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December 20, 2014

Posts by abby


Total # Posts: 680

Physics
Jill of the Jungle swings on a vine 7.0 m long. What is the tension in the vine if Jill, whose mass is 65 kg, is moving at 2.3 m/s when the vine is vertical?
March 2, 2010

Physics
When you take your 1200 kg car out for a spin, you go around a corner of radius 51 m with a speed of 12 m/s. The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?
March 2, 2010

MATH
Elsie is starting a recycling club at her school and hopes to use the money earned from recycling cans to buy recycling bins for the school. Elsie first needs to figure out how much the cans that can be collected at her school will weigh, so she starts by weighing the cans in ...
March 2, 2010

math
The recycling center pays 25 cents per kg for aluminum cans. If her school recycles 2070 cans each day, how much money will Elsie earn each day by recycling?
March 2, 2010

Pre-Cal
1) My last question was wrong. The question should read: Fill in the blanks As x --> pi+, sin x --> ? and csc x --> ? I do not understand this!
February 28, 2010

Pre-Cal
Error. Im sorry the question is As x --> pi+, sin x --> ? and csc x --> ?
February 28, 2010

Pre-Cal
1) Fill in the blanks As x --> pi^2, sin x --> ? and csc x --> ? I do not understand this!
February 28, 2010

Math(Please check)
1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees. Would I use the forumula cos(pi/2 - Q) = sin Q
February 28, 2010

Math(Please check)
Error
February 28, 2010

Math(Please check)
1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees.
February 28, 2010

chemistry
What would be happening in this reaction? 2Ag^+(aq) + CO3^2-(aq) + HNO3 (aq) -----> 2AgNO3(s) + H20(l) + CO2(aq)
February 26, 2010

Pre-cal
1) Solve the equation sinx(sinx+1) = 0 I am having trouble with the first step. Could I do sin x^2 + 1 =0?
February 23, 2010

Physics
A child goes down a playground slide with an acceleration of 1.24 m/s^2. Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 32.0 degrees below the horizontal.
February 23, 2010

Physics
A farm tractor tows a 3800-kg trailer up a 19 degrees incline with a steady speed of 3.0 m/s. What force does the tractor exert on the trailer? (Ignore friction.)
February 22, 2010

Pre-Cal(Urgent!!)
Find all the solutions of the equation in the interval (0,2pip) sin(x + pi/6) - sin(x -pi/6) = 1/2 I am only stuck on the last part. I have 2sinx(sqrt3/2) = 1/2 Does the 2 cancel out with the sqrt 3/2. I am not sure what to do.
February 20, 2010

Pre-Cal
Find all the solutions of the equation in the interval (0,2pip) sin(x + pi/6) - sin(x -pi/6) = 1/2 I am only stuck on the last part. I have 2sinx(sqrt3/2) = 1/2 Does the 2 cancel out with the sqrt 3/2. I am not sure what to do.
February 20, 2010

Math
1) Find the angle of depression from the top of a lighthouse 250 feet above water level to the water line of a ship 2 miles off shore. arc tan 10560/250 = 88.64 ft Is this correct? 2) A passenger is in an airplane flying at n altitude of 10 kilometers sees two towns directly ...
February 18, 2010

Physics
A swimmer runs horizontally off a diving board with a speed of 3.14 m/s and hits the water a horizontal distance of 2.16 m from the end of the board. How high above the water was the diving board?
February 16, 2010

Physics
A cork shoots out of a champagne bottle at an angle of 39.0 degrees above the horizontal. If the cork travels a horizontal distance of 1.10 m in 1.40 s, what was its initial speed?
February 16, 2010

Physics
A soccer ball is kicked with a speed of 9.80 m/s at an angle of 25.0 degrees above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air?
February 16, 2010

Physics
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 25 m/s at an angle of 39 degrees above the horizontal. (a) How long does it take for the ball to reach the wall if it is 3.7 m away? (b) How high is the ...
February 16, 2010

Physics
In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.9 m/s at an angle of 25 degrees above the horizontal. It is released 0.75 m above the floor. What horizontal distance does the ball cover before bouncing?
February 16, 2010

Pre-Cal(Please Help)
1) For a person at rest, the velocity v (in liters per second) of air flow during a respiratory cycle is V = 0.85 sin pi(t)/ 3 where t is the time in seconds. (Inhalation occurs when v > 0 and exhalation occurs when v < 0) A) Find the time for one full respiratory cycle ...
February 12, 2010

MAth
yuhh know what im asking yuhh guys okayy! nd i know what iht is im not stupid!
February 10, 2010

MAth
what do you call a person who buys and sells bugs?
February 10, 2010

Physics
I need to solve this equation. 3E -9 N / 1.25 E -19 C I do not know what to do with the -9 and -19.
February 10, 2010

social studies
why was the Spanish-American War important to America?
February 10, 2010

social studies
Why was Theodore Roosevelt an American Hero?
February 10, 2010

science
What organ receives pancreatic juices? What organ absorbs water and what organ, in animals, helps digest cellulose?? Please help me!!
February 1, 2010

Physics
1) The question asked to find the ionosphere reading for your area today and gives you s web site. I went on the website but I have no idea how to find the reading for West Palm Beach. Any suggestions?
January 26, 2010

7th grade
2/5 of 40 What is the formula to find this????
January 11, 2010

Science
How is the pH of a strong acid compared to a weak acid of the same concentration?
January 10, 2010

math
a bank teller had $2750 in 10 dollar bills and5 dollar bills he had twice as many10 dollar billsas 5 dollar bills how many of each bill does he have
January 8, 2010

english
1. might be going 2.did give
January 8, 2010

wrighting
I have to wright a report on the erely explors and evrything i wright dous not make sence
January 7, 2010

5th grade
come up with some ideas first
January 7, 2010

science
What are the seven energy levels and tell the maximum number of electrons that can fit in each.
December 8, 2009

social
what are two actions outlawed by the english bill of rights?
December 2, 2009

social
according the the english bill of rights, how is freedom of speech protected?
December 2, 2009

History
Comparing the different diplomacy styles of Prestidents Roosevelt, Taft, & Wilson, Roosevelt beheved the U.S. should respond to foreign crises, not by threats, but by military action, thus, the "big stick" approach. Taft hoped to modifty the American foreign policy ...
November 30, 2009

History
Compare the different diplomacy styles of Presidents Roosevelt, Taft, and Wilson.
November 30, 2009

MATH
Jones Company had 100 units in beginning inventory at a total cost of $10,000.The company purchased 200 units at a total cost of $26,000. At the end of the year, Jones had 80 units in ending inventory. Compute the cost of the ending inventory and the cost of goods sold under (...
November 30, 2009

science
A 2.7 kg box is released on a horizontal surface with an initial speed of 2.9 m/s. It moves on the surface with an acceleration of .27 m/s squared. Calculate the kinetic friction force on the box. The coefficent of the kinetic force is .156.
November 24, 2009

math
Over the past two weeks, Jane earned $292 and $193 respectively, at her part time job. What must she earn in the third week to bring her three-week average earnings to $200 per week?
November 22, 2009

Science
What is it caled when... A family of unreactive elements whose atoms do not gain, lose, or share valence electron
November 19, 2009

world history
true or false if false why hindus believe that souls are born and reborn many times each time into a new body which is a process called reincarnation
November 19, 2009

history
Why were American political leaders so interested in the Pacific islands in the late 1800's?
November 16, 2009

5th grade
the gcf can not be lower than 16
November 13, 2009

chemistry
in the lab of reaction with copper copper is suppose to loose mass because it oxidates. its that right or does it gain mass thanks
November 13, 2009

chemistry
when heated in the presence of air, 80 grms. of copper completely react to form 100 grms. of copper oxide what is the mass of oxygen that has combined with the copper? how much copper must be heated to form 300 grms. of copper oxide?
November 13, 2009

math
8 m _____________ |\ | 4 m | \ Garden| | \ | | floor \ | -------------- 8m I need help finding the area of the garden and the area of the floor. so please give me in full explanation.
November 9, 2009

math
8 m _____________ |\ | 4 m | \ Garden| | \ | | floor \ | -------------- 8m I need help finding the area of the garden and the area of the floor. so please give me in full explanation.
November 9, 2009

math
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 H E W S A E D A 17 18 19 20 21 22 G A
November 5, 2009

math
ok figure 1 has one block figure 2 has 5 block and figure 3 has 9 block what would the 100th figure be
October 19, 2009

math
but what would the 100th figure be
October 19, 2009

math
ok figure 1 has one block figure 2 has 5 block and figure 3 has 9 block whats the pattern
October 19, 2009

history
how did the lives of slaves differ from those of the free in the united states
October 19, 2009

history
how did the lives of slaves differ from those of the free in the united states
October 19, 2009

s.s
what is the proclamation?
October 12, 2009

7th grade math
last weekend,alans basketball team played in a tournament. alan scored 1/5of the teams points,his friend jake scored 30% of the teams points. what fraction of the teams points were scored by alan and jake?
October 3, 2009

math
bobpursley, I am confused to the equations that you have just posted. However, this is what I figured out but I'm not if it's correct. ((25+R)-B)+3N=435
October 1, 2009

math
bobpursley, I am confused to the equations that you have just posted. However, this is what I figured out but I'm not if it's correct. ((25+R)-B)+3N=435
October 1, 2009

math
susan is buying three different colors of tiles for her kicthen floor. she is buying 25 more red tiles than beige tiles , and three times as many navy-blue tiles as beige titles. if susan buys 435 tiles altogher, how many tiles of each color does she buy?
October 1, 2009

Pre-Algebra
Is any one there??
September 15, 2009

Pre-Algebra
So where does every one go to school?
September 15, 2009

Pre-Algebra
Thank you soooo! much! this saved me like LOADS of time! and my teacher just asks "did you do your home work!" haha! oh well! :)
September 15, 2009

Science
thank you!
August 31, 2009

Science
What are some examples of chemical changes?
August 31, 2009

algebra
-60rs/204rs Simplify
July 12, 2009

math
-2
June 8, 2009

science
what is a bird in science terms
May 9, 2009

math
how would you solve for x: (e^(x)+e(-x)/2)=3
May 3, 2009

history
what factorwas the most imoprtant in improving health and medicine
April 20, 2009

Algebra 2
solve and graph the inequalities y >=xsquared y<=x squared =3
March 11, 2009

writing
i have to unscrammble this word. the letters are eihmlyebt the question that comes with it is if this sign is on my dressing room door what am i?
February 25, 2009

science
Support how a vaccine can help prevent an infectious disease. Please Help!!
February 24, 2009

Science
Support how a vaccine can help prevent an infectious disease.
February 24, 2009

math
There would be 32 because 8 pigs = 1/4 of your answer. So 8 times 4 = 32 :)
February 4, 2009

social studies
thanks!!
January 20, 2009

social studies
what is a symbol used in writing?
January 20, 2009

7th grade (General_
Ok, I really like taking random notes but my teacher hates the fact that I do. She says I need to pick a note style. What style is similar to random but has something.
January 5, 2009

Math
I need help with that too i know the answer but need the stupid work shown. So how do you show the work?
December 11, 2008

algebra
can someone please help me with this? :) paul edros's first article was published in 1932. in 2003, 1521 articles on which he had worked had already been published. on average, how many of edros's articles were published each year from 1932 and 2003?
December 1, 2008

psychology
When an individual feels that both health and illness are a product of psychological, biological, and social forces he or she believes in the - Biomedical model - Western Perspective Model - Biopsychosocial model - Scientific approach to medicine - Primary medicine perspective...
November 19, 2008

AP math how to word my answer no equations
The problem states that I have to come up with best possible predictor of a 100yr flood plan. Well I found that best projection and I have to state why. Could I say: The projection from the power trend line is a better indicator because with the probability of 0.9638 this ...
November 17, 2008

History
What was the main premise of the Federalist 15?
November 15, 2008

History
What were the pen names of the authors of the Federalist papers? Why did they go by these names?
November 15, 2008

earth science? volcanoes my thoughts
Iceland: shield, cones, stratovolcanoes, calderas Chile and Argentina: stratovolcanoes The Arabian Peninsula and the Middle East: not too sure
November 10, 2008

earth science? volcanoes
what kind of volcanoes are found in Iceland? Chile and Argentina? The Arabian Peninsula and the Middle East? thanks
November 10, 2008

English/Grammer
I have a comma question! When using the phrase "as well as" do i put the comma before, after, or before AND after the phrase. An example sentince is: At the store i bought milk as well as bread.
November 8, 2008

Verbs (please answer all, don't give me a website)
im having problems with the same worksheet, on number six i got "will wear" and action verb/TRANSITIVE. i dont know if im correct. i could sure use help on these, though.
October 8, 2008

math
3/5 and 6/9 okay so 6 and 9 can be divided by 3 so 6 divided by 3 is 2 so 2 is your numerator and 9 divided by 3 is 3, so 3 is your denominator. 2/3 3/5 is already in its lowest terms. unless you did 1 and a half/2 and a half
October 6, 2008

Chemistry
Calculate the pH of: a) ammonia, 0.1M, in water b) ammonium chloride, 0.1M, in water c) a buffer solution containing ammonia (0.1M)and ammonium chloride (0.01M) For NH4^+, pKa = 9.25
September 26, 2008

math
what dose the n stand for inthe math question 54-n=24
September 23, 2008

math
what dose the n stand for in the math question 54-n=24
September 23, 2008

Algebra review
math what is the problem for the equation state what the varible n represents
September 23, 2008

social studies
what are the indivdual right of a citzen under law called
September 23, 2008

social studies
what is a word that means the same as nation goverment
September 23, 2008

social studies
where is the united states federal goverment located
September 23, 2008

reading
recast as one independent clause. Wind power for the home is a supplementary source of energy, it can be combined with electricity, gas, or solor power.
September 22, 2008

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