Questions Asked on
January 30, 2009

Physics
1. A flowerpot falls from a windowsill 25.0 m above the sidewalk. a. how fast is the flowerpot moving when it strikes the ground? dont i need to know the time it takes, what formula am i supposed to use for this? would 25 m be the displacement? b. how much
asked by y912f 
chemistry
Hello! my question is. Cumulene has chemical formula C4H4 with 7sigma and 3pie bonds. the 2 outer C atoms have a hybridization of "sp2", the H atoms have a hybridization of "s", and the 2 C atoms in between have "sp" hybridization. As I figured out, there
asked by Jam09 
physics
a person pushes a box across a horizontal surface at a constant speed of .5 meter per second. the box has a mass of 40 kg and the coefficient of sliding friction is .25. The power supplied to the boxx by the person is... please Explain!!
asked by hana 
math
Three students from grades 10,11 and 12 were elected to the student council. Grade 10: Tom(T), Sally(s) and Bill(B) Grade 11: Jerry(J),Anne(A)and Connie(C) Grade 12: Dan(D), Martha(M) and Gwen(G) A three member committee is to be formed with one person
asked by Katie 
biology
A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50–L container of cold water, what would be the approximate increase in the temperature of the water?
asked by Jack 
economics
A perfectly competitive painted necktie industry has a large number of potential entrants. Each firm has an identical cost structure such that longrun average cost is minimized at an output of 20 units. The minimum average cost is $10 per unit. Total
asked by adele 
Physics
please show me how to solve these: 1. Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway? answer=3.00 h 2. How much time would Simpson save by increasing his average
asked by y912f 
Physics
a car is accelerating at a uniform rate of 0.85 m/s^2. what is the magnitude of the car's displacement as it accelerates uniformly from a speed of 83 km/h to one of 94 km/h? i tried a formula that solves for displacement and uses initial and final velocity
asked by y912f 
Math
how do you find the constant of variation k for the direct variation? for example, 4x + 6y. how do you find k?
asked by Angie 
statistics
The mean GPA (grade point averagE. of all male students at a college is 2.77 and the mean GPA of all female students at the same college is 2.89. Suppose we take one sample of 40 male students and another sample of 50 female students from this college.
asked by Lee 
Physics
please show me how to solve this 1. A bus travels 280 km south along a straight path with an average velocity of 88 km/h to the south. the bus stops for 24 min. then, it travels 210 km south with an average velocity of 75 km/h to the south a. how long does
asked by y912f 
Algebra
Carmella has $1200 invested in two stocks. One returns 8% per year and the other returns 12% per year. The income from the 8% stock is $3 more than the income from the %12 stock. How much did carmello invest in each stock? B) wrtie an equation about the
asked by Yasmin 
Chemistry
I have 3 Questions: We actually did the lab experiment for this, but I have no idea whether my reasons are correct. 1) For the equilibrium system Fe+3 + SCN FeSCN+2, what would happen if you add 2 drops of Fe No3?. Which way will the equilibrium shift
asked by nate Leung 
Geography
i need to label a diagram of the drainage basin of the River Tees. the words i have got to use are: Tributary Mouth Confluence Source Reservoir Also i need to colour the diagram to show the relief of the drainage basin. A)Shade the river and its
asked by ZAC 
chem
write a mechanism for the reaction of sodium chloroacetate with 4chlorophenolate.  i know its a sn2 mechanism, but I don't know who to go about from here
asked by jason 
math
Four large oranges are squeezed to make six glasses of juice. How much juice can be made from six oranges.
asked by Ryan 
Chemistry
Assume that the element 107Uns is synthesized and that the sample contains 39.8% 270Uns (269.4 amu), 35.2% 271Uns (270.3 amu) and 25.0% 272Uns (271.2 amu). What is the value of the atomic weight? A. 270. B. 269.3 C. 270.4 D. 271
asked by Soonjung 
math
A rectangular field is four times as long as it is wide. If the perimeter of the field is 750 feet, what are the dimensions of the field?
asked by cindy 
Psych
CAN SOMEONE REVIEW MY ANSWERS AND TELL ME IF THIS IS CORRECT? Why is it flawed to ask how much of a particular behavior is due to genetics and how much is due to experience? It is inconsistent to think that behaviors are solely due to our genetic makeup.
asked by SinnerSaved 
Trig
Rules of Logarithms: Can someone explain how to do: 1) e^(2(ln)(x)) 2) e^(lnx) I know the rules I just don't understand how they apply.. thanks!
asked by Alli 
english
what are 2 figurative devices from obama's inaugural speech?
asked by mike 
music
I need to find the definition of harpsichord and also 4 examples of harpsichord. thanks
asked by Deacon 
Physics
Please check these answers[my letter choice is in CAPS]: 1. In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses? A. interpreting results b. stating conclusions c. conducting experiments d.
asked by y912f 
Math
Help with these problems would be greatly appreciated: 1.Find the definite integral of dx/(x(1+ln(x))from e^6 to 1. 2. Solve for x in terms of k for log[2,x^6)+log[2,x^10=k. (its log base 2) 3.Solve log base 3(log base 3, x)=2
asked by Angelina 
Physics
The professor gave us no background material or explanations for any of these questions. 1. Imagine that molecules of H20 are stacked up in a cubic array, like a large number of cubical boxes. Each water molecule is taken to be at the center of each cube
asked by jm 
Statistics
Construct the appropriate control chart for the observations listed below, using 3 sigma limits. Product Number  Number of defects 1  3 2  3 3  6 4  5 5  3 6  5 7  2 8  2 9  3 10  4 11  6 a. Determine the upper and lower control limits. b.
asked by Johnny 
IT 205
Highlight the most important differences between objectoriented programming languages and generations 14 of (often called top down or structured) programming languages. How are they similar?
asked by Adebayo 
World Geography
I need an acronym to remember the Canadian provinces. Any help?
asked by Amy 
statistics2
A textbook publisher wants to determine process control charts for the textbook height. The following table shows the first 20 samples of n=4 sample size of the production of the text. Sample  X Bar  Range 1  10.01  .01 2  9.97  .04 3  9.98  .03 4
asked by Johnny 
Chemistry
If a catalyst is introcuced to ecxellaerate decomposition of Hydrogen Peroxide with the the aid of a condenser and another bottle theat is connectect to the first. This second bottle contains displaced water(bottle of water inverted to leaving an air
asked by Lumina 
Physics
The professor gave us no background material or explanations for any of these questions. 1. A contemporary computer chip dissipates 54 watts of power on a area of 1 square cm. due to the transistors inside this area. Assuming that transistors in succeding
asked by jm 
PreCalculus
I am having a lot of problems with this linear programming problem. CAn someone help? A farmer buys two varieties of animal feed. Type A contains 9 oz. of oats and 2 oz. of corn per pound. Type B contains 5 oz of oats and 10 oz of corn per pound. The
asked by Joanie 
English
Two main positive values are expressed by the writers in Fire on the Water: to have the determination to do what’s right, despite other people’s views and beliefs, and to respect and embrace one’s heritage and native roots. These values can be
asked by Lilah 
Physics
i have a graph that shows the motion of a cyclist. as the velocity(m/s) goes up:1, 2, 3... the elapsed time(s) also increases, 2, 4, 6... when the velocity is on 2 the time is on 2, when the velocity is on 3 the time is on 4... the line that is drawn
asked by y912f 
history
I need help with unscrambling these letters into 2 words ecnoevprmisrirtam.only hint it has to do with canada.
asked by c 
calculus
Consider the solid obtained by rotating the region bounded by the given curves about the xaxis. y = 6 x^6 , y = 6 x , x >= 0 Find the volume V of this solid.
asked by bob 
english
i need figuartive devices from obama's speech  can sue explain her example
asked by mike 
spanish sra jmcguin
this is the assignment I'm supposed to do a draft essay on helping a high school senior with improving his grades. 3 recommendation as his friend and there explanations, along with introduction and conclusion sentences. Only one paragraph the next posting
asked by sam help please 
Math  check my answers :)
1. Find the amplitude, if it exists, and the period of y=tan 1/4È Answer: No limits in amplitude, y=tanÈ/4 period is 4pi 2.Solve x = Arctan(sqrt3) Work: Pythagorean theorem: sqrt(1^2+3)= sqrt4=2 in length. Triangle is 1, sqrt 3,2 Answer: 60° 3. In
asked by Grace 
Humanities
The style that fills the picture space with figures and uses bright colors and lots of gold is called? a. Romanesque b. Renaissance c. threedimensional d. gothic e. none of the above
asked by Marilu 
biology
Can someone explain to me how 2,3 BPG works for hemoglobin? BPG affects oxygen binding affinity by binding in a small cavity at the center axis of deoxygenated hemoglobin. In oxygenated hemoglobin, this cavity is too small to effectively accommodate
asked by jason 
Math
I need help on this problem: 8+910 I just don't understand if you do that 8+9 part first or the 910 part first Can you just tell me the steps to it? Thanks! MC
asked by mysterychicken 
Introduction to Psychology
Okay I have to do short paper on my results for a survey that I did to determine which branch of psychology I would be best suited for. My results were Behavioral: 20, Humanistic: 20, and Psychoanalytical: 17. I think my main problem is getting all of the
asked by Lauren 
English
put forward an argument for macbeth to be the next king i don't know how to do this i don't have any info please help me
asked by Numz 
Physics
Why does a pencil look broken if you hold it at an angle in a beaker of water?
asked by Nabiha 
physics
A moto of a crane is lifting a 100 kg load 20m high using 25 kj of electrical energy. calculate the efficiency
asked by naomi 
Physics
for this question the answer is 680..the answer i get is 684 please help 1. it takes you 9.5 mins to walk with an average velocity of 1.2 meters per second to the north from the bus stop to the museum entrance. what is your displacement? i did: 9.5 *
asked by y912f 
chemistry
ii) What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm
asked by candi 
Physics
sorry for reposting this but im really stuck Simpson drives his car with an Vavg of 48.0 km/h to the east. how long will it take him to drive 144 km on a straight highway? i got the answer to that as 3 hours but i cant do this: how much time would he save
asked by y912f 
Chemistry
Is there a correlation between temperature change with the changes on the molecular level? And what is it? (talking about changes in phases with melting and heating. and the temp corresponds to the time it takes for each phase to melt, vaporize, etc.) (on
asked by Kara 
trigonometry
show that 1cos^2t divided by sin^2t =TANt
asked by Craig 
Chemistry
If a catalyst is introduced to ecxellaerate decomposition of Hydrogen Peroxide with the the aid of a condenser and another bottle theat is connectect to the first. This second bottle contains displaced water(bottle of water inverted to leaving an air
asked by Lumina 
Physics
please check if these are right 1. Which of the following is the equation for average velocity? a. Vavg=delta x/delta t b. Vavg=delta t/delta x c. Vavg=delta x *delta t d. Vavg=V1Vf/2 i picked A 2. Suppose you are given a position versus time graph. the
asked by y912f 
Cultural Diversity
Post a 200 to 300word summary of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the issue, and explain why you think there is a connection. Consult the National Congress of
asked by Squirrel 
math
can someone give me proof that a negative number times a negative number is a positive number I've always been told this in like seventh grade that it is but havne't been given any proof
asked by Math 
Science
how do you read graphs showing direct variation and inverse variation??
asked by Angie 
spanish sra jmguin
Santiago, estás sacando notas malas. Primero, insisto en que tú limites tiempo con tu novia o que estudies con ella. Tu novia te puede ayudar en tus estudios. Segundo, te recomiendo que tú decidas entre tocar la guitarra o jugar para el equipo de
asked by sam help please 
English
I am trying to find out who (or which companies) own Australian channels 7,9 and 10 and also SBS. I have looked on various websites all with different anwsers. Can someone please help me find the correct answer. Thanks.
asked by Nat 
science
give a details history about the evolution of man from stone age till modern age, with pictures
asked by Tosin osemeobo 
calculus
Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area S of the region. y=sqrt(x) , y=1/2 x , x=25
asked by ken 
Algebra
I am doing the amount of permutations in the word trigonometry. For the expression, I wrote 12!/2!2!2!. I got 968003200. Is this correct? If not, should I use parenthesese? Thanks
asked by Caleb 
Ladybug  Appendix C
I've removed your post because Jiskha volunteer teachers do not have access to Axia materials  such as Appendix C. I suggest you consult your instructor or other students if you want help on this assignment.
asked by Ms. Sue 
French
How would you say 'hidden talents' in French? Would it be something like "Estce que tu as des talents caches?" (With the accent, I'm on a laptop and it won't let me type it"
asked by Samantha 
math 012
Hi, I am trying to do homework for my math 012 class solving linear equations and I need help with 9 of the problems. I would really appreciate any help with this. I can do the problems and send them to you, or however you prefer. Thanks!
asked by amy 
Anatomy
What lipoprotein is associated with cholesterol and the production changes in blood vessles?
asked by Lori 
science
freshwater resource challenge
asked by fay 
Com220
When might bias not interfere with credibility?
asked by Malkia 
Macroeconomics
Would Interest on both government and corporate bonds would be included as part of interest income in determining the GNP by the income approach
asked by Jim 
Social Studies
Hi, Can you please tell me a good definition for Cultural Diffusion? I think it is the spread of culture and ideas. Is that correct, or do I need to add something. Thank You....
asked by Happy Face 
theology
what do they mean when they tell you to comment about someone's religous imagination?
asked by cathia 
math
sketch the graph of y^2=(1/4)x
asked by ben 
Math
how do you solve this: 2^3(5^06m^2)
asked by Angie 
Algebra
Why is the line x=4 a vertical line
asked by Kellly 
math
The region under the following curve is rotated about the xaxis. Find the volume of the resulting solid. y=13tan(x)^2, 0
asked by jach 
question
Are relationships better explained through staged theories or through dialectives?
asked by sally 
science245
how do fossils help in determining the relative age of strata?
asked by dianne 
4th grade
what is prime and composite 13,37,25,117208,67
asked by Paige 
Macroeconomics
How do I find depreciation does anyone know the formula thanks
asked by Alex 
Macroeconomics
Cranberry productions in Mass totaled 1.8 million barrels in 2004, 28% increase from previous year's production. This year's crop avg 127.9 barrels per acre, an increase of over 30 barrels per acre from 2003 crop. But demand increased by even more than
asked by Roberta 
english
in obama's speech ...the market can spin out of control...is this personifiation
asked by mike