Posts by Abbey
Total # Posts: 179

Chem
The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1°C and 100.0 torr at 6.3°C. What is ?Hvap (in the unit of kJ) of chloroform? 
ASCA
Thank you Ms Sue 
ASCA
their LCM is 150 is that right? 
ASCA
Justin and Mike are learning to how to ski. Justin falls down every 30 feet. Mike falls down every 25 feet. if they start skiing from the same point , how far is the first point where they will both fall down? 
American Government
D 2 A 3 D 4 B 5 C 6 A 7 D 8 B 9 A 10 D 11 B 12 C 13 C 14 C 15 B 16 D 
Social Studies Help ASAP Please!
im pretty sure its D 
science
what do you think should be the motion of an airplane preparing for take off? 
science
how will you describe the speed of the plane from the rest until it takes off? 
Math
John's weight loss for each week of the month is 4 pounds 3.5 pounds and 2 pounds he gained 4.5 pounds the last week if John originally weighed 153 pounds how much does he weigh now 
Physics
** Answer is 1200J, but I keep getting 1176J. 
Physics
How much work is required to lift a bag of wheat (mass 50kg) to a height of 2.4m? 
Algebra
Does the data in the table represent a direction variation or an inverse variation, write an equation x 1 2 5 10 y 40 20 8 4 My answer is a direct variation, y=40x, is this correct? here are the other answers direct variation 7=1/40x inverse variat xy=40 inverse xy=1/40 
Physics
How? I don't have mass or time, and I supposed to use 2.91×10^5 kg/s? The problem also does not mention a liquid or anything so how do I know what c to use?? 
Physics
A steamelectric power plant delivers 900 MW of electric power. The surplus heat is exhausted into a river with a flow of 2.91×105 kg/s, causing a change in temperature of 1.07 oC. A. What is the efficiency of the power plant? B. What is the rate of the thermal source? ... 
Math
The sides of two similar trapezoids are in a ratio of 1:3. The area of the smaller trapezoid is 12 inches squared. Find the area of the larger trapezoid 
Science
yep 
Math
Please help me I need some help with this one 
Math
I tried uploading the graph Graph with x axis labeled years. Y axis labeled revenue in dollars. The line for printed ad revenue starts at 0, 3 and goes through the10, 2. The line for online ad revenue starts at 0, 0 zero and goes through the 10, 3. 
Math
2.A newspaper started an online version of its paper 14 years ago. In a recent presentation to stockholders, the lead marketing executive states that the revenues for online ads have more than doubled that of the revenues for printed ads since starting the online version of ... 
Trigonometry
a 5m ladder is leaning against a wall with it's top reaching a height of 4.5m. what angle does the ladder make with the wall 
Math
Could you maybe explain how you got that. 
Math
Could anyone try to explain it how they did this 
Math
find the slope of (3,4) (6, 2) 
Math
Emily receives her paycheck. She spends 1/6 on food. She spends 3/5 of remaining amount on house payment. She spends 1/3 of what is left on her other bills. She spends 1/4 of the remaining money for entertainment. This activity leaves her with $150. What was her original take ... 
Math
I need help on my math the question is make up a set of at least 12 numbers that have the following landmarks with maximum:8 range:6 mode:6 median:5 can you help me solve this equation 
Math
Thank u! I'm not very good at long division, can u help me do it step by step ? 
Math
Yay! Than what do I do ms.sue? 
Math
Question: over the last year, stormy and her 2 sisters saved money for their family trip this summer. They are now getting right to know how much they can spend on each of the 15 days of their trip. If they saved a total of $420, what is the total amount all three girls can ... 
Math
Q. Coles sleeping bag has four sides. The side with the zipper is parallel to the opposite side. None of the angles where the sides meet are right angles. The side opposite the zipper is shorter than the side with the zipper. The other two sides are the same length. What shape... 
Math
Thank you! 
Math
Q. Tim and Jorge hope they will be assigned to the same cabin at the summer camp. Each cabin has 8 beds in it. And Tim knows that he is saying in the green cabin not the red cabin. If there are 14 boys going to camp in addition to Tim and Jorge. What is the change that Tim and... 
history
im working on persuasive essays, the question is asking me to write a response showing where his essay proves to be more persuasive. Could i get some help on which points were more persuasive than others? i didn't think his speech was meant to be persuasive. 
Statistics
Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the interval from 0 to 2a (... 
child care
an appropriate sensory motor for a child up to eight month of age is A. touching toys of a different shapes, sizes and texture B. playing with puzzles with a few large pieces C. drawing with crayons or markers D. stringing large bead on a shoelace 
child care
children who attend a program that has some theoretical basis for planning have A. more material to play than those that have no theory B. more positive experience C. less marked developmental gain D. less positive experience 
child day care
large scale entry doors shouldn't be used at child care facilities because they A. appeal to adult B. are inviting to small children C. can make children feel small and less welcome D. create a welcoming environment for children and staff 
child day care
my budget allows me to buy only one software for my children ages 58. which one of the following packages would be best for this age group A. ages79 B. ages 69 C. ages 47 or ages 6 and up 
math
this was really helpful THX so much 
US History
Describe the role of the Quakers, Puritans, and Indians and how each of these groups felt about these leading nations. (By leading nations I mean the three world powers; Great Britain, France, Spain) This is only half the question. I answered the first part which is Describing... 
Chemistry(Please help)
Ok I think I understand now, thank you very much for the explanation and the website as well. It really helped!! 
Chemistry(Please help)
For a carbon atom that is sp2 hybridized, I understand that the electron configuration would be Yes, 1s2 2s1 2p3 which is a 2s up arrow,and 3 orbtials that are 2p up arrows but then since the four bonds hybridize to form four sp3 hybrid bonds how do I write this? Also for an ... 
Chemistry
Sorry, the electron config that I posted was for sp2 which I am still not sure is correct. 
Chemistry
So the C in methane would be sp3 correct? So does this mean that the electron config would be 1s orbital with an up and down arrow, 2 sp2 orbitals with 3 single up arrows, and a 2p orbital with a single up arrow? 
Chemistry
I am having trouble figuring out the electron configuration for a carbon atom when it is in a molecule such as methane. I know that the ground state configuration for carbon is 1s2 2s2 2p2 but im not sure how to figure it out when it is bonded to other atoms. Thank you for the... 
Math  Data Management
If we take a sample of 2400 families with five children, a) what is the probability that a family will have exactly 2 girls? b) How many of the families would you expect to have exactly two girls? 
Geometry
If the ratio of the areas of two similar hexagons is 4:49, find the ratio of their apothems 
Social Studies
Why did The Aquarius lose its funding from the NOAA? 
Algebra
58,584 
College Chemistry
When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. How many moles of dry air were in the bubble? (assume 1 atm) If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air at this temp? 
College Chemistry
When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. How many moles of dry air were in the bubble? (assume 1 atm) If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air at this temp? 
College Chemistry
When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. How many moles of dry air were in the bubble? (assume 1 atm) If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air at this temp? 
robert
We finally reached Enkhuizen, an ancient harbor town, where the brisk wind from the sea was blowing so hard that we had to hold on to hats, skirts, and scarves. We walked with farmers and their families to the ferry boat. The farmers were holding baskets full of chickens, ... 
Please help
Which of the following groups of words in bold is nonrestrictive and should therefore be set off with commas in the sentence My yarn WHICH IS BLUE AND GRAY will make a very pretty scarf. Hats KNITTED BY MY MOTHER are worn all winter by my family. The person WHO TAUGHT HER TO ... 
Comma help
thank you 
Comma help
Choose the option that corrects the sentence below. If the sentence is correct, select “d. The sentence is correct.” CommanderinChief Sam Houston defeated the Mexican army and captured Santa Anna in 1836 A CommanderinChief, Sam Houston, defeated the Mexican army ... 
English help
thank you 
English help
add the comma to the sentence As they studied the film they noticed some rules of science at work i wrote mine like this As they studied the film, they noticed some rules of science at work 
Math help
A pyramid has a height of 5 in. and a surface area of 90 in2. Find the surface area of a similar pyramid with a height of 10 in. Round to the nearest tenth, if necessary 
math help
ind the radius of a sphere with a surface area of 804 cm2 
math help
Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ð and round to the nearest tenth 
Science
What is convection? 
Science
Thanks!! 
Science
What units of measurement do you use to measure the earth to... 1. Moon 2. Galaxy 3. Sun 4. Communication satellite 5. Pluto 6. Proxima Centauri 
Physics
How fast must the ball rolled along the surface of a 70cm high table so that when it roll off the edge it will strike the floor at the same distance (70cm) from the point directly below the edge of the table. 
physics
A boat propelled so as to travel with a speed of 0.50m/s in still water, moves directly ( in a straight line) across the river that is 60m wide. The rivers flows with a speed of 0.30m/s. How long in a seconds does it take the boat to across the river? 
Physics
Pls sir, kindly send the solution to my email. thanks. 1)A boat propelled so as to travelled with a speed of 0.50m/s in still water, moves directly ( in straight line ) across a river that is 60m wides. The river flow with a speed of 0.30m/s. How long in seconds does it take ... 
Discrete Math
1.Using the principle of inclusionexclusion find the numbers of integers between 1 and 1000 (inclusive)that are divisible by at least one of 2,3,5,or 7? 2.A drug store sells gum, candy, and playing cards. 15 teenagers are in the store...the clerk notes after the teenagers ... 
geometry
Just flip flop the two 
word problem
26$ 
calculus
Thanks! 
calculus
Find all solutions to the equation in the interval [0,2pi) Cosxcos2x 
calculus
Cos(pi/12) solve using half angle formula 
chemistry
2.4 
trig
Okay thank you for the help on one and three. In my book for number two it says the answer is sin1/2 which is approx. 0.479. I'm not sure how that answer comes about. 
trig
solve for x in the following equations: 1) sin(arcsin x) = 1 2) 2arcsin x = 1 3) cos(arccos x) = 1/3 
marine science
Which directions do the blood and water go in a fish gill? 
science
if an objects moves 5 cm/h what is its rate expressed in cm/day 
science
over seven days, a plant grew from 12 cm to 33 express its average growth rate in cm/day 
science
if a car travels 93 km/h, what rate is it traveling in km/min 
algebra
60  (15)(2)/3 
Chemistry
To ensure equal mixing of the solution 
chemistry
Lead pipes were once used to transport drinking water and are still found in some older homes and city water systems. Suppose the lead concentration and pH of the water determined by lead (II) hydroxide (Ksp = 2.8x10^16) dissolving to produce a saturated solution. What would ... 
general chemistry
Let the fraction of Cl35 be x and that of Cl37 y. (x)(34.969)+(y)(36.966)=35.453 Since the total of x and y must equal one, substitute y=1x. Solve for x. Solve for y. Multiply each one by 100 to convert to percent. 
Chemistry
You're missing a key word in the problem. For what are you being asked to calculate? (calculate the __ of each of the following) Even without knowing the question I can tell you that answer cannot be zero if you are solving for the concentration of some species. All ... 
french
Why must one say classe de francais, for french class, and not classe francaise? How does one know when to use de in a descriptive phrase? 
PreCal
Test for symmetry with respect to Q=pi/2, the polar axis, and the pole. r=6 sinQ I know I have to replace (r,Q) with (r,piQ) (r,Q) and (r,Q) so would that be (6,pi/2)? I do not know how to find the Q. 
Math
Test for symmetry with repsect to Q=pi/2, the polar axis, and the pole. r=16cos 3Q r=16cos(3pi/3 + 3h) = 16(cos3pi/2 3h sin 3pi/2 sin h) cos 3pi/2 = 0 sin 3pi/2 = 1 Not symmetrical My teacher said that this was wrong!Why? 
Math
Use a graphing utility to graph the function. Then use the trace or table feature to identify the limit. lim 5/x2 x>2 I know I posted this question before but I am still having a hard time doing this. I pressed the y= button and typed the normal equation in: 5/x2. Is ... 
Math
Find an equation of the parabola. vertex:(1,2) focus:(1,0) (x+1)^2 = 4p(y2) (x+1)^2 = 0(y2) (x+1)^2 = (y2) Correct? 
Math
Find the vertex, focus and directrix of the parabola. 4x  y^2  2y  33 = 0 y^2+2y+1 = 4x+33+1 (y+1)^2 = 4(x+8.5) vertex:(1,8.5) focus:(2,8.5) Directrix: x=0 Is this correct? 
Math
Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = sec Q y = cos Q x^2 + y^2 = 1/cos^2 + sin^2/cos^2 = x^2(1 +sin^2) = x^2(2cos^2) x^2(21/x^2) = 2x^2  1 x^2  y^2 = 1 My teacher said to use secant*cosine = 1. ... 
Math
For the function x^2 + 2x  4 , find lim f(h+4)  f(4) / h h>0 
Math
Test for symmetry with respect to Q=pi/2 , the polar axis and the pole. r = 16 cos3Q Please explain. I do not know how to do this. Thank You!! 
Math(Please help)
Thank You!! 
Math(Please help)
Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=16t^2+50t+6 b) How long is the ball in the air... 
Math
Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=16t^2+50t+6 b) How long is the ball in the air... 
Math
Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = secQ Y = tanQ Would I use cos^2Q + sin^2Q = 1? 
Math
Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = sqrt t y = 1  t 
Math
Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = sqrt t y = 1  t 
Math
I am trying to find the standard form of this equation for an ellipse. 9x^2 + 4y^2  36x + 8y + 31 = 0 First I grouped the x and y's together. 9x^2  36x + ? + 4y^2 + 8y + ? = 31 + ? + ? Then I factored the 9 and 4. 9(x^24x+4) + 4(x^2+2x+1) = 31+36+4 9(x2)^2 + 4(x1)^...