Sunday
September 21, 2014

Posts by sarah


Total # Posts: 3,884

Chemistry Need help ASAP
A proposed mechanism for a reaction is: (i) A + B2 = AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 = ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 = AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining ...
September 21, 2014

chemistry
A proposed mechanism for a reaction is: (i) A + B2 = AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 = ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 = AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining ...
September 20, 2014

Chemistry
A proposed mechanism for a reaction is: (i) A + B2 = AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 = ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 = AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining ...
September 20, 2014

chemistry
A proposed mechanism for a reaction is: (i) A + B2 AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining step? ...
September 20, 2014

stats
Checking the weather. 60% chance of rain at the bears football game. In the past, when it rains, bears win ,44% of the time and when it doesn't rain they lose 27% of the time. What's the probability that at the next game, the bears win in the rain?? Thanks
September 19, 2014

English
What is the main idea of from the Interesting Life of Olaudah Equiano
September 18, 2014

Chemistry
1. What does adding a salt like KCL do to the pH of a solution? 2. What does adding a base like KOH do to the pH of a solution
September 17, 2014

Early Childhood Education
A family-teacher study meeting should NOT include: A. classes on setting up a home library. B. information about the importance of play. C. a “make it/take it” class on homemade reading materials. D. a teacher-parent conference. Would the answer be A. or D.?
September 17, 2014

Early Childhood Education
That's why I then went with D. which seems like the best answer.
September 16, 2014

Early Childhood Education
I was thinking that it is either C. or D.
September 16, 2014

Early Childhood Education
Inventive spellers typically: A. write only words they are certain can be spelled correctly. B. never learn conventional spelling. C. omit consonants in words. D. progress through a series of stages. Is the answer D.?
September 16, 2014

Social Studies
Oh yeah. I read it wrong, so it's B then since none of the other answers don't make since?
September 16, 2014

Social Studies
John Locke believed that if government does not protect natural rights, then.. a) Citizens know the government is working because they have safety. b) It breaks the social contract and people can create a new government. c) Citizens should combine the parts of the government ...
September 16, 2014

Social Studies
I wasn't sure if I was right or not, so thanks! :-)
September 16, 2014

Social Studies
C?
September 16, 2014

Social Studies
Imagine your local police arrest a person suspected of robbing many homes and stored. This is an example of how government.. a) abues the power citizens give to it. b) makes laws throught representatives. c) fulfills its promise in the social contract. d) operates by the rule ...
September 16, 2014

statistics
5. A soft drink dispensing machine uses paper cups that hold a maximum of 12 ounces. The machine is set to dispense a mean of 10 ounces of the drink. The amount that is actually dispensed varies. It is normally distributed with a standard deviation of one ounce. (a) What ...
September 15, 2014

Social Studies
What did John Locke primarily write about?
September 15, 2014

Science
Which of the following is the longest divison of the geologic time? a) Period b) Epoch c) Era d) Year I have already looked in my book, I cant figure it out. Can somebody help me?
September 15, 2014

Science
Where did scientist get information to develop the geologic time scale? a) They collected and studied rock samples in Africa. b) They studied rock layers and index fossils around the world. c) They conducted research at libaries. d) They didn't have any information; they ...
September 15, 2014

Science
The geologic time scale originally ordered earth's rocks by? a) Absolute age. b) Relative age. c) Composition. d) Decades and centuries.
September 15, 2014

Physics
An airplane with a speed of 85.4 m/s is climbing upward at an angle of 37.6 ° with respect to the horizontal. When the plane's altitude is 520 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...
September 14, 2014

Physics
You are driving a 2530.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a ...
September 13, 2014

Chemicals of Life/Chemistry
Which weighs more: a liter of water at 20 degrees C or a liter of water at 80 degrees C. Explain.
September 12, 2014

computer science
Using visual logic build a program that asks the user for a whole number, N<100, determine how many quarters, dimes, nickels, and pennies make up N cents with the least amount of coins
September 12, 2014

English-Language
Please help and correct! 1. Use "in the garage" as an adjective phrase The card in the garage is for you 2. Use "for our English class" as an adverb phrase The paper is due tomorrow for our English class. 3. Use "from an encyclopedia" as an ...
September 9, 2014

maths literacy
a circular maize field has a radious of 200m.what is the length of the fence around this field?
September 9, 2014

Physics
Vector A has a magnitude of 13.0 units and points due west. Vector B points due north. (a) what is the magnitude of B if A+B has a magnitude of 16.8 units? (b) What is the direction of A+B relative to due west? (c) What is the magnitude of B if A-B has a magnitude of 16.8 ...
September 8, 2014

WOLRD GEOGRAPHY
9. Australian vegetation is dominated by various species of acacia and A. cacti. B. marsupials. C. ores. D. eucalyptus. Student Answer: B Answer: Incorrect Reference: 10. According to the World Health Organization (WHO), AIDS is listed as the _______ main cause of global ...
September 8, 2014

WORLD GEOGRAPHY
9. Australian vegetation is dominated by various species of acacia and A. cacti. B. marsupials. C. ores. D. eucalyptus. 10. According to the World Health Organization (WHO), AIDS is listed as the _______ main cause of global deaths. A. eighth B. fourth C. third D. second 11. ...
September 7, 2014

INTEGRAL CALCULUS PLEASE HELP!!!
If F(x)dx=1 from 1 to 25, F(x)dx=4 from 1 to 4, and F(x)dx=9 from 17 to 25, then: 1) What does F(x)dx from 9 to 17=? 2) What does (1F(x)-4)dx from 9 to 17x=? I have no idea how to do this problem and have been on it for hours! The problem is not typed incorrectly, this is ...
September 5, 2014

Chemistry
Draw the isomers for C2h2 Is this correct? CH3-CH=CH-CH3 There's only one possible isomer.
September 5, 2014

Chemistry
If I count out Avogadro's number if CO2 molecules how much will my piles of molecules weigh? Can someone show me how to get the answer. I know the answer is 44g
September 4, 2014

physics
a pitched ball is hit by a batter at a 45 degree angle and it just clears the outfield fence, 110m away. If the fence is at the same height as the pitch, find the velocity of the ball when it left the bat. Ignore air resistance.
September 4, 2014

Chemistry
Thank you so much for helping with this!! Math part if chem is not my strongest :)
September 3, 2014

Chemistry
Sorry.. What is the density (g/mL)?
September 3, 2014

Chemistry
A syrup is added to an empty container with a mass of 102.00g . When 0.133 pint of syrup is added, the total mass of the container and syrup is 196.34g . (1 qt = 2 pt)
September 3, 2014

WRITING AND COMMUNICATION
Another word for a verbal bromide is a A. conceit. B. cliché. C. seltzer. D. euphemism. PLEASE HELP ME I AM BETWEEN B and C
September 2, 2014

Writing Skills
thank you so much I appreciate it
September 1, 2014

Writing Skills
5.A 10.A 19.A please check it
September 1, 2014

Writing Skills
please check it
September 1, 2014

Writing Skills
1.C 3.A 5.C 6.A 10.D 12.B 15.D 19.C
September 1, 2014

Writing Skills
1. What do we call an idea that will make the reader take notice and want to read on? A. Card B. Summary C. Hook D. Point of view Student Answer: B Answer: Incorrect Reference: 3. The most important difference between an outline and finished writing is the A. details. B. ...
September 1, 2014

physics
Suppose a 69-kg boy and a 42-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
August 30, 2014

math
A flagpole is supported by a wire that is 5m long. The wire is pegged 2.5m from the foot of the pole. Find the height of the pole
August 23, 2014

Geometry
a carpender is cutting a wooden dowl that is 72 cm long. she wants to cut it into 2 pieces so the 1 piece is 5 times as long as the other. what are the lengths of the 2 pieces?
August 18, 2014

eng 130
Which statement best illustrate a logical tautology
August 18, 2014

Math- urgent
A golf ball can travel 170 mph. This is 10/7 times the fastest speed recorded for a hockey puck. What is the record speed for a hockey puck? Make and equation and solve.
August 6, 2014

Biology
5’-CGCACCTGTGTTGATCACCTAGCCGATCCACGGTGGATCCAAGGC-3’ ||||||||||||||||||||||||||||||||||||||||||||| 3’-GCGTGGACACAACTAGTGGATCGGCTAGGTGCCACCTAGGTTCCG-5’ Tip: If you want to see a review of PCR, we recommend this amazing animation and virtual lab made by the ...
August 4, 2014

public speaking
1. “To persuade my audience that drinking and driving laws should be stricter” aims for: A. passive agreement with a policy. B. active agreement with a policy. C. personal action to support a policy. D. personal agreement to support a policy.
July 29, 2014

public speaking
2. “To persuade my classmates that cheating in an exam is just as wrong as plagiarism” is a: A. question of fact. B. question of policy. C. question of value. D. question of guessing.
July 29, 2014

calc 2
sum ((√(n-1))-(√(n-1)))/n, as n=1
July 27, 2014

calculus 2
r=1- 3Sin theta¸ find the area enclosed by the inner loop
July 26, 2014

calculus 2
Evaluate integral x/(1+|x|), (x,-3,3)
July 26, 2014

calculus 2
find dy/dx and (d^2)y/(d^2)x for x=2sint y=3cost 0<1<2pi
July 26, 2014

calculus 2
aprox 10.2688 thank you so much
July 26, 2014

calculus 2
y = ∛x for 1 is less then or equal to x and x is less then 6
July 26, 2014

calculus 2
use the simpsons rule with n=10, arc length y=^3√x, for 1<=x<6
July 26, 2014

physics
A single circular loop of wire of radius r = 2.5cm rotates at a frequency of 60 Hz in a constant magnetic field of magnitude B = 1.8 T. Use this to design a generator that produces an induced emf of 430 V. Hint: You must choose values for the number of loops and the area of ...
July 17, 2014

algebra
at a restaurant brandy paid twice as much as Katie and Katie paid $3 more than Stephanie if the total combined amount they paid was $56 how much did Katie pay
July 14, 2014

Finite Math
A political scientist has received a grant to fund a research project involving voting trends. The budget of the grant includes $3200 for conducting door-to-door interviews the day before an election. Undergraduate students, graduate students, and faculty members will be hired...
July 4, 2014

Chemistry 1
In the spectrum of a specific element, there is a line with a wavelength of 486 nm. Use the Rydberg equation to calculate the value of n for the higher energy Bohr orbit involved in the emission of this light. Assume the value for the lower energy orbit equals 2.
July 1, 2014

Chemistry 1
A dilute solution of hydrochloric acid with a mass of 614.86 g and containing 0.33004 mol of HCl was exactly neutralized in a calorimeter by the sodium hydroxide in 619.41 g of a comparably dilute solution. The temperature increased from 15.529 to 19.691°C. The specific ...
July 1, 2014

Integral question
1) find the integral from 1to -1 if(5sinx-2tanx+3x^5)dx 2) find the integral of x^3/(x^4+1)dx
June 26, 2014

Derivatives
Find the derivative of xsecy+y^5=5x^3-7
June 26, 2014

Calc please help
Find the derivative of f(x) (csc(2x^2+1)^4
June 26, 2014

Calc please help
That is where I am confused ...
June 26, 2014

Calc please help
Limit as x approaches zero (1/x-1/tanx)
June 26, 2014

Chemistry
I need to calculate the mass of CO2 produced in the reaction of NaHCO3 + HCl Data Mass of NaHCO3 = .05g Mass of system before reaction 117.9 g Mass of system after reaction 117l98 Maxium pressure 1.4094 initial pressure 1.0094 pressure change .4 temp 299.2K
June 24, 2014

Stats
The following data represent the number of live births in the United States in 2007 for women 15 to 49 years old. Age Live Births 15 - 19 445,045 20 - 24 1,082,837 25 - 29 1,208,405 30 - 34 962,179 35 - 39 499,916 40 - 44 105,071 45 - 49 7,349 Find the following: 1. What is ...
June 16, 2014

Math
Assume that you are drawing two balls without replacement from an urn that contains 13 green balls, 10 blue balls, and 1 red ball. What is the probability that you will draw a blue balls and a red ball?
June 12, 2014

Math please help
Find the smallest value on function (3/x)+(4/1-x) on interval (0,1)
June 12, 2014

Math please help!
Find lim as x approaches 0 of (e^x-1-x/2-x^3/6)/(x4)
June 12, 2014

math
?? but the ans is 0, 72 ,144,216,288,360 degree
June 12, 2014

math
Solve the equation cos3x=cos2x for 0¡Üx¡Ü360
June 12, 2014

Math please help!!
Find the derivative of (2^x-e^x)/(2^x+e^x)
June 11, 2014

Math help!
Find derivative using logarithmic differentiation F(x)= secx^cotx
June 11, 2014

Math help!
Find the derivative of tan(ln(5x))
June 11, 2014

Math help!
Find the derivative. F(x)=x^4+x^2+1/(x^2+1)
June 11, 2014

math please help!
Find the derivative if f(x)= e^-3x times sin(4x) use the product rule.
June 11, 2014

Math- urgent
Thank you!
June 10, 2014

Math- urgent
How do you find the sine, cosine, and tangent of a triangle?
June 10, 2014

Microeconomics
How do costs play into your everyday life? For example, why might it be cheaper to drive on a toll-road vs. a free-access interstate? Also, can you identify situations where you may fall victim to the sunk cost fallacy (we all do)?
June 10, 2014

trig
A weight attached to a long spring is bouncing up and down. As it bounces, its distance from the floor varies periodically with time. You start a stopwatch. When the stopwatch reads 0.3 seconds, the weight reaches its first high point 65 cm above the ground. The next low point...
June 9, 2014

civics
WOW im dumb today it must be C?
June 4, 2014

civics
How is the direct democracy similar to a representative democracy ? A. both types of government are run by a communist party. B.Both types of democracy give power to the elected representative. c.Both types of democracy give power to the elected representative. D. both types ...
June 4, 2014

algebra
X^9/x^2 H^14/h^5
June 2, 2014

history
wow i know what Writeacher said but she is accusing me of being some one else if you don't see in the comment
May 29, 2014

history
im just here to get some help
May 29, 2014

history
wait you cant acuss me of being someone that im not
May 29, 2014

history
no i dont know who that is
May 29, 2014

history
i dont know my teacher didnt send me one
May 29, 2014

history
hi i new to this and i need help with some world history questions and i don't have a book and I've already researched it and i did not find nothing. The conquest of new lands allowed Romans to A. increase the number of Roman citizens. B. decrease the number of slaves ...
May 29, 2014

composition
an animal i wanted for pet
May 26, 2014

Algebra
Find the coordinates of the image after a reflection in the given line. [-8, 1, -7] [-7, -5, 1]; y axis I am really bad with these types (matrices) of questions, please help me.
May 26, 2014

physics
An Angry Bird sits on a clothes line midway between the two poles. bird on line If the combined weight of the bird and rope is W, what is the tension in the rope in terms of θ and W? Select one: a. W cosθ / sinθ b. W tanθ c. W/(2sinθ) d. W/(2cosθ)
May 26, 2014

physics
An aircraft has an initial mass of m0 and an initial acceleration of a0. After flying for 2 hours, the mass of the aircraft has decreased by 11%, due to the burning of the fuel. If the propulsive force provided by the engines is constant, what is the expression for the new ...
May 26, 2014

college physics
A car travels around a bend of radius R at a speed v1, experiencing a centripetal acceleration ac. The car then travels around a curve with the same radius R, but with a centripetal acceleration which has twice the magnitude of ac. What speed is the car moving, when going ...
May 25, 2014

English
Thank you, Ms. Sue. :-)
May 25, 2014

English
Read the following lines from "An Arab Shepherd Is Searching for His Goat on Mount Zion." Searching for a goat or a son has always been in the beginning of a new religion in these mountains Which of the following sentences best explains the meaning of these lines? ...
May 25, 2014

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