Friday

February 27, 2015

February 27, 2015

Total # Posts: 150

**Physics**

A cannon ball is fired horizontally with an initial speed of 75 m/s from the top of a 50-m tall building. When the ball hits the ground, its velocity vector makes an angle θ with the horizontal. What is θ
*February 11, 2015*

**Chemistry**

Calculate the kinetic energy change in the water that occurs when 10,000lb/hr flow in a pipe that is reduced from a diameter of 2 in. to a diameter to 1 in. Any ideas on solving this? The answer is 2.7 lbf*ft.
*November 7, 2014*

**Need help badly, Science**

Suppose the incident sunlight at ground level has a power density of 0.87 kW m−2 at noon. What is the maximum rate of loss of water from a lake of area 1.0 ha? (1 ha = 104 m2.) Assume that all the radiant energy is absorbed. any ideas on how do i get through with this?
*September 28, 2014*

**Math**

Bobby has some marbles.one-third of them are blue.one-half of them are red and the rest are green.if he has 7 green marbles, how many marbles does have altogether?
*September 22, 2014*

**material balance**

Wet air containing 4.0 mole% water vapor is passed through a column of calcium chloride pellets. The pellets adsorb 97.0% of the water and none of the other constituents of the air. The column packing was initially dry and had a mass of 3.40kg. Following 5.0 hours of operation...
*July 12, 2014*

**Plz help me.**

1.) D 2.) D 3.) B 4.) A
*March 13, 2014*

**Calculus II**

Solve the initial value problem using Taylor Series and the following conditions: y'(t) = y(t) + 2t y(0) = A
*February 2, 2014*

**Math**

This is how I would intuitively do this one: 445-15=430 430/21.50=20 There were twenty people at the party. The 15 is there even if nobody came to the party, so you have to include that.
*December 14, 2013*

**media**

I realize that this may sound like a unique question, but please humor me anyway. Is there a place where people can efficiently watch relatively recent movies in their entirety for free? Or is that illegal?
*December 14, 2013*

**Math**

If you are explicitly told to use one method, then of course do that. Otherwise, just indicate what method you are intending to use, and then do it. You should know how to do all of the methods anyway. However, some of them are not as convenient as others. If you do not have ...
*December 14, 2013*

**Math**

Have you already found these answers or are these what the answers are supposed to be? If you provide a little more context, then I am sure someone will be happy to help you.
*December 14, 2013*

**Economics**

And your question is?
*December 14, 2013*

**Density Problem**

The moon has radius 1740 km and mass 7.35x10^22? kg.What is its average density?
*November 17, 2013*

**Math**

well.. i got that too.. but i dont know how to find the longer diagonal with this given sides
*October 28, 2013*

**Math**

the distance between the center of symmetry of a parallelogram and its longer side is equal to 12 cm. The area of the parallelogram is 720 cm^2, and its perimeter is 140 cm. Determine the length of the longer diagonal of the parallelogram
*October 28, 2013*

**Math**

Cant it be explaind another way I really dont understend
*October 24, 2013*

**Physics**

A 0.02kg bullet collides with a 5.75kg pendulum. After the collision, the pair swings up to a maximum height of 0.386m. Determine the velocity of the bullet just before impact.
*October 5, 2013*

**Physics**

A 0.02kg bullet collides with a 5.75kg pendulum. After the collision, the pair swings up to a maximum height of 0.386m. Determine the velocity of the bullet just before impact.
*October 5, 2013*

**ALGEBRA**

HOW DO I SOLVE THIS PLEASE 5ãx =ãx -12
*September 15, 2013*

**algebra**

How do I solve this problem ã2x -7+8=11
*September 15, 2013*

**Math, Related Rates**

Consider the hyperbola y = 1/x and think of it as a slide. A particle slides along the hyperbola so that its x-coordinate is increasing at a rate of f(x) units/sec. If its y-coordinate is decreasing at a constant rate of 1 unit/sec, what is f(x)? -I arrived at the answer f(x...
*September 10, 2013*

**math**

The Flour Power Bakery makes 200 cherry cheesecakes at a cost of $2.45 each. If a spoilage rate of 5% is anticipated, at what price should the cakes be sold to achieve a 40% markup based on cost?
*August 31, 2013*

**Physics Normal force**

When an object exerts a normal force on a surface, the force is My answer is perpendicular to the surface. Am i correct?
*August 3, 2013*

**Chemistry**

What mass of KIO3 is needed to convert the copper in 0.200g of CuSO4.H2O to Cu(IO3)2? my answer is: 0.828g Cu(IO3)2 x (2*214.003 MolarM KIO3/ 413.36 MolarM Cu(IO3) = 0.857g KIO3 could you please check if i got it right
*July 17, 2013*

**Chemistry**

What mass of AgI can be produced from a 0.512g sample that assays 20.1% ALI3?
*July 13, 2013*

**Physics**

Suppose this dude wants to be able to touch the rim of a basketball goal. The rim is 3.048 m above the ground. The dude can reach up 2.45 m with his feet on the ground. (a) If the dude can achieve a liftoff speed of 2.80 m/s, what is his maximum upward displacement?
*July 10, 2013*

**Chemistry help**

Average human blood serum contains 18 mg of K+ Calculate: a) the molar concentration for each of these species; use 1.00 g/mL for the density of serum. I have worked as of this (18 mg K+/100 mL)(1mL/1g)(1 mmol/39.10mg)(1g/1000mg). But it seems that some units are not cancelled...
*July 7, 2013*

**chemistry about buret**

In the experiment of buret calibration, what is the importance of having total buret correction? And does the density of the water at a specific temperature affect this corrections?
*July 2, 2013*

**Mathematics**

If a man and a half finishes a job and a half within a day and a half, how many men can finish 3 jobs within 3 days. Please I need help, I am not so sure with my answer of 6. I would like to verify it. THANKS
*June 25, 2013*

**Math Algebra II**

I am confuse how to solve a relation function such as f(x) = 1x -12. show me example on how resolve this problem
*June 18, 2013*

**Chemistry**

Sea water contains an average of 270 ppm of sulfate ion. Calculate the molar concentration of sulfate given that the average density of sea water is 1.02 g/ml. -At first i tried assuming that density is 1.00 g/ml which is a common practice in ppm problems but the answer is ...
*June 12, 2013*

**chemistry**

how many milliliter of .750M sulfuric acid are needed to neutralize completely 20 g of NaOH?
*April 22, 2013*

**MATH**

A tin is a right circular cylinder with a diameter of 6 meters and a height of 10 meters. What is the surface area of this tin, in terms of pi?
*March 1, 2013*

**MATH**

Posted by xavier on Monday, February 11, 2013 at 8:28pm. Hello... Asking for help with this one math question to understand how to do the rest of related question? thank you in advance.... shape 1 (3.5,-8.5) ,(3.5,-9) , (3,-10.5) , (2,-12)
*February 11, 2013*

**math**

please anwser
*February 11, 2013*

**math**

and for each shape plot the ordered pairs on the axis and connect them in order
*February 11, 2013*

**math**

shape 1 (3.5,-8.5) ,(3.5,-9) , (3,-10.5) , (2,-12)
*February 11, 2013*

**Analytic Geometry**

Find the equation of the parabola through (-15/4 ,2) and (0,-1) whose axis is parallel to the x-axis and the latus rectum equal to 4
*February 11, 2013*

**Analytic Geometry**

What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0
*January 31, 2013*

**Analytic Geometry**

What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0
*January 31, 2013*

**Analytic Geometry**

Find the equation of the circle, with radius 1, tangent to the line 3x+4y=5 and having its center on the line x+2y=0
*January 31, 2013*

**Analytic Geometry**

thank you very much!
*January 25, 2013*

**Analytic Geometry**

Find the equation of a circle passing through (3,7) and tangent to the lines x-3y+8=0 and y=3x. Please help me
*January 25, 2013*

**Analytic Geometry**

Find the equation of a circle passing through (3,7) and tangent to the line x-3y+8=0
*January 25, 2013*

**Chemistry**

Please help, do you have any pointers on how to use linear regression in determining the reaction order
*January 16, 2013*

**Analytic geometry**

What is the distance of the line x+6y-7=0 from the origin? Please help, is my answer -7sqrt37/37 correct? If not, please help me whats the right solution
*January 12, 2013*

**geometry**

A moving point is always equidistant from (-3,2) and the line 2x-y+2=0. What is the equation of its locus? how do you solve this?
*January 7, 2013*

**geometry**

Find the equation of a line parallel to 5x +6y = 0 at distance sqrt 61 from (-3,7) I need help please. I dont have any idea
*January 7, 2013*

**Algebra**

The first element of a geometric sequence is 1 and the common ratio is 3; determine the smallest 4 digit numeral that represents an element of this geometric sequence
*December 16, 2012*

**geometry**

find the equation of the line through (6, -3) and (-4, -7)
*December 13, 2012*

**Analytic Geometry**

Please help me to solve this problem. Find the equation of the locus of a moving point if the sum of the slopes of the line joining it to (1,3) and (4,-2) is 1.
*December 13, 2012*

**Chemistry**

The ΔHof of gaseous dimethyl ether (CH3OCH3) is –185.4 kJ/mol; the vapour pressure is 1.00 atm at –23.7oC and 0.526 atm at –37.8oC. a) Calculate ΔHovap of dimethyl ether. b) Calculate ΔHof of liquid dimethyl ether Any idead how to calculate for ...
*December 11, 2012*

**Chemistry HELP**

A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0.0oC. just this question cause i...
*December 11, 2012*

**Chemistry**

A 0.75 L bottle is cleaned, dried, and closed in a room where the air is 22°C and 47% relative humidity (that is, the water vapor in the air is 0.47 of the equilibrium vapor pressure at 22°C). The bottle is brought outside and stored at 0.0°C. My question is what ...
*December 11, 2012*

**Chemistry**

I need help with this problem A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0....
*December 9, 2012*

**Chemistry**

At a local convenience store, you purchase a cup of coffee, but, at 98.4oC, it is too hot to drink. You add 23.0 g of ice that is –2.2oC to 248 mL of the coffee. What is the final temperature of the coffee? (Assume the heat capacity and density of the coffee are the same ...
*December 9, 2012*

**Chemistry**

A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0.0oC. a) What mass of liquid ...
*December 9, 2012*

**Chemistry**

Methyl salicylate, C8H8O3, the odorous constituent of oil of wintergreen, has a vapour pressure of 1.00 torr at 54.3oC and 10.0 torr at 95.3oC. a) What is its vapour pressure at 25oC? b) What is the minimum number of liters of air that must pass over a sample of the compound ...
*December 8, 2012*

**maty**

thank you
*December 5, 2012*

**Math Help!**

Kayla buys a $20 phone card. She is charged $0.15 per minute for long distanced calls. What equation gives the value (v) left on her card after she makes (t) minutes of long distance calls.
*December 5, 2012*

**reading**

intra + wall painting = inter +able to be altered= intra+declare= inter+act as agent between two parties in conflict the ones i dont know the others i knew
*November 5, 2012*

**reading**

hello im diong meaning match for an example inter + scene = interview counter + segment of a whole = ???
*November 5, 2012*

**social studies**

GIFT OF THE NILE 1. What would be the main mineral resource in lower Egypt?
*October 14, 2012*

**Math**

Auppose f is even but g is an arbitrary function (possibly neither even nor odd). (a) Is f o g still even? Show why or why not. (b) Is g o f even? Show why or why not.
*October 3, 2012*

**math**

13.33
*July 24, 2012*

**English**

La fête nationale Française c'est plus précisément le 14 juillet .
*July 12, 2012*

**french**

Salut , Tu veux apprendre le français ? , c'est une bonne initiative. J'essaye d'apprendre l'anglais moi aussi. Je comprends la langue, mais j'ai du mal parler anglais.Google traduction est mon ami :) à bientôt ! hello, Want to learn ...
*June 17, 2012*

**Religion **

Hello I am trying to find a site that will play audio reading of the bible. Book of Roman in its entirety? Is this possible?
*May 15, 2012*

**french**

I am French, so you can put your sentence here, than i will correct it :) (I try to learn English too. i will be grateful if you correct me ). see you soon
*May 12, 2012*

**MATH 6TH**

THANK YOU MS. SUE HOW ABOUT #3 - PATTERNS DIVIDED WITH DECIMALS TENTHS, HUNDRETHS....
*April 26, 2012*

**MATH 6th**

thank you Ms. Sue what about the PATTERNS #3
*April 26, 2012*

**MATH 6th**

1. Is there a website that can show me how to divide decimals by10-1000? 2. Divide decimals by whole numbers? 3. Patterns with tenths, hundredths and thousandths? PLEASE HELPL ME - THANK YOU IN ADVANCE. JUST SOME SAMLES OF ALL THE ABOVE
*April 26, 2012*

**science 6th grade**

THANK U
*April 22, 2012*

**science 6th grade**

do you know where I can find in abc order all of the STATES AND THEIR CAPITALS MAYBE A LINK. THIS IS FOR MY HOMEWORK TOMORROW.....THANK YOU IN ADVANCE FOR YOUR HELP!
*April 22, 2012*

**maths**

64 1,2,4,8,32,16,64 - Odd number of factors
*March 27, 2012*

**maths**

38+x = 2(4+x) 38+x = 8 +2x 38-8 = 2x - x 30 = x So, His age is 30+38 = 68 His son age is 30 + 4 = 34 difference is 68-34 = 30
*March 24, 2012*

**maths**

John is 3 times as old as Susan now. In 4 years time John will be 18 years older than Susan. Find John's age and Susan;s age now.
*March 22, 2012*

**math**

Susie drew a triangle with angles that measure 47, 43. and 90 degrees. What type of triangle did she draw?
*February 22, 2012*

**chemistry**

looking at all the averages on the front board, give at least three possible reasons for the values being different. classroom values from board: 10, 15, 25, 18, 39, 45
*January 22, 2012*

**math**

What 42 out of 16 simpfly
*January 11, 2012*

**french**

1] Il ne parle pas espagnole. 2] Je n'étudie pas. 3] Jouez-vous au foot ? 4] Est-ce que Marie est ici ? 5] Travaille-il ? 6] Est-ce qu'ils sont là ? 7] ! (Tu ne peux pas utilier est-ce que ici ) ;)
*January 3, 2012*

**math**

find the product or quotient . write the strategy you used . write model,break apart, multiplication table ,inverse operations pattern ,or doubles 56 divided by 7
*September 19, 2011*

**gcse geography**

i need to do a case study on France and i have several questions i need help with.Do you know of any good websites that can help me. Some of the questions i need to answer and are struggling with are:- *Which other capital cities/major population centres are close to Paris? *...
*September 17, 2011*

**chemistry**

Which of the following would be the best technique to use in order to separate a soluble solid from a liquid?
*June 21, 2011*

**science**

a person has a hert attack and her condition is stablised but due to inflamatiom in the lung she could not breath so a machine helps her to breath and now the lung inflamation is healing .Will she be able to breath on her own once the machine is cut off?
*May 30, 2011*

**music**

In plainchant, a sentence of text almost always ends with
*April 20, 2011*

**music**

In plainchant, a sentence of text almost always ends with
*April 20, 2011*

**science**

what must be the genotypes of their children?
*March 26, 2011*

**science**

what must be the genotypes of their children?
*March 26, 2011*

**math**

Jerry has 76 quarter.How much dollars do he has? I said the answer is either $19.00 or $76.25 which one is correct Thank you
*March 17, 2011*

**math**

the exact position of the squer root of 50 on a number line
*February 15, 2011*

**math**

I round to nearest ten these problems: 72 x 4 =290 15 x 6 =90 are these correct?
*February 7, 2011*

**math**

What is the largest three digit number you can write without using a 9 in the hundreds place or ones place, or an 8 in the tens place?
*February 1, 2011*

**math **

1/3 of 18
*January 19, 2011*

**physics**

One of the Echo satellites consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. Suppose a meteor having a mass of 9.2 kg passes within 4.4 m of the surface of the satellite. What is the gravitational force on the meteor from the satellite at ...
*November 26, 2010*

**physics**

You weigh 516 N at sidewalk level outside the World Trade Center in New York City. Suppose that you ride from this level to the top of one of its 410 m towers. Ignoring Earth's rotation, how much less would you weigh there (because you are slightly farther from the center ...
*November 26, 2010*

**physics**

One of the Echo satellites consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. Suppose a meteor having a mass of 9.2 kg passes within 4.4 m of the surface of the satellite. What is the gravitational force on the meteor from the satellite at ...
*November 26, 2010*

**Physics**

Computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. For instance, as a car is going through a turn, a speed of 201 mi/h (89.847 m/s) and a centripetal acceleration of 4.00g (four times ...
*November 25, 2010*

**Physics**

A stone is tied to a string (length = 0.800 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the maximum tension in ...
*November 25, 2010*

**Physics**

I tried working this out and I got 495 which is wrong. im not sure what to do. A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity ...
*October 26, 2010*