Thursday
July 31, 2014

Posts by Emily


Total # Posts: 2,300

Physics
What is the velocity at the midway point of a ball able to reach a height y when thrown with an initial velocity v0? (Assume the ball is thrown upward and that up is the positive direction. Use the following as necessary: y and g. )

Math
My sister learned simplifying fractions and long division

Physics
The vertical position of a ball suspended by a rubber band is given by the equation y(t) = (3.4 m)sin(0.49 t/s − 0.40) − (0.4 m/s)t + 5.4 m. (a) What are the equations for velocity and acceleration for this ball? (Use the following as necessary: t.) (b) For what ti...

chemistry
Calculate the amount of heat required to heat a 42kg sample of ethanol from 14.0C to 18.0C

physics
A particle has a constant acceleration of a = (5.5 m/s2)i + (3.7 m/s2)j . At time t = 0, the velocity is zero and the position vector is r0 = (9.8 m)i. (a) Find the velocity and position vectors as functions of time t. (b) Find the equation of the particle's path in the xy...

physics
A particle has a constant acceleration of = (5.5 m/s2) + (3.7 m/s2) . At time t = 0, the velocity is zero and the position vector is 0 = (9.8 m). (a) Find the velocity and position vectors as functions of time t. (b) Find the equation of the particle's path in the xy plane.

English
In Into Thin Air by Jon Krakauer, what are some examples of allusions to Shakespeare, the Bible, fairy tales, or Greek myths?

statistics
Find the first arithmetic mean between 100 and 135 given the following sequence: ..., 100, ___, ___, ___, ___, 135, ...

American Government
what do you think are some possible contemporary effects of persistent discrimination against ethnic and racial minorities?

pre calculus
how do i solve this problem: Draw the angle in quadrant I whose terminal side is on y+4x

math
6+5+4+3+2+1=21 blocks

math
n=312 evaluate the expression n+(-5) for each (n)

statistics
did you find the answers?

world civ
Can you help me? Compare and contrast the empires of the Americas with those that emerged in Africa between 500 and 1500 AD. Discuss the roles played by geography, religion, trade, and politics developments in shaping societies in these regions.

Economics
What are the roles of Hayek and Keynes' theories in the economy right now?

economics
What are some ways that the lack of development in the world affects us?

economics
Thanks for your opinion.

economics
Higher than it is now. Other countries don't have the development that America does.. should this be a priority to rich countries?

economics
Should development around the world be a higher priority to the rich countries?

Economics...free trade
thanks

Economics...free trade
Are the benefits of free trade worth the losses for some?

Economis
What is the role of economic theory in the way economies are run today?

psychology
Sorry, sent in error.The question I have is I have an idea for my research on study habits. Which would be students who study alone vs. Group studies.What would be the grades on exams? and by hours of studying between self study and group studywould the grade have a difference...

psychology
so basically with what I have in mind I should research the statistics for rasmussen college students and that will give me my results

psychology
I understand that portion but are you not to show the results on your research.Outcome of both? What my conclusion is?

psychology
I wanted to base my research study example students who study alone vs.students who study in groups.What would be the difference in grades between both for their exams is my idea.I'm not sure how to get the information as far as to the outcomes based on my idea

psychology
I am haveing to prepare a research on study habits. I have the idea on how I am going to conduct.research but my question refers to numbers based on research for the college am I making those up? I ask because of course not sure if my idea I would be able to research current s...

math-algebra 1
Find the 6th term of the geometric sequence whose common ratio is 1/3 and whose first term is 7.

Physics
Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s: (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2

Algebra 1
A theater group made appearances in two countries. The hotel charges before tax in the second country were $500 lower than in the first. The tax on the hotel bill was 5.5% in the first country and 4.5%in the second. After the trip, the total tax paid on accommodation expenses ...

Algebra 1
A theater group made appearances in two countries. The hotel charges before tax in the second country were $500 lower than in the first. The tax on the hotel bill was 5.5% in the first country and 4.5%in the second. After the trip, the total tax paid on accommodation expenses ...

Art History
What are three distant characteristics by which to recognize the difference between Bronze Age Aegean, Greek, Etruscan, And Roman Art? (Especially in Sculpture)

math
4(-2/3 + 4/3)

Chemistry
Calculate the concentrations of each of the ions in 0.25 M Fe(NO3)2. a) [Fe2+], M b) [NO3-], M

Chemistry
Write a balanced net ionic equation (include physical states) for the following reaction: Fe(NO3)3(aq) + LiOH(aq) → LiNO3(aq) + Fe(OH)3(s)

Chemistry
If a solution of sodium phosphate, Na3PO4, is poured into seawater, precipitates of calcium phosphate and magnesium phosphate are formed. (Magnesium and calcium ions are among the principle ions found in seawater.) Write net ionic reactions for the reactions. Include physical ...

Chemistry
Write equations for the dissociation of the following in water. Include physical states for all species. CaCl2 (NH4)2SO4 NaC2H3O2

Math
This is hard to explain... I need to spend between $20,000 and $60,000, BUT I need to spend ALL amounts, like $1, then 2, then 3, then 4 How do I figure out how much I will spend when I'm finished?

Literature
Which one of the following lines best illustrates personification? A. The fog comes on little cat feet B. She floated graceful as a dove C. Spring is a dream unsung D. A narrow wind complains all day

global history
It's definitely C

global history
It's definitely C

Chemistry
Now I get it, thank you so much!

Chemistry
how do you calculate the quantity of heat gained or lost? 0.60 mol of steam condenses at 100°C

Chemistry
how do you calculate the quantity of heat gained or lost?

Chemistry
0.60 mol of steam condenses at 100°C

Chemistry
The specific heat of toluene, C7H8, is 1.13 J/g K. How many joules of heat are needed to raise the temperature of 30.0 g of toluene from 10.4°C to 29°C? THANK YOU

math
The inequality for the graph can be expressed as 32 ≤ r ≤ m where r is the minimum range of the scores in any of the games and m is the maximum range. What is the value of m?

Chemistry
What is the hydrogen ion concentration in a 0.15 molar solution of acetic acid in water at 25 degrees C? Acetic acid is 1.3 % dissociated.

Pre-Calc
Can you someone please help me with this question??? Simplify cot(x + pi)

Physics
Sorry y1=3cos[2pie*t/T + pie] and y2=1cos[2pie*t/T + 2pie]

Physics
Two displacement waves are added resulting in constructive interfernce and these waves have the same period T = 1.00 s are described mathematically by: y1 = (3.0 m) cos[ 2ðt/T + ð ] y2 = (1.00 m) cos[ 2ðt/T + 2ð ] (i) What is the resultant displacement at time ...

Spanish-Please check
Thank you

Spanish-Sorry I forgot the 'La"Please check
I coem from the library. Yo vengo de la biblioteca. I forgot the "la"

Spanish-Please check
Please check-Thank you I come from the library. Yo vengo de biblioteca.

Psychology
Explain how you would use your knowledge of the overjustification effect so college graduates would engage in lifelong learning or avoid job burnout on loved but low-paying careers. I know what the overjustification effect is (an external incentive like a reward, decreases a p...

health
Does this help? (from sahealthinfo) Effects of acute alcohol intoxications in South Africa * Alcohol misuse is causally implicated in a range of chronic health problems (e.g. cirrhosis of the liver). However, many of the primary effects of alcohol misuse occur from episodes o...

Spanish 8th gradePlease check
Thank you

Spanish 8th gradePlease check
Please check these for me 1.I have to clean the house. Yo tengo que limpiar la casa. 2.I am going to the library Yo voy a la biblioteca. 3.I have to clean the house. Yo tengo que limpiar la casa. 4.I hope to get good grades Yo espero que sacar buenas notas.

Biology
thanks

Biology
Name two ways in which antibodies in the blood will prevent a pathogen from making you sick. This is all I can think of: 1. An antigen in the body will bind to an antibody that was made by...

probability and statistics I NEED HELP
The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.

probability and statistics
The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.

Physics
What will be the final temperature if 1.9 x 10^2 kJ of heat is added to 0.5 kg of ice at 0 deg. C?

6th grade English
Need to pick out the subject, verb and adjective 1. I like French Dressing. Subject=I verb=like adj=french 2. Where are my old jeans? subject=jeans verb=are adj=old

chem
C6H6O6-2

Engish
Need to circle the correctword in parentheses and label adjective or adverb. 1. Cats can see (good,well) in the dark. ANSWER=well,adverb 2.After the storm the pier was damaged(bad,badly). ANSWER=bad,adjective 3. I was (real,really) pleased to get your invitation. ANSWER=really...

Chemistry
Determine the number of moles in 56 g of N2

Chemistry
How many moles of SiO2 will contain 48 g of oxygen?

algebra
If 1/8 = 12 1/2% what percent does 3/8 equal?

identities trig?
find all solutions to the equation in the interval [0,2pie] cos2x=cosx

math
yes two negatives is a positive and no matter what when you put a negative and a positive together when MULTIPLYING it will always be a negative

math
17

math
How do you write twenty million, five hundred thousand in expanded notation using exponents.

Physics - Please Help
Thank You so much Bob Pursley!!

Physics - Please Help
A 60 year old person has a threshold of hearing of 81.0 dB for a sound with frequency f=10,000 Hz. By what factor must the intensity of a sound wave of that frequency, audible to a typical young adult, (sound level=43.0 dB) be increased so that it is heard by the older person....

Psychology
Thanks :)

Psychology
Can anyone think of another example of a Personological variable other than just personality? I'm looking at the General Aggression Model (the long term one) and it says an increase in agressive personality leads to Personological variables (e.g. aggressive personality) I&...

Physics (please help!!!!)
This might help: w w w . khanacademy . o r g / # physics I LOVE this site.

Psychology
I'm doing a presentation on Friday and I want to explain the General Aggression Model in more detail. I can't think of a way to explain "Aggressive perceptual schemata", "Aggressive expectation schemata", and "Aggressive behavior scripts" ...

Biology
I'm having trouble answering this: The average size of a large fish that humans use for food has been decreasing over time, Exp-lain how, exactly, this happens - be sure to discuss genes, proteins, traits, and selection pressure. This is all I can answer :( The large fish ...

grammar
I am diagraming sentences... what would a year be? He lived in the white house until 1945? HELP! I got everything else... Thanks.

math
is 17 14 and 6 measurements of a right triangle?

Math
If the area of a square is 36 sq. Ft., explain how you could find the perimeter.

maths
a worker dig a ditch with perpendicular sides.It is 1.05m wide at the top and at the bottom. If it is 1.80m deep and 21.6m long.How many cubic metres of earth are removed?[give your answer to 1 decimal place.]

Government
Why have the president's foreign policy powers grown despite the fact that there have been no constitutional changes since the founding? I've tried and searched various terms on Google and all I'm getting is the "crisis atmosphere of the Cold War" and the...

Math
In parallelogram DEFG m<E= 70. What is the measure of < F

Math 7th
two more than my value is 6 what does this mean??????? Please help!!!!!!!!!!!!

Physics
Does a bathroom scale measure mass or weight? If if measures mass, then how come it changes when you are on the moon?

Math
The product of two numbers is 108, and the quotient is 12. What are the two numbers.

social studies
What are a few early motions towards the abolition of slavery

English
1. Correct 2. taught 3. laid 4. laid 5. correct 6. set 7. correct 8. raised 9. correct 10. set

English
Need to correct the verb if not correct and if correct just leave. Thanks for looking at this for me... 1. King Arthur LEARNED about the magic sword from Merlin the magician. ANSWER=correct 2. My older sister LEARNED me to read when I was in kindergarten. ANSWER=taught 3. Mari...

Math
it could be 12 or 24

Math
what is the goal? to simplify? if so it would be: 12z^4-4z^3+21z-7 z^2 means z squared, z^3 z cubed, etc. i assumed that the 4z3 at the beginning was four z cubed...

geometry
The area of a parallelogram MNOP is 48 sq cm. MX, which is a line segment perpendicular to diagonal PN where X is on PN, is 3 cm. How to find the length of diagonal NP?

geometry
in a rhombus, the diagonals are perpendicular , so if you divide each diagonal in half (where they intersect) than you get a right triangle with sides 3 4 and x. Use pythagorean theorum and that side is 5. Because all sides of a rhombus are congruent, each side is 5, so the pe...

math
y(output)=5/2x + 2

Physics
How come we don't use the cosine law? In an example, they used the cosine law to find Fnet: A person of mass 70 kg is sitting on a 20 kg toboggan. If the two people are pulling her with two different ropes, find the person's acceleration. The force of person 1 is 50 N ...

Physics
Two tugboats are pulling a freighter. Find the net force and direction of the acceleration for the following cases. Assume that each tugboat pulls with a force of 1.2 x 10^5 N. Assume no resistive force at this time. a) Tugboat 1 pulls in a direction given by [N 60 degrees E] ...

Chemistry
What are the products of KOH + SO2?

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