Saturday
September 5, 2015

Posts by j


Total # Posts: 788

science
describe the relationship between an element's placement in the periodic table and the number of electrons in its outermost energy level
January 10, 2010

geometry
IF CIRCLE HAS 10 INCH DIAMETER HOW MANY INCHES ARE IN THE CIRCOMFERENCE?
December 27, 2009

psychology
The Outer Person
December 21, 2009

Persuasive Essay
why do you think so?
December 20, 2009

Persuasive Essay
what do you think about the new healthcare reform?
December 20, 2009

english
Should dying people be kept on life support?
December 19, 2009

marketing
timeliness in handling a customer's orders, questions a nd complaints is not important. true or false?
December 17, 2009

compose
if 3.85 L of carbon monoxide was collected over water at 25 degrees celsius and 689 mmHg how many grams of formic acid were consumed?
December 8, 2009

science
why is the angle of rays of sunlight so important in determining the amount of energy collected by the earth
December 7, 2009

math
An item regularly priced at is on sale at a discount of . What is the sale price of the item?
December 3, 2009

algebra
what would be the cost of something that is on sale for 40% off if the regular price is $180
November 30, 2009

chemistry 11
mrs. lawsons chem ll? tfox?
November 22, 2009

economics
How does the devaluation of a currency reduce or increase a trade deficit? Can you give a real world example?
November 20, 2009

Facility Planning
has anyone done a paper about hospital/clinic that is being renovated or needs re-construction?
November 14, 2009

social studies
according to maslow,our lowest or most fundemental needs and motives center around a:issues of esteem b:the need for love and belonging c:self-actualization d:physical needs
October 19, 2009

physics
Nah bobpursely is definitely wrong. Anyone know how to solve this?
October 11, 2009

Physics
Help me anyone please
October 4, 2009

chemistry
Hydrochloric acid can be prepared using the reaction described by the chemical equation: 2 NaCl(s) + H2SO4(l) ----> 2 HCl(g) + Na2 SO4(s). How many grams of HCl can be prepared from 393 g of H2SO4 and 4.00 moles of NaCl?
September 30, 2009

Gr. 12 Data MAnagement
Don't know why, thats just what the back of the book says :s
September 23, 2009

Gr. 12 Data MAnagement
wrong its 210
September 23, 2009

algebra word problem
I still don't understand it
September 17, 2009

algebra word problem
find three consecutive positive numbers such that the product of the first and third minus the second, is 1 more than 6 times the third
September 17, 2009

science-chem
25 mL = .025 L, not .25L
September 17, 2009

science
Use kinematics to calculate the height for the firstball, which is Vf=0 a=9.8 t=1.5 because you take the total time it take to go up and come back down and divide it by 2. 3/2 = 1.5 getting an initial velocity of Voy= 14.7m/s V = t(9.8) = 1.5(9.8) = 14.7 This must have the ...
September 8, 2009

math
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60 mph and Train B is traveling 64 mph. Train A passes a station at 7:15 AM. If Train B passes the same station at 7:45 AM, at what time will Train B catch up to Train A?
August 28, 2009

calculus
Carbon-14 is a radioactive substance produced in the Earth's atmosphere and then absorbed by plants and animals on the surface of the earth. It has a half-life (the time it takes for half the amount of a sample to decay) of approximately 5730 years. Using this known piece ...
July 24, 2009

pre calc
Find a linear factorization of: f(x) = x^3 + 5x - 6. thanks.
June 17, 2009

chemistry
The oxidation reaction would be K yields K+ + e- (When adding the reduction-half and oxidation-half, the oxidation equation will be multiplied by 2.) Hope this helps.
June 1, 2009

Chemistry
You have to balance the charges of the ions in the compound. Fluorine has a charge of -1, so when magnesium replaces the iron (III), the new compound is MgF2. Now all that is left to do is balance the reaction. The sulfate group has a charge of -2, meaning lithium sulfate is ...
June 1, 2009

chemistry
An aqueous solution with a pH of 3.00 is diluted from 2.0 L to 4.0 L. Wht is the pH of the diluted solution?
May 5, 2009

6thgrade math
yes =}
April 29, 2009

com
Prepare a 1,050- to 1,750-word paper in which you analyze the ethical and legal aspects associated with harrassment, addressing the following topics in your paper: 1.Describe the current moral and ethical issues faced by managers involving your selected topic. 2.Explain how ...
April 27, 2009

math
You can tell this isn't a page dealing with English because no one here knows how to speak it properly.
March 30, 2009

Economics (MRS)
Aargh font didn't come out right. I meant MRS of U(x,y) = (xy)^0.5 (ie sqaure root of xy) and (x+y)^0.5.
March 19, 2009

Economics (MRS)
What is the marginal rate of substitution for U(x,y) = ãxy? ,ã(x+y)?
March 19, 2009

boy scouts
what is the meaning of life
March 7, 2009

Calculus
Evaluate the integral: sin^2(5x)cos^2(5x)dx
February 22, 2009

Calculus
How do I evaluate this integral: x^9cos(x^5)dx Hint: First make a substitution and then use integration by parts.
February 22, 2009

Chemistry
How do I prepare a solution of 0.0025M Fe3+ by dissolving the appropriate amount of ferric ammonium sulfate in 500 cm^3 of 0.0025M sulfuric acid?
February 22, 2009

biology
which objective of a compound microscope would show the largest feild of view
February 9, 2009

Math
How long after 7:30 are a clock's minute hand and hour hand 50 degrees apart? The answer is 17.3 minutes, but I don't know how to get it. Help!
January 11, 2009

Math
The half life of Uranium 230 is 20.8 days. How long would it take for 20% of Uranium 230 to decay?
January 11, 2009

Math
How long after 7:30 are a clock's minute hand and hour hand 50 degrees apart?
January 11, 2009

math
how would you find (4x + 3)squared
December 15, 2008

PHYSICS
A banked circular highway curve is designed for traffic moving at 60 km/h. The radius of the curve is 205 m. Traffic is moving along the highway at 40 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the ...
December 4, 2008

AP Physics
While two forces act on it, a particle is to move at the constant velocity v = (3 m/s) i - (4 m/s) j. One of the forces is F1 = (2 N) i + (- 6 N) j. What is the other force? ( _____ N) i + ( _____ N) j Only two horizontal forces act on a 3.0 kg body that can move over a ...
November 13, 2008

CHEMISTRY
I've been trying to do this problem but I would get confused and stuck.. Consider a sample of a hydrocarbon at 0.959 atm and 298 K. Upon combustion the entire sample in oxygen, you collect a mixture of gaseous carbon dioxide and water vapor at 1.51 atm and 375 K. This ...
November 7, 2008

Statistics
Question 1 Use the following research question and data for questions 1 - 6. A researcher is examining the effects of a computer-based training program designed to teach algebra. The researcher randomly selects subjects for two groups and gives one group the computer training ...
October 18, 2008

Math
WELLIT IS ABOUT WHEN THY WRITE TO ROUND TO THE NEAREST NUMBER THE HAVE TO SAY THOUSND MILLON OR TENS YOU LOOK AT THE NUMBER AND CIRCLE IT
October 14, 2008

physics
Why do we cross multiply. I though you multiply 100 x 5 then 75 x 5 and then divide and multiply by 100
October 14, 2008

Math check 3
(a+15)(a+7)
October 12, 2008

anatomy
what kind of cells would form a scar on the head after cancer had been removed.
October 5, 2008

chemistry
5.2*10^5
September 21, 2008

HCA 270 Appendix C
Im aslost as you
August 29, 2008

english
Which sentence is correct the one with or without the comma? In the beginning there was man. In the beginning, there was no man.
August 16, 2008

Physics
A force of 2.3 N is exerted on a 6.6 g rifle bullet. What is the bullet's acceleration
June 9, 2008

physics
ohh..sorry! It didn't turn out the way I typed it
May 5, 2008

physics
Calculate the energy released in the fusion reaction 2 3 4 1 1 H + 1 H->2 H +0 n. The atomic mass of 3 1 H (tritium is 3.016049 u. I am lost! help please!
May 5, 2008

physics
A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start
May 5, 2008

Physics
A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start
May 5, 2008

Physics
I don't know how to get the frequency, I think if I can figure that out I could get the rest, but I am not sure where the two 75 W come in and the 5% like where am I suppose to put them in any equation?
April 28, 2008

Physics
A 75 W light source consumes 75 W of electric power. Typically only about 5% of this energy is emitted as visible light of wavelength 600 nm. (a) Calculate the frequency of the emitted visible light. (b) How many photons per second of visible light does the source emit? (c) Is...
April 28, 2008

Physics
A laser used to weld detached retinas emits light with a wavelength of 652 nm in pulses that are 20 ms in duration. THe average power expended during each pulse is .600 W. (a) How much energy is in each pulse, in joules and electron volts? (b) What is the energy of one photon ...
April 28, 2008

Physics
What is the thinnest film of a coating with n=1.42 on glass n=1.52 for which destructive interference of the red component (650 nm) of an incident white light beam in air can take place by reflection? I am confused on the n's and I have no idea what equation to use, it ...
April 21, 2008

Physics
Coherent light of frequency 6.32 * 10^14 Hz passes through two thin slits and falls on a screen 85 cm away. You observe that the third bright fringe occurs at +- (plus or minus) 3.11 cm on either side of the central bright fringe. (a) How far apart are the two slits? (b) At ...
April 21, 2008

Physics
Two small stereo speakers A and B that are 1.4 m apart are sending out sound of wavelength 34 cm in all directions and all in phase. A person at point P starts out equidistant from both speakers and walks so that he is always 1.5 m from speaker B. For what values x will the ...
April 21, 2008

us history
What gropu was largely responsible for funding the builing of the railroad system in the U.S.?
April 19, 2008

Physics
A certain digital camera having a lens with focal length 7.5 cm focuses on an object 1.85 m tall that is 4.25 m from the lens. (a) How far must the lens be from the photocells? (b) How tall is the image on the photocells? Is it erect or inverted? (c) A SLR digital camera often...
April 14, 2008

Physics
You want to take a full length photo of your friend who is 2 m tall, using a 35 mm camera having a 50 mm lens. The image dimensions of 35 mm film is 24 mm by 36 mm, and you want to make this a vertical photo in which your friend's image completely fills the image area. (a...
April 14, 2008

Physics
You want to take a full length photo of your friend who is 2 m tall, using a 35 mm camera having a 50 mm lens. The image dimensions of 35 mm film is 24 mm by 36 mm, and you want to make this a vertical photo in which your friend's image completely fills the image area. (a...
April 14, 2008

Physics
A certain digital camera having a lens with focal length 7.5 cm focuses on an object 1.85 m tall that is 4.25 m from the lens. (a) How far must the lens be from the photocells? (b) How tall is the image on the photocells? Is it erect or inverted? (c) A SLR digital camera often...
April 14, 2008

science
Why is the mechanical advantage of an inclined plane less than 1
April 13, 2008

Physics
The crystalline lens of the human eye is a double convex lens made of material haveing an index of refraction of 1.44. Its focal length in air is about 8 mm which also varies. We shall assume that the radii of curvature of its two surfaces have the same magnitude. (a) Find the...
April 7, 2008

Physics
A mirror on the passenger side of your car is convex and has a radius of curvature with magnitude 18 cm. (a)Another car is seen in this side mirror and is 13 m behind the mirror, if the car is 1.5 m tall, what is the height of its image? I can't figure this one out! help ...
April 7, 2008

Physics
my book says the answer is 39 degrees..
April 7, 2008

Physics
If the critical angle for light at an interface between certain substances is 54.2 degrees, what is the polarizing angle at this same interface? I am confused!
April 7, 2008

math riddle ALGEBRA WITH PIZZAZZ
How does a hawaiian baritone laugh? A -low- ha
April 6, 2008

Physics
During 2004, japanese scientists successfully tested two solar sails. One had somewhat complicated shape that we shall model as a disk 9 m in diameter and 7.5 um thick. The intensity of solar energy at this location was about 1400 W/m ^2. (a) What force did the sun's light...
March 31, 2008

Physics
We can reasonaly model a 75 W incandescent lightbulb as a sphere 6 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to nonvisible infrared radiation. (a) What is the visible light intensity (in W/m^2) at the surface of the ...
March 31, 2008

Physics
Medical x rays are taken with electromagnetic waves having a wavelength around .1 nm. What are the frequency, period, and wave number of such waves? ok I got the frequency as 3 * 10^18 Hz and the wave number as 6.3 *10^10 rad/m but I can't seem to remember how to get period.
March 31, 2008

Physics
In TV picture, faint, slightly offset ghost images are formed when the signal from the transmitter travels to the receiver both directly and indirectly after reflection from a building or some other large metallic mass. In a 25 inch set, the ghost is about 1 cm to the right of...
March 31, 2008

Physics
ok thank you! I wasn't using the right numbers!
March 31, 2008

Physics
When a solar flare erupts on the surface of the sun, how many minutes after it occurs does its light show up in an astronomer's telescope on earth? I am totally confused..help!
March 31, 2008

Physics- energy
Question 1The best way to determine levelness is to see if slope of velocity versus time for both directions are equal but opposite. Question 4:The greatest magnitude of net force is when the cart is going uphill. Uphill has a Net force greater by twice friction. It is not ...
March 27, 2008

cultural diversity
What is a current issue between Native Americans and the Federal Government. Indentify the legislation that you think is linked to the issue, and explain why you think there is a connection. Help Please!
March 25, 2008

Physics
An inductor used in a dc power supply has an inductance of 12 H and a resistance of 180 ohms and carries a current of .300 A. (a) How much energy is stored in the magnetic field? (b) At what rate is thermal energy developed in the inductor? ok once again I got part (a) .540 J...
March 18, 2008

Physics
A transformer consists of 275 primary windings and 834 secondary windings. If the potential difference across the primary coil is 25 V, (a) What is the voltage across the secondary coil? (b) what is the effective load resistance of the secondary coil if it is connected across ...
March 18, 2008

Physics
An inductor used in a dc power supply has an inductance of 12 H and a resistance of 180 ohms and carries a current of .300 A. (a) How much energy is stored in the magnetic field? (b) At what rate is thermal energy developed in the inductor? ok once again I got part (a) .540 J...
March 18, 2008

Physics
A transformer consists of 275 primary windings and 834 secondary windings. If the potential difference across the primary coil is 25 V, (a) What is the voltage across the secondary coil? (b) what is the effective load resistance of the secondary coil if it is connected across ...
March 18, 2008

Chemistry
What is the mass in grams of 1.02X10^24 molecules of NaCl?
March 11, 2008

Physics
A closely wound rectangular coil of 80 turns has dimensions of 25 cm by 40 cm. The plane of the coil is rotated from a position where it makes an angle of 37 degrees with a magnetic field of 1.10 T to a position perpendicular to the field. The rotation takes .06 s. What is the...
March 3, 2008

Physics
A coil of wire with 200 circular turns of radius of 3 cm is in a uniform magnetic field along the axis of the coil. the coil has R=40 ohms. At what rate, in Teslas per second, must the magnetic field be changing to induce a current of .150 A in the coil? I don't know if I ...
March 3, 2008

Physics
ok I am confused, because I have the answer in the back of my book it says it is D/square root of 2
March 3, 2008

Physics
If a magnetic flux passes through a circular coil when its diameter D, what should be its diameter (in terms of D) so that only half as much flux passes through it in the same field? Assume that the magnetic field is uniform over the area in both cases. I am totally lost! I ...
March 3, 2008

english
Okay. Thank you for your help.
February 26, 2008

english
Do I have to make them specific if that is my top sentence for a paragraph that relates back to this thesis: The characters of the novel demonstrate how misery drives people to do things they would not normally do.
February 26, 2008

english
how can i word this differently: People advise others to stay clear of the horrible consequences of despair.
February 26, 2008

English
Thank u so much. that helped a tons. So the other ones don't need any commas? (that's what i'm worried about). thanks again.
February 26, 2008

English
Can someone please check the grammar in the following sentences. Please. 1. Normally Victor takes pleasure in spending time with his family; however, when he feels down he opts for solitude. 2. The creature begins to feel alone and vows revenge. 3. This is the same creature ...
February 26, 2008

Physics
An electron beam of a TV picture tube is accelerated through a potential difference of 2.00 kV. It then passes into a magnetic field perpendicular to its path, where it moves in a circular diameter of .360 m. What is the magnitude of the field? I am lost. I keep getting the ...
February 25, 2008

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