Saturday
July 30, 2016

Posts by Erin

Total # Posts: 665

Physics
1.66 m/s^2! Thanks
October 10, 2009

Physics
Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 1.75 s and the second in 1.17 s. Find the constant acceleration of the train. I know how to find average ...
October 10, 2009

Physics
A motorist travels at a constant speed of 34.0 m/s through a school zone; exceeding the posted speed limit. A policeman, waits 7.0 s before giving chase at an acceleration of 3.9 m/s2. (a) Find the time required to catch the car, from the instant the car passes the policeman...
October 10, 2009

biology
it is everything that occupies a place in the space
October 6, 2009

Social Studies
how did geography affect the development of African kingdomes?
October 5, 2009

Physics
5.03 m/s^2
October 5, 2009

Physics
14.84 m/s^2
October 5, 2009

biology
mitochondria-hydraulic dam ribosomes-small shops nucleus-town hall endoplasmic reticulum-special carts golgi apparatus- post office protein-widget cell membrane-fence lysosomes-scrap yard nucleolus-carpenter's union
October 4, 2009

Math- calculus
Given f(x) = x ^ 3 - x ^ 2 -4x +4 Find the zeros of f. Write an equation of the line tangent to the graph of f at x = -1 The point (a,b) is on the graph of f and the line tangent to the graph at (a,b) passes through the point (0,-8) which is not of the graph of f. Find a and b...
September 25, 2009

college physics
Two small spheres, each with mass m=3g and charge q, are suspended from a point by threads of length L=0.22m. What is the charge on each sphere if the threads make an angle theta of 15 degrees with the vertical?
September 17, 2009

college physics
There are four charges, each with a magnitude of 2.0uC. Two are postive and two are negative. The charges are fixed to the corners of a 3.0m square, one to each corner, in such a way that the net force on any charge is directed toward the center of the square. Find the ...
September 17, 2009

college physics
Two small spheres, each with mass m=3g and charge q, are suspended from a point by threads of length L=0.22m. What is the charge on each sphere if the threads make an angle theta of 15 degrees with the vertical?
September 17, 2009

Math
Guess my rule? Write a funtion for the function. Input 6 7 8 9 Output 5 5.5 6 6.5
August 24, 2009

Global
Explain how the African European and the Native American cultures blended to form a latin american culture?
May 7, 2009

English
I am having trouble writing a topical outline and expanding it to a sentence for this paper: Marie Curie is best known as the discoverer of the radioactive elements polonium and radium, and is the first person to earn the honor of two Nobel prizes. Her work not only influenced...
May 3, 2009

Math
Thank you Ms. Sue!
April 29, 2009

Math
Your not dividing IN half, but BY half. I did it the way of using fractions. Because half is .5 or 1/2. I have no idea how he got 12 either!
April 29, 2009

Math
Divide 30 by half and add 10. What do you get? I think it is 70, but my friend disagrees. He thinks it's 12.
April 29, 2009

math
But how did you figure it out like that.
April 27, 2009

math
There is a circle that is cut in three slices one slice is (in fractions) 1/3 and one slice is 1/5. What fraction is the other slice. (it is a whole circle.) Can you please tell me how to I can figure this out on my own.
April 27, 2009

Pre Algebra
(h4) 4 (-6x7) (-9x12) the answer is -63x 19
April 2, 2009

Reading
Jake was new to Fair Ridge Elementary, and he was big. Jake bullied Tommy when his jeans jacket was too small for him. It stretched tight across his back and the sleeves were too short for his arms. And, Jake is taking his things from the other students. But now Jake and Tommy...
March 30, 2009

Reading
Secret Pal Surprises Characters and Setting? It is for my book report. Please tell me the characters (behavioral description) and where's the setting.
March 30, 2009

Eng 102
How can I support my thesis with compelling arguments and counterarguments? Here is my thesis statement? Although many coal industries argue that mountaintop removal coal mining is more cost effective than underground coal mining, MTR is destroying the beautiful mountains and ...
March 25, 2009

Algebra
y3-2y2- + 3y-4 for y+5 (-9) (-9) (-9) m.m.m 7.a.a.b.b.b
March 24, 2009

9th grade Pre Algebra
y3-2y2- + 3y-4 for y+5
March 24, 2009

9th grade Pre Algebra
I need help with exponents -n6 for n=2
March 23, 2009

9th Pre Algebra
I need help with exponents -n6 for n=2
March 23, 2009

Reading
How many hours 150 minutes for reading log? for times with reading log
March 21, 2009

math
thank you!
March 14, 2009

math
You must be at least 48 inches tall to ride an amusement park ride, and your little sister is 30 inches tall. How many inches/must she grow before she may ride the ride? You need no more than 3,000 calories in a day. You consumed 840 calories at breakfast and 1,150 calories at...
March 14, 2009

Wilders Preparatory
What are the modifiers for the word flexible?
March 6, 2009

biology repost
Predict what would happen to a red blood cell placed in each of the following external solutions. Would it shrink, swell, or not change its volume? Explain each answer in ONE sentence. a. 150 mM NaCl b. 100 mM NaCl plus 50 mM albumin
March 6, 2009

biology
Predict what would happen to a red blood cell placed in each of the following external solutions. Would it shrink, swell, or not change its volume? Explain each answer in ONE sentence. a. 150 mM NaCl b. 100 mM NaCl plus 50 mM albumin
March 6, 2009

biology
Predict what would happen to a red blood cell placed in each of the following external solutions. Would it shrink, swell, or not change its volume? Explain each answer in ONE sentence. a. 150 mM NaCl b. 100 mM NaCl plus 50 mM albumin
March 6, 2009

Writing
no.
March 4, 2009

Writing
Do you have any connections with the myth you chose? Lack of connectionss? Discuss (write) about your connections.
March 4, 2009

Writing
Myth Literature Response Questions about Pandora's Box? I need help?!? What happended in the story? (Write is the plot?) Write a summary with rising action, climax and resolution.
March 4, 2009

Writing
Myth Literature Response Questions about Pandora's Box? I need help?!?
March 4, 2009

chem post
what are the point groups for mer- Co Cl3 (CO3) and fac- Co Cl3 (CO3)
March 4, 2009

chemistry
what are the point groups for mer- Co Cl3 (CO3) and fac- Co Cl3 (CO3)
March 4, 2009

chem
what are the point groups for mer- Co Cl3 (CO3) and fac- Co Cl3 (CO3)
February 26, 2009

Math
are you good with times? I am struggling with studying with times so help me: The first walker to finish the 12 miles crossed the finish line 3 hours after the offical starting time of 10:00 a.m. At what time did the first walker finish? The judges left the finish line at 5:30...
February 25, 2009

chemistry
what are the symmetry elements for: cis-CoCl2(NH3)4 and trans-CoCl2(NH3)4 would it be C2 S2?
February 25, 2009

Choosing High School Courses
Good choice is to choose high school easy: Algebra 1, PE, and home ec (cooking class) or etc.... English is the best for writing strategy, and reading is kind of good.
February 23, 2009

chem please
yes. the solubility of KNO3(s) at 0.0 degree celsius is 15g KNO3/100g H2O. Also, A 320g sample of a saturated solution of KNO3(s) in water is prepared at 25.0 degree celsius (this is part of the info given). i don't know how to solve this.
February 1, 2009

chem please
If 60 g water is evaporated from the solution at the same time as the temperature is reduced from 25.0 to 0.0 degree celsius, what mass of KNO3(s) will recrystallize?
February 1, 2009

chemistry: again
What is the predominant type of intermolecular force in I2 (iodine)?
February 1, 2009

Chemistry: help please
What is the millimolar solubility of oxygen gas,O2, in water at 20 degree celsius, if the pressure of oxygen is 1.00atm?
February 1, 2009

science please!
Estimate the value of the cell potential for the following rxn: Mn02(s) + 4H30+(pH=3.8) + 2Ag(s) --> Mn2+(aq, .1M) + 6H20(l) I got Ecell=.48V delta G circle= -92640 J/mol and delta g = -107484 is this correct?
January 20, 2009

science
how does the life cycle of hatena compare to the origin of eukaryotic cells as noted in Margulis’ Endosymbiotic Theory? something about how one life form engulfs another and incorporates it, evolving until it becomes dependent on it and has created an entirely new life ...
January 20, 2009

biology
how does the life cycle of hatena compare to the origin of eukaryotic cells as noted in Margulis’ Endosymbiotic Theory? something about how one life form engulfs another and incorporates it, evolving until it becomes dependent on it and has created an entirely new life form?
January 19, 2009

bio
how does the life cycle of hatena compare to the origin of eukaryotic cells as noted in Margulis’ Endosymbiotic Theory? something about how one life form engulfs another and incorporates it, evolving until it becomes dependent on it and has created an entirely new life ...
January 19, 2009

chemistry
an electrochemical cell uses Al and Al+3 in one compartment and Ag and Ag+ in the other write a balanced equation for the rxn that will occur spontaneously in this cell would that just be Al + Al+3 + 2e --> Ag + Ag+ ?
January 18, 2009

Algebra II- please help!
Thank you, Reiny. My teacher taught me something very similar to your method and now I understand it. Thank you for your help! : )
December 10, 2008

Algebra II- please help!
Thank you so much, Damon! You really helped me out! : )
December 10, 2008

Algebra II- please help!
I just cannot seem to be able to grasp the concept of solving polynomial inequalities. Can someone please explain, step by step, how to solve them? Here's a problem I can't solve. Please use this as an example: (x-2)(x-5)<0 I cannot thank you enough for helping me ...
December 10, 2008

biology
what are the three parts of the cell theory?
November 25, 2008

science
what are the four properties that can be used to classify elements?
November 12, 2008

algebra 2
how do you solve this? -2square root7-4square root7
October 26, 2008

history HHHEEELLLPPP!!!
What is the society and environment of the coastal plains?
October 9, 2008

chemistry
what is a summary of observed behavior? maybe im thinking about it too much and its simple but im lost! HELP
October 7, 2008

history
Why did the cowboys go west?
October 7, 2008

history HHHEEELLLPPP!!!
did the railroad workers go west for job opportunities and technological advances?
October 7, 2008

history
they went west for job opportunities and for technological advances?
October 7, 2008

history
what are two reasoms why the railroad workers went west?
October 7, 2008

history HHHEEELLLPPP!!!
thankyou
October 7, 2008

history HHHEEELLLPPP!!!
Why did the miners move west? 2 reasons
October 7, 2008

calculus
Evaluate the following limit lim x^2 + 3x - 40 x-->5 ------------- 3x + 10 - x^2
September 27, 2008

science
how does yeast cause bread to rise?
September 26, 2008

chemistry
Consider the following reaction: 2HBr(g)---> H_2(g) + Br_2(g) B)In the first 15.0s of this reaction, the concentration of HBr dropped from 0.510M to 0.455M. Calculate the average rate of the reaction in this time interval. C)If the volume of the reaction vessel in part (b) ...
September 24, 2008

English-Symbolism
Need help with symbolism project. thank you for your help.? I need help with explaining symbolism of the ax from black cat. Do you know what symbolism mean is? THANK YOU FOR YOUR HELP
September 13, 2008

physics
A closed surface encloses a net charge of 0.00000210 C. What is the net electric flux through the surface?
September 12, 2008

physics
A point charge of -4.00nC is at the origin, and a second point charge of 6.00nC is on the axis at x = 0.800m . Find the magnitude and direction of the electric field at each of the following points on the axis. x_2 = 17.0cm, x_3 = 1.30m , x_4=-17.0cm
September 12, 2008

history HHHEEELLLPPP!!!
Thankyou Ms.Sue!!! It helped alot.
September 11, 2008

history HHHEEELLLPPP!!!
How did the rich Southern planters regain control in the south after the civil war?
September 11, 2008

history HHHEEELLLPPP!!!
i couldn't find it in my text book.
September 11, 2008

history HHHEEELLLPPP!!!
can you help?
September 11, 2008

history HHHEEELLLPPP!!!
yes
September 11, 2008

history HHHEEELLLPPP!!!
How did the rich southern planters regain control in the south after the civil war???
September 11, 2008

history
thankyou Ms.Sue!!!!
September 11, 2008

history
How did congress try to counteract the Jim Crow Laws?
September 11, 2008

chemistry
Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 470 torr?
September 7, 2008

chemistry
Calculate the amount of heat required to completely sublime 24.0 g of solid dry ice CO_2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
September 7, 2008

physics
what does E mean? Could you explain it another way because I'm confused.
September 5, 2008

physics
I tried that and got 1.8x10^8 but it wasn't the right answer
September 5, 2008

physics
Calculate the electrical attraction that a proton in a nucleus exerts on an orbiting electron if the two particles are 1.13×10^-10 m apart.
September 5, 2008

math
Solve for w: P=2L+2W
September 1, 2008

social studies
When did the firt migrants arrive in the americans
August 27, 2008

Math
If you are writing a number sentence based on a given word problem do you include the clarrifying words or just the numbers? There are 12 students in class. If they are divided into 3 groups, how many children will be in each group?
August 11, 2008

Reseach paper
I am also doing the same paper and am having the exact same problems as the rest of you. Try this, I read and re-read the sentences in every paragraph that I did and realized that I could make two senteces out of one that I wrote to reach the six sentence requirement on each ...
June 21, 2008

Hello!
I love cyber chickens!!! Do you???
May 19, 2008

Math
bla bla bla because he has no tea bla bla bla
May 13, 2008

physics
According to one set of measurements, the tensile strength of hair is 196 MPa, which produces a maximum strain of 0.400 in the hair. The thickness of hair varies considerably, but let's use a diameter of 50.0 u(mu)m . What is the magnitude of the force giving this tensile ...
April 18, 2008

physics
If a vibrating system has total energy Eo , what will its total energy be (in terms of Eo) if you double the amplitude of vibration? If you want to triple the total energy of a vibrating system with amplitude Eo , what should its new amplitude be (in terms of Ao)?
April 18, 2008

physics
It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.20 GPa). As one goes deeper and deeper in the ocean, the pressure increases by 1.0*10^4 Pa for every meter below the surface. If a diver goes down 33.0 m (a bit over 100 ft) in the ...
April 13, 2008

physics
A thin, light string is wrapped around the rim of a 4.00kg solid uniform disk that is 30.0cm in diameter. A person pulls on the string with a constant force of 100N tangent to the disk. Find the linear acceleration of its center of mass. If the disk is replaced by a hollow ...
April 12, 2008

physics
A woman with mass 50.0kg is standing on the rim of a large disk that is rotating at 0.500rev/s about an axis perpendicular to it through its center. The disk has a mass of 110kg and a radius of 4.00m. Calculate the magnitude of the total angular momentum of the woman-plus-disk...
April 12, 2008

physics
A woman with mass 50.0kg is standing on the rim of a large disk that is rotating at 0.500rev/s about an axis perpendicular to it through its center. The disk has a mass of 110kg and a radius of 4.00m.
April 12, 2008

physics
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center. When the skater's hands and arms are brought in and wrapped around his body to execute the spin, the hands and arms can be ...
April 12, 2008

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