# Posts by Jacob

Total # Posts: 887

**Physics**

A man is 6 feet tall and wishes to have a "full length mirror" in his house, meaning a mirror that lets him see himself from top to bottom. He goes to the hardware store to get a piece of flat (plane) mirror that is just barely long enough to work. How long is the ...

*September 3, 2012*

**7th grade math**

1/1 2/8 3/27/4/64 :/: n/?

*September 3, 2012*

**MATH**

solve for the equation or formula for the specified variable x+y-a=b,for y over Z

*August 29, 2012*

**Please check my U.S. Government answers!**

Seven was correct. Political culture is defined as a commonly shared set of beliefs and values about politics and government. The culture affects how people believe that politics should be carried out. Most countries have a unique political culture affected by their history ...

*August 28, 2012*

**Physics**

In the double slit experiment with light, we know that the spacing of the interference fringes (which is what we call the bright spots on the screen) depends on the wavelength of the light. How? Specifically, if you make the wavelength of the light bigger, how does the spacing...

*August 22, 2012*

**Chemistry (balance)**

Thank you, it worked... I was diving the wrong way

*August 20, 2012*

**Chemistry (balance)**

if the heat of combustion for a specific compound is -1320.0 KJ/mol and its molar mass is 67.53 g/mol how many grams of this compound must you burn to release 791.60 kj of heat

*August 20, 2012*

**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*

**Central high school**

D(t)=360

*May 24, 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*

**English**

I don't think it's fair of Erin or potato to judge Liz for seeking help. She made it obvious she was just looking for a direction to go and not looking to copy answers. She stated what she knew and was looking for direction on how to form her thoughts better. I know ...

*May 13, 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*

**6th grade science**

How does a virus’s surface proteins help it invade other cells?

*March 4, 2012*

**math**

i believ the answer you want would be 10=-16t^2 + 12t +8

*March 1, 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*

**9th gradae physical science**

I Believe that it will be....

*January 20, 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*

**Physics**

0.014s

*December 9, 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 don't 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*

**MATHES**

0.7M

*October 16, 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*