Saturday
July 26, 2014

Posts by emma


Total # Posts: 1,154

physics help plz
One 3.5 kg paint bucket is hanging by a massless cord from another 3.5kg paint bucket, also hanging by a massless cord, as shown in the figure . Part a) If the buckets are at rest, what is the tension in lower and higher cord ? Part b)If the two buckets are pulled upward with ...

physics- please help !
A box weighing 65.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Part a) Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley weighs 24.0 N . Part...

physics- please !
A box weighing 65.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Part a) Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley weighs 24.0 N . Part ...

physics
question : net force of 225 N accelerates a bike and rider at 2.65m/s^2. What is the mass of the bike and rider together ?

physics- please help
Question #1 A 0.140kg- baseball traveling 30.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 14.0cm . What was the magnitude of the average force applied by the ball on the glove? question #2 How much tension must a rope withstand if ...

physics- please help
World-class sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude 15m/s^2 . Part a)How much horizontal force F must a sprinter of mass 60kg exert on the starting blocks to produce this acceleration? express your an...

LA i think?
I am doing this homophone extra credit sheet and if my paper is in first i will get 50 points extra credit. I have only 3 left out of the 43. Can you please help? 1. To cut candies in small pieces 2. A just - born antelope 3. To tie a bow with one's toes The last one makes...

not for school
Hi I'm writing a story and I had a question. I am saying that one person has to jump across this... well it is kind of a pit of doom... no ending... into eternal darkness... but anyways I need to know how far the average human can jump if they have a 3ft running start. I d...

English
The Modern Drama collection theme is Opening Doors. Discuss examples of the ways in which doors and keys are used as symbols in The Miracle Worker. Make at least two references to specific details in the play to support your ideas.

math
mode is the number that shows up the most and if there's no numbers that show up at least twice then there is NO mode

math
Do 3x^2-7x+2=0 verify that the sum of the solution is -b/a and verify that the product of the solution is c/a

Organic Chemistry
calculate how much of 10% aqueous sodium carbonate would be required to neutralize the solution (This is during the preparation of benzocaine)

english
Good job! You did great :) God bless

Geom./Trig.
an airplane flies directly overhead at 540mph. 1 minute later is seen at an angle of elevation of 34 degrees. how far did the airplane fly during that time? what is the elevation of the plane?

Geography
0-19 Somewhere country 51.80 20-59 103.40 60 older 40.90 Elsewhere county 0-19 99.90 20-59 89.60 60 older 10.30 would this work better....

Geography
only my brother is home tonight and he said he could not help me.....i am supposed to write a page about his by tomorrow - my partner will be mad and disappointed that i don`t get this and i was embarrased to tell her i did not understand any of it. I missed a whole week of sc...

Geography
can you help me alter the percentages so that this makes sense..

Geography
what should my percentages be then...i am so confused on this

Geography
yes......

Geography
we were asked to compare two countries using a chart: children and youth (age 0-19) Working adults (age 20-59) and Seniors (age 60 and older) we were then asked to identify the developed and the developing countries and make predication on the following questions: education fo...

Geography
we were asked to make a chart with 2 counties called somewhere and elsewhere.....we had to identify the developed and the developing countries and make a prediction about what our country`s needs will be in ten years from the date of the population date for each of the followi...

Geography
need help predicting what should be done to prepare each of our two countries for education for young people, Infant care for young mothers, Home construction for growing families, and Medical care for seniors. Age group for each: 0-19 -25.90, 20-59 -51.70 and 60 Seniors - 20....

math-Probability
In a certain manufacturing process the probability of a type I defect is 0.21, the probability of a type II defect is 0.31, and the probability of having both types of defects is 0.01. Find the probability of having neither type of defect.

math-Probability
Let E and F be events such that the following is true. Pr (E) = 0.26, Pr (F ' ) = 0.61, Pr (E F) = 0.61 What is Pr (E ∩ F)?

Math-Probability
Michael is one of eight contestants entered in three races to be run on a eight-lane track. If in each race the runners are assigned to the lanes at random, what is the probability that Michael will be assigned to the inside lane at least once?

math-Probability
Without consultation, each of four organizations announces a one-day convention to be held during July. Find the probability that at least two organizations specify the same day for their convention.

math-Probability
In a classroom of children (10 boys and 8 girls), six students are chosen to go to the blackboard. What is the probability that no boys are chosen?

Math-Probability
An urn contains four red balls and three white balls. A sample of 2 balls is selected at random from the urn. What is the probability that at least one of the balls is red?

math-probability
A factory produces fuses, which are packaged in boxes of 17. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of these three fuses is defective. What is the probability that a box containing two defective fuses will be reject...

math-probability
Eleven white socks and six red socks are in a drawer. If two socks are selected at random, what is the probability that both socks are the same color?

Math-Probability
A law firm has six senior and fourteen junior partners. A committee of 3 partners is selected at random to represent the firm at a conference. What is the probability that at least one of the junior partners is on the committee?

Math
Determine the equation for the following: The line with x-intercept of 4 and y-intercept of 2

Math
Ok so I have this word problem that I can't figure out. Help please!! Sandra is trying to use her old cell phone to call her best friend. She can be no more than 3 miles from a tower in order to get a signal for her phone. If the telephone tower is 252 feet tall, find the ...

Physics
A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 3.3 kg weight is hanging on the string. The system of the weight and disk is released from rest. When the 3.3 kg weight is moving with a speed of 2.1 m/s, what is the kinetic energy of the enti...

Physical Science
An athlete wants to finish a 5K face in 25 minutes. If she runs at a constant speed of 3.4 m/s, will she meet her goal?

Decimal division
I would write 0.7/0.0035=200.0

Math
If you start with a number, subtract 14, then divide by 12, the result is 248. What was the original number?

math
Its closer to the 7

math
The time is 6:10 Is the hour hand closer to the 6 or 7 and why?

CHEMISTRY
Thank you! For the second question could you tell me how to find the answer?

CHEMISTRY
The following reaction represents the decomposition of hydrogen peroxide: Balanced equation: 2H2O2 -> O2 + 2H2O How many moles of oxygen are produced from the decomposition of 3.4g of hydrogen peroxide? How many molecules of O2 are produced? For the second question, is the ...

Maths
a saturated solution of salt X contain0.28g of the salt in 100cm3 of solution at 25degree centigrate, what is the solubility of the salt X at this temperature (R.m.m of X=56)

Us history
I need help writing a thesis statement for "specific problems or injustices present in American life in late 1800 and early 1900" and then the reforms that attempted to address them

math
i have 250 and my brother has 150 find the ratio of my brother money to mine

Alg 1
You have 60 megabytes of space left on your portaable media player. You can choose to download song files that use 3.5 megabytes or video files that use 8 megabytes. You want to download at least 12 files. What is a graph showing the numbers of songs and video files you can do...

alg 1
It takes a florist 3 hour and 15 minutes to make 3 small centerpieces and 3 large centerpieces. It takes 6 hours and 20 minutes to make 4 small centerpieces and 7 large centerpieces. How long does it take to make each small centerpiece and each large centerpiece? write and sol...

Alg 1
The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from the haircuts were $750. How much does the owner charge for a haircut? Solve by writing and solving a system o...

Math
How do you get 3.75 m from 3.8 m

Pre-Calc B
How do I find zeros on a graph of a cubic function? I can tell that two of the zeros are -4 and 3 because they show on the graph, but how do I find the other?

math
Loan #1 Year Amount owed 1 $3796 2 $3942 3 $4088 Loan # 2 Year Amount owed 1 $977.53 2 $1036.18 3 1098.35 For loan #1 is simple interest. Loan #2 is compound interest How much was each loan originally Determine the future value of each loan after 10 years

math
Sally invests some money at 65%/a compounded annually. After 5 years . she takes the principal and interest and reinvests it all at 7.2%/a compounded quarterly for 6 more years. At the end of this time, her investment is worth $ 14 784.56 . How much did Sally originally invest

math
Bernie deposited $ 4000 into an account that pays 45%/a compounded quarterly during the first year. The interest rate on this account is then increased by 0.2% each year. Calculate the balance in Bernie's account after three years

math
Vlad purchased some furniture for his apartment. The total cost was $ 2943.37. He paid $ 850 down and financed the rest for 18 months. At the end of the finance period .Vlad owed $ 2147.28 . What annual interest rate, compounded monthly , was he being charged ? Round your answ...

Biology
15.8 ml = how many Liters

physics
A 0.190 kg projectile is fired with a velocity of +705 m/s at a 2.00 kg wooden block that rests on a frictionless table. The velocity of the block, immediately after the projectile passes through it, is +40.0 m/s. Find the velocity with which the projectile exits from the block.

billing and coding
why is a present on admission indicator used?

billing and coding
what is a POA indicator used?

penn foster
billing and coding present-on-admission indicators

penn foster
what is a POA unducator? How and when are they used

Math
Solve for x: x^4-15X^2+14=0 How would I solve this problem? Could someone please show me the steps?

Math
Solve for x: x^4-15X^2+14=0 How would I solve this problem?

Math ( i have no clue )
Solve For P. -p+14.1-(12-4)=6.3

physics
62.2

chemistry
Liquid hexane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 3.45 g of hexane is mixed with 16.3 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be sure your answer has the...

physics
a ball of mass 0.4 kg is initially at rest on the ground. It is kicked and leaves teh kicker's foot with a speed of 5 m/s in a direction of 60 degrees above the horizontal. What is the impulse

Finance
If you were general manager of a division, on which three key ratios would you choose tohave your unit's financial performance evaluated?

word problem
if 1 is added to both numerator and denominator of a fraction, the fraction becomes 1/2. if 8 is added to both fractions, the fraction becomes 2/3. what is the fraction

word problem
the different between the digit of a two digit number is 1, the number it self is 1 more than 5 times the sum of its digits, if the unit digit is greater than the tens digit, find the number.

equations
solve the equation 3y square-XY=0 equation(1) 2X-5Y=1 eqn (2)

word problem
if 1 is added to a numerator and denominator of a fraction, the fraction becomes 1/2. 8 is added to both fractions the fraction becomes 2/3, what is the number.

word problem
the different between the digit of a two digit number is 1, the number it self is 1 more than 5 times the sum of the digits, if the unit digit is greater than the tens digit, find the number.

word problem
in a two digit number, the sum of the digit is 8. the different between this number and the number with the digit reversed is 54, what is the number.

word problem
a woman age and her son added to 45, 5 years ago the woman was 6 times as old as her son. how old was the woman when the son was born.

word problem
bisi and ada age added up to 29, 7 years ago bisi was twice as old as ada, find their present age.

Physics
Tom the cat is chasing Jerry the mouse across a table surface 1.9 m off the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.6 m/s. Where will Tom strike the floor? The ac- celeration of gravity is 9.8 m/s2 . Answer...

Physics
Tom the cat is chasing Jerry the mouse across a table surface 1.9 m off the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.6 m/s. Where will Tom strike the floor? The ac- celeration of gravity is 9.8 m/s2 . Answer...

Math
differentiate 1-cosx/1+cosx

Math
Find the instantaneous rate of change of r with respect to theta for r = (theta/2)- (1/theta).

algebra
5x46=230

algebra
5x_=230

probability
out of 250 students interviewed at a community college, 90 were taking mathematics but not computer science, 160 were taking mathematics, and 50 were taking neither mathematics nor computer science. Find the probability that a student chosen at random was a. taking just comput...

math
if you use $63.00 divided by 9 to estimate $62.59 divided by 9 is $7.00 greater than or less than the exact number? explain

chemistry1
How many mL of 0.200 M NaOH are needed to titrate 20.0 mL of 0.100 M H2SO4?

Chemistry
Thanks!

Chemistry
Well the lab is "determining Ksp for Ca(OH)2". And yes it's for titration.

Chemistry
give a formula you can use to calculate the number of moles of H+ ions used at the equivalence point.

english
please correct if the sentence into reported speech are right. 1-where do you buy your clothes? she asked me where did i buy my clothes? 2-how long have you been collecting these clothes? she asked me how long have i been collecting those clothes. 3-what will you wear at the p...

Maths
kelly is 140cm tall, that is just 4 cm short of twice as tall as her sister,how tall is her sister?

Stastics
Suppose cars arrive at Burger King's drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 pm. A random sample of 40 one-hour periods between 12:00 noon and 1:00 pm is selected and has 22.1 as the sample mean number of cars arriving. (a) Why is the sa...

general chemistry
calculate the % of Na2So4 and BaCl2.2hro in the salt solution

general chemistry
A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant.

algebra
The perimeter of a rectangular field is 312 yards. If the length of the field is 93 yards what is its width?

Algebra
Oh ok thanks.

Algebra
In Algebra terms, what does "restrict the variables" mean?

physics
A shot-putter throws the shot ( mass = 7.3 kg) with an initial speed of 15.0 m/s at a 33.0 degreCalculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 1.90 m above the ground.e angle to the horizontal.

World HIstory! hurry please
How did the civilization that arose along the banks of the nile river differ from the civilizations of the fertile crescent?

geometry
In the square, find x if segment AB = 60 cm and segment BC = 4x – 50

english
GOT NO IDEA

Chemistry! I got this answered
I don't need help for this question

Science
I think that step 2 is the catalyst which leads me to believe that it is homogeneous, am I correct?

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