Wednesday

April 1, 2015

April 1, 2015

Total # Posts: 103

**Science**

Portfolio: you will design an experiment to investigate the relationship between the number of cool loops and the strength of a solenoid. Once you have an experiment plan carry out your experiment and record your data. After you have finished conducting the experiment, write a...
*April 1, 2015*

**Sciene**

Portfolio: you will design an experiment to investigate the relationship between the number of coil loops and the strength of a solenoid. One you have an experiment plan, carry out your experiment and record data. After finishing conducting experiment, write a conclusion that ...
*April 1, 2015*

**Chem**

how many millimeters of 0.200M FeCL3 are needed to react with an excess of Na2S to produce 1.38g of Fe2S3 if the percent yield for the reaction is 65.0%
*March 8, 2015*

**math**

the width of a rectangle is one third of the length. of the perimeter is 40 cm find the dimension of the rectangle
*November 10, 2014*

**Science 8A Electromagnetism**

I need the answer to this?
*October 27, 2014*

**math**

A 12 qrt. cooling system is checked and found to be filled with a solution that is 40 % antifreeze. The desired strength of the solution is 60% antifreeze. how many quarts of solution need to be drained and replaced with pure antifreeze to reach the desired strength.
*August 31, 2014*

**math**

regular milk has 4% butterfat. How many litres of regular milk must be mixed with 40 L of milk with 1% butterfat to have milk with 2% butterfat?
*August 31, 2014*

**URGENT Physics help**

An attractive force of 7.2 N occurs between two point charges that are 0.10 m apart. If one charge is 4.0 µC, what is the other charge? (µC = 1.0 × 106 C) (Points : 3) 1.0 µC 2.0 µC +1.0 µC +2.0 µC Which substance is most easily ...
*May 7, 2014*

**Mathematics**

How would i go about tranposing this equation so that I end up with a value for x? Please include working. Thankyou 315.414=2πx^2+860.16/x
*April 26, 2014*

**Maths**

Please help me to understand transposing equations. In this example I need to find y x^2=y^2-r^2/y^2 Thank you for your help
*February 9, 2014*

**Physics**

we have to transpose the following equation to find p, but I dont quite understand how to come up with the correct answer: x^2/p^2 + y^2/q^2 = 1 Appreciate help, thanks
*February 5, 2014*

**Math**

1)61,443.88 2)510,674.71 3)84,887.22 4)11,3875.44 5)2,441.71
*February 4, 2014*

**Math**

Suzanne bought 50 apples at the apple orchard.she bought 4 times as many red apples as green apples.how many more red apples than green apples did Suzanne buy?
*November 14, 2013*

**college history**

The evolution of the socio-political and cultural milieu that created the conditions necessitating and including the formation of the: (a) Declaration of Independence (b) the Constitution (including the Bill of Rights)
*October 19, 2013*

**Maths/Physics**

An athlete is training and is required to perform shuttle runs. From the starting position they sprint out to 10m (this takes 2 seconds). I know that a = 5m/s/s but I need to know at what metre within the run would maximum acceleration occur. Appreciate your help. thanks
*August 29, 2013*

**Physics URGENT HELP**

Thankyou, but I need to establish where within the run max acceleration occurs (what metre mark?)
*August 29, 2013*

**Physics URGENT HELP**

An athlete is training and is required to perform shuttle runs. From the starting position they sprint out to 10m (this takes 2 seconds). Where would the maximum acceleration occur? Justify your answer. Please help! Thankyou.
*August 29, 2013*

**Physics**

An athlete is training and is required to perform shuttle runs. From the starting position they sprint out to 10m (this takes 2 seconds). Where would the maximum acceleration occur? Justify your answer. Please help! Thankyou.
*August 29, 2013*

**Maths**

The first term of an AP is 3 and the eleventh term is 18.find the number of terms in the progression if the sum is 81.
*August 28, 2013*

**Maths**

On Saturday Derek picked pears from 32 trees. His picked average of 17 pears per tree. Sunday he picked more pears averaging 12 pears per tree. Over the whole weekend he picked an average of 14 pears per tree. How many trees did Derek pick from on Sunday? Please help with this...
*July 25, 2013*

**math **

ellen bought 4 1/4 yards of fabric for $3.25 per yard. how much was ellen charged for this fabric. I know 4x 3.25 is 13.00 dollars so far how do I get the rest solved help I have a bunch more like this
*April 28, 2013*

**Math**

The mean of three test scores is 74. What must a fourth test score be to increase the mean to 78?
*January 4, 2013*

**Chemistry**

Energy Level Transfer of Hydrogen's electron. For each line, determine the prinicpal energy level to which hydrogen's electron was excited. When the electron fell to the 2nd level, energy was released corresponding to each of the lines. E= 2.179X10-18 (1/n2 lo- 1/n2 hi...
*November 7, 2012*

**Biology**

11) The recent Nobel Prize in Physiology or Medicine was awarded based on two sets of experiments. The first of these is described in the following abstract: An important problem in embryology is whether the differentiation of cells depends upon a stable restriction of the ...
*October 15, 2012*

**Biology**

Compare and contrast fertilization in the mouse and the sea urchin – how they similar and how do they differ (and why?). Think about the structures, events and results. You might want to do this by breaking down the steps. Also address the key role of Ca2+.
*October 15, 2012*

**Biology**

Describe the process of gastrulation in the sea urchin – what molecular and cellular changes are needed to drive the movements that one observes?
*October 15, 2012*

**Biology**

We looked at four different families of signal transduction cascades. Describe three general, common features that are, in some way, part of each of these cascades.
*October 15, 2012*

**Biology**

3) The following statements are generalizations about cell signaling events made by a student with a basic knowledge of biology (a little knowledge is a dangerous thing). Your professor has requested that you tutor this student. You note that in each case there are several ...
*October 15, 2012*

**health**

hi do anybody know the ansner to this question??
*July 9, 2012*

**business english**

many organizational situaions involve an audience that consists of a group of people. which is an appropriate approach to analyzing this type of audience? a. rely on the fact that generalizations are true for all members of a group b. disregard demographic information to avoid...
*March 29, 2012*

**Chemistry**

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 59.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse osmosis stops? ...
*February 18, 2012*

**Chemistry**

Based on crystal field theory, which of the following metal ions will not be colored when placed in an octahedral crystal field? Au+ Fe3+ Ag+ Au3+ Nb3+
*November 9, 2011*

**Alg. II**

Factor completely: 54+16x^3
*October 27, 2011*

**grammar**

3.She is tender to percussion and palpation over the right lower quadrant. over is the preposition, is to also a preposition in this sentence
*June 15, 2011*

**calculus**

This is what I got.. 25(1/2)^(t/20)=10 (1/2)^(t/20)=10/25=2/5 (1/2)^(t/20)=2/5 t/20=log(2/5)/log(1/2) t=20(log(2/5)/log(1/2)) t=26.44 Is this correct?
*February 17, 2011*

**calculus**

How do I set-up/solve this problem? Please help me. The half-life of the radioactive isotope gallium-70 is 20 minutes. If the initial amount of gallium-70 is 25 milligrams, when will 10 milligrams be left?
*February 17, 2011*

**MATH: Pre-Cal/Trig**

The length of a rectangular flower garden is 6 more feet than its width. A walkway 3 feet wide surrounds the outside of the garden. The total area of the walkway itself is 288 square feet. Find the dimensions of the garden.
*January 29, 2011*

**Mathematics**

37.8 degrees
*January 26, 2011*

**trigonometry. Math**

In a triangle PQR, angle Q=50 degrees,PR=5CM, QR=4CM. find angle P?
*January 26, 2011*

**Physics**

T = 16 s/ 13 = 1.23 s T = 2pi sq rt (m/k) 1.23 = 2 pi sq rt (.21 g/k) k = 5.473
*January 21, 2011*

**reimbursement methodologies**

shannon. can you pls help me with my project. my e-mail is zahidem17.yaho please return back to me thank you
*January 4, 2011*

**chemistry**

equation of the reaction of hydrochloric acid and iron sulphide
*November 29, 2010*

**Reimbursement Methodologies**

Hi Alex.im also having problems with same problem you had can you contact me please. my email is zahidem17..yaho
*November 26, 2010*

**Organic Chemistry**

what is wrong with the idea that the reaction of maleic acid with zinc and aqueous HCL would yield tetrahydrofuran?
*October 30, 2010*

**college physics,electric potential**

Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square? V? Please show me how to solve this.Thanks
*October 2, 2010*

**physics**

Two point charges are located as shown in the figure, with charge q1 = +3.2 C at x = − 3.0 m, y = 0, and charge q2 = +2.5 C at x = +1.0 m, y = +2.0 m. An electron is now taken from a point very far away and placed at the origin. How much work must be done on the electron...
*October 2, 2010*

**physics**

Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square? 1 V
*September 29, 2010*

**physics**

Two point charges are located as shown in the figure, with charge q1 = +3.2 C at x = − 3.0 m, y = 0, and charge q2 = +2.5 C at x = +1.0 m, y = +2.0 m. An electron is now taken from a point very far away and placed at the origin. How much work must be done on the electron...
*September 29, 2010*

**physics**

How much work (as measured in joules) is required to push an electron through a region where the potential change is +73 V? Assume the electron moves from a region of low potential to a region of higher potential. 1 J
*September 29, 2010*

**English**

Is there always both an antagonist and protagonist in a story or can there just be a protagonist. The book that I'm talking about is New shoes for Sylvia and I only think there is a protagonist
*September 16, 2010*

**English**

Sees Behind Trees I'm doing a five paragraph essay on three different themes in the book but the main one is to never let a disability stop you from making a difference
*September 16, 2010*

**English**

What is a creative title for my paper. I'm doing on theme for a novel. We can't use the title of the book as the title of our paper? I can't come up with anything.. Any suggestions would be helpful
*September 16, 2010*

**English Quick?**

Why is theme important? Is there a theme in every piece of literary writing?
*September 16, 2010*

**Geography**

New diseases introduced by Europeans (many of which had originated in Asia), to which the indigenous peoples of the Americas had no immunity, depopulated many cultures. ( Does this go under the long term economic development of Latin America or Europe)
*September 15, 2010*

**Geography**

how did the columbian exchange affect the long term economic development of Latin America?
*September 15, 2010*

**Chemistry**

What is the molar hydronium ion concentration in solutions with pH values of a) 3.45 and b) 10.290. How do you work these problems?
*May 6, 2010*

**English**

This is my whole poem. My poem dosen'thave to rhyme. The Green Team is like an angel,dancing through the beautiful blue sky. It is a miracle having Dearbhail,Amber,Stacey, Marina,Kudzayi and Sophie in Catherine. We work as a Team with no Fight's or unhappeness. I was ...
*February 22, 2010*

**English**

Helllo I writing a poem about my p.e.team,can you please read my work and say what you think about it.Thanks I was delighted when I found out I was in Catherine Because Green was my favourite colour.
*February 22, 2010*

**Essay (conclusion)**

IN CONCLUSION, I THINK JUST DOING A HOMEWORK WOULD HELP YOU SUCCEED IN LIFE.
*January 23, 2010*

**Trig**

Are any of these three problems identities? 1. Cos^2x-sin^2x=1-2sin^2x 2. Sinxsecx=cosxcscx 3. Sec^4x-tan^4/sec^2x=1+sin^2x If so, how can you conclude that any of them are identities?
*January 3, 2010*

**Trig**

Are any of these three problems identities? 1. Cos^2x-sin^2x=1-2sin^2x 2. Sinxsecx=cosxcscx 3. Sec^4x-tan^4/sec^2x=1+sin^2x If so, how can you conclude that any of them are identities?
*January 3, 2010*

**math**

if a group of students are facing each other in a circle and student 2 is facing student 9 how do i find out how many students are in the circle
*December 3, 2009*

**i meant PHYSICS.**

subject = physics
*October 24, 2009*

**MELODY**

The parachute on a race car of weight 8850 N opens at the end of a quarter-mile run when the car is traveling at 31 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1000 m? [so for this one, i need to know the mass and ...
*October 24, 2009*

**math115**

Kristi jogged for 1/4 of an hour swam for 2/3 of an hour and rode her bike for 4/5 of an hour how long did she exercise? answer 1 hr 43 min Find the best buy on sugar (1LB is 16oz. )1 lb for $1.29, 12oz for $1.09 2 lbs 4 oz for $3.09 10 oz for $.99 answer 1 lb. for $1.29
*October 20, 2009*

**math115**

which numbers are prime numbers 37,39,41,43 answer 37,41,43 John spent 1/3 of his study time doing math homework and 3/5 preparing for a history exam what fraction of his study time remains? answer 1/15 Solve for the unknown 2/7/20=1.6/ranswer 112
*October 20, 2009*

**Social Studies (9th grade)**

Thanks:)
*October 15, 2009*

**Social Studies (9th grade)**

How did the Trojan War affect people of its own time and our world today? Thanks so much:]
*October 15, 2009*

**Math**

I have another question I am stuck on that follows a previous question. How do I get an equation for the height of the car on the ferris wheel over a 10 minute period if we start the analysis one minute into the ride. Can I still use the original formula h = -35cos(2pi*X/5)+37...
*October 15, 2009*

**Math**

Hi, this is a question I posted a couple of days ago and answers below.I am still really confused and unfortunately can't copy a picture into this. I thought it would be y-x but have no idea how to calculate that, but as the pistons move in towards each other, wouldn't...
*October 15, 2009*

**Maths**

Two pistons A & B move backwards and forwards in a cyclinder. Distance x cm of the right hand end of piston A from point 0 at time t seconds is x=3sin(2t)+3 and the distance y cm of the left hand end of piston B by formula y=2sin(3t-pi/4)+8.5 The pistons are set in motion at t...
*October 14, 2009*

**Maths**

Many thanks, I understand that now. I have another question I am stuck on also. How do I get an equation for the height of the car on the ferris wheel over a 10 minute period if we start the analysis one minute into the ride. Can I still use the original formula h = -35cos(2pi...
*October 13, 2009*

**Maths**

I have a trig question regarding a ferris wheel, radius 35m, axles 37m, clockwise direction, rotates twice every 10 mins. I have calculated the following function: h = -35cos(2pi*X/5)+37 I have calculated at what height I would be after 3 minutes by substituting X=3 in the ...
*October 13, 2009*

**Math 116**

The formula R= -0.075t + 3.85 can be used to perdict the world record in the 1500 meter run, t years after 1930. Determine an inequality that identifies the years in which the world record will be less than 3.4 minutes. Soleve for t. t >__? round to the nearest whiole number.
*October 2, 2009*

**english**

- There are many different reasons why poverty occurs and as such there are many different avenues to pursue in the eradication of poverty
*March 30, 2009*

**social studies**

why was the Great Wall of china build?
*March 12, 2009*

**science**

What is the Rf value for DDT pesticide?
*February 8, 2009*

**history**

i was wondering if any one could give me any ideas on these essay tasks: (i)How did world War 1 affect Australia's history? (ii) Explain what the industrial disputes of the 1920's showed about the problems facing Asutralian society during this decade. I really need ...
*October 3, 2008*

**science**

If the weight of a vehicle is doubled, would the deceleration of the vehicle be doubled? For example if a car decelerated at 6m/s, would a car double the size, decelerate at 12m/s or is their some other factor involved? Thanks for your help
*May 17, 2008*

**Science**

Thanks again for the help, I am now getting there with my assignment. Just one more question though. If I doubled the weight of the car, would the deceleration rate change from 6m/s to 12m/s?
*May 16, 2008*

**Science**

Thanks for your reponse, it helped greatly. Can you please also tell me if the braking distance is 24metres and it decelerates at rate of 6m/s, does that mean that the time taken to stop after braking would be 4 seconds or do I need to consider anything else to calculate time.
*May 16, 2008*

**Science**

I am working on a year 10 physics assignment on road science. I am trying to figure out the reaction distance of a car with: Skid marks = 24m Reaction time = 1 sec Decelaration rate = 6m/sec I have many formulas in my book and am unsure of which one to use and what the correct...
*May 16, 2008*

**accounting**

yes it is
*April 1, 2008*

**Sose**

I am researching fire ants for an assignment and need a map of where they were first introduced in Australia and where they have now spread in Australia. I have searched everything imaginable on google and found nothing. Can you please help me?
*March 30, 2008*

**science**

A radio acoustic sounding system (RASS) instrument uses 404-MHz radio waves (wavelength = 0.743 m). (a) What is the wavelength of the sound waves used to measure air temperature? ë = ___ m (b) If the Doppler shift of the radio wave reflected from a region several hundred ...
*February 13, 2008*

**Physics**

The coldest and hottest temperatures ever recorded in the United States are -80°F (211 K) and 134°F (330 K), respectively. What is the speed of sound in air at each temperature? _____m/s at -80°F _____m/s at 134°F
*February 13, 2008*

**music**

Can you please post all the music theory intervals? It is for Rudiments 1 and 2 please. Like perfect 5th and augmented 6th. Thanks
*January 30, 2008*

**science**

Please help me with these questions I have looked all threw my book but i cant find them. 7. Why are we not sure about the interior of the earth? Do we know for sure why? 12. Some volcanoes are more explosive than others? What makes this diffrence in explosivity occur? 14.What...
*January 19, 2008*

**math- check this please**

I need to know what is 4.72 in expanded form please
*November 19, 2007*

**Algebra**

solve linear equation-an alloy of metal is 25% copper. Another alloy is 50% copper. how much of each alloy should be used to make 1000 grams of an alloy that is 45% copper
*October 19, 2007*

**cultural diversity**

What are some measurements used by sociologists to calculate prejudice. http://www.jiskha.com/search/search.cgi?query=sociologists You'll find previous responses to this same question among the links here. =)
*May 25, 2007*

**math**

I need help figuring out these four euations with integers 5x=-25 6x-4=-40 x - +5=0 is this one 3 -x+7=-7 isnt this on 14 please help thank you very much OK, for the first one (5x=-25), you would go: -25 divided by 5, and that equals -5. The second one is a two-step equation. ...
*April 23, 2007*

**fish**

I think the michigan fish is either blue gill or sun fish? Am I right. If not what is it. I believe that it is the Rainbow trout According to this site, Michigan's state fish is the brook trout. http://www.enchantedlearning.com/usa/states/michigan/
*March 28, 2007*

**launguage arts**

What does Adhere mean?? stick to to stick to Here are some good online dictionaries you can use when you need them: http://www.answers.com http://www.onelook.com http://www.yourdictionary.com =)
*March 27, 2007*

**early childhood education--need help!!**

I need help with this question. Mr. White is having circle time with his first grade class. He is discussing the "th" blend and what words can be made by using this sound. He notices that after about five minutes, Mike is getting restless and not staying in his spot....
*January 16, 2007*

**guidance and discipline**

Miss Vickers second grade class is having a great time with math centers. They are seated where they are comfortable,some on the floor and some at tables.The students are working with manipulatives they chose from the math shelves. They are talking quietly and recording their ...
*January 12, 2007*

**Guidance and Discipline Question**

Focusing on the person and their strengths and abilities is a way adults and children can help a child with ____________ adjust to the classroom. 1. special needs 2. behavior problems Wouldn't it be special needs? I am confused, because my friend says I am wrong. She says ...
*January 12, 2007*

**Discipline and Guidance**

Two children are fightining over the blue marker. According to constructivist discipline, what is the best approach for the caregiver in this situation? A. Take the blue marker from both children and tell them to clean up their work,since they cannot get along. B. Stand back ...
*January 11, 2007*

**Discipline Question- PLZ HELP**

Which statement about positive and negative attention is true? A. Giving a child negative attention will create a well-rounded adult who is confident B. A child who seeks positive attention will never try to get negative attention. C. Positive and negative attention must be ...
*January 11, 2007*

**World History Paper**

the french revolution occured when it established the National assembly
*December 6, 2006*