Friday
November 28, 2014

Posts by Laura


Total # Posts: 1,039

O-Chem
Write the structural formula of a compound with an unbranched chain of five carbon atoms that is an alkenoic acid.
November 24, 2014

Calculus
Of the infinitely many lines that are tangent to the curve y = −7 sin x and pass through the origin, there is one that has the largest slope. Use Newton's method to find the slope of that line correct to six decimal places.
November 20, 2014

Science/Math Question
So in school, I am doing a " planet paper roll comparison " So the scale of the diameter of one planet is 0.943cm or something.. How do I measure it on paper?
November 20, 2014

Science Technology
How was the camera developed ? ( Who made it )
November 19, 2014

Science Technology
does it mean to put in something?
November 19, 2014

Science Technology
the last sentence wasn't clear to me. Please explain.
November 19, 2014

Science Technology
Originally the camera was made to capture a moment in time quickly and exactly. Paintings often reflected the opinion of the painter in their art, however, photos show exactly what was happening. Photos can be biased but nonetheless they are real. Photography started becoming ...
November 19, 2014

Science Technology
I tried reading that but I don't understand
November 19, 2014

Science Technology
Can someone give me a brief explanation to why Cameras were developed ? Please make it short and simple.
November 19, 2014

Science- Very Urgent
And also what do u mean by will give rise to a ...
November 14, 2014

Science- Very Urgent
Thank you so much
November 14, 2014

Science- Very Urgent
is it reasonable to expect that these models will change again in time? Explain. Like the bohr diagram and etc;
November 14, 2014

Science
In what ways is Bohr's model of the atom similar to and different from Thomson's model? I still need someone to help me.. I dont know the similarities and differences..
November 14, 2014

Science
But I dont really know how they are similar or different..
November 14, 2014

Science
The Bohr Model has an atom consisting of a small, positively-charged nucleus orbited by negatively-charged electrons. I dont know about thomson's model.
November 14, 2014

Science
In what ways is Bohr's model of the atom similar to and different from Thomson's model?
November 14, 2014

math
Sandy measures the length of a hockey stick. she says it it 4 units long. what unit did she use? A. cubes B. inches C. feet D. yards
November 4, 2014

Physics
What is the momentum (in kg m/s) of a 131- kg football player running at a top speed of 9.9 m/s? What is the momentum of a 9.32- g rifle bullet traveling at 618 m/s
November 4, 2014

Math
Joe is making a rectangular mosaic with colored tiles. He will use 20 tiles to make his design. What are all the different arrangements of tiles that Joe could use to design his mosaic?
October 23, 2014

Physics
A highway curve with a radius of 800 m is banked properly for a car traveling 100 km/h. If a 1620- kg Porshe 928S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid?
October 6, 2014

(MCV4U) Vectors
The air velocity of helicopter Hal is 200km/h due west. Hal's ground velocity is 180km/h in the direction N80*W. Determine the wind velocity. Please help! I know i should be drawing a diagram but I am very confused with how to do this question! Thank you!
October 3, 2014

math
A room measures 14 feet by 20. feet. How many tiles would it take to cover the deck if the square tiles measure 8.0 inches to the side?
September 30, 2014

math
cup 3/4 full 1/6 is poured out. what fractionof the whole bottle is poured out x fractions= whole # .
September 15, 2014

physics
Given the position function s(t) = t cos t, find the velocity function. Answer v(t) = -sin t v(t) = sin t v(t) = cos t - t sin t v(t) = cos t + t sin t
May 28, 2014

Algebra
Player lost 15 yards, gained 3,then 21 in three successive running plays. What was his total gain and loss
May 23, 2014

science
An object moves up and down the y-axis with an acceleration given as a function of time t by the expression a equals A sine of omega-t. , whereA. and omega. are constants. What is the period of this motion? Answer omega. 2 pi omega. omega squared times A. 2 pi over omega. ...
May 23, 2014

math homework help
motorcycle company invested 250,000 at 4.5% compounded monthly to be used for the expansion of their manufacturing facilities how much will available for the project in 3.5 years?
May 20, 2014

Writing
How are mobile computing, Web 2.0, and social media changing how IT systems are used?
May 19, 2014

Health Information Management Statistics
In September, the hospital has 23.652 admissions. Of these, 1,569 were readmissions. What is the hospital's readmission rate
May 12, 2014

Algebra
can you show how the equation is solved?
May 3, 2014

Algebra
A moving picture theater usually took in $220 an evening on ticket sales. The manager found out that by reducing the price of tickets by 5 cents, 200 more persons attended, and the box office receipts were $80 more an evening. How many persons attended before the reduction in ...
May 3, 2014

Math word problem
can you show how the equation would be solved?
May 3, 2014

Math
I understand the second step but how did you get the third answer?
May 1, 2014

Math
I need help with the below math problem. I have to write out the steps to show the answer. 2(x - 14) + 3 = 7x + 5
May 1, 2014

History HELP! ASAP
thanks,very helpful!
April 16, 2014

History HELP! ASAP
Congress's adoption of the declaration of independence confirmed a decisive shift in the conflict between the colonies and britain. Why did the colonies make this decisive breaak in 1776? In your answer, discuss some of the arguments for and against independence.
April 16, 2014

History HELP! ASAP
In the mid-eighteen century, how did native americans influence relations between european nations? between britain and the colonies?
April 16, 2014

Chemistry
In the SN2 mechanism, considering that the nucleophile attacks at the same time as the leaving group leaves, what would the effect of having a hindered (crowded) reaction center be on the rate of the reaction? Would you expect it to react slower or faster than an unhindered ...
April 14, 2014

math
tim has a det of $872.23. If he pays 40 percent of the debt this month and 50 percent of the remainder next month, how much does tim still owe?
March 26, 2014

MATH :D
I got 4,950 but my friend got 365 Start listing them out!!! 8)
March 7, 2014

History
Thanks!
March 6, 2014

History
How did tea change the life in Europe?
March 6, 2014

math
If you separate the socks with equal charges 4 x10-9 C until they’re 7 cm apart, what force will each sock exert on the other?
March 3, 2014

Analytical Chemistry
Match the following terms about analytical precipitations to their definitions: A.) Coprecipitation B.) Adsorption C.) Absorption D.) Gathering E.) Masking F.) Digestion G.) Peptization 1.) Inclusion or occlusion of impurities within a crystal. 2.) Binding of impurities to the...
February 28, 2014

Chemistry
Never mind, I figured out that it shouldn't make a difference. That's what I originally thought, but just wanted to clarify.
February 27, 2014

Chemistry
If say 70 mL of water is heated vs 100 mL of water, would the temperature be different or does the amount of the substance not make a difference on the temperature Thanks!
February 27, 2014

physics
The pulley is light and frictionless. Find the mass M1, given that M2 (7.00 kg) is moving downwards and accelerates downwards at 3.01 m/s2, that θ is 15.0°, and that μk is 0.270.
February 25, 2014

English
Can someone pleases explain what this sentence means...this sentence is talking about the middle class in France. "They viewed universal male suffrage as the ultimate concession to be made to popular forces, and they strongly opposed any further radical republicans and ...
February 19, 2014

Physics
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.490. What is ...
January 1, 2014

Physics
it's still incorect.. can you explain it a bit more please?... Thank you for all your help.
December 31, 2013

Physics
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.490. What is ...
December 31, 2013

physics
A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.490. What is ...
December 30, 2013

english
Thank you
December 10, 2013

english
Thank you
December 10, 2013

english
I have to write an English paper discussing a current event; I chose Obama Care, but was told it is not a current event. I know the bill was passed in 2014, but discussions are still being posed about it and there are continuing developments, so why is this not a current event?
December 10, 2013

physics
A boy jumps at a speed of 16.0 m/s at an angle of 20.0 above the horizontal. How long does he stay in the air before touching the ground? A. 1.53 s B. 1.12 s C. 3.07 s D. 4.2 s
December 6, 2013

physics
Person A walks 6.0 m at an angle of 30 north of east. Person B walks 7.0 m at an angle of 42 west of north. How does the component of the displacement of person A along the north direction compare with the component of the displacement of person B along the north direction? A...
December 6, 2013

physics
Which of the following statements is a true statement? A. A vector can have positive or negative magnitudes. B. A vector's magnitude cannot be more than the magnitude of one of its components. C. If the x-component of a vector is smaller than its y-component then that ...
December 6, 2013

Chemistry
What is 0.7g of SO2 ..and how would you do this equation? Thanks,
November 27, 2013

Chemistry
How many moles in 0.7g of SO2 ..and how would you do this! Thanks
November 27, 2013

World History
Which remained strongly organized and grew more powerful as the Western Roman Empire collapsed? the military command the Christian Church the Orthodox Church the trade networks
November 26, 2013

physics
A 0.355-kg object undergoing SHM has ax = 2.30 m/s2 when x = 0.235 m. What is the time for one oscillation?
November 16, 2013

Physics
A ball, of mass 0.3Kg, is held on the inside of a smooth hemispherical bowl at a height 0.09 m above the base. It is then released. Assuming there is no friction, the acceleration due to gravity, g, is 10 m/s2 and the potential energy is zero at the base of the bowl - What is ...
November 15, 2013

English II
Read the following poem and answer the question that follows. "Fame is a Bee," by Emily Dickinson Fame is a bee, It has a song— It has a sting— Ah, too, it has a wing. Of what literary device is this poem an example? A. Extended metaphor B. Onomatopoeia C. ...
November 12, 2013

English II
I think is B... But im not sure...
November 12, 2013

English II
Read the following poem and answer the question that follows. "I Like to See it Lap the Miles" by Emily Dickinson I like to see it lap the miles, And lick the valleys up, And stop to feed itself at tanks; And then, prodigious, step Around a pile of mountains, And, ...
November 12, 2013

English (PLEASE I NEED HELP)
Read the following short excerpt of student writing. Use your vocabulary and grammar knowledge to determine which suggestions you would make to improve his or her grammar and word choice. I really thought she loved me but I discovered her grave betrayal one afternoon. It was ...
November 7, 2013

Grammar
Read the following short excerpt of student writing. Use your vocabulary and grammar knowledge to determine which suggestions you would make to improve his or her grammar and word choice. I really thought she loved me but I discovered her grave betrayal one afternoon. It was ...
November 7, 2013

English II
Im between Affluent and Amicable..
November 7, 2013

English II
Read the sentence below and answer the corresponding question. Despite their differences, my father and mother had an __________ divorce. Which word best completes the sentence? adjunct affluent amicable amorous
November 7, 2013

English II
Is it D?
November 7, 2013

English II
Which of these sentences contains an oxymoron? A. Mr. Keynes was a workaholic who found vacations to be about as relaxing as six rounds wrestling with an alligator. B. Despite his desire to travel during his week off, Mr. Keynes was unable to think of any vacation spot as ...
November 7, 2013

English II
I think is C.
November 7, 2013

English II
from "EXTRICATING YOUNG GUSSIE" by P.G. Wodehouse She sprang it on me before breakfast. There in seven words you have a complete character sketch of my Aunt Agatha. I could go on indefinitely about brutality and lack of consideration. I merely say that she routed me ...
November 7, 2013

World History
Thank you Ms. Sue... Can you help me in this one? Which of the following contributed to the overthrow of the Umayyad dynasty by the Abbasid dynasty? A. The Umayyads failed to produce competent heirs. B. The Umayyad social policies were unpopular and led to revolts. C. The ...
November 7, 2013

World History
What impact did Emperor Constantine's establishment of the “New Rome” (Constantinople) have on the Roman Empire? A.The expense of building the new city impoverished the later Empire. B. The pope moved his headquarters from “Old Rome” to “New Rome...
November 7, 2013

chemistry
calculate the lowest values of the energies of an electron, a neutron and a photon which allows diffraction from the (1,0,1) planes of silicon, using Bragg diffraction. lattice parameter 0.542nm
October 28, 2013

Algebra 1 Math
an insect flies 20ft in 1 s. how fast does the insect fly in miles per hour?
October 23, 2013

chemistry
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure Y-:X:-Y could be abbreviated as XY2Z2. Classify these structures according to their shape. XY2Z,XY2Z2,XY2Z3,XY3Z,XY3Z2,XY4Z,XY4Z2,XY5Z The ...
October 19, 2013

Chemistry
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure Y-:X:-Y could be abbreviated as XY2Z2. Classify these structures according to their shape. XY2Z,XY2Z2,XY2Z3,XY3Z,XY3Z2,XY4Z,XY4Z2,XY5Z The ...
October 19, 2013

Macroeconomics
cost in 2005 is 15.00 cost on 2009 is 20.50 Consumer price index (20.50/15.00)x100=137 I understand that part but my professor said to measure inflation he gave the answer 37% divide 37/4=9.25% 4 number of years 9.25% annual rate inflation how did he get 37 I am confused
October 13, 2013

Chemistry
Microwave ovens emit microwave energy with a wavelength of 13.0 cm. What is the energy of exactly one photon of this microwave radiation?
October 8, 2013

criminal justice
Are truth-in-sentencing laws a good idea? What are their implications for crime control? for due process? for costs to the public?
September 20, 2013

Criminal Justice
I feel their personal feelings need to be set aside when dealing with criminals. But the second part of the question I am confused on
September 20, 2013

Criminal Justice
two questions.. 1a) How much discretion should prosecutors, judges, and parole board members have in administering the criminal sanction? b) What justifies the latitude given these individuals?
September 20, 2013

Geometry
Find the coordinates of the midpoint of a segment having the given endpoints. Then find the distance between the endpoints. 1. G(0,0), H(-3,4) 2. A(-4,-4), W(-2,2) 3. N(5,2), K(-2,8)
September 8, 2013

Finance
Mrs. Jones owns 100 shares of stock in Daimler-Benz valued at 16.5 Euros per share. What is the value in $U.S. of her stock if: 0.90 € = $1 Value of 100 shares at €16.5 per share 1,650.00 Euros Value of 1,650.00 Euros at 0.90 € = $1 is $1,833.33 0.70 € = $1...
August 24, 2013

Geography
2)a 3)e
July 16, 2013

Geography
1)The study of geography includes a)living in a dessert b)growing food c)predicting the weather d)studying people e) wearing protective clothing 2) which of the following country has no seaport a) Egypt b)Algeria c)Nigeria d)South Africa e)Uganda 3)about how many kilometers ...
July 16, 2013

Informal logic
suggests that Catherine’s local movie theater hardly ever shows romantic comedies
July 14, 2013

Physics
An object is moving with constant velocity -->v Which situation is impossible in such a circumstance? 1. One force acts on the object. 2. Three forces act on the object. 3. No forces act on the object. 4. Two forces act on the object. 5. Four forces act on the object.
June 30, 2013

Physics
Consider a coin which is tossed straight up into the air. After it is released it moves upward, reaches its highest point and falls back down again. Air resistance can be neglected. What force acts upon the coin when it is at its highest point? a. Force acting up and ...
June 30, 2013

nau
5. (TCO 9) You have been tasked with analyzing an extremely large amount of data and to ultimately produce a report to share with the board of directors. The data is currently in a text file and has over two thousand records of data. Explain how you would use Excel to analyze ...
June 24, 2013

chemistry
Hi, I was hoping someone could double check a chemistry answer for me. I am trying to calculate the Ksp of Ag2CrO4. This question is based on a experiment to determine ksp experimentally. In the experiment the Ksp of silver chromate was calculated using a single displacement ...
May 26, 2013

Pre Calculas
A GARDENER HAS 60' of edging. She wants to use it to enclose a 120 square foot rectangular area. She does not have to use up all of the edging. what are the possible lengths that a side of the rectangle can have? Answer using interval notation. Hint: if the length of the ...
May 23, 2013

Language
The answers are... 1. C 2. B Just did the test. your welcome
May 12, 2013

Language
The answers are... 1. C 2. B
May 12, 2013

Chem 110
supposed that a liter of sample water contains 1.00 mmol of Ca2+ ions and 1.50 mmol HCO3- ions. how many millimoles of CaCO3 will precipitate if this water is boiled for 15 mins?
May 9, 2013

Chemistry
I am having trouble with this equation and calculating the enthalpy of formation. 2 NaHCO3 (s) --> Na2CO3 (s) + H2O (g) + CO2 (g) delta H129.2kj I get as far as this step and then I don’t know what to do next. delta H= [1*delta H (Na2CO3) + 1* delta H(H2O (g)) + 1* ...
April 30, 2013

Chemistry
The balanced equation for the decomposition of sodium bicarbonate is 2 NaHCO3 (s) --> Na2CO3 (s) + H2O (g) + CO2 (g)delta H 129.2. Using the enthalpies of formation, calculate the enthalpy of formation of sodium bicarbonate.
April 30, 2013

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