Tuesday
September 23, 2014

Posts by Zach


Total # Posts: 299

english
In the sentence: Not only it does affect women and children, but it also affects our society and our future generations. is the sentence correct? Thank you :)
November 17, 2011

physics
how much force is exerted on a bag that is lifted at 5m/s^2 with 18.5kg in it
November 15, 2011

Math
What is 5x^2y^-3 over 25x^6y^2 in simplest form
November 13, 2011

Math
What is the annual interest rate if $1600 is invested for 6yrs. and 456 in intrest is earned
November 9, 2011

science
the lack of atmosphere.
November 8, 2011

science
the tracks of the astronauts who landed on the moon are still there in the dust and show no signs of being worn away.this is attruted to the lack of atmosphere on the moon. which of the following best accounts for the lack of atmosphere.
November 8, 2011

physics
A 4.85-kg block is placed on top of a 12.0-kg block that rests on a frictionless table. The coefficient of static friction between the two blocks is 0.645. What is the maximum horizontal force that can be applied before the 4.85-kg block begins to slip relative to the 12.0-kg ...
November 7, 2011

Physics
A.) h/4μk B.) h/16μk
November 1, 2011

Chemistry
"Suppose some sort of clamp is applied to hold an electron fixed at the distance of 2.5 Angstroms from a lithium nucleus Li3+ which is also clamped into position. Calculate the magnitude of the force between the two fixed particles." The books says the answer is: -2....
October 17, 2011

algebra 1
or 100%, depending on what your teacher is looking for
October 16, 2011

Chemistry
"Suppose some sort of clamp is applied to hold an electron fixed at the distance of 2.5 Angstroms from a lithium nucleus Li3+ which is also clamped into position. Calculate the magnitude of the force between the two fixed particles." The books says the answer is: -2....
October 16, 2011

Physics
a) Vi= 6.7sin(53) Vi = 5.35 V = Vi - gt at top 0 = Vi - g t so t at top = Vi/g t = .55 y at top = 1 + Vi t - 4.9 t^2 = 1 + 5.35(0.55) - 4.9(.55)^2 y at top = 2.46 b) u = 6.7 cos 53 x = u t x = (6.7 cos 53)(.55) x = 2.22
October 5, 2011

Simple Subjects
What is the complete and simple subject for, One story links this day to an old Roman festival?
October 4, 2011

geometry
Given three collinear points X, Y, and Z and XY=8 and YZ=20, what is the length of a segment joining the midpoint XY and YZ?
September 24, 2011

Physics
A ball swings in a vertical circle at the end of a rope 1.50 m long. When the ball is 35.9° past the lowest point on its way up, its total acceleration is (-22.5 i + 20.2 j)m/s^2. Find radial acceleration?
September 17, 2011

MAth (make equation true)
5+5*6/2=24
September 14, 2011

Math
your aunt gives you a check on your birthday each year. on your first birthday , she gives you a check for one cent. the next year she gives you 3 cents , then 9. each year she triples the amount of the previous year 's check. how old will you be when she gives you a check...
September 11, 2011

geometry
Given the points K=(-2,1) and m(3,4), find coordinates for a point J that makes angle JKM a right angle.
September 8, 2011

Calculus Precalculus
Answer the calculus question about Point P, 45 mph, etc. It is ALREADY posted on here.
August 27, 2011

math
write an equation to show the relationship between the score received and the number of questions the students answers correctly
August 25, 2011

Calculus
Hey, how come no one has answered parts c through e? I need some help here!!! This is the ONLY site on the internet that has this problem worked.
August 24, 2011

chemistry
If 1/2 moles of 02 react with 24 moles of hydrogen, can 2 moles of water be produced?
June 15, 2011

Chemistry
A gas at 1.5 atm, 2.3L, and 23degreeC changed to 1.0 atu and 2.8L. What is the new temperature?
May 21, 2011

Chemistry
Calculate the mass of NaCl produced when 5.50 moles of Sodium reacts with excess chlorine gas.
May 21, 2011

chemistry
and List all measurements and include proper labels. Molecular weight of benzoic acid: 122.12 g/mole Mass of benzoic acid used: Titration of NaOH and benzoic acid: (Fine Titrations Only) Trial 1 Trial 2 Initial volume(NaOH)(ml) final volume(NaOH)(ml) Calculations/...
April 15, 2011

chemistry
PLEASE NOTE: Titration requires several steps in order to obtain exact results. The procedures described in this lab assume that you have already done the TITRATION TUTORIAL and are familiar with the technique. 1. Prepare the NaOH solution by dissolving approximately 4g of ...
April 15, 2011

math- algebra- help please!
3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5
April 6, 2011

Spanish
A usted _______gusta jugar a los deportes. What goes in the blank?
March 29, 2011

Calculus
The Problem: The spherical top holds a little over 54,000 gallons of water. The base of the top is 60 feet above the ground. The diameter of the supporting column is one-third the radius of the sphere. The base of the supporting column flares out like a cone (a frustum) so ...
March 27, 2011

physics
A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?
March 20, 2011

math
how do i write a decimal and a fraction to show what part of a dollar one penny represents
March 2, 2011

algebra2/trig
4.8 hours
February 26, 2011

Algbra
I need help with the following question. Solve for y: 3x - 2y = 8 + x Please show the steps and the answer, thanks.
February 14, 2011

Geometry
find the lengths of the sides of a triangle whose perimeter is 37. The measure of the first side of the triangle is 8 less than the second side, and the second side is twice the length of the third side
February 10, 2011

Algebra
Please help me solve for the following coefficients. The equation is: 2X-Y=4 if X = 0, then Y = ? if Y = 0, then X = ? if X = 1, then y = ? if Y = -6, then X =? Thanks!
February 9, 2011

physics
Approximate the gravitational force of attraction between a 49.0 kg girl and a 52.0 kg boy if they are sitting 2.5 m apart
February 7, 2011

Algebra 2
A Rectangular Field is to be enclosed by a fence and divided into three parts by another fencer. Find the maximum area that can be enclosed and separated in this way with 500 meters of fencing.
February 3, 2011

Algbra
I need help with the following problem. -6 less than or equal to 3 + 1/3a less than or equal to 5 Please show steps and answer. Thanks.
February 2, 2011

Physic
A ball throw at 45 degree angle with an initial speed of 15m/s. the time for the ball to reach its highest point can be found from the data and known constants using which equation? solve for time?
January 31, 2011

college calc
vertical asymptotes of tan(pi*x)
January 30, 2011

Algbra
1/4x - 5/12x = x - 4/3 Please show steps and answer. Thanks.
January 24, 2011

math
If g(x)= -2^2 and h(x)=x-2/5. Find the indicated value. h(g(5)) I got -5.4. is that right?
January 24, 2011

chemistry
How many grams are in one milliliter?
January 23, 2011

math
(y^4)^1/6
January 20, 2011

chemistry
your carbon atoms aren't equal and i didn't split up my carbon dioxides however it should change anything balancing wise. 2C3H6N6O6 + 3O2==> 6h20 +6CO2(or 3CO2 +3CO2) + 6N2 C=6 C=6 H=12 H=12 N=12 N=12 O=18 O=18 Hope this helps!
January 17, 2011

Algbra
How do you solve this problem? 3/5k - (k + 1/3) = 1/15 (k + 3) Please show me the steps. Thanks.
January 16, 2011

chemistry
In my book the anser for D is 2.68 x 10^4 mg/L as CaCO3, my first thought was to do what you did but i cant get to the answer in the book, am I missing something very obvious here? Im getting like 5.4 x 10^4
January 15, 2011

math
4(3)+4(3) *4 *4 --------- 12+12=24
January 12, 2011

physics
A museum curator moves artifacts into place on many different display surfaces. Use the values in Table 4-2 in the textbook to find Fs,max and Fk if you were to move a 157 kg aluminum sculpture across a horizontal steel platform. Fs,max: Fk:
November 18, 2010

Math
Are (1/2 x 3) x 8 and 3 x (1/2 x 8) equal? Explain how this can help in finding the area of a triangle
November 17, 2010

math
I need to variables would equal 180 by being divided by 1/2
November 17, 2010

math
A=1/2bh A= 1/2 ? ? A= 180 what could the base and height be?
November 17, 2010

math
How does (1/2 x 3) x 8 and 3 x (1/2 x 8) being equal help in finding the area of a triangle?
November 17, 2010

math
Finding the area or a triangle A=1/2bh A= 1/2 x 13.6 x 7
November 17, 2010

math
How do I find the area of a triangle?
November 17, 2010

Chemistry
calculate the number of formula units of 0.0067 g of lithium carbonate, Li2CO3?
November 11, 2010

Chemistry
How many grams of potassium can be obtained from the decompostion of 100 grams of KCl?
November 11, 2010

chemistry
How much iron can be recovered from 25.0 grams of FeO?
November 11, 2010

science
In order for conduction to occur particles must make what?
October 26, 2010

algebra
86 degrees Fahrenheit = 30 degrees Celsius so, (30,86)
October 13, 2010

Physics
I have one problem I just can't figure out, A machine in an ice factory is capable of exerting 3.30 * 10^2 N of force to pull large blocks of ice up a slope. The blocks each weight 1.21 * 10^4th N. Assuming there is no friction, what is the max angle that the slope can ...
October 13, 2010

physics
A. 5.729 m/s^2 B. 51.5625 m/s^2 C. 183.333m D. 70,088m
October 13, 2010

physics
A. a = v/t 165km / 8s = 20.625 km/h/s B. t= 60s-8s =52s, V= 1650km/h-165km/h =1485km/h a=v/t 1485km/h / 8s= 185.625km/h/s C. d=1/2at^2 1/2 * 20.625 km/h/s * (8s)^2 = 183.333m D. 60s-8s=52s d=1/2at^2 1/2 * 186.625km/h/s * (52s)^2 = 70.088km
October 13, 2010

analogies
dollar:cent;meter:centimeter
October 6, 2010

math
I would set up a proportion meters 1 x ---- --- --- scale 2.5 100 (% means out of a hundred) Since 25 x 40 = 100, then 1 x 40 = 40 The bridge is 40m long.
October 6, 2010

Math-Algebra
3|x+5|<= 6 |3x+15|<= 6 -15 -15 |3x| <= -9 /3 /3 x <= -3 Yes, you are correct.
October 6, 2010

algebra
You need to set up the proportion Base 6.5m 4m ---- ---- ---- Length 3.7m e Then you cross multiply: 6.5xe=6.5e 4x3.7= 14.1m So therefore, 6.5e = 14.1m Then divide both by 6.5 to get what e equals. 6.5e/6.5 = e 14.1/6.5 ≈ 2 so e ≈ 2.
October 6, 2010

Teacher Aide
Test scoring
September 30, 2010

math
Is this a star polygon, a polygon, or other, how many sides does it have? {9/3}
September 20, 2010

math
A roulette wheel has 18 red slots and 18 black slots numbered alternaetly with the numbers 1 through 36. Two green slots are numbered 0 and 00. The winning number is determined by the slot into which a single marble rolls. Players are not allowed to bet on green. The house ...
September 18, 2010

algebra
1/3(x+3)+1/6(x-6)=x+3
June 7, 2010

Math
When a survey of 800 people was done, 55% of those surveyed said they ate candy, 65% said they ate chips and 90% said they ate hot dogs. What is the smallest possible number of people who said they ate candy, chips and soda? -Zach
May 26, 2010

math
20 divided 2 minus 24 divided by 3 equals ? No parenthesis
May 24, 2010

Math
The side lengths of a right triangle are each an integral number of units. If one of the legs is 13 units, what is the perimeter of the triangle? Thanks ~Zach
May 20, 2010

Math
Six pipes each having a radius of 0.5 feet are stacked in a triangular pile with three pipes on the ground tangent to each other, two in the next row and one on top. What is the height of the pile. Express you answer in simplest radical form
May 13, 2010

algebra
Graph the linear equation. -3x + y = -6
May 5, 2010

math
Graph the linear equation. -3x + y = -6
May 5, 2010

Math
Thank you
May 4, 2010

Math
A large tank contains 400-kg mixture of water and alcohol. The mixture is 64% alcohol by weight. At each step, 100 kg of the mixture will be drained from the tank, replaced with 100 kg of water and then stirred. After three steps, what percent of the final solution will be ...
May 4, 2010

alegbra
Simplify: 5-3[2(3x-4)+3]
April 29, 2010

math
Simplify 5-3[2(3x-4)+3]
April 29, 2010

math
thank you jen
April 28, 2010

math
m+1 --- 4 + 5 -- 6 = 2m-1 ---- 12
April 28, 2010

algebra
Please help me! Sorry there are 4 questions I need to check my attempts with to see if I am on track. Thanks!! 1. 5-3[2(3x-4)+3] 2. Evaluate when x = -3 and y = 2 3x squared - 4y squared _______________________ 4x - 7y 3. -3/4y = -24 4. m + 1 5 2m - 1 ______ + ___ = ______ 4 6 12
April 28, 2010

algebra
Please help me! Sorry there are 4 questions I need to check my attempts with to see if I am on track. Thanks!! 1. 5-3[2(3x-4)+3] 2. Evaluate when x = -3 and y = 2 3x squared - 4y squared _______________________ 4x - 7y 3. -3/4y = -24 4. m + 1 + 5 = 2m - 1 ______ _ _______ 4 6...
April 28, 2010

9th grade - Civics
I'm doing a crossword. The question is what is the term to "postpone a sentence/fine?" It starts with an R_ _ _ I _ _ _. Thought it was suspend but this isn't right. Any help is great
April 28, 2010

math
Thank you very much Reiny!
April 27, 2010

math
2(x-5)+3x < 4(x-6)+1
April 27, 2010

9th grade Algebra
go to hell!!!
April 25, 2010

math
Thank you so much Reiny.
April 21, 2010

math
With income earned by selling the rights to his life story, an actor invests some of the money at 3% and 30,000 more than twice as much at 4%. The total annual interest earned from the investments is $5600. How much is invested at each rate?
April 21, 2010

Math
How many positive three-digit integers have the property that the tens digit is greater than or equal to the hundreds digit and the ones digit is greater than or equal to the tens digit? Please help :) thanks -Zach
April 21, 2010

math
Thank you so much Reiny.
April 14, 2010

math
The value of a "Mint State-63" 1950 Jefferson nickel minted at Denver is 8/7 the value of a 1945 nickel at Philadelphia. Together, the total value of the two coins is $15. What is the value of each coin?
April 14, 2010

Math
1/2 dozen eggs is 6. If 1/3 of 6 gets broken, it means 2 broke. 4 are not broken. If I understood the question correctly, this should be the correct answer.
April 5, 2010

algebra
Thanks so much Reiny!
April 5, 2010

algebra
6/7S - 3/4 = 4/5 - 1/7S + 1/6
April 5, 2010

Social Studies
I don't get it, so the four influences that Greece had on Roman culture are art, religion, mythology, and the Latin alphabet?
April 2, 2010

Social Studies
What four influences did Greece had on Roman culture?
April 2, 2010

College Chemistry
1) The concentration of the aluminum ion in a test solution is 0.10M. Using the Ksp for aluminum hydroxide (3. x 10^-34), calculate the concentration of hydroxide needed to precipitate aluminum hydroxide. From the concentration of the hydroxide, calculate the pH of the ...
April 1, 2010

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