Friday
October 31, 2014

Posts by Amanda


Total # Posts: 1,986

Chemistry
I have this problem.... Hexane has a density of 0.659 g/ml. How many milliliters (mL) would a student need to pour in order to get 49.5 g of hexane? Am I to solve by using mass = density x volume? And if so, is the answer 32.62mL?
September 16, 2012

i don't understand this math
4 is A those of u who think its c are wrong
September 12, 2012

Algebra 2
2x-y+=-9 3x-8y=-7 using the substitution method.
September 10, 2012

AP Physics
The volume of liquid flowing per second is called the volume flow rate "Q" and has the dimensions of [L]^3/[T]. The flow rate of a liquid through a hypodermic needle during an injection can be estimated with the following equation. Q = pi * R^n (P2 - P1) / 8ηL ...
September 8, 2012

math
500 becuase it takes away a hundred mph with the aerodynamicness
September 7, 2012

Theory to Practice
it would be b because it is one of the biggest obsticles as a begginner
September 7, 2012

mr sus
it will show the teacher that you have fully grasped the entire concept of what has been taught to you.
September 7, 2012

Economics
what exactly ?
September 7, 2012

Chem
What is 1250.37986 with 3 significant figures?
September 6, 2012

Physics
(a) Find the capacitance of a parallel-plate capacitor made of two 5 cm×5 cm square plates separated by 1 mm. (b) If 50 V is applied to this capacitor, how much energy is stored?
September 4, 2012

Physics
Three positive particles of charges 1 μC, 2 μC, 3 μC, and 4 μC, are located at the corners of a square of side 1 cm. Calculate the potential in the center of the square, taking V = 0 at a great distance.
September 4, 2012

Physics
How much work does the electric field do in moving a 2 μC charge from a point with a potential of +20 V to a point with a potential of −20 V?
September 4, 2012

physics help please!
Never mind I figured it out the answer is 67.3614 if anyone needs help
September 3, 2012

physics help please!
A race car is one lap behind the lead race car when the lead car has 57 laps to go in a race. If the speed of the lead car is 66.2 m/s, what must be the average speed of the second car to catch the lead car just before the end of the race (i.e., right at the finish line...
September 3, 2012

physics
Tammy leaves the office, drives 43 km due north, then turns onto a second highway and continues in a direction of 30◦ north of east for 80 km. What is her total displacement from the office? and At what angle is her displacement? (Consider east to be 0◦ and ...
September 3, 2012

Math/Chemistry PLS HELP
Find the absolute and percent relative uncertainty and express each answer with a reasonable amount of significant figures. 9.2(+ or -0.7)*(0.0054(+-0.3)+0.0056(+-0.7) The Algebraic answer: 0.1012 Absolute error? Relative error %?
August 30, 2012

Chemistry 314
Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 ± 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.) (Input...
August 30, 2012

chemistry
A volume of 29.62 ± 0.05 mL of HNO3 solution was required for complete reaction with 0.8896 ± 0.0008 g of Na2CO3, (FM 105.988 ± 0.001). Find the molarity of the HNO3 and its absolute uncertainty. I have the molarity of HNO3 = 0.5667
August 30, 2012

Chemistry
A volume of 29.62 ± 0.05 mL of HNO3 solution was required for complete reaction with 0.8896 ± 0.0008 g of Na2CO3, (FM 105.988 ± 0.001). Find the molarity of the HNO3 and its absolute uncertainty. I have the molarity of HNO3 = 0.5667
August 29, 2012

Chemistry
Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 ± 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.) (Input...
August 29, 2012

calculus 1
THANK YOU!!!!!
August 27, 2012

calculus 1
If you can program a calculator or computer, estimate the length of the curve f(x) on the given interval using largest n's. f(x)=56cos(x), for x is greater than/equal to 0 and x is smaller than/equal to pi/2.
August 27, 2012

Chemistry 314
What NaCl concentration results when 254 mL of an 0.880 M NaCl solution is mixed with 412 mL of a 0.450 M NaCl solution?
August 26, 2012

Chemistry
I figured it out thanks to related questions.
August 26, 2012

Chemistry
75.0 mL of a 1.80 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 187 mL of water. What is the final concentration?
August 26, 2012

Chemistry
75.0 mL of a 1.80 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 187 mL of water. What is the final concentration?
August 26, 2012

Structured English Immersion
How can the continuum of strategies be used inappropriately in the classroom?
August 25, 2012

algebra 2
Tickets for the hamiltons high school's summer play are $3 for students and $5 for non-students. on opening night 937 tickets were sold and $3943 is collected. How many tickets were sold to students? non-students?
August 22, 2012

9th grade algebra/Ms Sue
22
August 22, 2012

geography
A stream has jumped its banks and is starting to flow through a formerly dry prairie. Trees are beginning to take root near the riverbed and are starting to develop a canopy. Explain what you believe will happen to the native grass that has flourished in this spot up until now...
August 21, 2012

math
You have an aquarium for your new pet, “Shamu” the killer whale, that contains 100,000 pounds of ocean water with a salinity of 30 o/oo. a. Calculate how many pounds of salt are currently in the aquarium. b. You think Shamu may be allergic to salt, so you decide to ...
August 21, 2012

Social Studies
YES FOR SURE
August 15, 2012

Science
How gravitational acceleration is used to benefit mankind and the environment. How can rural people also benefit from thr use of gravitational acceleration?
August 13, 2012

SPANISH
Change the following constructions to an adjetivo posesivo and noun according to the example: Example: la mesa de ella su mesa 1. el gato de Juan y María 2. las sillas de ti 3. el hermano de mí 4. la computadora de tu y yo 5. la mesa de usted 6. la mesa de ...
July 27, 2012

chemistry
What is the molarity of a solution containing 18.0 g of KCl in 354 mL of solution?
July 12, 2012

Principles of Management - Strategic Management
please review my answers! 1. which of the following is an example of an internal stakeholder of an organization? A) distributors B) suppliers C) Unions D) Individual Workers It is: D) Individual Workers 2. Two drug companies agree to work together to pool their research and ...
July 10, 2012

Writeacher maybe you can help ? Principles of Management - Effective Management
Are you a business expert? I saw your responses under the business catagory?
July 10, 2012

Principles of Management - Effective Management
Do you know of a Business Expert on here that could also double check my work?
July 10, 2012

MS. SUE HELP! Principles of Management - Effective Management
I am trying to enter the corse work today, please help!
July 10, 2012

Principles of Management - Effective Management
Please double check my answers please! 1. a team manager is resolving the conflicts that exist among the members of his team in an organization. this is an example of: a. planning b. organizing c. leading d. controlling answer C 2. a manager at a grocery store is trying to ...
July 10, 2012

College Math
Write the mixed number as an imprper fraction. 7 1/9 = A. 64/9 b. 22/3 c. 7/1 d. 65/9 I think the answer is A.
July 9, 2012

math
If the graph x squared + y squared = c contains the point (-3,5), then c = ?
June 18, 2012

Math
A line segment begins at point (3,4) and has a length of 13 units. What are the possible endpoints of this line segment?
June 18, 2012

Math
the perimeter of an equilateral triangle is 50 inches longer than the length of one side. What is the length of one of the sides?
June 18, 2012

chemistry
how many grams of c2h6o contain the same number of oxygen atoms as 0.75 mol of h2o?
June 18, 2012

Math
Find how much interest $15,000 earns in 4 years in a certificate of deposit paying 8.5% interest compounded quarterly.
June 13, 2012

vocabulary
is the indirect definition of gloomy, dismal or depressing? please help.
June 13, 2012

physics
A rock is tossed straight up with a speed of 29m/s. When it returns, it falls into a hole 13m deep. Solve for rock's velocity as it hits the bottom of the hole. &How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?
June 12, 2012

child care
be able to acquire most of your equipment from free and inexpensive sources
June 8, 2012

Physics
A sheet of siding has a centrally-located doorway of width 2.0 m and height 6.0 m cut out of it. The sheet, with the doorway hole, has a mass of 264 kg. (a) What is the x coordinate of the center of mass? (b) What is the y coordinate of the center of mass? Assume the lower ...
June 3, 2012

Busniess English - Negative and Persuasive Message
Which sentence presents an alternative in appropriate way? a. "The 11 a.m. flight is completely sold out, so I booked you on the 2 p.m. flight. Hopefully that will work for you." b. "We are out of the red units, so we went ahead and shipped you 12 green ones ...
May 31, 2012

business english -
Thank you so MUCH!
May 31, 2012

business english -
Indicate the alternative that both correctly evaluates the following sentence and correctly explains the reason for the evaluation. "As soon as you provide your date of birth on Line 2, your application for a flexible spending account will be processed." a. Good ...
May 31, 2012

Business English - WRiting to build goodwill
C. Main idea(s), background information, negative elements, benefits, goodwill ending.
May 31, 2012

Business English - WRiting to build goodwill
4. A 11. C 19. B
May 31, 2012

Business English - WRiting to build goodwill
Can someone double check my answers? 1. Which way of askin for action carries the highest level of politeness? A. a polite order B. an indirect request c. a question d. an order answer is: c. a question 2. Which of the following statements most effectively applies you-attitude...
May 31, 2012

Business English
I thought I updated this, however I entered my answers that I stated above for my grade. I got 17 out of 20 correct, the wrong answers were: 4. It should of been C. 11. Should of been D. 12. Should of been B.
May 30, 2012

Business English "Designing the page and ect"
Please double check my answers for me. 1. The appearance of a document can do all of the following except: A. establish rapport with the audience. B. guide your readers' attention C. substititue the written text in the document. D. Build goodwill. answer: C. Substitute teh...
May 30, 2012

business english
I had originally answered D however the exam stated that was wrong, Im trying to retake it and I am still coming back to D but I dont want to get the answer wrong again.
May 30, 2012

business english
User: Which of the following is NOT an example of parallel structure? A. "Yoga can help you develop flexibility, reduce stress, and increase relaxation." B. "Learn how to analyze business audiences, improve your style, and edit thoroughly." C. "You are...
May 30, 2012

biology i need help urgent
what characteristic distinguishes arthropods from other invertebrates? a. the colem b.the endoskeleton c.jointed appendages d.bilateral symetry
May 30, 2012

biology
what is a notochord, and what is the notochord surrounded by
May 30, 2012

Busniess English
Select the correct punctuation to place on the line. Gusty winds damaged several power lines__ therefore, no one in our town has electricity. A. : B. ; C. - D. .
May 30, 2012

chemistry
mass of crucible- 18.50g mass of crucible+hydrate- 19.50g mass of crucible+anhydrous salt 1st heating- 19.10g mass of crucible+anhydrous salt 2nd heating- 19.10g Questions: 1. calculate mass of water lost from your sample 2. calculate % of water in sample CuSO4*5H2O 3. ...
May 29, 2012

Management
Which of the following statements about Maslow's needs hierarchy is correct? A. Esteem needs must be satisfied before one strives to fulfill social needs. B. Self-actualization is a growth need. C. safety needs are more basic than physiological needs. D. Social needs are ...
May 29, 2012

finance
A corporation has a total of $500 million and 100 million shares outstanding. It's ROE is 15%. Calculate the EPS. I know the EPS= ROE x Book value per share How do I find the book value
May 24, 2012

Chemistry
You want to prepare a pH=4.50 buffer using sodium acetate and glacial acetic acid. You have on hand 300 mL of 0.100 M sodium acetate. How many grams of glacial (water free) acetic acid should you add to prepare the buffer? (Ka of acetic acid is 1.8e-5 at: 25 degrees Celsius)
May 24, 2012

Chemistry
You want to prepare a pH=4.50 using sodium acetate and glacial acetic acid. You have n hand 300 mL of 0.100 M sodium acetate. How many grams of glacial acetic acid should you add to prepare the buffer? (Ka of acetic acid is 1.8e-5 at: 25 degrees Celsius)
May 24, 2012

math
i the conveyor belt takes 54 seconds to move gravel from the bottom of the conveyor belt to the tope at a rate of 3 feet per second, how high does the conveyor belt lift the gravel?
May 23, 2012

geometry
in the diagram below of triangle TEM, medians line TB, line EC and line MA intersect at D, and TB = 9. Find the length of TD.
May 15, 2012

geometry
in the diagram below of triangle TEM, medians line TB, line EC and line MA intersect at D, and TB = 9. Find the length of TD.
May 15, 2012

business english
Select the correct punctuation to place on the line. I found an inspiring bumper sticker with a quote from Mahatma Gandhi_"Whatever you do will insignificant, but is very important that you do it." a. : b. ; c. - d. .
May 14, 2012

physics
a bus engine can operate at very high temperatures . if one of the cylinders has a volume of 1 litre and is initially at 25°C and atmospheric pressure , what is the temperature when the gas in the cylinder is reduced to a volume of 100cubic centrimeters and pressure of ...
May 13, 2012

Chemistry
What is the pressure of a sample of Chlorine gas if the gas sample contains 0.25 moles of Chlorine and has a volume of 150 L with a temperature of 25 K?
May 13, 2012

Chemistry
what do i plug in for v2 and p2 then?
May 13, 2012

Chemistry
p1v1/t1=p2v2/t2 (5)(100.0)/510=...
May 13, 2012

algebra
-71+square root of 1/142 simplify
May 13, 2012

math
x^2+x+3=0
May 13, 2012

math
30d^2+71d+42=0
May 13, 2012

math
4x-y=7 5x+y=20
May 13, 2012

math
1/5x+y=2 x-10++-5y
May 13, 2012

math
2x^-15y^15/x^20y^-10
May 13, 2012

math
A box with no top is to be constructed from a piece of cardboard whose width measures x cm and whose length measures 6 cm more than its width. The box is to be formed by cutting squares that measure 2 cm on each side from the four corners, and then folding up the sides. If the...
May 12, 2012

math
the printed matter on a 18 by 22 centimeter page of a book must cover 96 square centimeters.If all margins are to be the same width, how wide should they be?
May 12, 2012

math
3x+8 over 5 + 7/5= -7x over 4
May 12, 2012

math
a/5-1/5=-6
May 12, 2012

Physics
how do you know what to plug into the equation?
May 8, 2012

Physics
Two positive charges with the same magnitude are one meter apart. Find the magnitude of the charges if the force between them is one Newton.
May 8, 2012

Amortization of Loans
A car is purchased for $9,192.57 with $1470 down and a loan to be repaid at $200 a month for 2 years followed by a balloon payment. If the interest rate is 6% compounded monthly, how large will the balloon payment be?
May 5, 2012

Probability
From a box containing 7 blue, 5 red, 3 green, and 9 yellow marbles, 2 are drawn one at a time without replacing the first marble before the second marble is drawn. Find the probability that one is blue and one is yellow.
May 2, 2012

Probability
A pair of fair dice is tossed once. Find the probability a sum of 5 or 3 appears.
May 2, 2012

physics
a 1250 kg car, rolling at 40km/h along a flat frictionless surface strikes a horizontal coiled spring and is brought to rest in a distance of 2.5m. Assuming there is no friction, what is the spring constant of the spring?
April 29, 2012

Life orientation
ask your life orientation teacher,for more info
April 28, 2012

Chemistry
When 7 mL of a solution containing 4 M KNO3 is diluted to 23 mL, a dilute solution is formed. What is the NO3- concentration in 15 mL of the dilute solution?
April 22, 2012

pre-calc
simplfy the expression by double angle formula or a half angle formula. cos^2(x/2)-sin^2(x/2) 2sin(x/2)cos(x/2)
April 22, 2012

Per-calc Helppppp
find: tanx=-3 one period and all angles 3csc^2x=4 one period and all angles sin2x+cosx-0 one period
April 19, 2012

Per-calc Helppppp
keep in mind answers should be pi radians or if necessary 3 dec. csc^2-2=0 all angles 4cos^2x-4cosx+1=0 all angles and name 8 angles 7sin^2x-22sinx+3=0 all angles and name 8 angles 2cos^2x-7cosx=-3 all angles sinx(2sinx+1)=0 all angles
April 19, 2012

Pre-Calc Help!!!!!!!!
cos(2tan^-1(15/8))
April 19, 2012

Pre-Calc Help!!!!!!!!
1+sin2x/sin2x=1+1/2(secx)(cscx)
April 19, 2012

Pre-Calc Help!!!!!!!!
Evaluate the expression under the given conditions. sin (A+B); tan A= 12/5, A in quadrant 3, sin B= -3sqrt(10)/10, B in quadrant 4.
April 19, 2012

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members