Sunday

April 19, 2015

April 19, 2015

Total # Posts: 114

**physics**

A machine with an efficiency of 100% is said to be efficient. a) If a lever has a distance of 4m from the pivot to where a load of 500N is applied and a distance of 1m from the pivot to where the load is,calculate the efficiency of the lever when height moved by effort i 3m ...
*April 14, 2015*

**physics**

A 10kilow walts electric motor is used to raise a 400kg load of bricks to a height of 60meters.The efficiency of the motor 80%.what is the input energy?
*April 14, 2015*

**Math Help**

Well the way the problem was on my paper, it doesn't have parenthesis so I wasn't sure if I should add them, sorry. (3)/(x^2)+(x-2)=(-1)/(x+2)+(1)/(x-1)
*March 19, 2015*

**Math Help**

Directions: Decide whether the statements are true or false by using partial fraction decomposition. If the statement is false, show the correct way to decompose the partial fraction. 3/x^2+x-2=-1/x+2+1/x-1
*March 19, 2015*

**chemistry**

2. A solution of I2 was standardized with ascorbic acid. Using a 0.1000-g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. a) What is the molarity of the iodine solution?
*January 27, 2015*

**English**

I'm creating an intro for an essay with an assigned topic. My teacher marked what I wrote and said 'Too similar to your assigned thesis' and they also wrote 'your thesis must not be altered from what was assigned. What do I do?
*December 4, 2014*

**science**

Wood fragments from the floor of a palace in Syria - Syro-Hittite period. Date: 675 ± 50 years BCE?
*December 1, 2014*

**trig**

from a top of a hill
*October 12, 2014*

**coolkid1234567890**

Purple Blue elementary school is 187 miles from washington dc. According to google maps it should take about 3 hours and 5miutes to get there. What is our speed. Please tell me how you did it and the answer. Thank you
*October 9, 2014*

**Math**

A basket contains the following pieces of fruit: 3 apples 2 oranges, 2 bannans, 2 pears, and 5 peaches. Jonas picks a fruit at random and does not replace it. Then beth picks a fruit at random. What is the probability that jonas gets a peach and beth gets an apple?
*April 21, 2014*

**Language Arts**

Thx
*April 17, 2014*

**Language Arts**

Which is the best way to clarify the sentence "The few arguments against pet ownership scarely need to be mentioned"? A. Most people favor pet ownership, but the author believes that the arguments against it are strong. B. Few people can provide reasons not to own a ...
*April 17, 2014*

**Physics**

The driver of a Cadillac is traveling at a constant 60mi/hr. A police car is 20m behind the perpetrator when it too reaches 60 mi/hr and at that moment the officer floors the gas pedal. If the police car roars up to the rear of the Cadillac 2.0s later what was its acceleration...
*November 5, 2013*

**Physics Verification**

A poorly tuned Prius can accelerate from rest to a speed of 28 m/s in 20s. a) what is the average acceleration of the car? my answer is 1.4 b) Find its displacement in this time. my answer = 280 Can anyone verify this please?
*October 26, 2013*

**Geometry, Help**

Ty STEVE
*August 19, 2013*

**Math Statistics**

Suppose a large-scale randomized experiment were conducted to compare two weight loss plans. At the end of the experiment, the weight loss for each subject (in pounds) was recorded. The p-value turned out to be .004, and a 99% confidence interval for the difference in means ...
*August 2, 2013*

**statistics**

Suppose a large-scale randomized experiment were conducted to compare two weight loss plans. At the end of the experiment, the weight loss for each subject (in pounds) was recorded. The p-value turned out to be .004, and a 99% confidence interval for the difference in means ...
*August 1, 2013*

**statistics**

Suppose a large-scale randomized experiment were conducted to compare two weight loss plans. At the end of the experiment, the weight loss for each subject (in pounds) was recorded. The p-value turned out to be .004, and a 99% confidence interval for the difference in means ...
*July 31, 2013*

**Math**

Find the solution set of the equation {x^2+y^2=34 {x+y=2
*July 16, 2013*

**Math**

Find the solution set of the equation {x^2+y^2=34 {x+y=2
*July 16, 2013*

**Math**

Find the solution set of the equation {x^2+y^2=34 {x+y=2
*July 16, 2013*

**Math**

Find the solution set of the equation {x^2+y^2=34 {x+y=2
*July 16, 2013*

**Maths(help me plz..!**

The sides of a triangle are of lenths x*-y*, x*+y* and 2xy units respectively. Prove that the triangle is a right angled triangle
*July 11, 2013*

**Math(angle of depression) i need help please..**

An observer on top of a cliff 25m above sea level views a boat on the sea at an angle of depression of 35. How far is the boat from the foot of the cliff?
*July 11, 2013*

**Math**

35/4=x/2, then cross multiplication, 35 by2 and x by 4 then it will be 4x divide by 70 which is = to 17.5
*July 11, 2013*

**Maths**

When the angle of elevation of the sin55 a tower cast a shadow 20m long. Find the height of the tower
*July 10, 2013*

**French check my answer**

I posted this again because i really need help fast!! I am writing a postcard to my friend saying i went on a trip to the country guadeloupe, this is my letter in english and can you please check if i translated it properly into french, thanks :) Hello Louis. I am visiting the...
*May 16, 2013*

**French**

I am writing a postcard to my friend saying i went on a trip to the country guadeloupe, this is my letter in english and can you please check if i translated it properly into french, thanks :) Hello Louis. I am visiting the country Guadeloupe and I love it. I saw the amazing ...
*May 16, 2013*

**Science 1 question SPACE**

well i guess there is no such path on images, but thanks Ms.Sue for trying
*May 14, 2013*

**Science 1 question SPACE**

I re-posted this question because noone helped and I need help fast! I am doing a project on the planet uranus and I need a map showiong the path to my planet that i have chosen. The picture of the path must include asteroids, comets or other interesting objects. I am having ...
*May 14, 2013*

**Science space**

I am doing a project on the planet uranus and I need a map showiong the path to my planet that i have chosen. The picture of the path must include asteroids, comets or other interesting objects. I am having so much trouble looking for such a picture. I have tried looking on ...
*May 14, 2013*

**Math**

How do I figure out the problem below? (4-1)x ____ = 3x7 ??
*March 25, 2013*

**physics**

vector R= (t^3-9t^2 + 24t + 10)jhat
*March 21, 2013*

**Physics**

A 1.0cm wide diffraction grating has 1000slits. It is illuminated by light of wavelength 550nm. What are the angles of the first two diffraction orders?
*March 15, 2013*

**it**

Assume you have a computer that contains 1GB of memory. It contains four memory slots. Each slot can contain 128 MB, 256 MB, 512MB, 1 GB, or 2GB memory modules. two of the slots contains a 512MB memory module. What memory chip would you buy to increse the memory on the ...
*January 30, 2013*

**History**

I need answer concrete
*January 13, 2013*

**History**

1.What was the new deal's legacy? 2. new measures were taken during the new deal and what agencies were formed?
*January 13, 2013*

**ENGLISH**

Can someone tell me what is Elite tourism?
*November 20, 2012*

**math square root**

Indicate which of the following are true and which are false. for those that are false, change the UPPER-CASE expression to make the statement true. *Every integer is a WHOLE number * the quotient of two non zero numbers is always a RATIONAL number * the counting numbers are ...
*November 20, 2012*

**square roots**

Define the square root of a given number with the use of an example.
*November 20, 2012*

**math **

a man bought a number of items at a bakery totalling $10.20 ,if the sales tax was $0.51 what is the tax rate?
*November 14, 2012*

**maths**

if the number of daily customers served by a restaurant increased from 160 to 208,what was the percent increase?
*November 14, 2012*

**maths **

After one year ,a writer had to pay $589 in interest on a $6,200 loan.what is the interest rate?
*November 14, 2012*

**Science**

Is this correct? In pea plants, the allele for green pods is G. The allele for yellow pods is g. In the offspring 27 (75 percent) had green pods and 9 (25 percent) had yellow pods. What are the parents genotypes? How do you know? The parents genotypes are GG and gg. Because ...
*November 10, 2012*

**history**

difference between iroquois clan mother and iroquois headwoman
*November 8, 2012*

**Maths**

A car showroom had 10y cars, 20y motorcycles and 18 vans. In a particular month, 4y cars , 3y motorcycles and 15 vans were sold. a.) Find the total number of wheels on the remaining vehicles in terms of x. b.) If y=21, how many wheels were there? An indoor stadium has 25 460 ...
*November 7, 2012*

**physics**

A car travels at 107 km/h on a level road in the positive direction of an x axis. Each tire has a diameter of 74.0 cm. Relative to a woman riding in the car and in unit-vector notation, what are the velocity at the (a) center, (b) top, and (c) bottom of the tire and the ...
*October 31, 2012*

**Physics**

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
*October 23, 2012*

**Geography**

Is Lima, the capital of Peru, east or west of the 80 degrees west line of longitude? Is this correct? East?
*September 22, 2012*

**Geography**

Is this correct? What are the three continents with the largest land areas in the world? Asia Africa and north america
*September 22, 2012*

**Math**

Jimmy measured four pieces of wood . Their measures are 4.2ft , 9/2 ft, 4.2ft, and 4 2/9 . What is the length of the shortest piece ?
*September 11, 2012*

**Stats**

Can someone please explain how to find the frequency from: Lower limit:230,240,250 upper limit:239,249,259 Mid Value:234.5,244.5,254.5
*September 3, 2012*

**english**

which one of the following sentences contains a collective noun? A. the quality of mercy is not strained. B. wo among you is a butcher, a baker, or a candlestick maker? C. Listen, my children, and you shall hear. D. the legislature met in secret session. is it (B)?
*July 17, 2012*

**Statistics**

A professor receives, on average, 8 emails from students on the day before an online quiz. If the distribution of the calls is Poisson, what is the chance that he received at least 6 and at most 10 emails on such a day?
*June 17, 2012*

**Ap Phyics**

Figure shows an overhead view of a 0.024 kg lemon half and two of the three horizontal forces that act on it as it is on a frictionless table. Force F1 has a magnitude of 6 N and is at ¥è1 = 25¢ª. Force F2 has a magnitude of 10 N and is at ¥è2...
*April 21, 2012*

**reading**

I know that it is polk-a-dotted but in what colors?
*March 17, 2012*

**reading**

In the book, "The face on the milk carton", what color is Janie's shirt?
*March 17, 2012*

**health class**

how do you convince someone to stop smoking. Also,how do you relieve stress without smoking or eating? Please help.
*March 16, 2012*

**Cooking Class**

Can you help me find a link on how to make zeppoles (ex; step 1 then step 2) Please.
*March 13, 2012*

**spanish**

Hello Can someone in here help me with my spanish homework? It's only 100 words
*March 2, 2012*

**physics**

The drawing shows a skateboarder moving at 5.34 m/s along a horizontal section of a track that is slanted upward by 47.7 ° above the horizontal at its end, which is 0.795 m above the ground. When she leaves the track, she follows the characteristic path of projectile ...
*February 26, 2012*

**precalc/trig**

Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places. 20 log(2x+2)=45
*December 5, 2011*

**trig**

Find the exact value of the trigonometric function given that sin u = − 8/17 and cos v = − 3/5. (Both u and v are in Quadrant III.) cot(v − u)
*November 20, 2011*

**CHEMISTRY**

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of acid ...
*November 10, 2011*

**Chemistry**

how do you get 0.014 ? i seem to be getting another answer
*November 9, 2011*

**CHEMISTRY**

is not 0.117
*November 9, 2011*

**CHEMISTRY**

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of acid ...
*November 9, 2011*

**Algebra Question**

3+((x-3)/4)*3=Total Miles Fill in X with number of days in month
*October 11, 2011*

**Algebra Question**

3+((x-3)/4)*3=Total Miles Fill in X with number of days in month
*October 11, 2011*

**Math**

Okay heres the pic. There is a plane with points B,D, and E.those [oints are collinear in the plane. And also outside of the plane is points A, and C. and those points are collinear outside of the plane.thought Line AC intersect at point B of the line BDE.FOr line AC the C is...
*September 12, 2011*

**Geo Hons**

Okay heres the pic. There is a plane with points B,D, and E.those [oints are collinear in the plane. And also outside of the plane is points A, and C. and those points are collinear outside of the plane.thought Line AC intersect at point B of the line BDE.FOr line AC the C is ...
*September 12, 2011*

**MATHS**

Could you expand more on the answer anoymomous?
*July 9, 2011*

**grammar **

I am trying to say that the person felt the SAME way as they did before,since congruent means the same.
*April 7, 2011*

**grammar **

Can you say that someone felt as congruent as they felt before?
*April 7, 2011*

**history**

benjamin frankli acristic poem
*March 17, 2011*

**music**

is the trumpet in the brass section?
*March 7, 2011*

**math**

What is the range,median ,and mode?
*March 5, 2011*

**social studies**

Why is the radio important? How is it used in the present time? How does the radio make people's lives easier?
*March 5, 2011*

**history**

why is betsy ross an important person??
*March 2, 2011*

**english**

Intelligence of the turkey, write the following in possessive form
*January 19, 2011*

**american history**

why were the french at first reluctant to sign an alliance with the colonies
*January 6, 2011*

**Math**

I have two unknown numbers x and y, and the sum of x and y(x+y) is 78 and the product is (x*y) is 896
*December 15, 2010*

**math**

there is 28 students 2 Teachers and 12 extra guests, 28+2+12=42 People are there They need 3 pizza slices each. 42*3=126 pizza slices are needed. A pizza cane only be cut in 10 slices so 126/10=12.6 So u need 13 pizzas
*December 15, 2010*

**Physics**

I have no idea how to do this.
*November 21, 2010*

**Physics**

A 50.0g Bullet traveling horizontally at 200.0 m/s embeds itself in a much more massive wooden block initially at rest on a horizontal surface (μ=0.10) The block then slides 1.2m toward an ideal spring and collides with it. The block compresses the spring (k=600.0 N/m) a ...
*November 21, 2010*

**math**

If 5/17 of a region is shaded, what fraction is not shaded?
*September 13, 2010*

**Physics**

It has been suggested that rotating cylinders about 10 mi long and 5.6 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration?
*April 6, 2010*

**math**

sean had the following test grades: 50%, 65%, 50%, 45%, 100%. what is the range ?
*April 6, 2010*

**math**

Stan bought several clothing items at macys. He bought a jacket for $30.00, a hat for $10.00, and two shirts for $5.00 each. He had a coupon that took 30% off the total bill. He paid with a $50.00 bill and received three of the same types of bills in change. What were those ...
*April 6, 2010*

**math**

thomas wants to build a seven layer brick wall. the bottom layer has 20 bricks and each layer of the wall that goes up has two less bricks than the layer below it. if each brick costs .50 cents to cement how money will Thomas spend on the wall ?
*April 6, 2010*

**math**

it takes a 40 lb turkey two hours to cook. Tom baked his own turkey that was 1/5 the size of a 40 lb turkey. How long will it take for Toms turkey to bake ?
*April 6, 2010*

**math**

there are 40 marbles in a jar. Chris had 2/5 of the marbles, Sal had 1/8, Tim had 1/10, and Bob, John and Don split whatever was left over evenly. How many marbles did Bob, John and Don split ?
*April 6, 2010*

**math**

there are 500 seats in the auditorium. A concert was playing there and 1/5 of hte seats were not filled. All the other seats that were filled cost $5.00 a piece to sit in. HOw much money was made in concert tickets ?
*April 6, 2010*

**college chemistry**

An aspirin tablet weighing 0.502 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was ...
*January 24, 2010*

**social studies**

i need to find the history of lambs. can you help???
*December 3, 2009*

**math**

i don't have the answer. i asked the question.
*December 3, 2009*

**3rd grade**

what multiplication fact can be found using the arrays for two times nine and five times nine?
*December 3, 2009*

**Physics**

To vanessa, why would it be tan, when the 12.5 is the hypotenuse because the way you formulated is saying that 12.5 is x.
*September 13, 2009*

**Catering**

You're likely to encounter formal service in all of the following settings except which one?
*August 28, 2009*