Sunday

March 1, 2015

March 1, 2015

Total # Posts: 1,579

**algebra**

give a counter example to show that each statement is false, the domain of each variable is the set of real numbers..... number 1 said 1. if a2=b2, then a=b idk how yo do it??
*October 21, 2009*

**chemistry**

It can not be found with the following information. Good luck, hahahaha
*October 19, 2009*

**math**

pennies are kept in a jar the mass of the jar is 20 g the mass of each panny is 5g le t the varible p represent the total mass of pennis and the jar. let the variable n represent the number og pennys. 1a. write an equation that represent the relation ship between mass p and n ...
*October 17, 2009*

**chemistry**

1) What is the major product of dehydration of an alcohol? 2) Why does the simplest ketone have three carbon atoms and no fewer?
*October 14, 2009*

**Chemistry**

How many moles of atoms are in 50 atoms Ba? Answer in units of mol.
*October 11, 2009*

**physics**

It's just 909 N in the opposite direction for each person. If this force against the ground (usually called the force of Friction or Fs) was not there they would not be able to put the tension upon the rope.
*October 9, 2009*

**Statistics**

A simple random sample of 25 has been collected from a normally distributed population for which it is know that o=17.0. The sample mean has been calculated as 342.0, and the sample standard deviation is s=14.9. Construct and interpret the 95% and 99% confidence intervals for ...
*October 3, 2009*

**Statistics**

From past experience, an airline has found the luggage weight for individual air travelers on its trans-Atlantic route to have a mean of 80 pounds and a standard deviation of 20 pounds. The plane is consistently fully booked and holds 100 passengers. The pilot insists on ...
*October 3, 2009*

**Pysical Science**

Mass of C3H8 Reacted with (g) Mass of O2 Reacted (g) Mass of CO2 Produced (g) 44 160 132 250 909 750 400 1,455 1,200 465 1,691 1,395 6. Based on the data in the table, how do you know that carbon dioxide is not the only substance formed in this chemical change?
*October 2, 2009*

**physics **

What average force in N is required to stop an 1,188 kg car in 9 s if it is initially traveling at 89 km/h? f=ma f=1,188(9.8) f=11642.4N This looks wrong to me. Can someone explain this to me.
*October 1, 2009*

**sanches**

A wire carries a 15 microampere current. How many electrons pass a given point on the wire in 1.0 ?
*September 28, 2009*

**health**

Write a 700- to 1,050-paper responding to the following: You have recently been employed by a small local hospital as an administrative assistant in the emergency room. The hospital does not provide any behavioral health services. You are assigned the task of gathering ...
*September 27, 2009*

**Economics**

Does a Contractionary Fiscal Policy help lower inflation? Or does Expansionary Fiscal Policy lower inflation?
*September 24, 2009*

**Chemistry**

How many grams are in a milliliter?
*September 21, 2009*

**MATH**

QUESTION: rounded to the nearest ten, i am 320, the sum of my digits is a multiple of 6 i am even.
*September 17, 2009*

**5th grade**

i re posted the question the way it is reading from my homework page. thanks for your help.
*September 17, 2009*

**5th grade**

i want to see if my answer is correct & that i am understanding this. question: round me to the nearest ten, i am 320 the sum of my digit is a multiple of 6 i am even. My Answer = 24 20 ten 24 2+4 =6
*September 17, 2009*

**chemistry**

Calculate the partial pressure of 24 g methane, 48 g of oxygen and 56 g of nitrogen contained in a 25L container. What is the total pressure.
*September 11, 2009*

**physics**

TY SIR. It extremely helped. I really appreciate your time..
*September 11, 2009*

**literature - 11th grade**

define "period structure
*August 10, 2009*

**Engineering**

A person rappels down a cliff. The person uses a 0.5 inch diameter rope, creating a 170-lb internal force. What is the normal stress in the rope. I got 340 by diving 170 from .5 is this right?
*August 7, 2009*

**Physics**

I got -2.84E14 plugged it in and got the wrong answer
*August 6, 2009*

**Physics**

A -3.5uC charge experiences a 13 ihat-N electric force in a certain electric field.What force would a proton experience in the same field? I got -7.28*10^-18 from (1.6*10^-19)(-45.5) I got -45.5 from multiplying 13 by -3.5 What am I doing wrong?
*August 6, 2009*

**Physics**

How do you do that
*August 6, 2009*

**Physics**

Take q1=23uC at (0,1), q2=16uC. at (2,0), and q3=? at (2,2). IF the force on q1 points in the -x direction, (a) what is q3 and (b) what is the magnitude of the force on q1? I know a is 16uC For part B I got .067 am I right I am using Coloumbs law k=9.0*10^9 q1=23*10^-6 q2=16*...
*August 6, 2009*

**Physics**

what will q be for both questions
*August 6, 2009*

**Physics**

A proton is at the origin and an electron is at the point x = 0.41 nm, y = 0.36 nm. Find the electric force on the proton. I got 7.529 *10^-11 but it wants the answer for fx and fy how do i get that?
*August 6, 2009*

**Physics**

There are two positive charges (+4C on the left and +6C on the right) that are both separated by an arbitrary distance. In order not to experience any net electric force where would you place the third charge. I say to the left of the +4C charge am i right?
*August 6, 2009*

**CHem**

How many oxygen atoms do you have in 2.00 grams of calcium phosphate? My answer is 3.9*10^22 by multiplying avogadros number by (2/31) Am I close? How many Ca^2+ ions do you have in 2.00 grams of calcium phosphate? I am getting 39, am i close? since there are 3 Ca2+ ions per ...
*August 5, 2009*

**Physics**

There is a flash of lighting that gives out a 25 C of negative charge from cloud to ground. Determine the amount of electrons involved? Do i use the formula F=qE I know one coulomb is 1.6 * 10 ^-19
*August 5, 2009*

**Chem**

How many oxygen atoms do you have in 2.00 grams of calcium phosphate? Do you use avogadro's number and how? How many Ca^2+ ions do you have in 2.00 grams of calcium phosphate? Any help would be greatly appreciated.
*August 5, 2009*

**Chem**

What is the name of Co2(C2O4)3 is it cobalt (2) tris ethanedioate
*August 4, 2009*

**Physics (Astronomy)**

Hi, what keeps objects in orbit, for example, preventing the moon from crashing into the earth under the force of gravity? I have read that it speeds up as it gets closer to earth but I don't understand why. Can someone help me? Thanks.
*August 2, 2009*

**Math**

375 is what percent of 500?
*July 25, 2009*

**communication**

What was your experience with the Center for Writing Excellence (CWE) in the past? In addition to the CWE, what other writing tools are available for revising a research paper? How can you become your own editor and review your writing with a critical eye?
*July 20, 2009*

**psych**

For this assignment, you will create a Microsoft® PowerPoint® presentation. Your presentation must briefly summarize how psychological disorders are classified including the role of the DSM IV. Your presentation must have at least one slide for each of the major ...
*July 20, 2009*

**Chemistry**

Hi!! Okay So I have this question here and you have to pick the false statement. Now I believe its a or e. But I really can't decide which it is. I might be totally wrong about this which is why I need some help... please! These are the options: a. the bond length is the ...
*July 3, 2009*

**Chemistry**

Hi! I have a question about Pi-Bonds: a. ) are the only kind of bonds present in double bonds b. ) have very little electron density along the internuclear axis c. ) are formed by endwise overlap of p-orbits d. ) are formed from hybrid orbitals e. ) are formed from s-orbitals ...
*July 2, 2009*

**maths 4th grade**

hello i need help with time table i really need help can you help because i really need help and i aslo need help with reading
*June 26, 2009*

**algebra**

we have a triangle with side a,b,&c. Side b=1,c=sqrt10 what is the length of side a?
*May 4, 2009*

**Monroe**

What do economist believe about future business cycles?
*May 4, 2009*

**algebra II**

Simplify. 2 square root 2(5 square root 10- 3 square root 2)
*April 30, 2009*

**Math**

I think there is supposed to be a few open spaces, maybe its we cant elope
*April 15, 2009*

**Algebra**

jon can type a report in 9 hours, nick can do the same job in 5 hours. How long would it take to type if they did it together?
*April 7, 2009*

**8th Grade Science**

Yeah,I've been wanting to ask that too.
*April 1, 2009*

**college al**

y=2x^3√9-x^2
*April 1, 2009*

**algebra**

find center and radius of circle with given equation: (x+4)^2 + (y-4)^2 = 25
*April 1, 2009*

**8th grade**

UH OH, Im getting this in grade 9 acedemic,
*April 1, 2009*

**9th grade weighte average**

how should i do weighted average
*March 26, 2009*

**Chemistry-Urgent Help Please**

What are the differences between -ate, -ide, -ite, and the other suffixes? What are some ways of remembering? Thank you for clarifying this.
*March 5, 2009*

**Chemistry**

What are the differences between -ate, -ide, -ite, and the other suffixes? What are some ways of remembering? Thank you for clarifying this.
*March 5, 2009*

**Math**

how did you get that. not rudely.
*February 23, 2009*

**Math**

dont get it
*February 23, 2009*

**Math**

The area of a rectangle is 90m 2. The base is three less than three times the height. What is the perimeter?
*February 23, 2009*

**12th grade Data**

In this sequence, tk is a factorial number, often written k!. Show that tk=k!=k(k-1)(k-2)...(3)(2)(1)
*February 23, 2009*

**CALC**

no one to help me?????
*February 3, 2009*

**CALC**

what is the arc length of y=x^4/8 + 1/(4x^2) [-1,-2] i have tried this many times but i am not achieving the answer of 33/16 which is supposed to be correct....much help is appreciated
*February 3, 2009*

**math**

(a) Use the Midpoint Rule and the given data to estimate the value of the integral I. (Give the answer to two decimal places.) I = int_0^3.2 f(x)dx 1 x f(x) x f(x) 0.0 7.3 2.0 8.8 0.4 6.8 2.4 7.3 0.8 8.1 2.8 7.6 1.2 7.6 3.2 7.3 1.6 8.2 (b) If it is known that -5 ≤ f'...
*February 3, 2009*

**Geography**

this didn't help me at all
*January 30, 2009*

**Geography**

i will just give you a pass
*January 30, 2009*

**6th grade_Science/Math**

hey get a life
*January 27, 2009*

**Math**

Josh and Mike live 13 miles apart. Yesterday Josh started to ride his bicycle toward Mike's house. When they met, Josh had ridden for twice the length of time as Mike and at 4/5 of Mike's rate. How many miles had Mike ridden when they met? (a) 4 (b) 5 (c) 6 (d) 7 (e) 8
*January 25, 2009*

**Statistics**

That answer is wrong
*January 24, 2009*

**Poetry (9th grade)**

This is a poem by Alice Walker and a question at the end but I can't figure out the question. Poem title: "Good Night, Willie Lee, I'll see you in the morning." Looking down into my father's dead face for the last time my mother said without tears, ...
*January 22, 2009*

**calculus**

lim x->(pi/3) (cos x -(1/2))/(x-(pi/3)) is?
*January 22, 2009*

**calculus**

o alright thank you drwls
*January 22, 2009*

**calculus**

is it 2ln 2?
*January 22, 2009*

**calculus**

Can someone help me with the problem? f(x)={ln 2x, 0<x<2 {2lnx, x >or= 2 The limit lim x-> 2 f(x) is?
*January 22, 2009*

**Physics**

thank you for that answer you are amazing!
*January 20, 2009*

**speech**

What are the 5 Communication acts?
*January 11, 2009*

**language arts**

analogie for broom is to sweep as brush is to?
*January 6, 2009*

**Math**

5x-14=8x+4
*January 6, 2009*

**IT Programming in South Africa for a 2007 matric..**

IT Programming in South Africa for a 2007 matriculant? I matriculated 2007 with a Senior Certificate : HG Afrikaans 2nd Lang 45% HG English 1st Lang 51% SG Maths 66% SG Science 49% HG Biology 44% SG Computers 62% And I have experience with ms-dos, vbscript, javascript, css, ...
*January 3, 2009*

**Algebra (y=kx)**

just read my other question and u will find the question. but i really need he- lp!!!!!!!!!!!!!!!!!!!!!!!!!!!
*December 7, 2008*

**math**

ho do i make a y=k x problem with facts like: exports $465.3 billion and imports 402.4 billion?
*December 7, 2008*

**Science**

definatley c
*December 7, 2008*

**chemistry II**

I search the web and my texbook doesn't have the answer so please help What are the four steps of a process involving a heterogeneous catalyst?
*December 3, 2008*

**8th Grade Algebra**

just go 2 google and google it!
*December 2, 2008*

**4th grade**

2-1=1
*November 25, 2008*

**9th grade**

Need help with (x+5)(3xsquared-2x+1)
*November 13, 2008*

**math**

The scientists Verhulst (1828) where is the natural growth rate of the population when resources are limited and is a positive constant called carrying capacity of the environment. (a) Using sign analysis, find all constant solution and discuss the general behavior of solution...
*November 6, 2008*

**math**

The scientists Verhulst (1828) and Peal (1930) proposed the following growth model for a population living in an environment with limited resources (e.g. space, food, sunlight, etc): = , where is the natural growth rate of the population when resources are limited and is a ...
*November 6, 2008*

**math**

The scientists Verhulst (1828) and Peal (1930) proposed the following growth model for a population living in an environment with limited resources (e.g. space, food, sunlight, etc): = , where is the natural growth rate of the population when resources are limited and is a ...
*November 6, 2008*

**edisto**

What percent of 105 is 70?
*October 30, 2008*

**Math riddle PIZZAZZ Worksheet**

i need help on my home work a-72
*October 30, 2008*

**Math**

Find all the points of intersection of the surfaces whose equations are as follows: z^2 = 2xy - 100 and x^2 + 2y^2 - 100 --------------------- 2y
*October 20, 2008*

**Math**

Find all the points of intersection of the surfaces whose equations are as follows: z^2 = 2xy - 100 and x^2 + 2y^2 - 100 ---------------- 2y
*October 20, 2008*

**EARTH SCIENCE**

i messed up were i put a plus theres supposed to be =
*October 19, 2008*

**EARTH SCIENCE**

i have to do a packet and i cant under stand it. it says ' sea level 10 degrees = 1 atmosphere and then i have to do tropopause ,stratapause and mesopause and the rest of it says . an atmosphere is a unit of air pressure . 1 atmosphere +average air pressure at sea leve ...
*October 19, 2008*

**math**

Add 9+5 first then Subtract 2 minus 4 and once you get both of those answers subtract them (9+5)-(2-4) 14 - 2 =12
*October 8, 2008*

**math**

how do you work out bearings for y8 maths homework
*September 29, 2008*

**algebra**

multiple 2 into the brackets then solve for m
*September 28, 2008*

**Science & Art - Gr 12 (correction)**

As someone has already stated, this energy would probably be plasma energy, not electricity.
*September 15, 2008*

**Science & Art - Gr 12**

Note : All feedback will be greatly appreciated! Hey guys, thanks for the help earlier on about the "invisibility cloak". Anyway, I'm interested to know how one would go about generating a fairly independant sphere / ball of pure plasma / electric energy ...
*September 15, 2008*

**Science & Art - Gr 12**

Awesome you guys.
*September 14, 2008*

**Science & Art - Gr 12**

Hey SraJMcGin, Haha, yes. It certainly does raise some questions! D:
*September 14, 2008*

**Science & Art - Gr 12**

Invisibility. I've been reading all over the place about this, but mostly sensational. Some, however, state that the Government has been working on a sort of "invisibility cloat" for military, air force and marine tactics. But get this, it works on the basis that...
*September 14, 2008*

**Science & Art - Gr 12**

Hi Ms. Sue, I am not a frequenter of Jiskha, and not that familiar with how it works. So please bear with me. Having said that, thanks for the input.
*September 13, 2008*

**Science & Art - Gr 12**

Does anyone know some of the physics behind this or is it too advanced?
*September 13, 2008*

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