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Posts by Matthew

Total # Posts: 698

physics
An unstable atomic nucleus of mass 17.0 ¡Ñ 10¡V27 kg which is at rest disintegrates into three particles. One of the particles, of mass 5.00 ¡Ñ 10¡V27 kg, moves in the y direction with speed 4.50 Mm/s. Another, with mass 8.40 ¡&...

algebra
a sphere has a diameter of 6x cen write an expression to represent the volume of the sphere in terms of pie

Chemistry
What is the volume of 0.129 M HCl(aq) re- quired to neutralize all of the hydroxide ions in 46 mL of 0.216 M KOH(aq)? Answer in units of mL. Answer: 77.0232 What is the molarity of Cl− ions at the stoichiometric point? Answer in units of mol/L. What is the pH of the ...

calculus
find an equation of the curve that satisfies dy/dx=4x^3y and whose y-intercept is 7

separation of variables
solving the initial value problem by separation of variables dy/dx=(4(sqrt of y)lnx))/x, y(e)=9

Geometry
The sum of the measures of the angles of a polygon with n sides is given. Find n. 32) 180 33) 1080 34) 1980 35) 2880

Math
How to change 320% into a decimal and a fraction

math
patterns and equations: x: 0,3,__,10 y: __, 8, 12,15

math
150 = 25p

History
would an Egyptian style revolution beneficial or detrimental to the US government?

geometry
Angle GHJ and Angle IHJ

math
adding fractions with unlike denominators: 7/9 + 5/6?

Geometry
Given ABCD is a square AC= BD = 4 units Ac= BD pass origin of (0,0) Find coordinates of A B C D

geometry
Given ABCD is a square AC = BD = 4 units Find coordinates of ABCD

Physical Science
Suppose you dissolve 40g of potassium nitrate in 100 cm3 of water at 100 C. If half the solution os poured out, how many grams of potassium nitrate will the remaining solution contain?

3rd grade math hw help!
explain why 2/3 is greater than9/12

math
The area of a parallelogram is 100 square millimeters. The base is 4 milimeters. Find the height.

Probability and Statistics
The number of calls that arrive under a particular time in a cell has been established to be a Poisson distribution. The average number of calls arriving in a cell in 1 millisecond is 5. What is the probability that 8 calls arrive in a cell in a given millisecond?

math
find the volume of the rectangular prism: base area 56 in2, height 6 inches

physics
For the height you can use these two formulas: t=(Vi sin A)/g H=(Vi sin A)t - (g/2)t^2

gcse biology
who discovered dna? was it friedrich miescher,francis crick and james watson or rosalind franklin???? in know someone asked the same question yesterday but im still stuck any help would be great thankyou.

9th grade algebra
a sphere has a diameter of 6x cen write an expression to represent the volume of the sphere in terms of pie

Physics 30
The activity of a sample of a radioactive isotope is 1800Bq. If this isotope has a half-life of 16 days, what is the activity after 16 days?, 24 days?, and 60 days?

differentiability
If g is a differentiable function such that g(x) is less than 0 for all real numbers x and if f prime of x equals (x2-4)*g(x), which of the following is true? A. f has a relative maximum at x=-2 and a relative minimum at x=2, B. f has a relative minimum at x=-2 and a relative ...

us history
what would teddy roosevelt put in a time capsule if needed to?

math
subtracting fractions with different denominators. Change answer to simplest form: 3/9 - 1/4

math
1/2 + 2/5 in simplest form?

6th grade
You take -5 and subtract that by 17 which you get the answer 12.

physics
200 = .5gt^2 = 6.39s

science
is there a formula i can use to determine the diameter of the ball or the percentage of size reduction? The ball has a diameter of 8.5 inches and is inflated to 7 lbs. at 0 depth

science
what happens to a soccer ball underwater at a depth of 50 feet?

Physics
A baseball catcher puts on an exhibition by catching a 0.15-kg ball dropped from a helicopter at a height of 101 m. What is the speed of the ball just before it hits the catcher's glove 1.0 m above the ground? (g = 9.8 m/s2 and ignore air resistance)

social studies
Hi I am in grade 9 social studies, and I don't understand the part of this assignment it is a ch.2 english cival war and democracy. I do want full marks on this assignment okay, or else I will get a c or an f minus.

Math
2nd grade math question. Kara's shirt has 3 more tens than ones. The value of the ones is greater than 4 and less than 6. What is the number?

Statistics
How do you construct a frequency distribution table for the indicated data set? Month Precipiation (inches) January 2.01 February 2.08 March 2.39 April 2.85 May 6.21 June 9.33 July 5.70 August 7.58 September 7.63 October 5.64 November 2.66 December 1.83

Algebra-Reiny please check
How can the LCD be 4x^2 when you have two (2x^2) as two of the denominators?

Algebra-Please help me
Could you please show me how to solvethis: x+6/4x^2 + 3/2x^2 = x + 4/2x^2 Please show me the steps-I don't even know where to start and I have 30 of these for homework Thank you

Statistics
a)One game in a state lottery requires you to pick 1 heart, 1 club, 1 diamond, and 1 spade, in that order, from the 13 cards in each suit. What is the probability of getting all four picks correct and winning $5000 b)If three of the four selections in part (a) are correct, the...

drawing
a)One game in a state lottery requires you to pick 1 heart, 1 club, 1 diamond, and 1 spade, in that order, from the 13 cards in each suit. What is the probability of getting all four picks correct and winning $5000 b)If three of the four selections in part (a) are correct, the...

English
I'm writing an essay on the short story, The Bouquet. It's a essay on the character of Mary Myrover. Tell me what you think... =D Mary Myrover is Charles W. Chesnutt's major character in the short story, "The Bouquet". She is a prideful, southern white ...

geometry
Find the value of x Show work 3x _ = x+15 2

English
Hmmm. Still cant can't think of anything. Please help ASAP. :)

English
I'm writing an essay on the short story, The Bouquet. It's a essay on the character of Mary Myrover. Tell me what you think... =D Mary Myrover is Charles W. Chesnutt's major character in the short story, "The Bouquet". She is a prideful, southern white ...

College Physics
its maximum displacement is also its Amplitude. When an object is in SHM and reaches its A, its velocity is zero.

6th grade
What are the d themes of geography ,

art
draw picture

English
What concerns does Omi and Winant’s theory of “racial formation” share with Bell Hooks’ critique of postmodernism? How might Omi and Winant’s concept address hooks’ concerns about what is lost when we reject essential identity?

algebra honors
determine whether each set of ordered pairs is a function {)(0,1),(1,-1),(5,-1),(-1,)}

Math
The graph of any quadratic function can be drawn from the vertex form of the equation, by performing 1,2,3,or 4 transformations on the graph of f(x) = x sqaured

science
what is ecrfenine unscrambled

Physics
y = .5gt^2 160 = .5gt^2 = 5.71s

physics
160 = .5gt^2 = 5.7s

physics
125 = .5gt^2 = 5.1s

Algebra
Determine if the following two planes 2x+3y-z=4 and 3x-4y-6z=1 are parallel, orthogonal or coincidental

Science
What is it called when scientists do their experiments more than once to reduce chance errors?

calculus
Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the y-axis. y=4/x, y=0, x=2, x=3 I know you have to integrate from 2 to 3 but im not sure what the integral should be

Calculus
Use cylindrical shells to find the volume V of a right circular cone with height 7h and base radius 4r.

Math
How is the number of zeros in the quotient in 180 divided by 8 equals 20 related to the bumber zeros in the dividen?

Math
The Energy formula is (f(t))^2 dt over the integral from t2 to t1. However, I don't know how to utilize it in this case.

Math
f(t)=A[u(t)-u(t-10)], where u(t) is the unit step function. Is the energy of this signal finite? Why or why not? If it exists, find the energy of this signal.

Science
A pallet of boxes weighing 10 tons is dropped from a lift truck from a height of 10 feet. The maximum velocity the pallet attains before hitting the ground is 6 ft/s. How much kinetic energy does the pallet have in (ft)(lbf) at this velocity?

social studies
what are types of land and waterways also known as? Physical features or landforms?

English
Help with fragment, The panther lay motionless behind the rock. Waiting silently for its prey.

math
suppose 1 milliliter of ink can print 30 pages of text. How many pages of text could you print with 2 quarts pf ink?

managerial economics
20 thousand 20 dollars per pound 400000 5

French
I'm in grade 9, and my oral exam is coming up on monday. One of the possible questions involves knowing the plot of the textbook 'Sans frontieres 9e' that I had to return already. Specifically 'Selon toi, qui a commis le crime a\Logi-clique? Pourquoi?' ...

grammar verb adverb
What is the verb and adverb in the sentence The unpredictable volcanic activity discourages people from living there.

8th grade Composition
Identify parts of Speech for sentence below, on numbered word: 1 2 3 Before the eruption, Mount St.Helena was 4 like a giant pressure cooker.

geometry
Classify the triangle as right, acute, or obtuse if the measures of its sides are 28, 46, and 53.

English
Are there any deeper ideas in Journey to the Center of the Earth by Jules Verne? i.e. irony, symbolism, or anything like that

Waves
Hey just finished this question on mastering physics. The velocity of a wave is defined as wavelength*frequency. it is also defined as sqrt(Tension/(mass/rope length)). Set the two definitions equal to each other and solve for the Tension and you should have your answer!

ap calculus ab
what is the derivative of y=arccos(4x)/3x

ap calculus ab
what is the derivative of y=arccos(4x)/3x

science
an unknown metal has a volume of 20cm^3 and a mass of 54g. Identify the metal

Language Arts 7th Grade
i am doing a speech about the kx65 and i am having trouble with the introduction (the kx65 is a dirt bike by the way.

5th grade MATH!!!!!
No, it can only have one midpoint, because if it had two midpoints, then there would be two line segments! Also, if you add two midpoints, then thus creating another segment.

trig
How do I solve for theta in tan theta = -1?

math
I wrote my question wrong. It should be write 25000000 in expanded notation using the power of 10

math
write 25000000 to the power of 10

4th grade
quadrilateral

Social Studies
World War I 1. The alliance system was supposed to prevent war, but it turned a local conflict into a general European war. Why did it fail so badly? 2. World War I cost Germany and other European countries on an economic and a social level. How were people's everyday ...

Chemistry
Write an equation for the reaction between the Bronsted-Lowry acid HOCl(aq) reacting with base CO32-(aq) I am having difficulty with this question. Here is what i have so far but I know i went wrong somewhere. HOCl (aq) + CO32-(aq) --> HCO3-(aq) + OCl(aq) Any help would be ...

Physics/ Adamson University
Q=0 delta U= -W delta U= 410j but since it is compression delta U= -410j Temp should rise since the pressure of the system increased

Mathematics
A solution is mixed with a 12% acid solution to form a 16% acid solution. How many liters of the 20% acid solution are used to make 10 liters of the 16% acid solution?

physics
The current of a river is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible? Distance of river is 120 m.

AP Chemistry
A 500 g piece of metal at 60 degrees celsius is placed in 200g of water at 22 degrees celsius contained in a coffee cup calorimeter. The metal and water come to the same temperature at 32.5 degrees cesius. The specific heat of the water is 4.184 j/g(degrees celsius) a) how ...

AP Chemistry
i still keep messing up, can someone give me a specific answer i can use as a base?

Math
Thank you

Math
Two small planes start from the same point and fly in the opposite directions. The first plane is flying 35 mph slower than the second plane. In 2 hrs, the planes are 530 mi apart. Find the rate of the slow plane.

SOCIAL STUDIES
THIS IS ABOUT EXPLORERS. WHAT IS A JOURNEY MADE FOR A SPECIAL REASON?

Math
The price of an international call from Detroit to Paris, France, using a particular phone company is 75 cents for the first 5 minutes and 10 cents for each additional minute or fraction thereof. What is the cost (in dollars) of a 25 minute call from Detroit to Paris?

physics
Jennifer (mass 58.0 kg) is standing at the left end of a 13.0 m long 594.0 kg cart that has frictionless wheels and rolls on a frictionless track. Initially both Jennifer and the cart are at rest. Suddenly, Jennifer starts running along the cart at a speed of 5.70 m/s relative...

Language Arts
Is the following a correct sentence: Martha and him ate the sandwich.

math
what is 6 3/4 - 7 2/8

social studies
compare trading in China, America, Egypt and Greek then and now.

social studies
what is the history of trading then and now

Physics
A spring has a spring constant of 259N/m. Find the magnitude of the force needed (a) to stretch the spring by 3.54 10-2m from its unstrained length and N (b) to compress the spring by the same amount. N

5th grade Language
Read the poem and answer the question 1. There once was a owboy named Ray 2 who never had that much to say 3 except or the times 4. Stampedes topped on a dime 5 when that cowboy named Ray hollered "hey" 1 in which lines do you see repetition? 2 what is the example of...

4 grade
do you have a anwser to this question ,68, ,94, ,120 and the rule

Physics
I think the 2a is meant to be 2 * a

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