Questions Asked on
August 8, 2011

Calculus
A sphere with radius 1m has temperature 15 degrees C. It lies inside a con centric sphere with radius 2m and temperature 25 degrees C: The temperature T(r) at a distance r from the common centre of the spheres satisfi es the di fferential equation:
asked by Maria 
Physics
A 40 g marble moving at 2.3 m/s strikes a 29 g marble at rest. Assume the collision is perfectly elastic and the marbles collide headon. What is the speed of the first marble immediately after the collision? What is the speed of the second marble
asked by falcon306 
thermodynamics
Consider two closed systems A and B. System A contains 3000 kJ of thermal energy at 20°C, whereas system B contains 200 kJ of thermal energy at 50°C. Now the systems are brought into contact with each other. Determine the direction of any heat transfer
asked by Yash 
Physics
A car is traveling at 14 m/s. How fast would the car need to go to double its kinetic energy? By what factor does the car's kinetic energy increase if its speed is doubled to 28 m/s? We only get 3 chances and I'm on my last one before I get the question
asked by falcon306 
physics
The pulley in the figure represents different pulleys with outer radius and inner radius indicated in the table. The horizontal rope is pulled to the right at a constant speed that is the same in each case, and none of the ropes slips in its contact with
asked by help123 
ECE
At which grade level is it most appropriate for children to group by more than one attribute? A. Primary B. Kindergarten C.Four years old D.Preschool
asked by Karen 
Physics help
A 300 g bird flying along at 6.4 m/s sees a 10 g insect heading straight toward it with a speed of 34 m/s (as measured by an observer on the ground, not by the bird). The bird opens its mouth wide and enjoys a nice lunch. What is the bird's speed
asked by falcon306 
physics
5) A person on a motor cycle gains a speed of 10kmph to 60kmph in 10 secs. The angular rotation of the needle in the speedometer is about 200 degrees. What will be the angular speed in degrees/sec?
asked by Anonymous 
Physics
Marissa drags a 15 kg duffel bag 18 m across the gym floor. If the coefficient of kinetic friction between the floor and bag is 0.15, how much thermal energy does Marissa create? It says I'm look for deltaE_Th. I don't know what that means or how to figure
asked by falcon306 
KENDRIYA VIDYALAYA, PHYSICS
A PROJECTILE HAS SAME RANGE 'R' WHEN MAXIMUM HEIGHT ATTAINED BY IT IS EITHER 'H1' OR 'H2'.FIND THE RELATION BETWEEN,'R','H1','H2'.
asked by YASH 
Chemistry
what is the pH of a 0.025 M aqueous solution of sodium propionate, NaC3H5O2? What is the concentration of propionic acid in the solution?
asked by Henry 
Physics 1 (college)
Chap. 7, #36. (II) A ball is dropped from a height of 1.50 m and rebounds to a height of 1.20 m. Approximately how many rebounds will the ball make before losing 90% of its energy?
asked by Anonymous 
differential calculus
a ferris wheel 15m in diameter makes 1 revolution every 2 minutes. If the center of the wheel is 9m above the ground, how fast is the passenger in the wheel moving vertically when he is 12.5m above the ground?
asked by Adler 
Epidemiology
Identify the study design best described by the scenarios or research questions presented below. Provide a twosentence rationale for your answer. Choose from: • Ecologic • Crosssectional • Casecontrol • Retrospective (Historical) Cohort •
asked by Confused 
helping abused children
Im still stuck on number 11 and 17 will you please help 11. As a teacher aide, if a child wishes to speak to you about an incident of abuse, what should you do first? A. Assure the child that you can help B. Find a quiet place were you can talk
asked by beth 
economics
Samantha Jones has a job as a pharmacist earning $30,000 per year, and she is deciding whether to take another job as the manager of another pharmacy for $40,000 per year or to purchase a pharmacy that generates revenue of $200,000 per year. To purchase
asked by aaniya gill 
calculus
Find the sum of the series 2 + 9/2! + 27/3! + 81/4! . . .
asked by julia 
maths
A vampire enters a town and bites 2 person every night. The bitten 2 persons grows in to two big vampires and bites 4 persons the next night. These 4 vampires bites 6 people the next night and the 6 bites 8 and so on.......how many vampires will be there
asked by Anonymous 
English
I am writing an 5 paragraph essay on being stranded on an island. I chose a narrative. How does this look so far? ThesisIt was at this moment that Willie realized the reason he had been sent to this whole new environment and now had to learn a new way of
asked by lizzie 
math
if the line y=1.732(x1.732) cuts the parabola y^2=x+2 at the point A and B. find PA.PB, where P is the point where line cuts the xaxis.
asked by sonu 
calculus
(a) Modifying the parametric equations of a unit circle, find parametric equations for the ellipse: x^2/a^2 + y^2/b^2 = 1 (b) Eliminate the parameter to find a Cartesian equation of the curve x=2sint; y=4+cost; t >(or equal to) 0
asked by Anna 
Chemistry
How many calories are absorbed when 56.0 g of liquid water at 100C is vaporized to steam at 100C?
asked by Molly 
chemistry
A) Calculate the hydrogenion concentration of a 5.45*10^4 M H2CO3, solution, noting that Ka is bigger than Kb. B)What is the concentration of CO3^2? after finding the concentration to A), do i use that concentration (M) as the initial M for CO3^2?
asked by Henry 
Precalculus
What is the magnitude of the resultant of a 100 newton force along the xaxis and a 150 newton force at an angle of 40° to each other? Where do i start?? help!
asked by Hanson 
OSCM
Develop a production plan and calculate the annual cost for a firm whose demand forecast is fall, 10,000, winter, 8,000, spring, 7,000 and summer 12,0000. Inventory at the beginning of fall is 500 units. At the beginning of fall you currently have 30
asked by LCESKM 
Algebra
Do I have the right answer? A store owner bought a machine that laminates cards. the machine cost $1000. Each laminated item costs the owner $.50, but he charges the customers $4.00 per item. how many cards must be laminated and sold before the owner makes
asked by lizzie 
biology
Define and distinguish between selffertilization, crossfertilization, truebreeding organisms, hybrids, the P generation, the F1 generation, and the F2
asked by Anonymous 
geometry
What is the area of a trapezoid with bases of 2inches and 4 inches and a height of 3 inches
asked by Linda 
Physical Chemistry
1.6 mol of Neon gas are heated from 20.0 °C to 85.2 °C at a constant pressure of 1 atm. Calculate the work done. (R = 0.082057 L.atm/ K. mol)
asked by Alfred 
Statistics
While attending a sales meeting you were asked about the relationship between sales calls and actual sales made. Fortunately, you had just completed a study on this topic bu you failed to bring the report with you. However, you do recall that the
asked by Bob 
College Algebra
last year Lien earned $1,900 more than her husband. together they earned $59,100. how much did they both earn?
asked by Tangela 
math
if equation of directrix of a parabola is 2x+3=0, axis is 2y3=0 and length of latus rectum is 6 then what will be the focus?
asked by sonu 
math
what will be equation of latus rectum of parabola x^22x+4y=0.
asked by sonu 
math
An equitorial triangles is inscribed in the parabola y^2=4ax, where one vertex is vertex of parabola. what will be the length of the side of triangle?
asked by sonu 
Physics
Two objects x and y with a total mass od 2.5 x 10^3 kg are joined together in outer space and are at rest. An astronaut in a space shuttle presses a button that is explosive and separates the two objects from each other. X moves to the right with a
asked by Xanther 
Calculus
a) Find the Taylor series associated to f(x) = x^2 at a = 1. Be sure to show the general term of the series. b) Find the radius of convergence of the series. c)Use Lagrange's Remainder Theorem to prove that for x in the interval of convergence with x > 1;
asked by laura 
math
(six to the secon power / 3 x 10.5 )  8.2
asked by drea 
math
Have you seen any graphs in a meeting at work or in a business situation that you thought were useful? Do you think graphs are useful for describing functions, or do they have the potential to cause even more confusion?
asked by shaloo 
math
You have just graduated from college and landed your first big job. You have always dreamed of being a homeowner, and after carefully shopping for your dream home, you find one that you would like to purchase at a cost of $250,000. After researching banks
asked by Tonia 
Modern History Oral Assignment
Hi I'm doing an assignment on the Cold War. Specifically the role the Warsaw Pact and Nato played in increasing tensions. My problem is that it is a multimodal, so I need to present a speech and back it up visually. I don't want to do a powerpoint or
asked by Em 
trig
If z=1+i, then the multiplicative inverse of z esqaire is:
asked by Anonymous 
math
what will be the focus and directrix of parabola y*y = 16x.
asked by sonu 
math
if one point of a focal chord of a parabola x^28y=0 is (4,2), what will be the other end of the focal chord.
asked by sonu 
statistics
27. Consider the following hypothesis test. H0: µ = 15 Ha: µ ≠ 15 A sample of 10 gives a sample mean of 8.9 and population variance of 9. Consider the following data drawn from a normally distributed population: 4, 8, 12, 11, 14, 6, 12, 8, 9, 5, α =
asked by charlie 
chemistry
What is the pH of a solution in which 296 mL of HCl measured at 28.0 C and 1.02 atm, is dissolved in 1.5 L of aqueous solution?
asked by Angel 
Math
Valerie soent 32% study time on math and science. Math @ 3 hrs and Science at 5 hrs. How much time spent on studying subjects?
asked by Reanna 
Physics
a barrel of oil at rest has a mass of 65kg it is rolled down a 1.2m ramp. Due to constant force exerted on it, the barrel reaches a velocity of 4.2 m/s upon leaving the ramp. Find the constant force on the barrel while it is on the ramp? Help please.
asked by Tyners 
Physics
The mass of mars is 6.42 x 10^23 kg and its radius is 3.38 x 10^6m, What is the weight of a 70.0 kg student on this planet? I know weight equals (m)(a) but im not sure how to relate it to the information given
asked by Tiaanne 
english
In 1999, I went to Disney World for vacation. What are the verbs in this sentence
asked by Sarah 
MATH
Which two different even numbers (less than 10) have the sum of 12? (whose sum is 12)
asked by Amy 
public health
Where did the practice of public health first originate? North america South America Asia is it North America?
asked by dan 
Math
Equations with Rational Expressions 5/3x  1/9 = 1/x
asked by Jlewis 
PHYSICS HELP
A solid cylinder has an area of 10cm2 and a height of 1.0 m. The cylinder is composed of two different materials with mass densities of 2000 kg/m3 and 1500 kg/m3. If each of the two materials occupies an equal volume, what is the mass of the cylinder?
asked by Melissa 
math
Find the volume of a cone with a height of 7.1 m and a circular base whose radius is 3.2 m. Use 3.14 for pi.
asked by laurie 
Human Service HSM/230
help needed with this assignment: 1. What are the characteristics of a mission? 2. What are three hypothetical examples of a mission? 3. In what ways do the examples fit the characteristics of a mission, if they do not fit the characteristics, also explain
asked by Jan 
Psychology
Can one be happy in life just by seeing others happy? No because a lot of things can make you happy?
asked by Jia 
Chemistry
How many moles of helium gas are there in a 10liter balloon, inflated to a pressure of 1.00 atm at a temperature of 300K
asked by kortnie 
SQL server help!
A SQL statement is needed to create a stored procedure, which adds a new record to the Part table of week 3. The stored proc returns an out parameter that contains the value of the PartID PK of the record just added. Input parameters are needed to pass the
asked by Anonymous 
marketing
i need example of a informative and positive message ..
asked by jhallyn 
Soc/105
why does plagiarism have a red x next to my paper when trying to check it?
asked by Anita 
calculus
In a problem where you have to solve the limit f(x) as x approaches x sub zero, what does x sub zero mean?
asked by Kaitlyn 
math
So i need to figure out what the angle and speed was of a foot ball that traveled 59 yards how can i figure that out? what formula can i use?
asked by Kate 
math
find whether the point (2,10/3) lie inside or outside the parabola 2xx^2+3y=0.
asked by sonu 
Management
I need a diagram for WalMart Divisional Structure. I search and google it. I can not find one.
asked by Jos 
soc/105
what are the different ways that you consume popular culture?
asked by Anita 
programming
Hi i need to make a video (ON gps) using still image on AVI SYNTH. At the same time i have to use atleast three editing techniques they are a)dissolve, b)fade, C)crop, d)resize and e)zoom. i wrote my script but i couldn't play the video. please help. #
asked by Sub 
English
Is this better? Paragraph 1&2 Can my thesis statement stay the same even though we changed it slightly? I awake very groggy, to find myself on this very remote island with not a person in sight. Attached to my shirt is a letter written by my English
asked by lizzie 
grammar
What is a gender
asked by Anonymous 
english
which of the following is a runon sentence? the house was owned by the mayor. mike joined the army, an he became more disciplined during the training. Karen's uncle arrives tomorrow she wants to see him. we like to take a walk after dinner.
asked by Anonymous 
communication skills
case study about transportation
asked by bernard 
statistics
if 20% of the people in a community use the library in one year, find these probabilities
asked by krys 
arithmetic
kim can a rent a boat from company A for $ 120 for the whole day .She can rent the same boat from company B for a fee of $ 40 plus $ 20 per hour . what is the number of hours at which the rental fees will be the same ?
asked by rut 
Engllish
Here it is. I still haven't come up with a wow ending sentence. Do I need to change my thesis statement in the 1st paragraph? I did change it in the last. I awake very groggy, to find myself on this very remote island with not a person in sight. Attached
asked by lizzie 
math
4 x (322) + 12/4 x 3 ?
asked by drea 
math
given the function f(x)= x+2, find each of the following f(7), f(6), f(0)
asked by chris 
reading
I need help on writing a book report on anastasia absolutely
asked by hannah 
math
Find cos x if sin x cot x = 4. I got 4 but isnt it impossible for cos to equal 4? Isnt it only supposed to range from 1 to 1? the answer choices are 1)4 2)2 3)1 4)sqrt 2
asked by kate 
math
Create a lineaer equation from your own life and then write a brief paper describing this linear function. It should relate a particular 'thing' to another 'thing'. It could be something about the amount of money you spend, the number of minutes you spend
asked by shaloo 
child developement
according to erickson, lack of identity is
asked by carol 
statics
test 55%answer correct 44 correct answers how many questions on test
asked by jo 
phi103
21{1[2(24)24]}> The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses
asked by Anonymous 
SQL for business help
I have no idea where to begin with this. A SQL statement that creates a user defined function that returns an int value is needed. This int return value is obtained by deducting the lowest Count field value from the highest Count field value of the Part
asked by Anonymous 
ECONOMICS
a firm faces the following. TC= 10020Q+3Q^2 , TR=60Q2Q^2 . Find (i) TFC , (ii) AC , (iii) AVC , (iv) MC , (v) AR , (vi) MR
asked by FOSTER 
science 10
A tennis ball is held stationary and then dropped from the roof of a tall building. What will be its velocity after 3.0 s?
asked by eric 
science 10
A student driver is travelling at 22.2 m/s and sees a school zone ahead. Using her brakes, she accelerates at 2.8 m/s2 to reduce her velocity to 8.2 m/s. How much time did it take to change her velocity?
asked by eric 
Physical chemistry
Ag(s) + Cl2(g) > 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?
asked by Alfred 
math
find whether the line 2xy=0 is tangent, real chord on imaginary chord to the parabola y^22y+4y=0.
asked by sonu 
Math
2x+9y=56 9x9y=0
asked by Denise 
math
Find all the points om the parabola y^2=8x, whose focal distace is 4.
asked by sonu 
pre algerbra
a8+2
asked by Carus II 
pre calculus
2< x < 5  
asked by Carus II 
Geometry
How do you find the measurements of two opposite sides of a rectangle when given x+10=2x+8?
asked by Miranda 
Business
You're an individual investor who holds common stock in a large blue chip company. You've received notice of a proposed change. Instead of using the existing statutory method, the proposal calls for the company's board of directors to be elected by the
asked by Cory 
Stats
A strong positive correlation of .95 indicates that the independent variable X is the cause for the variaton in Y. True/False I say False but don't know for sure.
asked by Bob 
english
what are the proper nouns for this sentence He was also concerned about poverty in America, some of his paintings illustrate his varied intrests
asked by Anonymous 
statistics
Suppose that X is in finate(6,25) determine the vale of b in P(X greater than b)=0.66
asked by mandi 
Econ
MR=100010p Solve for p
asked by Hi 
English
Please let me know what you think? I have the 1st three paragraph Imagine being ripped from the bed by several strangers, blindfolded, handcuffed and thrown into the back of a car, sometime later a plane, and then a small boat. Willie awakes very druggy,
asked by lizzie 
Science
Give specific examples of at least two (2) production and two (2) consumption habits humans have related to material resources.
asked by Renae 
english
In the Book theif What does Herr Steiner ,Rudy's father do for a living ? help me answer this question thank you
asked by joy 
statistics
if 20% of the people in a community use the library in one year, find these probabilities. a) at most 3 people used the library b) exactly 3 people used the library c) at least 5 people used the library
asked by krys 
Thermodynamics (Chemistry)
Ag(s) + Cl2(g) > 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?
asked by Alfred 
science 12 (electricity)
What experiment can i use to test the amount of time constants needed to charge or discharge a given capacitor? Please...and is the time to charge and discharge the same? im a bit confused. Thanx in advance
asked by Luke 
Math
(i) Solve the equation 3y^25y2=0 (ii) hence, solve the equation, 3(1/x1)^2 5(1/x1)2=0
asked by StuartKess