Tuesday

September 23, 2014

September 23, 2014

Total # Posts: 70,956

**Physics**

Thank you very much!
*August 4, 2014*

**Physics**

Why can you exert a greater force on the pedals of a bike if you pull up on the handlebars? Does it have anything to do with one of Newton's 3 laws? I'm not sure how to approach this question.
*August 4, 2014*

**physics**

A projectile is fired with an initial speed of 65.2 m/s at an angle of 34.5 degree above the horizontal on a long flat firing range. Determine (a) The maximum height reached by the projectile, (b) The total time in the air, (c) The total horizontal distance covered (that is, ...
*August 4, 2014*

**Math 221**

Do you mean (x^4 y^5) / (x^3 y^6) ?????? If so, remember when you divide you subtract exponents. =x^(4-3) y^ (5-6) =x^1 y^-1 which is = x/y
*August 4, 2014*

**computer history**

History,business study,tourism,zulu,maths literacy,english and life orientation. Am doing those subject and am in grade 11 I don't knw what career must I take anybody can help me my digit please 0724306682
*August 4, 2014*

**physics**

Lan."a"f609=714
*August 4, 2014*

**k**

What is the mass percent of sodium in NaCl?
*August 4, 2014*

**Physics-help please!**

A wave on a rope is 6.1m . a.) What is the wavelength of this wave? b.) If the frequency of the wave is 6.2Hz, what is the wave velocity?
*August 4, 2014*

**math**

Investor A deposits 1,000 into an account that earns an interest rate of 6% per annum compounded semi-annually. On the same date, Investor B deposits 800 into an account that earns an interest rate of 8% per annum compounded monthly. After how many years does Investor B’s...
*August 4, 2014*

**Physics**

The various energy changes you need to cover are: gravitational potential energy to kinetic energy kinetic energy to elastic potential energy and to heat elastic potential energy to kinetic energy and to heat kinetic energy to gravitational potential energy You could also ...
*August 4, 2014*

**physics**

Romeo is chucking pebbles gently up to juliet’s window, and he wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the edge of a rose garden 4.5 m below her window and 5.0 m from the base of the wall (Fig. 3-34). How fast ...
*August 3, 2014*

**math**

Find the standard form of the equation of the line that passes through (-3,2) and (-4,-7)
*August 3, 2014*

**math plz ugh**

Find an equation of the line with slope -3/4 and y-intercept (0,-5).write the answer in slope intercept form.
*August 3, 2014*

**math**

How would you find an equation of horizontal line that passes through the point (-4,-8)?
*August 3, 2014*

**math help plz!**

Write the following equation in slope-intercept form. Then identify the slope and y-intercept. -3x+7y=-9
*August 3, 2014*

**Physics**

A projectile is launched at an angle of 30 to the horizontal with a speed of 30 m/s. How does the horizontal component of its velocity 1.0 s after launch compare with its horizontal component of velocity 2.0 s after launch?
*August 3, 2014*

**Physics **

A projectile is launched at an angle of 30 to the horizontal with a speed of 30 m/s. How does the horizontal component of its velocity 1.0 s after launch compare with its horizontal component of velocity 2.0 s after launch?
*August 3, 2014*

**Calc BC**

When a chain hangs under its own weight, its shape is a catenary (from the Latin word for chain). The equation of a catenary with a vertex on the y-axis is . Find the length of the chain from . Then use the same technique from Problem #8 to find the length of the parabola with...
*August 3, 2014*

**physics**

Tension? Pulling one way, mg= 9.8*.06 and because it is not moving, that is the tension
*August 3, 2014*

**Grammar**

I am proud to be Hubert's child. Or I am proud to be Hubert's children.
*August 3, 2014*

**math**

Jane invests 500 at t=0 at a nominal annual interest rate of 6%, compounded quarterly. What additional amount will she need to invest at t=2 in order to have a total of 1,000 at t=5?
*August 2, 2014*

**Physics**

A projectile is launched at an angle of 30 to the horizontal with a speed of 30 m/s. How does the horizontal component of its velocity 1.0 s after launch compare with its horizontal component of velocity 2.0 s after launch?
*August 2, 2014*

**Physics**

A stone is thrown vertically upward with a speed of 18.0 m/s. (a)How fast is it moving when it reaches a height of 11.0 m? (b)How long is required to reach this height ? (c)Why are there two answers to (b)?
*August 2, 2014*

**Physics**

A car traveling 88 km/h is 110 m behind a truck traveling 75 km/h. how long will it take the car to reach the truck?
*July 31, 2014*

**greatbay community college**

A 5.00 kg stone is thrown upward at 7.50 m/s at an angle of 51.0 degrees above the horizontal from the upper edge of a cliff, and it hits the ground 1.50 s later with no air drag. Find the magnitude of its velocity vector just as it reaches the ground.
*July 31, 2014*

**math**

A specially made pair of dice has only one- and two-spots on the faces. One of the dice has three faces with one-spot and three faces with two-spot. The other die has two faces with one-spot and four faces with a two-spot. One of the dice is selected at random and then rolled ...
*July 31, 2014*

**life science**

why are fossils kept on a glass box in the museum
*July 31, 2014*

**math**

a bowl of fruit has 3 strawberries, 2 banannas and 1 apple. what fraction of the fruit is banannas?
*July 31, 2014*

**percentages**

Check this.
*July 31, 2014*

**percentages**

Say an advertiser makes $0.10 every time someone clicks on their ad. Only 20% of people who visit the site click on their ad. How many people need to visit the site for the advertiser to make $20?
*July 31, 2014*

**prealgebra**

A building lot in a city is shaped as a 30° -60° -90° triangle. The side opposite the 30° angle measures 41 feet. a. Find the length of the side of the lot opposite the 60° angle. b.Find the length of the hypotenuse of the triangular lot. c. Find the sine, ...
*July 31, 2014*

**science**

The greenhouse effect is caused by the burning of fossil fuels and deforestation
*July 30, 2014*

**English**

Are the english teachers on vacation or something? I posted my essay several times and did not see any reply.. Your help is essential!
*July 30, 2014*

**physics**

A car travels 2.74 km in the x-direction, then turns left 61.2◦to the original direction and travels an additional distance of 3.19 km. Calculate the x component of the car’s net displacement.
*July 30, 2014*

**Research Methods**

Thank you
*July 30, 2014*

**Math**

Frances can type 100 pages in h hours. At this rate, how many pages can she type in m minutes? A. mh/60 B. 60m/h C. 100m/60m D. 60h/100m E. 100h/60m
*July 30, 2014*

**Math**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove answer
*July 30, 2014*

**Math**

The endpoints of a diagonal of a square are (-2,2) and (1,5). What is the area of the square?
*July 30, 2014*

**Algebra**

For nonzero numbers x,y, and z, 3x=4y and 12y=5z. What is z/x?
*July 29, 2014*

**math**

1. Read the following statements: I. All trapezoids consist of two parallel sides. II. The base angles of all trapezoids are equal in measure. III. The lengths of the tall trapezoids legs are equal in measure. Which of the above statements are true? II only I only I, II, and ...
*July 29, 2014*

**Math**

At a speed of 48 miles per hour, how mnay minutes will it take to drive 40 miles? Is it 32 minutes?
*July 29, 2014*

**Math**

Two trains are travelling on parallel tracks both going from station A to station B.Train 1 leaves at 8 am, at 65 miles per hour. Train 2 leaves at 10 am, at 90 miles per hour. At what time will train 2 catch up to train 1?
*July 29, 2014*

**Math**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove ...
*July 29, 2014*

**PUBLIC SPEAKING**

One of the primary jobs of an informative speech is to: A. appeal to the emotions of the audience. B. ask them to do something with the information. C. communicate information accurately and clearly. D. entertain the audience.
*July 29, 2014*

**Writing**

Please give me a score of 1-6 (one being poor and six being excellent). Also, please give me some feedback! Thank you in advance! Essay prompt: What motivates people to change? Essay: Many people know that eating junk food is unhealthy. Yet, they keep eating it because it ...
*July 29, 2014*

**geometry**

A bachelor spends one half of his salary on entertainment,one fifth on food,one tenth on clothes and one fifth on rent.What fraction of his salary is left?
*July 29, 2014*

**bussiness math lit and tourism**

What university and job can I get
*July 29, 2014*

**Math**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove ...
*July 29, 2014*

**SAT WRITING**

Please give me a score of 1-6 (one being poor and six being excellent). Also, please give me some feedback! Thank you in advance! Essay prompt: What motivates people to change? Essay: Many people know that eating junk food is unhealthy. Yet, they keep eating it because it ...
*July 29, 2014*

**Criminal justice **

what subject matter does the us supreme court not have the power to decide?
*July 28, 2014*

**Math (Discrete Math)**

Let R be the statement : for all sets A, B and C, if A⊆B∪C and B ⊆C∪A then AΔB = C. Q: Is R true for all sets A, B and C? Prove answer Let S be the statement: for all sets A, B, and C, if AΔB = AΔC then B⊆C. Q: Is S true? prove ...
*July 28, 2014*

**SAT Writing**

Please give me a score of 1-6 (one being poor and six being excellent). Also, please give me some feedback! Thank you in advance! Essay prompt: What motivates people to change? Essay: Many people know that eating junk food is unhealthy. Yet, they keep eating it because it ...
*July 28, 2014*

**Calculus**

Find the antiderivative, F(x), with F′(x) = f(x) and F(0) = 1. f(x) = −7 x
*July 28, 2014*

**Chemistry**

The decomposition of NO2 at room temperature exhibits the following variation in concentration with time: The concentration of NO2 is expressed in mol/liter, while time is expressed in seconds. [NO2] ln[NO2] 1/[NO2] Time (s) 0.0831 -2.4877 12.03 0 0.0666 -2.7091 15.02 4.2 0....
*July 28, 2014*

**physical**

what is cell
*July 28, 2014*

**physical science **

what is observed during an experiment of oxalic acid and sodium hydroxide
*July 28, 2014*

**counseling**

A low, non-significant correlation between an observation-based assessment of symptoms of autism and a teacher-report of ADHD symptoms provides ____________ of the validity of the autism measure
*July 28, 2014*

**Algebra**

3(x-1) -2(x^2+3x+4)-5(x+9)=
*July 27, 2014*

**finance**

Program A has a profit of $5,000 and an investment of $100,000, while program B has a profit of $10,000 and an investment of $220,000. Which program has the better ROI?
*July 27, 2014*

**SAT**

Suits at a local clothing store are discounted 20%. Despite the discount, the store owner enjoys a net profit (discount price minus cost) equal to 60% of the cost of the suits. If the suits cost the clothing store owner $200 each, what was the prediscount price of each suit? ...
*July 27, 2014*

**Science**

What do these symbols mean: 8=====> and ({!}) and ({8=!})?
*July 27, 2014*

**Finanace**

If a firm just paid a dividend equal to $4.00 a share, then for the WACC, in order to find the cost of equity, $4 should be
*July 27, 2014*

**Math**

Sita needs a perfect score of 100 for math test in this year so as to improve on her average score from 84 to 86. How many maths tests were there altogether in this year?
*July 27, 2014*

**Maths**

The average mass of Ken, David and Kelvin is 42 kg. David is 6 kg heavier than the average mass of Ken and Kelvin. Ken is 6kg heavier than Kelvin. Find David's mass.
*July 27, 2014*

**math**

The average mass of a group of children is 36kg. If 3/7 of the no. of children are girls and their average mass is 32 kg, find the average mass of the boys.
*July 27, 2014*

**finance**

St. Luke’s Convalescent Center has $200,000 in surplus funds that it wishes to invest in marketable securities. If transaction costs to buy and sell the securities are $2,200 and the securities will be held for three months, what required annual yield must be earned ...
*July 27, 2014*

**finance**

An important source of temporary cash is trade credit, which does not actually bring in cash, but instead slows its outflow. Vendors often provide discounts for early payment. What is the formula to determine the effective interest rate if the discount is not utilized?
*July 27, 2014*

**finance**

Your firm is considering the following three alternative bank loans for $1,000,000: a) 10 percent loan paid at year end with no compensating balance b) 9 percent loan paid at year end with a 20 percent compensating balance c) 6 percent loan that is discounted with a 20 percent...
*July 27, 2014*

**chemistry**

A sol n contains 37g cuso4 and 111g water . Calculate the concentration by mass /c of sol n.
*July 27, 2014*

**health care finance**

An important source of temporary cash is trade credit, which does not actually bring in cash, but instead slows its outflow. Vendors often provide discounts for early payment. What is the formula to determine the effective interest rate if the discount is not utilized?
*July 27, 2014*

**health care finance**

Your firm is considering the following three alternative bank loans for $1,000,000: a) 10 percent loan paid at year end with no compensating balance b) 9 percent loan paid at year end with a 20 percent compensating balance c) 6 percent loan that is discounted with a 20 percent...
*July 27, 2014*

**health care finance**

St. Luke’s Convalescent Center has $200,000 in surplus funds that it wishes to invest in marketable securities. If transaction costs to buy and sell the securities are $2,200 and the securities will be held for three months, what required annual yield must be earned ...
*July 27, 2014*

**algebra**

A company charges 200 for each leather bag on order of 150 or less. The cost of each bag is reduced by 1 for each order in excess of 150 pieces. How many bags on order would result in result in maximum revenue? What is the maximum revenue?
*July 27, 2014*

**Philosophy **

According to Aristotle, we should begin ethical inquiry by specifying
*July 27, 2014*

**math**

A2-b2 farmula
*July 27, 2014*

**Chem: x-ray**

Experiment to obtain the X-ray diffraction peaks of an unknown metal. Radiation is K_alpha from Cu. Through these diffraction peaks you wanted to determine: (a) whether the cell is SC, BCC, or FCC (b) the (hkl) value of the peaks (c) the lattice parameter a of the metal sin^2(...
*July 26, 2014*

** math**

the table below shows some values for the function f. if f is a linear function, what is the value of a+b? table: X | f(x) 0 | a 1 | 12 2 | b
*July 26, 2014*

**chemistry**

show you tried and I'll give you an hint ok?
*July 26, 2014*

**medical billing and coding**

a new technology that will change the role of the transcriptionist is
*July 26, 2014*

**chemistry**

*so, do
*July 26, 2014*

**chemistry**

First of all thanks for your help. I meant that reading around the web, NO2 at room tempearature is said to be a second order rection. If it was such, the graph of 1/C vs time should be a straight line, whose k is the rate. I did that, and those values are near but not ...
*July 26, 2014*

**chemistry**

you mean without ln, just dC/dt over C ? not a straight line. I've searched around and I am under the impressione that even if values don't align perfectly people still say it's second order reaction, is it? ratio of (1/t)/t are as follow: 0.7119 0.7081 0.8257 0....
*July 26, 2014*

**Calc**

A rancher wants to fence in an area of 1500000 square feet in a rectangular field and then divide it in half with a fence down the middle, parallel to one side. What is the shortest length of fence that the rancher can use?
*July 25, 2014*

**home economics**

The US government does not influence its economy true or false?
*July 25, 2014*

**Math 105**

To estimate the proportion p of defective light bulbs produced in a factory, a sample of 180 bulbs were tested. In this sample 27 were defective. We will compute a 95 percent confidence interval for p. Compute the margin of error e in esimating p at 95 percent level of ...
*July 25, 2014*

**math**

An equilateral triangle and a regular hexagon share a common side. The perimeter of the triangle is 20 cm. What is the perimeter of the hexagon?
*July 24, 2014*

**physics**

A bus and a car have an inelastic head-on collision. The bus has a mass of 1.5 × 103 kilograms and an initial velocity of +20 meters/second. The car has a mass of 9.5 × 102 kilograms and an initial velocity of -26 meters/second. What is their total momentum after ...
*July 24, 2014*

**geometry**

A number is selected at random from the set {2, 3, 4, … 10}. Which event, by definition, covers the entire sample space of this experiment?
*July 24, 2014*

**M**

In printing an article of 21,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,200 words. Using the small type, a page contains 1,500worda. The article is alloted 16 full pages in a magazine. How many pages must be in the ...
*July 23, 2014*

**quant**

The president of Pegasus Corporation is trying to decide which of three candidates (denoted as candidates A, B, and C) to hire as the firm’s new vice president of Marketing. The primary criteria the president is considering are each candidate’s leadership ability, ...
*July 23, 2014*

**math**

out of every 220 packages of coffee 30 are in twelve oz bags, 60 are in 16 oz. bags and 110 are in 5 lb bags. 1100 packages were labeled in 8 minutes. how many packages are there of each?
*July 23, 2014*

**geometry**

She is defintley in Aops geometry. I have the same problem due this week.
*July 23, 2014*

**geometry**

Are you in Aops geometry?
*July 23, 2014*

**Poetry**

One difference between the English sonnet and the Italian sonnet is its
*July 22, 2014*

**math**

216 cubic feet
*July 22, 2014*

**mathematics**

Of the bundles delivered daily to the store, 1/3 consists of the morning edition of The Daily Sun. Another 2 bundles are made up of the afternoon edition of the same paper. Of the remaining bundles, 1/2 is regional, one is a local newspaper, and one is from another state. How ...
*July 22, 2014*

**math**

7680 words
*July 22, 2014*

**math**

A page in an average newspaper has 8 columns of print. Each column consists of 160 lines and each line averages 6 words. What’s the average number of words on a full page?
*July 22, 2014*

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