Friday

November 28, 2014

November 28, 2014

Total # Posts: 102

**Physics**

The electrons that produce the picture in a TV set are accelerated by a very large electric force as they pass through a small region in the neck of the picture tube. This region is 1 cm in length, and the electrons enter with a speed of 1 × 105 m/s and leave with a ...
*September 29, 2014*

**Analytical CHM Lab**

I am filling out my neutralization titration data sheet and i did not understand how to find buret correction (ml) and corrected volume(ml) and Molarity of NaOH without buret correction and as well as with buret correction. in the lab we have used 50 ml of buret for KHP mass(g...
*September 19, 2014*

**Analytical CHM**

Calculate the theoretical amounts of 0.1000 M NaOH titrant used to titrate 0.8 and 0.9 g KHP Please show step by step solution , i need the correct significant figures and units to finish up the rest of the lab correctly i found the answer but for some reason ,using my answers...
*September 15, 2014*

**ANALYTICAL CHM**

What are the possible sources of error in using a graduated pipet? in using a buret?
*September 6, 2014*

**Math**

John has 5 computer games. Julian has twice as many computer games as John. How many computer games do they have in all?
*August 6, 2014*

**math**

A country seen its population grow each year in the eighth of what it was the previous year. At that time the population is successfully a. duplicate b. triplicate
*June 10, 2014*

**math**

A businessman invested 10000 dollars in bonds paying annual interest of 8%. If you invest the proceeds in the purchase of new bonds, which will have the capital after 10 years
*June 10, 2014*

**math**

A person a pair of shoes is purchased each year and has noticed that the price has increased as a geometric progression. If the price increase in the last two years was 25 dollars and in the last year was 15 dollars. a. What was the price of the pair of shoes two years ago. b...
*June 10, 2014*

**math**

For a soccer game has been on sale 4 types of locations. The ticket prices for different locations form a geometric progression. If a person bought a ticket for each locality would spend 32.5 dollars and would see that the price of the most expensive is 3,375 times the price ...
*June 10, 2014*

**math**

A bottle containing 10 liters of alcohol one liter of alcohol is removed and replaced with water. After a liter of the mixture was removed and replaced with water, the operation being carried out 7 times in total. Then that amount of alcohol remains in the container.
*June 10, 2014*

**physics**

Two cars, A and B, travel in the same direction on a straight section of highway. A has a speed of 69.5 km/h, and B a speed of 84.3 km/h (both relative to the earth). (b) If A is initially 394 m in front of B, how long will it take for B to reach A?
*May 28, 2014*

**Math**

A small plane flying a banner in the shape of a rectangle the area of the banner is hundred and 44 square the width of the banner is one fourth the length of the banner what are the dimensions of the banner
*February 24, 2014*

**Math **

Find two numbers, x and y, such that 10% of x is the same as 40% of y. Explain!
*February 6, 2014*

**Math PLZ HELP!!!!**

A tank that holds 4000 gallons of water will drain completely into a reservoir in 32 minutes. The volume of remaining water in tank after time t is given by the function: V(t)=4000(1-t/32)^2, 0<t<32 The amount of water in reservoir depends on how much water has drained ...
*December 18, 2013*

**math**

Given the function f(x) =2^x and g(x) =x-2 and h(x) =2x-3 what compositions of function will result into y= 2^(x+1)-5
*December 17, 2013*

**math**

Do relations that are functions always have symmetry? Explain your answer.
*December 17, 2013*

**math**

You make a purchase at a local hardware store, but what you've bought is too big to take home in your car. for a small fee, you arrange to have the hardware store deliver your purchase for you. You pay for your purchase, plus the sales taxes, plus the fee. The taxes are 7....
*December 17, 2013*

**Math**

Is f(x)= -x/x^2-1 odd, even or neither of the two functions?
*December 15, 2013*

**Math**

Complete the square to find the vertex of each quadratic function. State the vertex. y=-x^2+5x-3 y= 5x^2+1/5x-10 2x^2+8x-2
*December 13, 2013*

**Math**

Find four consecutive integers, such that the product of the first and second integer minus 2 is equal to 3 times the product of the third and fourth integer.
*December 10, 2013*

**Math**

I meant find j
*December 10, 2013*

**Math**

If 4-jx-x^2 is divided by x-4 the remainder is -4. Find k.
*December 10, 2013*

**Math**

Factor: (x^3)(z^6)-27y^9 81x^4-16y^4 2x^3+16y^3
*December 10, 2013*

**Math**

Complete the square to find the vertex y=5x^2+1/5x-10
*December 10, 2013*

**Math**

Determine the remainder of the following polynomial by remainder theorem. x^3-4x^2+x-6 divided by x+2. If x+2 is a factor, determine the remaining factors.
*December 9, 2013*

**Math**

No I was just making sure. Thanks
*December 9, 2013*

**Math**

Find the equation of the curve that joins the following points. Hint: Use common differences. a. The zeros of the function are 3,-1,-5. The y-intercept is 15. Find the function. b. (1,1), (0,1), (2,-5), (-1,-5)
*December 4, 2013*

**Trigonometry**

Given the equation 2cos^2x+sinx-1=0 1. Explain why this equation cannot be factored. 2. Use a trigonometric identity to change the equation into one that can be factored.
*November 24, 2013*

**Trigonometry**

Thank you for your help. It's just that I didn't take functions in grade 11 and now I'm taking Advanced Functions in grade 12 and I'm difficulty with. Thanks for your help though.
*November 24, 2013*

**Trigonometry**

Prove the following trigonometric identities. please give a detailed answer because I don't understand this at all. a. sin(x)tan(x)=cos(x)/cot^2 (x) b. (1+tanx)^2=sec^2 (x)+2tan(x) c. 1/sin(x) + 1/cos(x) = (cosx+sinx)(secx)(cscx) d. tan^2 (x)(1+1/tan^2 x) = 1/(1-sin^2x) e...
*November 24, 2013*

**Trigonometry**

Solve for the following equation to the nearest degree if needed for 0 less than equal to x less than equal to 360. sin^2x=cosx 2sin^2x+cosx-cos^2x=0
*November 21, 2013*

**Math**

There are approximately 131,000 cases of colorectal cancer in the US each year ( data as of 1998). The US pop is approx 270 million. What's is the probability that a randomly selected person in the US will develop this type of cancer during a year? What method of assigning...
*April 6, 2013*

**Numerical Analysis**

show that f(x)=xsinπx-(x-2)lnx has at least one zero derivative in [1,2]
*November 2, 2012*

**Numerical Analysis**

show that the equation xcosx-2x2+3x-1=0 has at least one solution in [0.2,0.3]
*November 2, 2012*

**Numerical Analysis**

Use Taylor series expansions (zero through fourth order) to predict f (2) for f (x) = ln(x) with a base point at x = 1. Determine the true percentage relative error for each approximation.
*November 2, 2012*

**Numerical Analysis**

We know that e (base of the natural logarithm) is 2.7182818. If we estimate this number with XA = 2.71828, what is the significant number of digits that XA approximates the e?
*November 2, 2012*

**Numerical Analysis**

Use Taylor series expansion (degree 0 to 6) about x’=pi/4 to find an approximation for f(x) = cosx at point x=pi/3 and then compare the result with the exact data
*November 2, 2012*

**Socail Studies**

Of the problems experienced by the Confederation Congress, which do you think was the most harmul? and why
*March 6, 2012*

**Physics**

If a thunderstorm is heard 5 seconds later. How far away did the lightning strike?
*February 28, 2012*

**physics**

Two carts with masses of 4.3 kg and 3.0 kg move toward each other on a frictionless track with speeds of 5.7 m/s and 4.4 m/s, respectively. The carts stick together after colliding head-on. Find their ﬁnal speed. Answer in units of m/s
*January 30, 2012*

**science**

is the answer 31.6 or 1000 for the first answer
*November 30, 2011*

**science**

a car of mass 800kg is travelling at a steady speed. the kinetic energy of the car is 160 000 J. show carefully that the speed of the car is 72 Km per hour
*November 30, 2011*

**science**

an oil tanker has a mass of 100 000 tonnes. its kinetic energy is 200 MJ.Calculate its speed. (1Tonne=1000kg, 1 MJ= 1 Megajoule= 1 000 000 J) PLEASE HELP
*November 30, 2011*

**english**

I need help
*September 22, 2011*

**French I**

We're supposed to complete with the indicated verb. 1. Romain et Christophe _______ un vol Air France. (choisir) 2. Quand Romain fait enregistrer ses bagages, il _______ aussi sa place. (choisir) 3. Pendant le voyage, les deux garcons ont faim. Ils _____ tout leur repas. (...
*April 21, 2011*

**english**

what would be the word it identifies or descride would it be name
*March 8, 2011*

**english**

name, lewis carroll
*March 8, 2011*

**english**

what is the appositive inthis sentences Charles Lutwidge Dodson is better known by his pen name,Lewis Carroll.
*March 8, 2011*

**science**

Oil and Water Go Kaboom!
*February 27, 2011*

**physics**

a plank of mass 5kg is placed on a frictionless horizontal table. further a block of mass 2kg is placed over the plank. A mass-less spring of natural length 2m is fixed to the plank by its one end. The other end of spring is compressed by the block by half of its springs ...
*January 16, 2011*

**chemistry**

balance the following equation by half reaction method in an acidic medium: C3H8O + MnO4^- gives off C3H6O + Mn^2+
*January 13, 2011*

**physics**

Consider a square ABCD of side 10cm and total mass 10kg. Let O be the center of the sqaure. We cut a square of corners O and C. Find the central mass of the obtained shape after removing the small cutten sqaure.
*January 6, 2011*

**math**

please I desperately need an answer!!
*January 1, 2011*

**math**

In a factory of electronic items, the total cost of production, expressed in thousands of dollars, is given by the function C(x)= (x^2-x+2)/x+1 where x belongs to [0;5] and expressed in hundrends of items produced. 1) calculate in dollars the total cost of production of 400 ...
*January 1, 2011*

**calcus/ math**

Nick has enough wire to construct a 100m of fence. he wish to use it to form three sides of a rectangular garden,one side is along his building. 1)What dimensions should be choose in order to enclose the largest possible area? 2)Verify the result thus obtained by graphical ...
*December 28, 2010*

**Finance**

If you bought a share of common stock, you would probably expect to receive dividends plus an eventually capital gain. Would the distribution between the dividend yield and the capital gains yield be influenced by the firm's decision to pay more dividends rather than to ...
*December 1, 2010*

**Finance**

Fletcher Company's current stock price is $36.000, its last dividend was $2.40, and its required rate of return is 12%. If divends are expected to grow at a constant rate, g, in the future and if Rs is expected to remain at 12%, what is Fletcher's expected stock price ...
*December 1, 2010*

**Physics**

i dont know it i need help !
*October 23, 2010*

**physics**

A block is projected up a frictionless inclined plane with initial speed v0 = 1.92 m/s. The angle of incline is è = 12.2°. (a) How far up the plane does it go? (b) How long does it take to get there? (c) What is its speed when it gets back to the bottom?
*October 11, 2010*

**physics **

An electron with a speed of 1.1 × 107 m/s moves horizontally into a region where a constant vertical force of 3.6 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the time it ...
*October 11, 2010*

**COM220**

Strategies for gathering information Appendix D Is the source the name of the article or the reference who wrote it. What goes in the source box?
*February 8, 2010*

**math**

Im greater than 99 but less than 1000, two of my digits that are not next to each other are the same, my tenth digit can't be greater and is more than my hundreths digit. What number am I?
*November 17, 2009*

**5th grade History**

because men felt women didnt have the right to vote and belonged cooking and cleaning and so on
*November 10, 2008*

**math**

if 2f(p)=20 then f(p)= 10 so, f(3p)=3*10 f(3p)= 30 i hope this helps!
*October 28, 2008*

**math**

thank you!!!!!!!!!!!!!!!!!!
*October 28, 2008*

**math**

Can you tell me the answer to: 3 1/2 = ______x 4 3/8. I keep coming up with 1 1/4 but it doesnt work out when I multiply it back. HELP!!!!
*October 28, 2008*

**english**

What a most delightful quatrain Jamie has written. In the above sentence i need to identify the subject. I dont know if its quatrain or Jame. And I also need to tell what the form of the verb is. I think the verb is has written and if so is that irregular?
*October 2, 2008*

**child care**

hello i need some help with those questions (the legal requirements relevant to inclusive practice.) and the importance of inclusive practise in a pre school setting. thank you
*September 30, 2008*

**english**

When did you memorize the patriotic poem, "Paul Reveres ride"? In the above sentence is the predicate did memorize? If so what part of the sentence would the word poem be??
*September 25, 2008*

**english**

new england modifys states??????????
*September 25, 2008*

**english**

Many notable poets often lived in the New England states. In the above sentence i need to identify the subject modifiers in the sentence and the descriptive adjectives. I believe the adjectives are New England, many and notable. What then would be the modifier of the subject? ...
*September 25, 2008*

**english**

Thank you but could you also tell me then what the subject modifiers are in the sentence.
*September 24, 2008*

**english**

Many notable poets often lived in the New England states. In the above sentence i need to identify the subject modifiers and the descriptive adjectives in the sentence. I believe poets is the subject so would many and notable be the modifiers and if that is right then what ...
*September 24, 2008*

**english**

wow didn't know that one, thanks!
*September 24, 2008*

**english**

Invite Jim on our fishing trip. In the above sentence can you tell me what words modify the predicate. I think the predicate is invite but I'm not sure. if so would on our fishing trip be the predicate modifiers. And also would Jim be the subject of the sentence?
*September 24, 2008*

**english**

My grandmother happily presented the family heirloom at the wedding. In this sentence i believe heirloom is the direct object, presented is the verb but i need to know what the subject modifier is and is happily an adverb that describes presented?
*September 11, 2008*

**english**

The German Oktoberfest actually begins in September. could you tell me what the predicate modifiers are and what the number of the predicate is. I am thinking that begins is the predicate.
*September 11, 2008*

**english**

The city of munich plans many interesting festivities. Would you capitalize city and munich in this sentence?
*September 11, 2008*

**english**

The city of Munich plans many interesting festivities. In the above sentence i need to identify the nouns in the objectice case. I also need to know what part of the sentence is the word festivities. I know the subject is Munich and the form is simple.
*September 11, 2008*

**english**

In the following sentence i need to know what are the nouns in the objective case and what part of the sentence is the word festivities? I know that Munich is the subject and the form is simple but if someone could help with the other two questions that would be great!
*September 11, 2008*

**geography**

where is the safe place to live in a island and why
*July 7, 2008*

**chemistry**

covert 19.4g NH3 to moles
*April 21, 2008*

**science**

covert 12.3 g of sulfur trioxide (SO3)to moles
*April 21, 2008*

**chemistry**

wow you sure arent familiar with chemistry reaction is what you need to know......And BCA=Before Change After
*April 21, 2008*

**chemistry**

An Excess of hydrogen sulfide reacts with 42 moles of oxygen. How many moles of each product is formed using the BCA Table?
*April 21, 2008*

**chemistry**

thanks
*February 4, 2008*

**chemistry**

please help me. write the following in names:- CaHCO3 H2SO4 CaCl2
*February 4, 2008*

**english**

I have to write a research paper.My paper topic is Explain how the treatment of women in Dicken's novel Hard Times reflects the Victorian age. I SHOULD HAVE A CLEAR THESIS IN THE INTRODUCTORY PARAGRAPH, A CLEAR LINE OF DEVELOPMent and arguments.Title has to be more ...
*May 19, 2007*

**clause patterns**

can someone correct these sentences and help me understand this? 1.I remember the reasonableness of my father's arguments. SPOA or is this not adverbial? 2.We are in a bit of a mess. what is in a bit of a mess? 3.Do you call yourself a porter? is a porter object complement...
*May 3, 2007*

**predication?**

what is difference between predicate predicator and predication? Clean up the most threatened areas. In grammar, the predicate is the main verb and all the words and phrases and clauses that go with it. http://www.answers.com/predicate Scroll down a bit and read the noun ...
*May 1, 2007*

**science**

75 mph
*February 19, 2007*

**College admission letter**

I got a letter from university,it tells me that they offer me the admission on summer 2007, does it mean I will continue in fall 2007? I should think so, but to be sure, you need to call the admissions office. Just tell them who you are and that you're double-checking on ...
*January 20, 2007*

**Physics....Orbiting Satellite**

A orbiting satellite stays over a certain spot on the equator of (rotating) Venus. What is the altitude of the orbit (called a "synchronous orbit")? I found the radius and mass of Venus on the google, but I don't know what I should plug in the "T" if I ...
*January 15, 2007*

**Physics Question......many thanks**

A projectile is shot directly away from Earth's surface. Neglect the rotation of Earth. (a) As a multiple of Earth's radius RE, what is the radial distance a projectile reaches if its initial speed is one-fifth of the escape speed from Earth? ____ times RE (b) As a ...
*January 15, 2007*

**Gravitation help..........thanks**

A projectile is shot directly away from Earth's surface. Neglect the rotation of Earth. (a) As a multiple of Earth's radius RE, what is the radial distance a projectile reaches if its initial speed is one-fifth of the escape speed from Earth? ____ times RE (b) As a ...
*January 14, 2007*

**Physics help!!!!!!**

A 5.0 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.2 10-12 N. What is the gravitational potential energy of the two-particle system? a) A 5.0 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.2 10...
*January 14, 2007*

**the big idea of energy**

the big idea of energy is a term of saying explain the experiment or how the iron and sulfur make iron sulfide.the teachers are telling you to explain the experiment!!!!!!
*December 5, 2006*

**geo**

two capes located at africas southern tip Cape Agulhas and the Cape of Storms, which was renamed the Cape of Good Hope. Good luck
*October 16, 2006*

**geo**

which africian countries does the tropic of cancer pass through http://www.google.com/search?q=tropic+cancer+africa&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official =)
*October 16, 2006*

**geo**

is saudi arabia in asia or africa You need to get some good maps and/or learn how to conduct effective searches (such as via http://www.google.com) -- http://www.yourchildlearns.com/geography.htm http://www.lib.utexas.edu/maps/index.html =)
*October 16, 2006*