the cylinder compresses by an amount of 5.9 10-7 m. What is the weight of the object?
April 3, 2013

physics
A copper cube, 0.31 m on a side, is subjected to two shearing forces, each which has a magnitude F = 6.40 106 N (see the drawing). Find the angle θ (in degrees), which is one measure of how the shape of the block has been altered by shear deformation.
April 3, 2013

Cal
Find the critical number of the function. g(t) = | 4t - 9 |
April 3, 2013

Chemistry
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. The balanced chemical equation is N2+O2<--->2NO. If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after ...
April 2, 2013

Chemistry
If a 4.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A(aq) --><--- 2B(aq) Kc=8.54 x 10^-6 at 500K ---><--- = equilibrium
April 2, 2013

Chemistry
At a certain temperature, the Kp for the decomposition of H2S is 0.755 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.201 atm in a closed container. what is the total pressure in the container at equilibrium?
April 2, 2013

Chemistry
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) ⇌ PCl3(g) + Cl2(g) A 0.304 mol sample of PCl5(g) is injected into an empty 4.75 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.
April 2, 2013

Chemistry
At a certain temperature, the equilibrium constant for the following chemical equation is 2.00. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.64 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibrium. SO2(g) + NO2(g) <--->...
April 2, 2013

Physics
The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate and (b) the y coordinate of the center of...
April 1, 2013

Cal
lim_(x->0^+)(tan(9x))^x
March 27, 2013

chemistry
How many grams are in 4.00mol of sodium chloride (\rm NaCl)
March 24, 2013

Science
How does the number of neutrons in a stable nucleus compare with the number of protons?
March 22, 2013

Science
If the half-life of a radionuclide is 1 month, is a sample of it completely decayed after 2 months?
March 22, 2013

physical science
What physical quantities are governed by the quantum numbers of an atomic electron?.
March 22, 2013

Physics
A half-atwood machine is constructed, as shown in the drawing below. The table is NOT frictionless, M1 is 50 grams, and M2 is 30 grams. Mass M2 descends 32 cm in 18 seconds. Find the tension in the wire.
March 21, 2013

phical science
Photons and neutrinos have neither charge nor mass. What are the differences between them?
March 18, 2013

Cal
Differentiate the function. f(x) = sin(x) ln(2x)
March 14, 2013

math
nevermind, all figured out. thanks!
March 11, 2013

math
oops, yes carrot cakes...typed too fast. still dont understand, can you explain it better for me please?
March 11, 2013

math
castor brought 6 3/4 carat cakes to share with 26 students. did castor bring enough for each student to have 1/4 of cake?
March 11, 2013

Cal 1
Use Newton's method with the specified initial approximation x1 to find x3, the third approximation to the root of the given equation. (Round your answer to four decimal places.) 1/3x^3 + 1/2x^2 + 1 = 0, x_1 = −3
March 7, 2013

Cal 1
Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answer to two decimal places.) tan x ≈ x
March 7, 2013

Cal 1
Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1 + 2x)^1/4 ≈ 1 + 1/2x
March 7, 2013

Cal 1
Find the linearization L(x) of the function at a. f(x) = x^4/5, a = 32
March 7, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A ladder (L = 7.80 m) of weight WL = 360 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it. A firefighter, whose weight is ...
March 4, 2013

Physics
Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires and the road is...
March 4, 2013

chemistry
wait is it 79.57g?
March 2, 2013

chemistry
delta t = i*Kf*m m = mols/kg solvent 4= (3)(1.86) m= 0.717 (0.717)(1000) = 0.000717mol 0.000717mol/110.98g/mol = 6.46 x 10^-6g
March 2, 2013

chemistry
is the answer 0.079g or 0.00000646g ? I'm not sure if I've done it correctly.
March 2, 2013

chemistry
If Kf = 1.86C/m, how many grams of calcium chloride must be added to 1.0L of water (assume a density of 1.0 g/mL) to lower the freezing point 4.0 C?
March 2, 2013

Chemistry
Imagine two solutions with the same concentration and the same boiling point.? Imagine two solutions with the same concentration and the same boiling point, but one has ethanol as the solvent and the other has carbon tetrachloride as the solvent. Determine that concentration ...
March 2, 2013

Chemistry
A solution is made by mixing 37.0 mL of ethanol, C2H6O, and 63.0 mL of water.? Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C? ethanol: 0.789 g/mL 43.9 torr water : 0.998 g/mL 17.5 torr
March 2, 2013

Math
Find the number of each kind of object in the collection Miranda has 24 CDs in her collection. Of those CDs, 10 are pop CDs. She has 6 more country CDs than jazz CDs. How many country CDs does Miranda have?
March 1, 2013

physics
Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires and the road is...
February 28, 2013

physics
A kite is hovering over the ground at the end of a straight 47-m line. The tension in the line has a magnitude of 14 N. Wind blowing on the kite exerts a force of 17 N, directed 55° above the horizontal. Note that the line attached to the kite is not oriented at an angle ...
February 28, 2013

Chemistry
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution? Show work. A) 0.69 B) 0.32 C) 0.13 D) 0.045 E) 0.87
February 27, 2013

Chemistry
Isoamyl salicylate (м = 208.25 g/mol) has a pleasant aroma and is used in perfumes and soaps. Which of the following combinations gives a 0.75 m solution of isoamyl salicylate in ethyl alcohol (d = 0.7893 g/mL)
February 27, 2013

math
500000
February 25, 2013

Chemistry
Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.
February 25, 2013

math
A two digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units digit. What is the number?
February 18, 2013

Physics
A model rocket launches with an initial velocity of 6 m/s, at an angle of 90 degrees (with respect to the horizon). The rocket's engine provides an acceleration of 2.2 m/s2, acting in the same direction as the initial velocity. After 20 seconds, the rocket engine cuts out...
February 15, 2013

physics
A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force exerted on the spacecraft by the earth balance that exerted by the moon? This point lies on a line between the centers of the earth and the moon. The...
February 12, 2013

physics
The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of earth = 5.98 1024 kg, ...
February 7, 2013

physics
The weight of an object is the same on two different planets. The mass of planet A is only forty-five percent that of planet B. Find the ratio rA/rB of the radii of the planets.
February 7, 2013

physics
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 45.5° above the horizontal and has a magnitude of 7.60 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
February 7, 2013

math
How to name 3300 in 4ways
February 7, 2013

Movement and Music
which of the following best describes the realation between movement and music a movement and music are parteners because they enhance each other and provide enjoyment
February 7, 2013

English II
I have to write an satire and I am doing it on the movie The Help.
February 3, 2013

physics
A hot-air balloon is rising straight up with a speed of 6 m/s. A ballast bag is released from rest relative to the balloon at 7 m above the ground. How much time elapses before the ballast bag hits the ground?
January 31, 2013

physics
Search: On a pleasure cruise a boat is traveling relative to the water at a speed of 5.4 m/s due south. Relative to the boat, a passenger walks toward the back of the boat at a speed of 1.4 m/s. (a) What is the magnitude and direction of the passenger's velocity relative ...
January 31, 2013

physics
In a marathon race, Chad is out in front, running due north at a speed of 3.92 m/s. John is 92 m behind him, running due north at a speed of 4.33 m/s. How long does it take for John to pass Chad?
January 31, 2013

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