Friday
October 31, 2014

Posts by Jacob


Total # Posts: 659

Chemistry
On a warm summer day in Athens, the temperature is 33C (dry bulb temperature) and the relative humidity is 60%. What is the absolute humidity? (kg/kg Dry air) What is the humid volume of the air? (m^3 / kg Dry Air) What is the specific enthalpy of the air, taking H2O (L, 0C, ...
August 15, 2012

Chemistry
38.0kg mass of copper is melted to be cast into a graphite mold at a copper pipe foundtry. If the solid copper starts off at the normal melting temperature of copper and the liquid copper is put into the mold at the crystallization point of copper, how much heat is added to ...
August 15, 2012

health
ASheworth FTW
August 11, 2012

health
I believe B is correct :)
August 11, 2012

Mathmatics
A pile of sand that is stockpiled for winter road treatment is in the shape of a perfect cone. The beginning diameter is 110ft and the height at the center is 24ft. Assume wet sand weighs 3400 lbm/yd3. a) How many cubic yards of sand are in the pile? b) What is the mass o the ...
July 9, 2012

English
I need a real life example on how growing up or maturing involves seeing and experiencing pain. We used examples from this book we were reading but I also need a real life example and I can't think of one
June 4, 2012

Math
Thanks. There was ( ) on the 8 and the rest because your answer is not one of the answers
May 31, 2012

Math
No I do not want the Name I want to know how to figure it out once the numbers are all lined up and it is very confusing when signs need to be switched. Can you please explain that?
May 31, 2012

Math
Thanks-got it cubic trinomial. Here's another one when I have to change signs of negatives and positives for addition and subtraction. How do I do for example 5w^2-4w-7-8w^2+3w-3?
May 31, 2012

Math
Q1. How do I know what a expression is called for example 6x^3-9x+3?
May 31, 2012

Physics
A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.195, and the mass of the sled, including the load, is 202.4 kg. If the horse moves the sled at a constant speed of 1.857 m/s, what is the power needed ...
May 27, 2012

Math
Enter parentheses to make the following expression have a Value of 45: 24/8*3+5*2+18/3 *= times/multiple /= divided by
May 23, 2012

Math
Enter parentheses to make the following expression have a Value of 45: 24/8*3+5*2+18/3 *= times/multiple /= divided by
May 23, 2012

National Junior Honor Society Essay Check
Don't Junior Honor Society Essays need to be in paragraphs?
May 15, 2012

math
compare rectangular pyramids and rectangular prisms.How are they alike?
May 7, 2012

physics help please
Q : As you ride on a loop to loop in a roller coaster, select all the forces that might be acting on you at the top of the loop a: force down due to gravity b: force down from the seat on you c: force up on you from the straps holding you in place d: centripetal force on you ...
May 4, 2012

PHYSICS PLEASE HELP !
Q : As you ride on a loop to loop in a roller coaster, select all the forces that might be acting on you at the top of the loop a: force down due to gravity b: force down from the seat on you c: force up on you from the straps holding you in place d: centripetal force on you ...
May 4, 2012

physics- MC QUESTIONS
thank you :]
May 3, 2012

math
what is a shape called with 1 small top,1 big bottom,and when the sides go up it gets smaller and when it goes down it gets bigger.
May 1, 2012

physics
Q: AN OBJECT IS MOVING PAST YOU IN A STRAIGHT LINE WITH A CONSTANT SPEED. YOU CAN CONCUDED A. THAT THERE IS A CONSTANT FORCE IN THE DIRECTION OF MOTION B. THAT THERE ARE NO FORCES ACTING ON THE OBJECT C. THAT THE NET FORCE ON THE OBJECT IS ZERO D. NONE OF THE ABOVE Q#2 IF YOU...
April 23, 2012

PHYSICS
Q: AN OBJECT IS MOVING PAST YOU IN A STRAIGHT LINE WITH A CONSTANT SPEED. YOU CAN CONCUDED A. THAT THERE IS A CONSTANT FORCE IN THE DIRECTION OF MOTION B. THAT THERE ARE NO FORCES ACTING ON THE OBJECT C. THAT THE NET FORCE ON THE OBJECT IS ZERO D. NONE OF THE ABOVE Q#2 IF YOU ...
April 22, 2012

math
A snail crawled for 40 seconds at an average speed of 15 millimeters per second.Explain how to find the distance the snail traveled in centimeters
April 17, 2012

calculus
A magician writes a list of numbers, 1 through 10, on the board then turns his back to the board. Two audience members are asked to write different numbers from 1-10 in the first two spaces. One of the spectators adds the two numbers and places the result in position 3. Then ...
April 7, 2012

Computer Science
I got part one but part 2 is confusing. Part1: Create a class called Person that has two subclasses Student and Employee. Make Faculty and Staff subclasses of Employee. A person has name and address. A student has GPA as a real number between 0.00 and 4.00. An employee has an ...
March 25, 2012

math
a survey was taken at the park. Children were asked how many times they had visited the park this year. Find the range, mode, and median of the data to the right. trips to the Park ----------------------- number of number of visits visitors 3 ///// 4 /// 5 /////// 6 //////
March 19, 2012

statistics
writing to explain. the median score on a test is 90. is it possible to add two more scores to the data and still have a median score of 90? explain ypur answer
March 19, 2012

math
a survey was taken at the park. Children were asked how many times they had visited the park this year. find the range, mode, median of the data to the right. trips to the park. number of visits 3 4 5 6
March 19, 2012

math
a survey was taken at the park. Children were asked how many times they had visited the park this year. find the range, mode, median of the data to the right.
March 19, 2012

Math
64/8*3+25/5*8=
February 28, 2012

Math
There are four people that want to cross a bridge. Sam can cross in 1 minute, Joe can cross in 2, Jack can cross in 5, and Steve can cross in 10. They have one flashlight, and two can cross at a time, but they must go at the same pace. So if Steve and Sam cross together, they ...
February 26, 2012

math
57 Cds in 8 organizers drawpicturesto tell how many are in each group and how many are left over.
February 26, 2012

math
9 because you have the answer.9x8=72
February 22, 2012

maths
can someone please help?
February 21, 2012

maths
could you please help me.... Draw the graph of y=x-3 for values of x from -3 to 4 also how would you draw the graph of to 2x+y=7 for values of x from 0 to 5 i don't need the graph drawn i just need two plots for each! thanks
February 21, 2012

3 grade math
my teacher dose not teach us that
February 14, 2012

Chemistry
How many grams of Ag2S can be generated from a mixture of 2.48 g Na2S and 3.41 g of AgNO3 given the following unbalanced reaction: Na2S(aq) + AgNO3(aq) → Ag2S(aq) + NaNO3(aq)
February 8, 2012

calculus
a.) g(1)= 1^5= 1 f(g(1))=5e^1= 5e? d.) g(f(x))= g(5e^x) = (5e^x)^5? e.) I'm really guessing on this last one because I'm not sure but I'll try it anyway ((5e)^t)(t^5)?
February 2, 2012

calculus
For the function f(x)=5e^x and g(x)=x^5, find the following: (a) f(g(1))= (b) g(f(1))= (c) f(g(x))= (d) g(f(x))= (e) f(t)g(t)=
February 2, 2012

Physics
A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.31 that on Earth?
January 9, 2012

calculus
Evaluate the following integrals by using appropriate method : ∫cos⁡ ^3 ( 2x-5 )dx help
December 25, 2011

calculus
find dy/dx when y = (5 sec^2 x-7 ) ^3 (x^5-5 cosec x - 1)^7 help
December 25, 2011

math
x^2 +6x+9=24+9 (X+3)^2=33 x+3=sqrt(33) x=+-sqrt(33)-3 or look up Quadratic formula
December 19, 2011

Physics
Assume that the Starship Enterprise is moving through space at the speed of light. Calculate how much kinetic energy the ship has at this speed. The Enterprise has a mass of 1*10^6kg. Now imagine that Captain Kirk wants to bring the ship to a complete stop in a distance of ...
December 19, 2011

math
1/2 is the same as .5 and 50% 2/5 is the same as .4 and 40% fractions, decimals and percentages are all interchangeable, however percentages are generally just used in charts for a marketing group to understand (they like percents better).
December 19, 2011

chemistry
metals have lots of free or lose electrons that allows the energy to move freely while insulators electrons are tightly bound and don't allow for lots of energy movement
December 19, 2011

Ap calc
A particle moves on the x axis so that it's position at any time t is greater than or equal to 0 is given by x(t)=2te^-t. A) find velocity for any t is greater or equal to 0
December 19, 2011

Calculus
If x^3 = 1 and x does not equal 1, x(x+1)= ?
December 16, 2011

Statistics
The lifetime of a certain smart phone battery has an unknown distribution with mean value of 8 hours and standard deviation of 2 hours. What is the approximate probability that the average battery lifetime of a sample of 36 batteries will exceed 8.1 hours?
December 12, 2011

Statistics
The lifetime of a certain smart phone battery has an unknown distribution with mean value of 8 hours and standard deviation of 2 hours. What is the approximate probability that the average battery lifetime of a sample of 36 batteries will exceed 8.1 hours?
December 12, 2011

precalculus
State the parent function that must be transformed to create the graph of y=2/3x^3 - 2. Describe the transformation that must be applied to the parent function. Parent function= x^3 I don't know the transformation...
December 8, 2011

Math
Explain how you can determine if a linear factor of a function is squared or cubed by examining the graph of the function. Halp I dont know :|
December 8, 2011

Math
Can someone help me with these T.T 1.Which polynomial function would have the end behaviour of as x-> -∞, y= +inf and as x-> ∞, y-> -∞? a) f(x) = -6x^4 - x^5 + 5x^3 - x^2 - 4x + 9 b)f(x)= 6x^4 + x^5 - 5x^3 + x^2 + 4x - 9 c)f(x) = 3x^2 + x - 11 d)-2x^...
December 8, 2011

social studies
what was the boston massacre
December 8, 2011

Math
Some students might argue that if you know how to factor a sum of cubes, then you do not need to know how to factor a difference of cubes. Explain why you agree or disagree.
December 7, 2011

Math
A rectangle with vertices at (2,5), (7,5), (7,8) and (2,8) is revolved around the line y=5 to obtain a cylinder. What is the volume of the cylinder? Express your answer in terms of pi.
December 6, 2011

Math
Explain how to determine the value of x that gives a maximum for a transformed cosine function in the form y=acos(k(x-d)) + c, a>0, if the maximum for y=cosx occur at (0degrees, 1)
December 5, 2011

Physics
A ball of mass 5.3 kg and radius 8 cm rolls without slipping horizontally at 4.3 m/s and hits a spring attached to a wall. What is the maximum change in length of the spring if the spring constant k=41100N/m? (Assume the floor is frictionless)
November 18, 2011

Physics
A Ferris wheel with radius 11.0 m rotates at a constant rate, completing one revolution every 33.9 s. Suppose the Ferris wheel begins to decelerate at the rate of 0.227 rad/s2 when a passenger is at the top of the wheel. Find the magnitude and direction (in degrees below ...
November 18, 2011

Pre Calc
sec(cos-1 (4/5))=?
November 15, 2011

Pre Calc
tan(tan-1 7.4)=?
November 15, 2011

Accounting
Because DeVry is asking you this question in this week's discussion...seriously, do the research yourself...see you in the threads!
November 6, 2011

derivatives
How do I find the 2nd derivative of x^(-1/15)
November 4, 2011

consumer mathB
Your box of raisin bran cost $1.89 last year. This year it costs $2.25. What is the inflation rate?
November 3, 2011

Chemistry
Obtain the radius of a sphere of zinc if its mass is 0.23 mg. The density of zinc is 7.14 g/mL. The given formulas are: d=m/v v=(4/3)pi r^3
November 3, 2011

chemastrey
of exhow many grams of no2 can be produced by the reaction of excess o2 with 19.8 of no
November 1, 2011

SCIENCE
Last one. What is the first element on the periodic table? I already answered these questions but I'm making sure they are correct:D Thanks
October 27, 2011

SCIENCE
K is the chemical symbol for which element?
October 27, 2011

SCIENCE
What is the name of the 2nd biggest planet in our solar system?
October 27, 2011

Science 6TH Grade
ffefeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
October 26, 2011

World History
a.kush
October 13, 2011

chemistry 12
i got K= (HOBr2)(OH)/(HOBr) 2.0x10^-9 = (x)(x)/0.18M x= 11x10^-6 (OH-) =11x10^-6 (H3O)= 1.0x10^-14/11x10^-6 =9.0x10^-8
October 5, 2011

chemistry 12
Calculate [H3O+] and [OH-] in 0.18M hydrobromic acid, HOBr(aq), having a K of 2.0x10^-9? I got 9.0x10^-8
October 5, 2011

chemistry 12
What i got was : a) K = (3.0x10^-6)(0.12)/(0.12)(0.12)= 0.6 b) i got 1.90%
October 5, 2011

chemistry 12
A) Calculate [OH^-] in a o.12 M solution of hydrazine, H2NNH2(aq), having K of 3.0x10^-6. B) what is the percent ionization of the H2NNH2(aq) I can't get these for the life of mee!
October 5, 2011

Math
On Friday, Jan hiked in the woods. If she hiked a vertical distance of 60 meters relative to sea level and then down 86 meters, where would she be relative to sea level if she started at 0?
October 5, 2011

Math
On Friday, Jan hiked in the woods. If she hiked a vertical distance of 60 meters relative to sea level and then down 86 meters, where would she be relative to sea level if she started at 0?
October 5, 2011

science
why are minerals important and what are 2 examples
September 27, 2011

ENG
how to write a article review ?
September 26, 2011

Math
There are one thousdand students in Central High School. Three hundred twenty-eight of the students are seniors. Write the decimal that shows what part of the student body is in the senior class.
September 23, 2011

math/geometry
A football isnt a sphere
September 21, 2011

algebra
After m minutes an adult blikns about 10+3times.about how many times does an adult blink in three minutes? in two hours?
September 15, 2011

math please help me
18n-20 = 36-10n then what is n? please please help me
September 7, 2011

5th Grade Math
you want to estimate 5.25 - 3.3. why would using front-end estimation and adjusting tell you more about the answer than rounding?
September 6, 2011

geometry
Given that Vector BD Angle ABC, Measures Of Angle ABC =6x - 12, And Angle = 72 Degres, Which Equations Could Be Used To Find The Value Of X? A - 6x - 12 = 72 B - 1/2 (6x-12) = 72 C - 2(6x - 12 = 72 D 6x - 12= 2(72) Can Anyone Help Me How To Solve Or Help Me On Anything
September 2, 2011

geometry
Use formulas to find the lateral area and surface area of the given prism. The base of the prism is the rectangle with sides of length 13m and 5m. Show your answer to the nearest whole number.
August 9, 2011

Math - Calculus
I don't understand? Can you please explain?
July 17, 2011

Math - Calculus
Find the equation of the non-vertical asymptote. What is the smallest value of x at which f(x) intersects its? -6x^3 + 2x^2 - 9x +3 / -5x^2 +9x - 4 1)Find the equation of the non-vertical asymptote. 2)What is the smallest value of x at which f(x) intersects its non-vertical ...
July 17, 2011

Chemistry
A sample of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume will it occupy if the pressure is increased to 894 torr at constant temperature?
July 11, 2011

English
im english
June 23, 2011

Reading
Which word from the choices below is described the poem that follows? We start escaping this when we Sing "A-B-C-D-E-F-G." That song is not enough, and yet The first step is the alphabet! a. aristocrat b. illiteracy c. aura d. essence Help if you can
June 19, 2011

Reading
Woops sorry and thanks lol
June 16, 2011

Reading
Poem "A Voice," By Pat Mora How do you interpret the speaker's statement that her mother's breath "moves through the family like the wind moves through the trees
June 16, 2011

Social Studies
What Indian tribe helped Lewis and Clark build a canoe?
June 1, 2011

Statistics
Use the multiple regression equation to predict a persons salary. Assume that the variable A is the number of years of college. Assume that the variable B is the number of years of experience. Suppose the person has 7 years of college and 3 years of experience. What should ...
May 20, 2011

physics hw urgent please
show how you would you arrange to find f in terms of v,m and r from four equations below. f=1/t, f=ma,v=2piR/T,a=v^2/R Thanks
May 14, 2011

chemistry
what are the acids, bases, conjugated nacids and conjugated bases of the equation H2O+H2O->OH-+H3O?
May 5, 2011

MATHS
i need majer help man
May 4, 2011

math
find the axis of symmetry f(x)=-2x2-12x+8find the axis of symmetry f(x)=-2x2-12x+8
May 3, 2011

Algebra
Pauline sells computers on commission. She spends 2 hours on selling a laptop and 1 hour on selling a desktop computer. She works no more than 40 hours per week and routinely sells at least 1 laptop and at least 4 desktops each week. To maximize her income, how many of each ...
April 26, 2011

Math
Math.. find limit help? Find the given limit. (x→ 1)lim: (square root x-1) + 1
April 26, 2011

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