Thursday
April 24, 2014

Posts by Maria


Total # Posts: 1,473

physics
yes I know. I solved with the value of elongation 0.0101 m. and I've found diameter 0.11 ! But it's wrong :( I tried many times and i always found 0.11 diameter.. I don't know where is the problem..

physics
Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·10^8 N/m2 physics - bobpursley, Saturday, October 29, 2011 at 10:32am Hookes Law: elongation=...

physics
Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·108 N/m2

PSY Quiz
Question 3 of 10 0.0/ 2.0 Points Which of the following is an effective approach for estimating heritability of a trait or behavior? D. Comparing twins to determine whether identical twins are more alike than are fraternal twins Question 9 of 10 0.0/ 2.0 Points A culture in wh...

7th grade Algebra
4w-9(6-5w)=44;w=3 decide whether the given value is a solution of the equation if not find the solution

nursing
bioterrorism and how might you prepare for its effects?

physics
An open-topped tank completely filled with water has a release valve near its bottom. The valve is 1.63 m below the water surface. Water is released from the valve to power a turbine, which generates electricity. The area of the top of the tank, AT, is a = 12.3 times the cross...

physics
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 4843 kg), which is made of steel (ρ = 7850 kg/m3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-pong balls. A ping-pon...

physics
thank you drwls !

physics
A hollow rubber ball with a diameter of 5.57 cm and a mass of 38.9 g is cut in half to make a boat (in a bathtub) for American pennies made after 1982. The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be placed in the boat w...

nursing
Because water is an essential requirement for sustaining life, why is local or international water assessment necessary to prevent disease?

physics
Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·108 N/m2.

physics
A hollow rubber ball with a diameter of 5.57 cm and a mass of 38.9 g is cut in half to make a boat (in a bathtub) for American pennies made after 1982. The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be placed in the boat w...

physics
A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m .. if needs values of these ( the speed of the wave is 58.77 m/s) (the wavelen...

Geometry
The distance between two docks on opposite sides of a river is 90 meters. The angle formed by the river bank and the line between the docks is 53°. What is the width of the river? Round your answer to the nearest meter and show your work.

Geometry
The distance across a lake is 34 meters. What is the distance, h, between the boat ramp and the dock? Round your answer to the nearest meter and show your work.

physics
(d) Wave pwer is proportional to frequency and Amplitude^2. f=6.669 Hz u=10.1 g/m A=0.169 m W=41.9 I tried with the power transmitted formula power=0.5*u*W^2*A^2*v But my solution is wrong :( I can not find a) and d) :(

physics
a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? yes x is 2.27 cm. in meter is 0.0227m !

physics
A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the s...

math
if you start from the bottom, you get 16, then 27 then 38 27 is greater than 25 and less than 35

algebra
does 6^2 + 20^2 = 21^2 ?

Alegra Beginning
ok, (2 x Tom) + Tom = 48,000 + 6,000 3 Tom = 54,000 Tom = 54,000 / 3 Can you figure out the rest?

Alegra Beginning
Rachel = (2 x Tom) - 6,000 Rachel + Tom = 48,000 so, (2 x Tom) - 6,000 + Tom = 48,000 can you solve it from here?

algebra
4 shorts will cost $ 14 x 4 , how much is left from $ 92 after that? Then divide that by $ 12 to see how many shirts Susie can buy .

algebra,math
a^2 + b^2 = c^2

MATH
wouldn't she be 5 years older 5 years from now?

MATH
Mom = 5 x (Marta) Mom = 25 so 25 = 5 x (Marta)

physics
A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the s...

physics please helpp
A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the s...

physics
A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the s...

physics
A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the s...

physics
217.7 km i found it. thankss

physics
An earthquake generates three kinds of waves: surface waves (L waves), which are the slowest and weakest; shear (S) waves, which are transverse waves and carry most of the energy; and pressure (P) waves, which are longitudinal waves and travel the fastest. The speed of P waves...

4th grade Social Studies
What are the steps of the water cycle

4 grade math
complete the following problem 4+8+7/3*72

physics
A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the s...

physics
i found it ! thankssss

physics
bobpursley 369 km is true!! thnx very much ! But if starts barking is 23.3 s ?? what is answer ?? can you calculate please !

physics
An earthquake generates three kinds of waves: surface waves (L waves), which are the slowest and weakest; shear (S) waves, which are transverse waves and carry most of the energy; and pressure (P) waves, which are longitudinal waves and travel the fastest. The speed of P waves...

physics
An earthquake generates three kinds of waves: surface waves (L waves), which are the slowest and weakest; shear (S) waves, which are transverse waves and carry most of the energy; and pressure (P) waves, which are longitudinal waves and travel the fastest. The speed of P waves...

physics
An earthquake generates three kinds of waves: surface waves (L waves), which are the slowest and weakest; shear (S) waves, which are transverse waves and carry most of the energy; and pressure (P) waves, which are longitudinal waves and travel the fastest. The speed of P waves...

physics
An earthquake generates three kinds of waves: surface waves (L waves), which are the slowest and weakest; shear (S) waves, which are transverse waves and carry most of the energy; and pressure (P) waves, which are longitudinal waves and travel the fastest. The speed of P waves...

physics
the small piston of a hydraulic press has an area of 7.0 cm squared. if the applied force is 30.0 N, find the area of the large piston to exert a pressing force of 4000 N

chemistry
i do not know how to put those in words, can some one help me, please. CoCL2(s) + 2HF(g)= CoF2(s)+ 2HCL(g) and P6( NO3)2(aq) + 2KL(aq) = PbL2(s) +2KNO3(aq)

chemistry
i do not know how to put those in words, can some one help me, please. CoCL2(s) + 2HF(g)= CoF2(s)+ 2HCL(g) and P6( NO3)2(aq) + 2KL(aq) = PbL2(s) +2KNO3(aq)

math
•Divide the top of the fraction by the bottom, •Then multiply the result by 100 and read off the answer !

Math
Let x be the width of the 1st spider web. (x/2) is the width of the 2nd spider web. (x + 3) is the legnth of the 3rd spider web. all widths add up to 18 inches.

Help With math
(3x-2)^2=2 3x-2 = sqrt2 3x= sqrt2 + 2 x = (sqrt2 + 2) / 3

5th grade math
How do you divide 836 by 22, using compatible numbers? Is there a quick way to figure out the compatibility?

5th grade math
How do you divide 836 by 22, using compatible numbers? Is there a quick way to figure out the compatibility?

Math
you're welcome. bye.

Math
yes. It helps if you show the common factor of 4: 12% = 12/100 = (3 x 4)/(25 x 4) = 3/25

Math
Express 12% as a fraction, with 100 as the denominator......Yes (12/100)

Math
you're welcome

Math
yes. If you get 19/20 in a math test then you got 95 percent.

Math
•Divide the top of the fraction by the bottom, •Then multiply the result by 100 and read off the answer !

Math
"To round numbers to the nearest thousand, make the numbers whose last three digits are 001 through 499 into the next lower number that ends in 000. For example, 6424 rounded to the nearest thousand is 6000. Numbers that have the last three digits of 500 or more should be...

Math (please help)
Whatever you do to the left side of the equation, you have to do to the right side of the equation.

Math (please help)
give me another question then.

Math (please help)
n/3 - 8 = -2 (n/3) - 8 = -2 (n/3) - 8 + 8 = -2 +8 (n/3) = 6 (n/3) x 3 = 6 x 3 n = 18

Science/ help with finding the independant variabl
Forty students participated in groups of 4-6. They were given a questionnaire to test their knowledge of the Black cultural stereotype. Subjects were asked to list the components of the stereotype. After listing the components of the stereotype, subjects completed the Modern R...

Math
124 - 6 x (0 + 15) = 34

Math
Hair grows about one 1/2 inch each month. After you shave your head how many years will it be until your hair is 1 foot in length?

Math: Calculus
I'm sorry, I still dont understand

Math: Calculus
Assume that a population size at time t is N(t) and that N(t)=40 x 2^t , t>0. Show that N(t)=40e^t ln2 Can someone please guide me step by step on this question? Im really confused. thanks. I tried to work it out, and this is what I got. N(t)= 40 x 2^t = 40 x ln 2^t = 40 x ...

algebra
37/16

math
Suppose the clerk had to stack 200 boxes of cereal in a triagle. How many boxes would be on the bottom row?

algebra 2 word problems
Yup, they're correct, but for number one they ask you to use the variable c to represent the number of cases. So I would rewrite it as 11c

Scientific Notation
I'm having some trouble solving this problem: 32x10^2 / (4x10^2)^3 Is it possible to have a negative value in scientific notation?

english
Consider the sentence "The peace accord proposed that a neutral army be deployed to act as a buffer between two sides of a dispute." Is "buffer" a correct example of "personification"? Or perhaps another rhetorical device? Thank you.

Math
How many of the 28 students in Andy's class are boys, if 4/7 are girls?

Math
Joe keeps all his socks in one drawer. He has 7 blue socks and 9 brown socks. If he reaches in the drawer without looking, what is the least number of socks he can take out to be sure of getting a pair of the same color?

Chemistry
Calculate [H3O+] and [OH-] in 0.22 M KOH(aq). This is a strong base.

physics
some university students loaded their things into a toboggan. the toboggan has a mass of 8 kg and they are pulling it with a force that is 40 degrees above horizontal. if the coefficient of friction between the toboggan and a dry patch of sidewalk is 0.7,what force is required...

Pre-calculus
The terminal side of theta lies on a given line in the specified quadrant. Find the values of the six trigonometric functions of theta by finding a point on the line. y= -3/2x in quadrant 4

Pre-calculus
The terminal side of theta lies on a given line in the specified quadrant. Find the values of the six trigonometric functions of theta by finding a point on the line. y= -3/2x in quadrant 4

Pre-calculus
The terminal side of theta lies on a given line in the specified quadrant. Find the values of the six trigonometric functions of theta by finding a point on the line. y= -3/2x in quadrant 4

Science
Describe the correlation that exists between the density of a liquid and the float height of a dowel in that liquid.

math
A high school has created a table that shows the top athletes that play both football and baseball. Find and describe the intersection of these two sets.

Math
Susan has three times as many art brushes as Monique. If they have 60 art brushes altogether, how many brushes does Susan have?

Physics
The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 1.8 m) is 305 N, and one-half wave- length occupies the wire. What is the mass of m the wire? Answer in units of kg.

math
Use compatible numbers to estimate. 212 + 347 = 83 + 34 =

Math
Use compatible numbers to estimate. 329 + 64 =

literary
What's the literary device being used in that sentence?

literary
Former Indonisean President Suharto was sometimes referred to as a puppet master

math
God Bless you all for your help

math
round 8,438 and 5,555 to the nearest hundred

math
round 929 to the nearest hundred

math
what is 7,468 rounded to the nearest hundred

Spanish-9th grade
la ardilla cafe con blanco es muy pequeña y gorda ( for animals you do not use baja or bajita only for people)Im a Spanish and English speaker, if you need more help I can help you.

world history
how can constitutions promote change or help resolve social issues?give some historical examples

statistic
This data shows the final exam scores of 10 randomly selected students and the number of hours they studied for an exam. (hours, scores) (3, 65), (5, 80), (2, 60), (8, 88), (2, 66), (4, 78), (4, 85), (5, 90), (6, 80), (3, 71) Find the equation of the regression line for the gi...

history
Who ruled over Babylon's last era of greatness

geometry
How do I find the length of the hypotenuse of a right triangle with only one leg length and all angle measurements

Physics
Does an object still possess any kinetic or potential energy at absolute zero?

English Grade 11
In George Orwell’s “Politics and the English Language” which author is Orwell referring to as “seventeenth-century Shelley”. My best guess is Mary Wollstonecraft Shelley (1797-1851) author of Frankenstein. Does that seem reasonable? Thank you.

English Grade 11
Thank you. Would Orwell's reference to the 17th century Shelley perhaps be the author of Frankenstein?

English Grade 11
In George Orwell’s “Politics and the English Language” what is the “B.B.C. Timidity”? Thank you.

math
Betsy is making a flag. She can choose three colors from red, white, blue and yellow. How many choices does Betsy have?

calculus
given: f(x)=x^4-3x^3+2x^2-7x-11 find all roots to the nearest 0.001

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