# Posts by frank

Total # Posts: 519

physics
A model rocket is launched straight upward with an initial speed of 60.0 m/s. It accelerates with a constant upward acceleration of 2.00 m/s2 until its engines stop at an altitude of 130 m. (a) What is the maximum height reached by the rocket? m (b) How long after lift-off ...

chemistry
-10KJ

College Physics
thank you

College Physics
2 questions: a)Assuming that water has a density of exactly 1 g/cm3 (cubed), find the mass of one cubic meter of water in kilograms. b)Suppose that it takes 10 hours to drain a container of 5700m3 (cubed) of water. What is the "mass flow rate," in kilograms per ...

math
yes you suppose to multiply the squared polynomial...but i was not to sure. Here is what I have for an answer... x^4-8x^3+28x^2-48x+36

science
the atomic mass of N is 14 u and that of Ca is 40 u. the proportion of n by mass in the compound Ca3N2 is what?

physics
x-rays produced in an x ray machine can have a frequency of 1.4*10^14 what is the wave length of these electromagnetic waves in nm?

Algebra
more than \$7000 to reach her goal.

algebra
Yes. Answer choice A is correct. If you simply take the one factor they gave you, which is 2x+y, and multiply by answer A, which a-b, you get 2ax-2bx+ay-by

ethics
explain the ethics of public service. why must all criminal justice professionals adhere to such a set of ethics.

ethics
given the fact that there is no national religion in the US, what application do the ethics of religious testaments have on the average American criminal justice practitioner?

ethics
Explain the hierarchical rule of identities. How could such a hierarchy influence the decisions of a cia agent stationed in a foreign country?

ethics
Explain the Edwin Meese synddrome, giving examples from the fields of probation and parole

Science
The centers of rebound are probably the places where the ice first accumulated. The centers of rebound are probably places where the ice was thickest.

Math SAT Sheet
1.) Find the domain and range for: f(x)= 4x-20/ the square root of 36-x^2 2.) Solve the equation: log6 (x-11) + log6 (x-6) = 2 3.) Solve the inequality: x^2 - 2x - 3 is greater than 0

math
100

AP Chemistry
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...

AP Chemistry
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...

AP Chemistry
Thank you! For part B I did the same thing only this time I used 3.00 L. However I can't seem to find the value of x... I am coming up with 0.0191, but when I substitue that in I do not come up with 5.84 x 10^ -3

AP Chemistry
It is N2O4 ==> 2NO2 with Kc= 5.83 x 10^-3 (the arrow is actually a double headed arrow to symbolize equilibrium) Sorry for the misunderstanding! I didn't realize the arrows were like that

AP Chemistry
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...

CHEMISTRY HELP NEEDED A.S.A.P
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...

Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...

CHEMISTRY HELP DESPERATELY NEEDDED!!!
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...

IT
If I have a steel cable pulling 5 degrees from straight down by 1500lbs. This cable goes up to the top of a 10 foot pole and is attached. Then I have a cable going out 20 feet in the opposite direction back to the ground. How many lbs. of force will be pulling at the end by ...

English
Sleeping is my favorite hobby "sleeping" help verb? being verb? or a gerunds?

physics
A 5.0 kg book is sitting on a table. Which describes the force acting on the book a. there are no forces acting on the book b. the force of the table upward is greater than the force of gravity downward c. the net force on the book is zero d. kinetic energy counteracts the ...

algebra
So is the line between the -3 and 2 like a divison sign?

algebra
Evaluate and tabulate the values of y for the value(s) given. y = 2x3, for x = -3, 0, 1, 4 Can someone explain how to set this up? I do not know what the question is wanting me to do.

college english
I need to know if there are any grammatical errors in the following rewritten paragraph. Thank you. However, dictionaries are often wrong about this; in fact, by putting one word first, they are supporting a self-fulfilling prophecy. Consider the entry “ax or axe”, ...

Bayside insurance offers two health plans. Under plan A, Giselle would have to pay the first \$60 of her medical bills, plus 25% of the rest. Under plan B, Giselle would pay the first \$250, but only 20% of the rest. For what amount of mediacl bills will plan B save Giselle ...

physics
does anyone know who conducted the experiment or a credible description of the experiment that helped prove Einstein's thought experiment: the twin paradox? as in the experiment in which one cesium-beam atomic clock stays on Earth, while another one takes flight and the ...

physics
thankyou! i just need one more now and am having a hard time..

physics
is anyone aware of evidence (preferably experimental evidence) in support of time dilation. in other words proof that it actually occurs. that is, experiments other than the one of Hafele and Keating. i just need a starting point for some research.. just a name or the title of...

Impossible chemistry problem
Kinetics Challenge Problem Consider the following reaction: CH3X + Y → CH3Y + X At 25oC, the following two experiments were run, yielding the following data: Experiment 1 : [Y]0 = 3.0 M [CH3X] Time(hr) 7.08 x 10-3M 1.0 4.52 x 10-3M 1.5 2.23 x 10-3M 2.3 4.76 x 10-4M 4.0 8...

Science Projet
johnson's

physics
Would you see the same thin film interference pattern in a film of soap surrounded by air and a film of soap on glass? Why or why not?

physics
Would you see the same thin film interference pattern in a film of soap surrounded by air and a film of soap on glass? Why or why not?

physics
What up what up what up

math
how to write two differnt word phrases for the expression t 30

Math
Thank you very much. I wrote my question incorrectly. It should be the cost of renting buses (plural). Would that be something like 350 times n/60?

Math
the total cost for a school bus rental is 350\$/day. Each bus holds 60 students. Find the cost (c) of renting the school bus as a function of the number of students going on a trip (n). My answer: I have come up with relating the 350\$ to n/60 but i am stuck on where to go from ...

Physics
Please someone help me I'm desperate!!!! Two steel guitar strings have the same length. String A has a diameter of 0.59 mm and is under 420.0 N of tension. String B has a diameter of 1.3 mm and is under a tension of 840.0N . Find the ratio of the wave speeds,VA/VB , in ...

physics
A spring has k = 88 N/m. Use a graph to determine the work needed to stretch it from x = 3.6 cm to x = 5.6 cm, where x is the displacement from its unstretched length.

Physics
Hi I'm kinda new here, and hope someone can please help me out. A person exerts a tangential force of 38.1 N on the rim of a disk-shaped merry-go-round of radius 2.74 m and mass 207 kg. If the merry-go-round starts at rest, what is its angular speed after the person has ...

physics

math
Pi

Physics
ok what i like to do is list what i know. the elastic cord stretches from 28m to (36-4)m so x=36-4-28=4m m=680N h1=36 h2=4m the question is asking for k ok lets start mgh1 = mgh2 + .5kx^2 .5kx^2 = mg(h1-h2) k = 2mg(h1-h2)/x^2 k=2720

blah
Wow. I WAS going to register and ask for some help myself due to the lack of comprehension in my readings, but I would not want MS SUE discouraging my needs.... Good luck with that MS SUE.

MATH
Determine the x-intercepts for y = x^3 + 4x^2 - 4x - 16 and for y = 2x^4 - 5x^2

Pre-Algebra
Solve 0 = 3x - 4

language arts
For the second question the answer is: coup and cup

database
How many conflicts are there in the schedule Sa: r1(Y); r2(Y); w1(Y); r1(Z); w2(Y); w1(Z)

Database
22. Which one of the following schedules has a conflict? A) Sa: r1(X); r1(Y); r2(Z); r1(Z); w1(X); w1(Z) B) Sb: r1(X); r2(X); r1(X); r1(Y); r2(X); w1(Y) C) Sc: r1(Z); r2(X); w1(Z); r1(Y); w1(Z); w2(X) D) both a and b

PHYSICS PLLZ HELP
1- wave velocity is related to a- period b-wavelength c-amplitude d-all of these 2- wave amplitude is related to a- wave velocity b- frequency c- energy d-wave length 3-which of the following radiation has te smallest frequency? a- infrared b- visible c- ultraviolet d-x-rays 4...

math
how can you find the length of a line of a isosceles trapezoid?

math
Samuel has read 5/6 of his assignment. Judy has read 10/12 of her assignment. Who has read more?

Social Science
Can someone summarize E.K. Hunt's "The Conflict in Mercantalist Thought" briefly? Im not sure I understand the piece.

government

math
Round the number 23.5724 to two decimal places

Intermediate Accounting
Python Company leased equipment from Hope Leasing on January 1, 2006. Hope purchased the equipment at a cost of \$232,666. Other information: Lease term 3 years Annual payments \$90,000 on January 1 each year Life of asset 3 years Fair value of asset \$232,666 Implicit interest ...

210 kids in class. one out of 7 in left handed the rest in right handed. how many are right handed.

calculus
Find an equation of the tangent line to the curve at the given point. y = 3x^2 - x^3, (1,2)

calculus
THe equation of motion of a particle is s = t^3 - 3t, where s is in meters and t is in seconds. Find (a) the velocity and acceleration as functions of t (b) the acceleration after 2 s, and (c) the acceleration when the velocity is 0

math
how do u get the answer? A nurse has to record her temperatures in Celsius but her thermometer reads Fahrenheit. A patient's temperature is 100.7° F. What is the temperature in °C

math
If 8x + 5x + 2x + 4x = 114, the 5x + 3 =

math
Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost \$450?

math
The sales price of a car is \$12,590, which is 20% off the original price. What is the original price?

math
If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

math
If Lynn can type a page in p minutes, what piece of the page can she do in 5 minutes?

math
you need 39% correct out of a %100 tesy how many would u need right

Research Writing
What strategies does an author use to formulate an argument?

eth125
THAR BOTH CONTRIES

journal assignment
how many liters of a 10%solution of acid should be added to 20 liters of 60%solution of acid to obtain a 50%solution?

space
what kind of galaxy is the milky way?

MATH (SURDS)
we have been asked to prove that it is possible to determine the value of a surd using either similar figures or Pythagoreans theorem. we have been shown how to construct the surd using a compass and ruler. but we now have to prove that our method is correct. we know that (...

trig
A geologist stands on the shore of a lake in Ontario with a theodolite and finds that the angle of inclination to the top of a distant rock pillar is 28.5 degrees. He then walks 10 m along the shore at a 90 degree angle to his measurment, and finds that the angle to the same ...

Thanks for the ideas, yoink!

algebra
ii.The top of Mt McKinley (20,430 feet above sea level) My Answer: w = 99.96 pounds 2. The equation D=1.2(sqrt)h which should read D equals 1.2 square root of h gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a. Solve this ...

algebra
ii. The top of Mt McKinley (20,430 feet above sea level) My Answer: w = 99.96 pounds 2. The equation D=1.2(sqrt)h which should read D equals 1.2 square root of h gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a. Solve this ...

algebra
You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on earth also varies ...

math-patterns
what is the next number in the pattern 6,38,932,1087,12437

Math
6x-10>2x+6 4x-10>6 4x>16 x>4

CHEM-HELP!!!!
q=ms?t q= 33.136g x 4.184 J/gxC x 16.8C q=2,329.17 J (liquid) ?Hfus = 6.01 kJ/mole use stoichiometry: 33.136 g | 1 mole H2O = 1.838 mole | 18.02 H2O 1.838 mole | 6.01 kJ = 11.05 kJ | 1 mole q=33.136g x 2.108 J/gxC x 16.8C q= 1,173.49 J (solid) 2,329.17 J + 11051.5 J + 1,173.49...

Math
If the sum of the ages were unique, then the mathematician would have been able to solve it after the second piece of information...

physics
A uniform electric field of 500. V/m is directed in the negative x direction. A +15ìC charge moves from the origin to the point (x,y) = (20.0 cm, 50.0 cm). (a) what was the change in the potential energy of this charge? (b) Through what potential difference did the ...

genetics
Can anyone help me with Genetics? I have some problems and answers and need them explained to me. Here are some of the questions and answers: 1. Assume that a dihybrid cross is made in which the genes' loci are autosomal, independantly assorting, and incompletely dominant...

math
thanks Iblis

math
lim as x approaches 0 of (3 sin 4x) / sin 3x

Algebra

math
the words are in alphabetical order eight, five, four, ....

In comparing prices of canned peaches, Darren finds that a 10-oz can costs 98 cents, a 16-oz can costs \$1.49, and a 24-oz can costs \$2.35. Which is the best buy? My Guess: 10-oz*2.4=24-oz 2.4*\$.98=\$2.35 16-oz*1.5=24-oz 1.5*\$1.49=\$2.24 24-oz=\$2.35 Best Buy- 16-oz for \$1.49In ...

World History
Hi, I am preparing a presentation on Argentina- 20th century history which covers the country economically, socially and politically. Are there any websites that may help me with the social history of Argentina during the 20th century? Thanks http://www.google.com/search?q=...

Growing salt crystals
Epsom salts, rock salt as seeds, and iododized salt and alum

Math-related rates
A lamp post is 6m tall. Frank is 1.6 m and walks toward the post at .5m/s. How fast is the tip of his shadow moving when he is 8 m from the pole? http://answers.yahoo.com/question/index?qid=20070405145054AANaa0r

science
substances that are gases at room temperature The list of gases is too long to present here. Among the pure elements, the only ones are H2, He, F2, Cl2, Ne, Ar, Kr, Xe and Rn We can add O2 and N2 to the list of elements that are gases at room T. Yes, my mistake. Thanks, Bob

Physics help
In Millikan's experiment, an oil drop of radius 1.516 µm and density 0.860 g/cm3 is suspended in chamber C (Figure 22-14) when a downward-pointing electric field of 1.92 105 N/C is applied. Find the charge on the drop, in terms of e. (Include the sign.) Calulate the ...

Physics help----------thanks
A charged cloud system produces an electric field in the air near the Earth's surface. A particle of charge -2.2 10-9 C is acted on by a downward electrostatic force of 3.0 10-6 N when placed in this field. (c) What is the magnitude of the gravitational force Fg on the ...

Economics
Hypothetical Economy: -Money Supply= \$200 billion -Quantity of money demanded for transactions=\$150 Billion -Quantity of money demanded as an asset=\$10 billion at 12% interest -increaseing by \$10 billion for each 2 percentage point fall in the interest rate. A. What is the ...

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