Friday
December 19, 2014

Posts by Samantha


Total # Posts: 1,358

Physics please help
Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?
November 17, 2008

Physics
Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?
November 17, 2008

Physics
Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?
November 17, 2008

Physics
Are you getting 5.28 J for the total energy?
November 14, 2008

Physics
Also for position I'm getting 0.145 when I use this equation => x = -.013 sin 34.6 t + .0640 cos 34.6 t
November 14, 2008

Physics
I don't get it. I'm getting x = 0. Is that supposed to be right?
November 14, 2008

Physics
A 215 g mass attached to a horizontal spring oscillates at a frequency of 5.50 Hz. At t=0s, the mass is at x= 6.40 cm and has vx =- 45.0 cm/s. Determine: a) The Maximum acceleration to 3 significant digits. - I calculated this to be 7.64 but it keeps saying I have the wrong SD...
November 14, 2008

Physics
The two blocks in the figureoscillate on a frictionless surface with a period of 1.5s. The upper block just begins to slip when the amplitude is increased to 38cm. What is the coefficient of static friction between the two blocks?
November 13, 2008

Physics
Suppose that one oscillation of a swinging lamp takes 5.5s. What maximum speed does the lamp have if its maximum angle from vertical is 3.0degrees? I first found L to be 7.51m. That was right. Now, I calculated the angular frequency of the pendulum to be 1.14. I'm pretty ...
November 13, 2008

science
what are some key characteristics of fungi?
November 11, 2008

math
350*(6/100) = 21 350+21 = $371
November 11, 2008

physics
Use 1 of your kinematic equations twice. vfinal^2 = vinitial^2 + 2ad. First you want to find the speed of the drag racer right when the parachute opens. vfinal^2 = vinitial^2 + 2ad. Substitute 0 for vinitial^2 and take the square root of 2(17)(402). That becomes your initial ...
November 11, 2008

Physics
There is no kinetic energy unless the object is oscillating.
November 11, 2008

Pre-Algebra
what?
November 9, 2008

Pre-Algebra
In a-c, explain what would happen to a figure if you transformed it using the given rule. a. (3x, 6y) b. (x+2, y+1) c. (2x, 2y +5)
November 9, 2008

Pre-Algebra
A rectange has dimensions of 1 and 6. Another rectangle was drawn from it using a scale factor of 1.5. A. The area of the large rectangle is how many times the area of the small rectangle? B. The perimter of the large rectangle is how many times the perimeter of the small ...
November 9, 2008

Physics Really Need Help Please
I found 583 for the first one which is right. I have no idea how to do the 2nd and 3d question please help!
November 7, 2008

Physics Really Need Help Please
At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular ...
November 7, 2008

Physics
I don't understand the question. What's the displacement for either of those parts? What equation should I use?
November 7, 2008

Physics
At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular ...
November 7, 2008

MATH
well i think that is called the y-intercept form
November 6, 2008

MATH
How do you write an equation in standard form? Ex.How would you write this in standard form? y+1=x+2
November 6, 2008

5th Grade student teacher: Needs ur help....
What fun activity could I use to to teach 5th grade students about the Constitution?
November 6, 2008

9th
6a+4 = -8 6a = -8-4 a = -12/6 a = -2
November 5, 2008

4th grade math
The sum of two numbers times a third number is equal to the sum of each added number times the third number. For example 4 * (6 + 3) = 4*6 + 4*3.
November 5, 2008

Calculus
Use the quotient law where you find the derivative of f(x)*g(x)-the derivative of g(x)*f(x) and the whole thing divided by g(x). (x+2)(x^3+x-2)' - (x+2)'(x^3+x-2) ---------------------------------- (x^3+x-2)^2 (x+2)(3x^2+1) - 1(x^3+x-2...
November 5, 2008

Damon
Thank you so much for all the calculus help! I felt more prepared for the exam!
November 5, 2008

Calc again sorry
4) The graph of y = (x)/(1+25x^2) for x is greater than or equal to 0 has a horizontal tangent at x = what. So what I did was find the first derivative. I did the quotient rule and ended up with x50x - 1+25x^2 --------------- (1+25x^2)^2 I equated that with 0 but I don't ...
November 5, 2008

Calculus
lim(x->infinity) sqrtx sin(1/sqrtx) Someone please start me off. I don't know how to find the limits of trigonometric functions.
November 5, 2008

Calculus
How do you do this question. f(x) = (5x-1)/(2-3x), find f^(-1)(x). The answer is supposed to be (1+2x)/(5+3x). -------------------------------------- And can you please explain this one to me. Suppose that xy^(3)+2y^(2)+xy+2x^(3) = 0. Find the general expression for dy/dx. ...
November 5, 2008

Calculus
Don't you have to do implicit differentiation?
November 5, 2008

Calculus - Damon
Thanks so much!
November 5, 2008

Calculus - Damon
Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at some point. So I found the derivative which is 3x^2. Let (a, a3) be the point of tangency. 3x^2 = (a3 - 1/4)/(a-0) I'm not sure how to solve for a. Yes, the point is (0,1/4) but it&#...
November 5, 2008

Calculus part 3 so sorry
y = e^2xsin3x Find the derivative. So I used the product rule and I got sin3x(e^2x)+cos^3x(e^2x). But the actual answer is sin3x(2e^2x)+cos^3x(3e^2x) Where the the 2 and 3 before the e come from?
November 4, 2008

Calculus Part 2
y = tan(sqrtx) Find dy/dx. So I found it and I got the answer as sec^2(sqrtx) but the answer is (sec^2(sqrtx))/2(sqrtx)...why? ---------------------------------- 2) Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at some point. So I ...
November 4, 2008

Calculus questions..really need help, please!
1) Find the value of the lim(x->0) ((sin5x/sin2x)-(sin3x-4x)). I have no idea where to start so if someone could start it off for me it would really help. 2) If f(x) = (2x-3)/(5x+4) then what's the inverse of f(x) So I replaced x with y x = (2y-3)/(5y-3) Now am I ...
November 4, 2008

Calculus
Can someone explain the method of implicit differentiation to me. I know that we differentiation both sides of the equation with respect to x (I don't understand what they mean by with respect to x). And then y is a function of x...I don't understand what that means. ...
November 3, 2008

Calculus
Can someone explain the method of implicit differentiation to me. I know that we differentiation both sides of the equation with respect to x (I don't understand what they mean by with respect to x). And then y is a function of x...I don't understand what that means. ...
November 3, 2008

Math
22 layers
October 27, 2008

Math
Edward H. White, the first astronaut to spend 20 minutes free-floating in space, had to wear a special suit to protect him from heat, radiation, and particles. the number of layers in his suit is the number that is the only palindrome between 12 and 30. how many layers did his...
October 27, 2008

Science
are u saying that miles are bigger than km
October 27, 2008

Science
Which of these rates of speed is the fastest? 40 km/h 28 mi/h 19 knots/h I believe it is 40 km/h am I correct?
October 27, 2008

Science PLEASE, PLEASE, PLEASE ANSWER DUE TOMORROW
My body is covered with bony plates, but i am a fish. I am male, but i take care of all my young. i can swim, but i prefer to be carried by ocean currents. i look like a familiar land animal. What am i?
October 22, 2008

Verb form " to be"
How can I introduce or teach 3rd graders how to use the Correct Verb Form of the verb "to be"? I want to tell them when to use the words: am, is, are, was, and were....
October 21, 2008

US history
ok thank you,, do you know the flaws of the anti federalist views???
October 20, 2008

US history
Do you know the flaws of the federalist views
October 20, 2008

US history
Do you know the flaws of the federalist views? haha sorry...
October 20, 2008

US history
What are the flaws of the federalist views thank you guys so much!
October 20, 2008

US history
What were the key points to the Federalist viewpoint? Flaws?
October 20, 2008

US history
what/who did the antifederalists support? (what is diff. from them and the federalist beliefs)
October 20, 2008

US History
Was there anyone missing from the constitutional convention and if so who was missing from the constitutional convention? I didnt know some people were missing. Can some explain this?
October 20, 2008

Biology
What is 8 characteristics of animals?
October 16, 2008

11th grade
1. Bruce, an appliance salesman, earns a commission of $50 for each washing machine he sells and $100 for each refrigerator. Last month he earned $500 in commissions. Find all possibilities for the number of each kind of appliance he could have sold. 2. Luis has 95 cents in ...
October 15, 2008

7th grade
Maybe just comparing the differences of the elements?
October 9, 2008

math problem
on monday Sheldon brewed 1 bottle of tonic, on tuesday he brewed 4 bottles, wednesday he brewed 9 and thursday 16. How many bottles did he brew on friday? Is it 30?? I'm 10 years old thanks
October 9, 2008

Math question
Thank you very much. Sorry
October 9, 2008

Math question
I don't understand your answer?
October 9, 2008

Math question
on monday Sheldon brewed 1 bottle of tonic, on tuesday he brewed 4 bottles, wednesday he brewed 9 and thursday 16. How many bottles did he brew on friday? Is it 30?? I'm 10 years old thanks
October 9, 2008

math
on monday he brewed i bottle of tonic tuesday he brewed 4 bottles, wed he brewed 9 and thursday 16. how many bottles did he brew on friday?
October 9, 2008

6th grade
How can you make an input output division chart
October 8, 2008

Math
1808
October 7, 2008

Math
Jefferson Davis, President of the Confederate States of America, lived a square number of years. he died in 1889. The digits of the year in which he was born sum to 17. When was Jefferson Davis Born.
October 7, 2008

Science
Javier lives in an area where there is a lot of igneous rock. What is probably near by.
October 7, 2008

Science
I do not have shape or volume. You cannot see me, but i fill any container in which i am placed. I have weight, but you cannot hold me.What am I? Is it air?
October 7, 2008

Math
By how many degrees Fahrenheit do the frezzing point and the boiling point of water differ?
October 7, 2008

Science
I can live in both fresh water and salt water. When full grown, I migrate long distaces to my place of birth. What am I?
October 7, 2008

PreCalculus
Thanks! I didn't realize it could be so easy!
October 6, 2008

PreCalculus
I'm so confused... I've always been good at math but this year I'm just not getting it. But I know i can I always get help and a REAL explanation from the people on here so... A steel drum in the shape of a right circular cylinder required to have a volume of 100 ...
October 6, 2008

Science
Cells make tissue and tissue makes what?
October 5, 2008

math
Without actually graphing it, show that the graph of the equation x^3+y=x is symmetric with respect to the origin
October 2, 2008

Pre Calc
Without actually graphing it, show that the graph of the equation x^3+y=x is symmetric with respect to the origin.
October 2, 2008

Pre Calc
simplify the expression x-4 when x is less than 4
October 2, 2008

Science
Whats an example and non-example for cardiac muscle? Thanks again
September 30, 2008

Science
Whats a characterisic for axial skeleton? Thanks
September 30, 2008

Science
Whats an example and non-example of an axial skeleton?
September 30, 2008

supposed to be math
how many u.s. patents did Thomas Edison have? The number is 93 more than the number of pounds in half a ton. so basically i just need to know how many pounds are in half a ton
September 30, 2008

fifth grade
where can light travel, but not sound?
September 30, 2008

fifth grade
thanks
September 30, 2008

fifth grade
how many grams in a lb.
September 30, 2008

science
thanks
September 30, 2008

science
a cup of coffee, a 10 gallon aquarium, and a bottle of ginger ale were on the same table. on which container was there the greatest amount of air pressure
September 30, 2008

Science
thanks so much
September 30, 2008

Science
what is the largest organ human beings have
September 30, 2008

English
thank u greatly apreciated
September 30, 2008

English
what is a guide word and an entry word on a dictionary page. the one that i'm stuck on is what is a guide word
September 30, 2008

math
ok ya that could work. thanks ms sue!:)
September 28, 2008

math
im sorry that's what it says in my book its my last question. i know it doesn't make sense but tom im gonna get in trouble for not doing it, and there's no answer in the back of the book either for this one so im dead. that's exactly what it says i read it over.
September 28, 2008

math
sorry i wrote it wrong: Can you use a proportion to solve any ratio problem? if your answer is yes,which ratio problem would you not use a proportion to solve? if your answer in no, which ratio problem could you not use a proportion to solve?
September 28, 2008

math
Can you use a proportion to solve any ratio problem? If your answer is yes, which ratio problem would you not use a proportion to solve? if your answer is no, which ratio problem would you be able to solve?
September 28, 2008

math
thank u. :)
September 28, 2008

math
how would u do 60% of 65?
September 28, 2008

Math
its just at school for questions i can't ask for help, im fine with homework and all because ur here to explain but i don't have anyone right by my side for the tests. On the math tests the questions are really weird and stuff that wasnt even in our textbooks.
September 28, 2008

Math
lol ur so awesome!! im not so sure i did so well on my test last week though. i depended on u for all my homework, and for the test i had no help and i was frustrated. :(
September 28, 2008

Math
thanks Ms sue ur the best teacher ever! im for sure getting great in math this term! :D
September 28, 2008

anatomy
C- left common cartid artery It may be helpful to think of the aorta as a big hose coming out of the heart to supply the different parts of the body with oxygenated blood, that is fresh and high in oxygen. As that hose (Aorta) leaves the left ventricle it first gives a branch ...
September 28, 2008

language arts
I have to put together and present a strategy that is effective in the teaching of language arts at a specific grade level. What would a good idea be for around the grade 2 level? and why is it important?
September 27, 2008

health care
WATCH THE MOVIE BY MICHEAL MOORE! ITS GOOD but then again biased- but you can take your own views out of it!
September 27, 2008

math
n=30
September 23, 2008

english
nothing
September 23, 2008

Science
I grew in a cave, but i'm not alive. i began as water and minerals, but now i am solid. i grow upwards, but i never see the sky. What am i?
September 23, 2008

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