Tuesday
October 25, 2016

# Posts by An

Total # Posts: 79

math
October 18, 2016

math
A man 6 feet tall walks along a walkway which is 30 feet from a the base of a lamp which is 126 feet tall. The man walks at a constant rate of 3 feet per second. How fast is the length of his shadow changing when he is 40 feet along the walkway past the closest point to the lamp?
October 18, 2016

math
Why you have v(t) = 30π - π/2 t???
October 18, 2016

math
The upper chamber of an hour-glass is a cone of radius 3 inches and height 10 inches and, if full, it requires exactly one hour to empty. Assuming that the sand falls through the aperture at a constant rate, how fast is the level falling when: a) the depth of the sand is 6 ...
October 18, 2016

Math
How many of those numbers are 1s? How many numbers are there in total? put the first answer over the second one and that should be the fraction. Simplify if needed. To find the decimal, use the first answer and divide it by the second answer.
October 4, 2016

Physics
An automobile traveling along a straight road increases its speed from 67 ft/s to 85 ft/s in 180 ft. If the acceleration is constant, how much time elapses while the auto moves the 180 ft? Answer in units of s. Can you tell me the steps in doing this?
October 4, 2016

Hkl
when rounded to the nearest 10, am 20. I am an odd number. The difference in my digits is 1, am greater than 21, what number am l
November 8, 2015

Physics
Two particles of mass 5 g and 10 g respectively are joined by a light string which passes through a small hole on a smooth table. The smaller particle describes a circle of radius R on the table at a rate of 4 revolutions per second while the heavier particle hangs at rest ...
October 14, 2015

chemistry
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. help please 25g/58.44g NaCl=.428 mol 1000 grams of solvent H20 25g/58,...
January 6, 2015

ap chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015

ap chemistry
HELP ME WITH THIS ONE WHEN DONE WITH THE OTHER THX calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? k for CO2 is 3.4E-2 mols/L*atm c=KP Substitute p of 3....
January 5, 2015

ap chemistry
also for the above question the answer for the mole fraction of NaCl is 0.00785 not 0.00766 what i do wrong moles of NaCl (.428 mol)/ moles of solution (55.9) = 0.00766 what i do wrong?
January 5, 2015

ap chemistry
25g/58.44g NaCl=.428 mol 1000 grams of solvent H20 25g/58,44 g x100= 42.8 % mass percent molarity .428 mol/1.0 L= .428 M molality= .428 mol/1 Kg= .428 molal is that right? help please ap chemistry - an, Tuesday, January 6, 2015 at 12:47am is that right please help me ap ...
January 5, 2015

ap chemistry
thanks good night
January 5, 2015

ap chemistry
January 5, 2015

ap chemistry
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. help please 25g/58.44g NaCl=.428 mol 1000 grams of solvent H20 25g/58,...
January 5, 2015

operation planning
A gourmet coffee shop in downtown SF is open 250 days a year and sells an average of 80 pounds of Kona Coffee beans a day. it purchase coffee beans for \$20.00 per pound. ordering (fixed cost = \$16 per order), beans are always shipped from Hawaii within exactly 2 days. Per-...
October 30, 2014

chemistry
0.9544 is in volts or eV?
August 24, 2014

History
May 22, 2014

Math -___-
wow stupid
May 17, 2014

probability
c=1/128
February 27, 2014

History
1. In 1916, Woodrow Wilson ordered General John J. Pershing to lead U.S. troops into Mexico to capture A. Francisco Madero. B. Victoriana Huerta. (C. Pancho Villa.) D. Porfirio Diaz. 2. The last of Wilson's Fourteen Points called for (A. the creation of a League of Nations...
November 12, 2013

English Vocabulary fill in the blank
1. Degenerate 2. Implausible 3. incoherent 4. intercede 5. intricate 6. sanctuary 7. scrutiny 8. sinister 9. suffice 10. vulnerable need help 1-2 Birds feel ___ to attack when they are out in the open where shrubbery is sparse. To attract them to your bird feeder, put it near ...
September 20, 2013

Physics
can anyone help me with question 6?
May 22, 2013

Chemisry
Glasses do not have slip systems Glasses are brittle at room temperature Glasses are amorphous and have no long range symmetry The volume of a sample of glass depends on its cooling rate
April 10, 2013

chemistry
Glasses do not have slip systems Glasses are brittle at room temperature Glasses are amorphous and have no long range symmetry The volume of a sample of glass depends on its cooling rate
April 10, 2013

Quantum Physics
III)Provide a unitary that maps cos (30) |0> + sin (30) |1> to cos(-15) |0> + sin(-15) |1> and cos(5) |0> + sin(5) |1> to cos(-40) |0> + sin(-40) |1> . Enter 0 in all boxes if no such unitary exists.
March 12, 2013

science
You are from connections academy. Look in the book.
February 5, 2013

I need help explaining ratios and proportions to my 6th grader
January 28, 2013

chemistry
January 12, 2013

Chemistry
d = 0.41 how can i calculate that result?
December 15, 2012

Chemistry
how you clacula the number c?
December 11, 2012

Statistics
. State the null and alternative (research) hypothesis in symbolic form. The hypothesis should be written based on the following information from the research situation: “The health psychologist in question is particularly interested in the myth of the ‘Freshmen 15...
December 2, 2012

chemistry
d111 λ=3.091A a=3.53A λ=2d(111)Sin(angle) d=a/sqrt(h^2+k^2+l^2)
November 27, 2012

physics
If motion of a particle of mass (m) is given by y=ut+1/2gt^2 (square).find force acting on it
October 5, 2012

physics
a bomb of mass 5 kg explodes in to two equel fragments. At what angle these fragment fly apart ?
October 5, 2012

MATH FAST NOW!!!!
1.-80%(-2) (=,<,>) 120/3 2.-1750%70 (=,<,>) -1008/48 3.240/-80 (=,<,>) -150/50 4.675/-45 (=,<,>) 865/-51 5.-3755%x= -15 7.x%(-17)=-35
September 20, 2012

Math
September 19, 2012

Math
1.-80%(-2) (=,<,>) 120/3 2.-1750%70 (=,<,>) -1008/48 3.240/-80 (=,<,>) -150/50 4.675/-45 (=,<,>) 865/-51 5.-3755%x= -15 6.22=x%(-34) X=-748 7.x%(-17)=-35 8.-680 % x =53 X=-13
September 19, 2012

Easy math
But I need it for 6 o'clock
September 19, 2012

Easy math
Do you know who else can help me
September 19, 2012

Easy math
Ms.Sue can you help me
September 19, 2012

math
Susan wore the blue ribbon Clare wore the yellow ribbon Now you do jean
September 19, 2012

physics
A Cessna aircraft has a lift-off speed of 120 km/h. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 265 m? Answer in units of m/s2 b) How long does it take the aircraft to become airborne? Answer in units of s
September 6, 2012

Life Orientation
Pollution
April 29, 2012

physics
If a violin string vibrates at 1720Hz, what is the wavelength of the sound produced in the surrounding air? (assume T=20 degree Celsius and speed is 344m/s)
February 2, 2012

What exposure will a radiology technologist receive when exposed for 10 minutes at 4 meters from a source with intensity of 100 mR/min at 1 meter?
October 13, 2011

chem
If 1.0 L of 0.2 M Ca(OH)2 is added to 2.5 L of 0.1 M HCl, the pH of the final solution is? can someone show me the working out of this question? im very confused by it. thankyou
August 18, 2011

English
The marshmellow man is from ghostbusters..lol
April 17, 2011

biochemistry
I have three questions. I don't even know where to begin. 1. a) If an in vitro fatty acid synthesizing system is supplied with [2-14C]-acetyl CoA as the only source of radioactive label along with all other necessary cofactors/reactants for net fatty acid synthesis, in ...
December 9, 2010

physics
A block lies on a smooth plane tilted at an angle è = 28.5° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. 1 m/s2 (b) If the block starts from rest 9.40 m up the plane from its base, what will be the ...
December 7, 2010

The box of An has more crayons the the box with matthew
October 13, 2010

chemistry
yes its right, cv, oh, lumo, homo
July 13, 2010

CHEMISTRY (WEBWORK)
its not F
July 6, 2010

math
(10 * 8) + 1 = 80 + 1 = 81 After your examples I am sure you could have figured this one out
March 15, 2010

Mathematicas
What generalizations can you make about the temperature that is read on the thermometer and the heat index?
February 2, 2010

math
Is there a number greater than six on a number cube? NO! so the answer should be 0...
January 29, 2010

math
No problem!
January 29, 2010

math
Any more questions?
January 29, 2010

math
The answer is 520 by the way....
January 29, 2010

math
well... i don't really understand that... you could just multiply all the numbers and get the answer...
January 29, 2010

math
well... do you have to show the compatible numbers?
January 29, 2010

math
sorrry it posted twice again...
January 29, 2010

math
Your numbers are(3+8)+2 =(8+3)+2 (3+8)=11 11+2=13 then you have (8+3)=11 11+2=13 In associative property you will use the same numbers to make different problems. They will always have the same answer. Does that help at all?
January 29, 2010

math
oh sorry... i posted twice... Your welcome... do you understand why it is associative?
January 29, 2010

math
To win \$1 million, you must draw two cards whose sum is nine from a stack of cards numbered 1 through 10. After the first draw, you replace the card and shuffle the stack again for the second draw. What is the chance that your two cards will have a sum of nine? Please help me...
January 27, 2010

science
campare inheritance by multiple allels and polygenic inheritance
December 10, 2009

Geometry
well basically its asking you to find the differences (subtract) the numbers that are side by side so example 1,1,2 so you would 1-1=0 2-1=1 and so on
August 25, 2008

calculus
if dy/dx= (1+lnx)y and if y=1 when x=1, then y=
January 30, 2008

algebra question
240 is the sum of two numbers in which the larger number is 6 less than twice the smaller number what are the two numbers
October 1, 2007

science
big idea oof energy is shoowing the changes of how energy is transferred
October 20, 2006

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