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July 30, 2015

Posts by andy


Total # Posts: 851

Calculus
line used for square = (40 - x) line used for circle = x Area = (area of square) + (area of circle) Area = (40-x)^2 + (pi*x^2)/4 Area' = (2)(-1)(40-x) + (pi*x)/2 = 0 x = 22.4 Is this max or min? Using x=20 for before the critical point, and x=30 for after the critical ...
January 20, 2010

physics
A. A uniform, upward-pointing electric field E of magnitude 3.00~103 N/C has been set up between two horizontal plates by charging the lower plate positively and the upper plate negatively. The plates have length L = 4 cm and separation d = 2.00 cm. An electron is then ...
January 20, 2010

MATH213
Calculators usually store more numbers internally than on the screen. Since you get 0.9998941, ask the student to subtract 1 from ANS. (If you don't have an ANS button, you can press the subtraction sign after pressing equal sign for the same effect as pressing "ANS&...
January 20, 2010

MATH213
The font didn't seem to process, so i did it in txt form again: a) sqrt(2*121) = sqrt(121) sqrt(2) = 11*sqrt(2) b) sqrt(144*2) = sqrt(144) sqrt(2) = 12*sqrt(2) c) sqrt(36*10) = 6*sqrt(10) d) not so sure about d... is nroot(162) a typo?
January 20, 2010

MATH213
a) ¡î(2*121) = ¡î121 ¡î2 = 11¡î2 b) ¡î(144*2) = ¡î144 ¡î2 = 12¡î2 c) ¡î(36*10) = 6¡î10 d) not so sure about d... is ©ú¡î a typo?
January 20, 2010

physics
Suppose that the attraction between the moon and the earth were due to Coulomb forces rather than gravitational force. What would be the magnitude of the charge required if equal but opposite charges resided on both earth and moon? Mass of earth = 5.98×1024 kg; mass of ...
January 19, 2010

social studies
i need to write a 4 paragraph criteria essay on compare and contrast buddishm and hinduism on a 6th grade level
January 13, 2010

gr.11 physics help!
When an iceberg floats in the ocean, what fraction of it is visible?( The relative density of ice is 0.92, and hte relative density of sea water is 1.03)
January 6, 2010

adult education
what type of language should you use in the invitation for a mechanical engineering professors?
January 6, 2010

Pre-Calculus
The Richtr scale was evied y Cahrles F.Richter a American geologist. The scale is based on the equation M(x)=logx/x0(little 0), where x is the seismographic reading of the earthquake and x0 i 1 miron 0.001mm (the seismographic reading of a zero-level earthuquake) a) Determine ...
December 21, 2009

physics bobpursly help still having trouble
A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ...
December 2, 2009

physics Bob Pursley plz help
ok so I calculate PE when R is (1/1.019)*3.38e6 and then calculate Pe when R is just 3.38e6? Or are you saying multiple (Pe)(1/1.019-1/1)?
November 30, 2009

physics Bob Pursley plz help
A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ...
November 30, 2009

physics
What is the pressure change in water going from a 3.0- cm-diameter pipe to a 1.8- cm-diameter pipe if the velocity in the smaller pipe is 3.0 m/s? Im using the equation pv2^2(A2^2-A1^2)/2A1^2 and get (1000)(3)^2(1.8^2-3^20/(2(3)^2) and get -2880 Pa but I'm getting wrong? ...
November 30, 2009

algebra
to find a percentage you do this X-number given Y-total number (X/Y)*100 so for example (25/50)*100= 50% you can also think of it this way 50*.50=25
November 30, 2009

Physics Meteorite
A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ...
November 30, 2009

Physics 11
A string that is 90cm long with a diameter of 0.75 mm and a tension of 60 N has a frequency of 100 Hz. What new frequency is heard when the length of the string is 100 cm long. Anyone help me please?
November 25, 2009

Physics 11
Can someone give me an accurate definition on "Principle of Superposition"? Extra info: Im studying Physics 11, Sound Unit
November 24, 2009

physics
A wheel initially rotating at an angular speed of 1.2 rad/s turns through 34 revolutions during the time that it is subject to angular accelaration of .4 rad/s/s. How long did the accelaration last? So I used theta=Wot+.5at^2. converted rev to rad. and set it up like a ...
November 18, 2009

physics
A 24 kg beam is attached to a wall with a hinge and its far end is supported by a cable. The angle between the beam and the cable is 90 degrees and the beam is inclined at an angle of 13.6 degrees with respect to the horizontal. What is the magnitude of the force that the beam...
November 18, 2009

physics entry
A meteor headed straight towards the earth has an approach speed of 2.00e3 m/s at a distance of 7 earth radii from the center of the earth. What will be its speed when it reaches earth a 6.38e6 m(ignore the effects of atmosphere)?
November 17, 2009

physics escape
The escape speed from a distant planet is 42 km/s. If the accelaration of gravity on the planet is 11.0 m/s/s, what is the radius of the planet?
November 17, 2009

Physics 11/Chemistry 11
What is the heating capacity of Zinc?
November 9, 2009

10th grade English
This is my short story essay. I've put some conversations now and then so please take that into account. I would really appreciate if you could fix any mistakes, awkward phrases or even how to make this essay a better writing. Thank You ¡®Honk! Honk! Move out of ...
October 29, 2009

Physics 11
Mark Ji shoots a 40gram arrow straight up in the air at 30m/s during a home archery training session a. assuming no air resistance, what is the maximum height that the arrow could reach? b. How fast is the arrow going when it hits the ceilings at a height of 15.0m?
October 28, 2009

trig
lx - 2l - lx + 2l > x The absolute value of x - 2 minus the absolute value of x + 2 greater than x. What is the Answer Please Help!
October 28, 2009

10th grade English
This is the ruff draft of my speech on environment conservation. I am the first speaker of my group so if I mention some names or awkward ending, it is because of that. Please fix any awkward phrases or mistakes as soon as possible. Thanks Can we achieve both economic growth ...
October 18, 2009

Physics 11
Wow thank you very much!!!!
October 15, 2009

Physics 11
SPH3U1 Two blocks of mass 500.0 g and 200.0 g are suspended vertically as shown in the diagram. The top string is lifted vertically upwards with a force of 8.48N on the 500.0 g Block (sorry no diagram) Thank you very much for your help
October 15, 2009

physics
If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)
October 11, 2009

physics
If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)
October 11, 2009

Physics
The mass of Venus is 0.8140 times that of earth, and its radius is 0.950 times that of earth. Calculate the acceleration of gravity at the surface of Venus. Express your answer in g's (i.e. as a ratio to our acceleration of gravity). 9.01×10-1 is the correct ratio ...
October 11, 2009

algebra
1/2x-9=11 ADD 9 TO BOTH SIDES: 1/2x=20 DIVIDE BOTH SIDES BY 1/2: x=40 (Dividing a number by 1/2 is the same as multiplying it by 2)
October 10, 2009

10th grade English
This is my essay for the forum that I am attentding in few weeks time. The topic is shown below. Please make any corrections and check any awkward pharses A.S.A.P Thank you Can we balance Economic Growth and Environmental Conservation? Can we balance economic growth and ...
October 3, 2009

Economics
What rate does the FOMC set? Is the the Federal Funds Rate or the Discount Rate?
September 25, 2009

Economics
Who can and who can't vote in the FOMC?
September 25, 2009

maths
one mountain is 5000 ft high and can be reached by cable car from another mountain 7000ft away the other mountain is 3000ft high what is the lenghtof the cableto link the two mountains
September 25, 2009

chem
I see what you are saying but does that answer the whole question of how many NaOH grams will be produced? Because when I made .0522 moles H2 into grams, I got 0.0526 and that is just the grams for H2.
September 21, 2009

chem
Would it just be .222 moles H2O x (1 mole H2/2 moles H2O) because this would cancel the H2O and it would leave me with 0.111 mole H2?
September 21, 2009

chem
ok. 0.0522 moles Na 0.222 moles H2O
September 21, 2009

chem
i don't really understand your answer
September 21, 2009

chem
you lost me
September 21, 2009

chem
If 1.2 grams of sodium are reacted with 4.00 mL water, how much NaOH is produced? density of water= 1.00g/mL
September 21, 2009

chemistry
If 1.20 grams of sodium metal are reacted with 4.00mL of water, how many grams of NaOH will be produced (density of water= 1.00g/mL)
September 21, 2009

history during the lives of early people
I need help in how I can approach this assignment,so that I cover all the areas that are to be included and still write an interesting and quality paper, showing the ways of life during this time in history. The assignment reads like this:You are to write a minimum of 1 page ...
September 19, 2009

place value through hundred thousands
What is the expanded form for 417,058
September 15, 2009

physics
A Hollywood Daredevil plans to jump a canyon on a motorcycle. There is a 15 m drop and the horizontal distance originally planned was 60 m but it turns out the canyon is really 69.6 m across. If he desires a a 3.2 second flight time I've figured out the upward motion part ...
September 12, 2009

physics
ok thanks very much I understand the upward motion part of the problem. I am still have trouble with the downward motion can someone explain. Thanks for the help
September 12, 2009

physics
yes, same person I just dont understand why im getting this problem wrong for a. predict the launch angle. I do tan inverse of 7.87/21.75 giving an angle of 19.9 degrees so I tried subtracting from 180 degrees but im not getting it right either way can you explain please?
September 12, 2009

physics
A Hollywood Daredevil plans to jump a canyon on a motorcycle. There is a 15 m drop and the horizontal distance originally planned was 60 m but it turns out the canyon is really 69.6 m across. If he desires a a 3.2 second flight time a. what is the correct angle of his launch ...
September 12, 2009

physics
A Hollywood Daredevil plans to jump a canyon on a motorcycle. There is a 15 m drop and the horizontal distance originally planned was 60 m but it turns out the canyon is really 69.6 m across. If he desires a a 3.2 second flight time a. what is the correct angle of his launch ...
September 11, 2009

physics
A ball is thrown upward from a platform 5.1 meters high with a speed of 13 m/s at an angle 45 degrees from the horizontal. what is the magnitude of its velocity when it hits the ground?
September 11, 2009

10th grade English
This is my history essay (well.. a speech) due in 5 days. Please correct any mistakes or awkward phrases ASAP. Thank You Good morning/afternoon Mr Bean and fellow classmates. Australia, as a country, has a short, yet explicit history since the arrival of European settlers. In ...
September 11, 2009

10th grade English
This is my personal reflective essay. Please fix any mistakes or awkward phrases ASAP My body and my mind became lighter than air around me, as I threw myself on a couch where my back enjoyed being at. Released from the monstrous term of school, I felt saint-like, as if I ...
July 26, 2009

math
A rectangle has area 6 cm (squared) and diagonal of length 2√5 cm. What is its perimeter? thanks
July 15, 2009

history
What effects did the American Antislavery Society have on America?
July 14, 2009

10th grade English
This is my English oral speech. Please check whether there are any mistakes or awkward phrases. Please help ASAP Published in 1974, Where the Sidewalk Ends by Shel Silverstein is a poem which depicts our typical human life. In this poem, he criticises our life full of distress...
June 3, 2009

physics incline
A cord connected at one end to a block which can slide on an inclined plane (incline 27 degrees) has its other end wrapped around a cylinder resting in a depression at the top of the plane (and the other angle at bottom is not a right angle, but 58 degrees). Determine the ...
May 22, 2009

Music
---Okay! I know lots of you out there like music! does anyone know any good Anti-bullying song? Please have a song that will work with the following -Guitarist -Bassist -singer -drummer -violin (optianal) - try to make it a upbeat song Thanks everyone!
May 5, 2009

English
A topic sentence for cooking meals, cleaning the home, shopping and running errands, and providing love and guidance.
April 20, 2009

10th grade English
This is my To Kill a Mockingbird monologue I am doing Nathan Radley. Any suggestions or corrections will be helpful I know what I¡¯m doing Arthur and it is for our own good. I told you many times about staying away from those Finches. Lord, I have. You keep putting ...
March 26, 2009

10th grade English
Remaining essays I had trouble posting my essay in one go. please correct them and any suggestions will be helpful Oh, Leonie, isn¡¯t it hard making contact with other people in this kind of place? Everyone¡¯s enjoying themselves but, I don¡¯t ...
February 25, 2009

10th grade English
This is second part of my previous Essay please help ASAP and maybe some suggestions Similar to Gwen, Coral is depicted as a withdrawn person who suffers from loses of her son. She seems to be locked inside an unseen world where she has to hide her true identity. While Coral ...
February 24, 2009

10th grade English
Please check any mistakes or maybe restructure some of the sentences. Need help ASAP Away, written by Michael Gow is an Australian play set in the summer of 1967-68. In the play, three unique yet in a sense stereotypical families experience their internal change by going ...
February 23, 2009

math
No Problem XD
February 11, 2009

math
try 0.25 x 80 will get you the answer then minus the number with the answer the calculator gave you It should look like this 0.25 x 80= 20 80- 20= 60 60/80 is 80% and 20/80 is 25%
February 11, 2009

geography
NewFound land is part of Canada there are 10 Provinces and 3 Territories -Im Canadian XD
February 11, 2009

History WWI
durring the war how did soldier broke "Stalemate", which was when both sides didn't have any ammo left or were too tired to fight ------Thanks--------
February 11, 2009

Re: Math
just re posting, because i haven't gotten a response for awhile now. Find the slope of the line y+mx+6 that passes through the point (-1,3).
February 3, 2009

Math
Find the slope of the line y+mx+6 that passes through the point (-1,3).
February 3, 2009

chemistry
1) i think this one is hydrogen bonding because in CH3OH, the H is bonded to an O. I think my teacher said all bonds have a tiny bit of dispersion force, but the main force is the H-bond. I am also confused, isn't h-bond also considered a dipole-dipole interaction? it'...
January 24, 2009

chemistry
So this is the case: liquid methanol, CH3OH is being prepared to be poured into a beaker of water. (THERE CAN BE MORE THAN ONE ANSWER FOR Q1-3) 1) What intermolecular forces are broken in the methanol when these substances are mixed? -hydrogen-bonding -dispersion forces -...
January 24, 2009

Please correct Essay
Lord of the Flies, written by William Golding, is one of the most famous novels around the world. It is a fiction story during the World War II, where groups of children crash land on a mysterious island and stay there until they are rescued. The novel contains several main ...
January 21, 2009

Math
An Egyptian Mummy stands upright in a case that is 3.5m high, and has a colume of 14m^3. The width of the case is half the length. What are the length and width of the case? Please leave an explanation Thanks!~~~
January 11, 2009

ESSAY
How was Brutus considered as ¡®the noblest Roman¡¯ despite the fact that he was one of the conspirators? Julius Caesar, written by William Shakespeare in 1599, was one of the most successful plays in our history. Although it is called Julius Caesar, the ...
January 7, 2009

essay
In the famous play, Julius Caesar, the most important characters would have to be Caesar and Brutus. Each character has its distinctive role, Caesar as the ruler of Rome and Brutus as one of the Caesar¡¯s best friends. They both have the same goal, but different ...
January 7, 2009

English
Please check my essay and make corrections. In the famous play, Julius Caesar, the most important characters would have to be Caesar and Brutus. Each character has its distinctive role, Caesar as the ruler of Rome and Brutus as one of the Caesar¡¯s best friends. ...
January 7, 2009

English
I've put a '/' key between each paragraphs. Thank you for helping. In the famous play, Julius Caesar, the most important characters would have to be Caesar and Brutus. Each character has its distinctive role, Caesar as the ruler of Rome and Brutus as one of the ...
January 7, 2009

English
Please check my essay and make corrections. In the famous play, Julius Caesar, the most important characters would have to be Caesar and Brutus. Each character has its distinctive role, Caesar as the ruler of Rome and Brutus as one of the Caesar¡¯s best friends. ...
January 7, 2009

5th grade
Why did many peple come to the Middle Atlantic colonies?
January 5, 2009

AP Stats
93% is right, instead of making a tree with .5 for the first two branches. The branch for taking prep should be .05 since 5% of the people taking the SATs have taken a prep course, then the branch for people who haven't taken a prep course for the SATs should be .95
January 2, 2009

Math
Thank You
December 11, 2008

Math
a gasoline pump delivers 4 2/5 gallons of gas per minute. How many minutes will it take to fill a gas tank that holds 16 1/2 gallons?
December 11, 2008

psy101
Many of the chemicals that affect the brain operate by a. absoring neural impulses b. imitating or cancelling the effects of neurotransmitters c. changing the sodium balance in the synapse d. duplicating the effect of the potassium in the nuclei
December 1, 2008

3rd grade
Yes, because only equal groups can be multiplied
November 12, 2008

general
Some states have high school starting at 9th grade while some start only in 10th. so when are the kids ready for AP classes? is this school dependent?
November 6, 2008

physics
k=F/x =1800/0.4 =4500 N/m
October 15, 2008

biology
Thanks....
October 9, 2008

biology
Can someone please give me an example of biogeochemistry
October 9, 2008

help on chem
What is the wavelength of light (nm) having a frequency of 1.82 x 1014 Hz?
October 8, 2008

help on
What is the wavelength of light (nm) having a frequency of 1.82 x 1014 Hz?
October 8, 2008

9th grade
what is the velocity of auarter dropped from a tower after 10 seconds?
October 5, 2008

Chemistry
3Cu+8HNO3--> 3Cu(NO3)2+ 2NO+4H2O How many moles of HNO3 are required to react with 6 moles of Cu? How many moles of Cu(NO3)2 are produced when 3 moles of Cu react? How many moles of Cu must react to produce 4 moles of NO? If 4 moles of NO are produced, how many moles of H2O...
July 24, 2008

english
Sra, Thank you for responding. No, I'm talking about the Latin alphabet (i.e. ABCDEFG, etc.) Rhyme scheme operates by assigning rhyming lines to a specific letter (so something like "Comrades all, that stand and gaze,/Walk henceforth in other ways;/See my neck and ...
July 14, 2008

english
When mapping out a poem's rhyme scheme and the poem exceeds the amount of letters in the latin alphabet what symbols does one use to continue mapping the rhyme scheme?
July 14, 2008

calculus
The two statements above is wrong. you first move around the dy/dx = (y-1)/x^2 into dy/(y-1) = dx/x^2 Then you integral where it turns to ln( (y-1)/C ) = -1/x Next you move the e from the ln to the other side (y-1)/C = e^(-1/x) After that you times C to both sides and move the...
May 19, 2008

Mathmatics
so, the answer would be like this (x^5/5)-3x^2+C
May 14, 2008

Mathmatics
I know, but I don't see what you mean Is 5-3x^2 all under x^5
May 14, 2008

Mathmatics
an would it be (x^5/5) or is the whole rest besides the C on the bottom.
May 14, 2008

Mathmatics
Wait, is that the answer
May 14, 2008

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