Tuesday
September 23, 2014

Posts by emily


Total # Posts: 2,310

math
5464
October 11, 2011

Statistics
Each year, thousands of college seniors take the Graduate Record Examination (GRE). Assume the scores are transformed so they have a mean of 600 and a standard deviation of 150. Furthermore, the scores are known to be normally distributed. Determine the percentage of students ...
October 8, 2011

Physics
Estimate the force a person must exert on a string attached to a 0.160 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.80 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of ...
October 6, 2011

physics
During a basketball game, a player flies above the basket and drops the ball in from a height of 10 meters. If the ball takes 4.4 seconds to fall, find the acceleration due to gravity.
October 3, 2011

Physics
A dog team driven by an Inuit hunter pulls two toboggans (Figure 1.49). The dog team can apply a maximum force of 700 N. Each toboggan experiences a constant frictional force of 100 N. a) Determine the acceleration of the two toboggans, if each has a mass of 300 kg. b) What is...
October 2, 2011

Chemistry
Sam Student calibrates a flask with water at 20C. Patricia Pupil borrows the flask and Sam's calculated volume for the flask, and uses it to do her unknown at 25 C. What, if any specific effect will this have on the results of Patricia's density determination? Explain ...
September 27, 2011

Is this write or wrong?
Yes, B is the right answer.
September 27, 2011

physics
A rocket-driven sled running on a straight, level track has been used to study the physiological effects of large accelerations on astronauts. One such sled can attain a speed of 440 m/s in 1.9 s starting from rest. What is the acceleration of the sled, assuming it is ...
September 25, 2011

physics
suppose that all the people of the earth went to the north pole and on a signal all jump straight up. estimate the recoil speed of the earth. the mass of the earth is 6 x 10^24 kg and there are about 6 billion people(6 x 10^9).
September 25, 2011

math HELP!!
You use compatible numbers .
September 20, 2011

math HELP!!
U would do 60,000 divided by 50 because 60,000 is close to 56,225 and 48 is close to 50
September 20, 2011

math HELP!!
U would do 60,000 divided by 50 and u would get 1,200 so the answer would be C!
September 20, 2011

statistics
compute the percentile rank of the raw score 8 in the following distribution 8,5,6,9,3,5
September 19, 2011

economics
Do you think lotteries have both micro and macro economic effects or only micro? How do lotteries change what and for whom goods and services are produced?
September 18, 2011

physics
A bus that is traveling at 35.0 km/h, speeds up at a constant rate of 3.4 m/s2. What velocity does it reach 6.8 s later?
September 18, 2011

math
Man 6 feet tall cast shadow 15 ft long. Girl is 5 ft. 10 inches how long will her shadow be
September 12, 2011

math
simplify: -8+c+(-10) simplify: -12-w+20 simplify: -3(2y-9)+y
September 12, 2011

algebra 1
45
September 7, 2011

algebra 1
Suppose you walk at the rate of 210 ft/min. You need to walk 10,000 ft. How many more minutes will it take you to finish if you have already walked 550 ft?
September 7, 2011

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. )
September 4, 2011

Math
My sister learned simplifying fractions and long division
September 4, 2011

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 ...
September 4, 2011

chemistry
Calculate the amount of heat required to heat a 42kg sample of ethanol from 14.0C to 18.0C
September 4, 2011

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...
August 30, 2011

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.
August 30, 2011

English
In Into Thin Air by Jon Krakauer, what are some examples of allusions to Shakespeare, the Bible, fairy tales, or Greek myths?
August 27, 2011

statistics
Find the first arithmetic mean between 100 and 135 given the following sequence: ..., 100, ___, ___, ___, ___, 135, ...
August 25, 2011

American Government
what do you think are some possible contemporary effects of persistent discrimination against ethnic and racial minorities?
August 24, 2011

pre calculus
how do i solve this problem: Draw the angle in quadrant I whose terminal side is on y+4x
August 24, 2011

math
6+5+4+3+2+1=21 blocks
August 24, 2011

math
n=312 evaluate the expression n+(-5) for each (n)
August 11, 2011

statistics
did you find the answers?
August 7, 2011

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.
August 2, 2011

Economics
What are the roles of Hayek and Keynes' theories in the economy right now?
July 29, 2011

economics
What are some ways that the lack of development in the world affects us?
July 27, 2011

economics
Thanks for your opinion.
July 27, 2011

economics
Higher than it is now. Other countries don't have the development that America does.. should this be a priority to rich countries?
July 27, 2011

economics
Should development around the world be a higher priority to the rich countries?
July 27, 2011

Economics...free trade
thanks
July 19, 2011

Economics...free trade
Are the benefits of free trade worth the losses for some?
July 19, 2011

Economis
What is the role of economic theory in the way economies are run today?
July 16, 2011

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...
July 16, 2011

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
July 16, 2011

psychology
I understand that portion but are you not to show the results on your research.Outcome of both? What my conclusion is?
July 16, 2011

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
July 16, 2011

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 ...
July 16, 2011

math-algebra 1
Find the 6th term of the geometric sequence whose common ratio is 1/3 and whose first term is 7.
July 14, 2011

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
July 10, 2011

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 ...
July 9, 2011

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 ...
July 9, 2011

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)
July 7, 2011

math
4(-2/3 + 4/3)
June 27, 2011

Chemistry
Calculate the concentrations of each of the ions in 0.25 M Fe(NO3)2. a) [Fe2+], M b) [NO3-], M
June 27, 2011

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)
June 27, 2011

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 ...
June 27, 2011

Chemistry
Write equations for the dissociation of the following in water. Include physical states for all species. CaCl2 (NH4)2SO4 NaC2H3O2
June 27, 2011

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?
June 24, 2011

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
June 14, 2011

global history
It's definitely C
May 31, 2011

Chemistry
Now I get it, thank you so much!
May 25, 2011

Chemistry
how do you calculate the quantity of heat gained or lost? 0.60 mol of steam condenses at 100°C
May 25, 2011

Chemistry
how do you calculate the quantity of heat gained or lost?
May 25, 2011

Chemistry
0.60 mol of steam condenses at 100°C
May 25, 2011

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
May 25, 2011

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?
May 24, 2011

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.
May 23, 2011

Pre-Calc
Can you someone please help me with this question??? Simplify cot(x + pi)
May 22, 2011

Physics
Sorry y1=3cos[2pie*t/T + pie] and y2=1cos[2pie*t/T + 2pie]
May 18, 2011

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 ...
May 18, 2011

Spanish-Please check
Thank you
May 15, 2011

Spanish-Sorry I forgot the 'La"Please check
I coem from the library. Yo vengo de la biblioteca. I forgot the "la"
May 15, 2011

Spanish-Please check
Please check-Thank you I come from the library. Yo vengo de biblioteca.
May 15, 2011

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 ...
May 15, 2011

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 ...
May 15, 2011

Spanish 8th gradePlease check
Thank you
May 15, 2011

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.
May 15, 2011

Biology
thanks
May 13, 2011

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...
May 13, 2011

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.
May 11, 2011

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.
May 11, 2011

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?
May 10, 2011

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
May 5, 2011

chem
C6H6O6-2
May 5, 2011

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...
May 3, 2011

Chemistry
Determine the number of moles in 56 g of N2
May 3, 2011

Chemistry
How many moles of SiO2 will contain 48 g of oxygen?
May 1, 2011

algebra
If 1/8 = 12 1/2% what percent does 3/8 equal?
April 27, 2011

identities trig?
find all solutions to the equation in the interval [0,2pie] cos2x=cosx
April 26, 2011

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
April 26, 2011

math
17
April 26, 2011

math
How do you write twenty million, five hundred thousand in expanded notation using exponents.
April 25, 2011

Physics - Please Help
Thank You so much Bob Pursley!!
April 25, 2011

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...
April 25, 2011

Psychology
Thanks :)
April 24, 2011

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...
April 24, 2011

Physics (please help!!!!)
This might help: w w w . khanacademy . o r g / # physics I LOVE this site.
April 24, 2011

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" ...
April 23, 2011

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 ...
April 21, 2011

grammar
I am diagraming sentences... what would a year be? He lived in the white house until 1945? HELP! I got everything else... Thanks.
April 20, 2011

math
is 17 14 and 6 measurements of a right triangle?
April 19, 2011

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