Questions Asked on
November 5, 2006

Physics
Calculate the height that a block of ice at 0°C must be dropped to completely melt upon impact. Assume that all of the initial gravitational potential energy of the block goes into melting the ice. Hmmmm. http://www.jiskha.com/display.cgi?id=1162768243
asked by Jennifer 
physics
I have a question involving the spring costant: A 2kg block is attached to a horizontal ideal spring with a spring constant of 200N/m. When the spring has its equilibrium length the block is given a speed of 5 m/s. What is the maximum elongation of the
asked by Diane 
Physics
divide both sides of the equation by mass, it divides out. mass*HeatFusion=mass*gh How do you calculate the height that a block of ice at 0°C must be dropped to completely melt upon impact. Assume that all of the initial gravitational potential energy of
asked by bobpursley 
Physics (please check)
A 6.0kg block is released from rest 80m above the ground. When it has fallen 60m its kinetic energy is: I got 1200J as my answer mgh=(6.0*9.81* 60m)=3531.6 PE + KE= (ME + KE) 3531.6 + KE= (6.0*9.81*80m) KE= 1177.2 is that right A 6.0 Kg block is thrown up
asked by susane 
Economics
If the government wishes to increase the level of real GDP, it might reduce: a. taxes b. transfer payments c. the size of the budget deficit d. its purchases of goods and services
asked by Amy 
physics
I had wrote that was because I was told that in the beginning of the spring being wound the PE=KE. Can I check a concept question, The amount of work required to stop a moving object would be equal to the mass of the object times it intial speed due to
asked by tatiana 
Science
Chemistry: What is the general formula for a chemical reaction? reactants >> products
asked by Kaitlin 
geometric mean
The geometric mean of two postitive numbers a and b is sqrt(ab). Show that for f(x) = 1/x on any interval [a,b] of positive numbers, the value of c in the conclusion of the mean value theorem is c = sqrt(ab) I have no idea how to do this! If the mean of a
asked by Jen 
another graph  complicated
Sketch the graph of a differentiable function y = f(x) with the following properties. f(2) = 3, f'(2) = 0, and (a) f'(x) > 0 for x < 2, f'(x) < 0 for x > 2 (b) f'(x) < 0 for x < 2, f'(x) > 0 for x > 2 (c) f'(x) < 0 for x not equalt to 2 (d) f'(x) > 0 for x
asked by Jen 
Economics
If a government raises its expenditures by $50 billion and at the same time levies a lumpsum tax of $50 billion, the net effect on the economy will be to: a. increase GDP by less than $50 billion b. increase GDP by more than $50 billion c. increase GDP by
asked by Amy 
science
Pls help, my assignment is to name alkalis around the home so far I have got toothpaste(bathroom), mouthwash (bathroom), indigestion tablets (bathroom), soap (bathroom & kitchen), bleach (kitchen), oven cleaner (kitchen). Can you help and think of anymore?
asked by red 
physics (please check work)
A force of 10N holds an ideals spring with 20N/m spring constant in compression. The potential energy stored in the spring is: I obtained the answer of 10J. I got thatk= F/x > the potential energy of the spring = 1/2kx^2. 10J= 1/2(20N/m)(X)^2. Is that
asked by Diane 
Energy (physics)
The wound spring of a clock would possess the same potential as kinetic energy. I am I correct in that statement. No. The wound spring has PE. Now what is this writing of KE? What is moving? how is it connected or related to the wound spring?
asked by tatiana 
Science (Forming Compounds)
Can Magnesium and Sulphur form a compound? If so, what is the chemical formul of the compound? MgS magnesium sulfide http://en.wikipedia.org/wiki/Magnesium_sulfide
asked by Bianca 
physics
have a question involving the spring costant: A 2kg block is attached to a horizontal ideal spring with a spring constant of 200N/m. When the spring has its equilibrium length the block is given a speed of 5 m/s. What is the maximum elongation of the
asked by Diane 
math 4th grade question
Rodney is 3 times as old as his sister.A year ago, he was 4 times as old. How oldare Rodney and his sister now? How do you fiqure this out? Rodney = 3*sister Rodney1 = 4*(sister 1) solve that out. Have you figured out the answer to this yet because we
asked by jennifer 
Substitution Method in Algebra!HELP PLZ!
Use the Substitution method to solve the system of equations. 3x + y = 5 4x  7y = 10 multiply first equation by 4 multiply second equation by 3 thus both equations have same x or y value in this case it is the x value. 12x + 4y = 20 12x  21y = 30 solve
asked by Matthew 
B.P.
Why does the boiling point of a twocomponent mixture rise slowly throughout a simple distillation when the boiling point differences are not that large? Thanks from Sheryl
asked by Sheryl 
economics
The less elastic a monopolistic competitor's longrun demand curve, the the greater the profitability of the firm.
asked by Anonymous 
Inequality
When I solve the inquality 2x^2  6 < 0, I get x < + or  sqrt(3) So how do I write the solution? Is it (+sqrt(3),sqrt(3)) or (infinity, sqrt(3))? Why? Thanks. So would this work? abs x < ( sqrt 3 ) or  sqrt 3
asked by Jen 
POEM
has anyone read Richard Cory? if anyone has, tell me why cory shot himself in the head. im really wondering about that. Just because you are rich and educated does not exempt you from depression. In other words happiness does not equate to wealth, beauty,
asked by Dirk 
science
volume and mass This is not a question that I can answer, or help you solve. It is clearer if you phrase your post in terms of a specific question. I searched Google under the key words "volume mass" to get these possible sources:
asked by bridgette 
literature  Don Quixote or Middlemarch
which one is better? In my opinion, for a high school student, Don Quixote reads better.
asked by math 
unique solution
How do I show that the equation x^4 + 3x + 1 = 0, 2
asked by Jen 
chemistry
How could you make the reaction Cu(NO3)2 + NaCO3  CuCo3+NaNO3 balanced? You have the formula for sodium carbonate wrong> Na2CO3 The carbonate ion is 2 valence, and Na is +1. Now it will balance.
asked by Carter 
how to sketch a graph of..
Local minimum and local maximum imply that the function approaches negative and positive infinite at opposite sides of the graph. Local minimum (1,1) and local maximum (3,3) means the slope of the function is 0 at these points. Thank you so much. So 1)when
asked by Leo 
Federalism
Which of the following cost clearly illustrates federalism? a.an absolute conarchy b.lappointing Supreme Court justices c.amending the Constitutio d.setting utility rates http://www.answers.com/federalism What do you think? Someone here will critique your
asked by m 
Life Science
Please verify that the type of transport that supplies a cell with glucose is active transport, or is it another type of transport? I know that Binary Fission and Mitosis are similar becuse they produce new cells, how are they different? If Cytokinesis
asked by Maria 
macroeconomics
State the four sections of a buisness cycle. state endogenous and exogenous conditions that affect the buisness cycle. Explain the reasons that inventories of producers are an impoertant in the growthand declinein a buisness cycle. Take a shot. Be sure
asked by Laura 
government correction
Federalism: Which of the following most clearly illustrates federalism? a.maintaining foreign embassies b.appointing Supreme Court justices c.amending the Constitution d.setting utility rates Federalism is defined as: "A system of government in which power
asked by m 
increasing and decreasing intervals
Have to find the intervals on which f(x) = 4  sqrt(x+2) is increasing. Also the intervals on which the function is decreasing. TIA Find the derivative of f(x). When the derivative is positive, the function increases as x increases. When the derivative is
asked by Jen 
eth
how do you think an average american's perceptions of each group are created? by there upbringing and family teaching Our perceptions of each ethnic group are influenced by our culture, our parents, and our own personal experiences. I suspect there's an
asked by dee 
Chemistry
Often, acetal formation is carried out directly with the help of a carbonyl and a diol under acidic conditions. a) Show two acidbase reactions that could occur in the presence of a strong acid such as ptoluenesulfonic acid. b)Draw the two resonance
asked by Lindz 
one more graph question
Hopefull the last one. :) Sketch the graph of a differentiable function y = f(x) with this property: A local minimum value that is greater than one of its local maximum values
asked by Jen 
note to JYD
For over an hour I've tried to see your final essay but Gateway keeps saying "timed out." I was able to read the responses you received but they were not perfect. I'll try tomorrow morning, but that may be too late for you. Sorry!
asked by SraJMcGin 
ReservesPLEASE HELP!
The Norfolk Bank has $18,000 in excess reservces and the reserve ratio is 20 percent. Which level of checkable deposits and reserves might this bank hold? a. $160,000 in checkabledeposit liabilities and $47,000 in reserves. b. $140,00 in checkabledeposit
asked by Amy 
Taxes on level of income
The effect of a decline in taxes on the level of income will differ somewhat from an increase in government expenditures of the same amount because: a. tax declines tend to be more expansionary b. households may not spend all of an increase in disposable
asked by Amy 
Economics
The value of the marginal propensity to save is 0.2. If real GDP increases by $50 billion, this situation was the result of an increase in the aggregate expenditures schedule of: a. $10 billion b. $15 billion c. $16 billion d. $40 billion Take a shot.
asked by Amy 
Economics
If the fullemployment budget shows a deficit of about $100 billion and the actual budget shows a deficit of about $150 billion, it can be concluded that there is: a. builtin stability b. a cyclical deficit c. an expansionary fiscal policy d. a
asked by Cris 
Econ
When government tax revenues change automatically and in a countercyclical direction over the course of the business cycle, this is an example of: a. impouding b. builtin stability c. money creation d. the fullemployment budget Take a shot.
asked by Crissy 
Economics
Actions by the Federal Government that decrease the progressivity of the tax system: a. decrease the amount of government spending b. increase the effects of automatic stabilizers c. decrease the effects of automatic stabilizers d. increase the amount of
asked by Amy 
english vocab word
can you please help me  I need a sentence using the word  cupidity I know that it means GREED...but i do not have a clear understading of the word and need please a more indepth definition of the word. An intense desire to have something...almost like a
asked by liz 
english vocab word
Hi Can I please get help in a sentence using the word philistine  It was no surprise that our philistine friend, Ken, decided to stay home and watch football instead of joining us at the symphony concert. While at the debate, his philistine girlfriend
asked by liz 
DNA
I have to build a DNA and RNA structure. It must stand on its own. What materials would you suggest i use? Thank you. http://biology.about.com/c/ht/00/07/How_DNA_Model_Candy0962932481.htm
asked by Amanda 
Microeconomics
Why MRC curve is above the labour supply curve facing the monopsonist? Why for a monopsonist MRC>W ? thanks
asked by eneri 
business management
give critical review of conflits in a company the different types of conflicts found in the company and the styles used by the management to manange the conflicts Here are some conflicts you might want to examine: 1) Leave policy for bluecollar vs
asked by zakir 
Chemistry
25.0 cm cubed of Barium hydroxide,Ba(OH)2 solution neautralises 35.0 cm cubed of aqueous hydrochloric acid of concentration 0.09 mol dm3. what is the concentration of the barium hydroxide? I like the titration equation
asked by Laura 
Physics Problem  Please Help!
Okay, here's the problem: During a football game, the quarterback rolls out to his right with two huge linebackers in close pursuit. An instant before the linebackers bury him at the 50 yard line (46m), he releases a towering pass down the sideling. The
asked by Kira 
Help!
How do you know how to write a participle? It will depend on the tense: present or past. See this link http://owl.english.purdue.edu/handouts/grammar/g_verbals.html Ok,thank you
asked by Adonia 
chem
What is the arrangement of particles for a liquid? A gas? Thanks in advance. http://en.wikipedia.org/wiki/Phase_(matter)
asked by Damien 
science
Can you tell me on the pH scale what no.s are acid and what are alkali please. I have found some info but have not yet learnt pH scale. My pH scale goes from 0 (hydrochloric acid) to 12 (ammonia). Thanks http://en.wikipedia.org/wiki/PH
asked by red again 
Physics Newton law
A 10O0Kg elevator is hoisted upward from rest by a cable. In the first two seconds there is an 1100N tension force in the cable hoisting the elevator. What is the speed after two seconds and how far has it travelled ? Get the acceleration first. Tension=mg
asked by harry 
Math
I have a fraction problem that involves borrowing and I do not know how to do this. My problem is 11 2/3  3 5/6. I know that I need to make the denominator the same so that makes it 11 4/6  3 5/6. My 11 needs to go to 10 but I do not know what changes
asked by Anna 
SCIENCE
HOW IS A GRAPH SIMILAR TO A DATA TABLE both summarize data living things?
asked by matt 
math
2t+7=1 The object is to get t alone on one side. Subtract seven from both sides. Then, divide both sides by two.
asked by bob 
maths
how do you work out exponential graphs? keshvir grade 10 south africa I depends on the problem. Do you have an example of one you need help on?
asked by keshvir 
Science
Please verify that the tyupe of transport that supplies a cell with glucose is active transport, or is it another type of transport?
asked by maria 
Science
I know that Binary Fission and Mitosis are similar becuse they produce new cells, how are they different? Thanks, Matria Since this is not my area of expertise, I searched Google under the key words "binary fission mitosis" to get these possible sources:
asked by Matria 
Science
If Cytokinesis occured without mitosis what would happen? thank you, M
asked by M 
Science
I have to think of something to do for a science fair project on nutrition. if u have any ideas that would be really cool. You need to think of ideas that interest you. Don't worry about others thinking that the idea is "cool." What nutrition topics
asked by Ashley 
spanish
What is the rule for formal commands? This site give information on Direct Commands. http://users.ipfw.edu/JEHLE/COURSES/COMMANDS.HTM This site shows the difference between commands and requests. It also gives the verb forms:
asked by T.L. 
Algebra
I'm not sure how to solve these problems. Simplify (3xsquare  2x)divided by 15x  10 Subtract (2y/xy)  5x/4y Solve (27/x) = (8  5/x) Simplify (7m^7n^4/8m) divided by (9m^2n^9/5n^2) 1) 3x^2  2x/ 15x  10 factorize both the numerator and denominator
asked by Sandra 
Math
What's the slop of the line whose equation is 87 = 7  2y? This is similar to the other one where i posted. You subtract 7 from both sides so the equation will be 80= 2y. Then divide both sides by 2, and the equation will be y=40. This is a straight
asked by Cynthia 
Math
What's the slop of the line whose equation is 8y = 7  2y? the slope would be zero. if you add '2y' to the other side, then your equation will be 10y=7. If you divide 10 on both sides, the new equation will be y=7/10. That will be a straight line, so the
asked by Cynthia 
Spanish
Hey can someone please proofread my work again? Thanks. SPANISH: La mejor decisión de mi vida fue venir a la Universidad de la Carolina del Sur de Chapel Hill para la universidad. Tomé la decisión en abril, pero la decisión no fue fácil. Cuando obtuve
asked by JYD 
ap chemistry
A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00 cm, and a piston is carefully placed on the surface of eth compound so that for all practical purposes, the distance between the
asked by sara 
Physics newton
A rocket weighs 1 x10^7 N while on the surface of the earth. The ignition of its engines results in a lift off force of 1.5 X 10^7 N a) what is the mass of the rocket. b) what is its acceleration at lift off c)How fast will it be moving if it acceleartion
asked by harry 
Linear Programming
I need help formulating a LP model to solve this question. "An investment company helps a client with 300,000 dollars to invest into 3 funds. At least 10% must be invested in a Growth and Income fund and at least 20% must be invested in a money market
asked by Andy 
English
What is a fixed essay and what is a moving essay I have never heard those terms before, and I've taught high school and college English for over 35 years. You'll need to ask your instructor for clarification. Sorry. =(
asked by Merlene 
hey...
Nowadays, what do we blame for peculiarities in the behavior of people? genetics one parent homes lack of a religious upbringing Lack of proper upbringing poor teachers No spanking at school No prayer at school Gays Satan Witches His father His mother
asked by robert! 
Science
To transmit genelogical information to other parts of the cell. What is the basic purpose of DNA?
asked by Amanda 
Math (Related Rates)
I was working on some questions for homework and for some reason cannot understand how to approach this question A camera, located 5 km from the launch pad, is tracking the rocket that is fired straight up. When the height of the rocket is 12 km, the
asked by Avik 
Math (related rates)
My question is similar to Avik's but with different values. A camera, located 4 km from the launch pad, is tracking the rocket that is fired straight up. When the height of the rocket is 13 km, the camera is rotating at the rate of 3/169 radians per
asked by Sally 
chemistry
Is melting endothermic or exothermic? Things that are melting are taking on heat, endothermic Would freezing be the same? No, of course not. If melting is endothermic, then freezing must be exothermic. Believe it or not, and I know it sounds goofy,
asked by Gemma 
Financial Management
Year Cash Flow(A) Cash Flow (B) 0 307,206 27,651 1 14,950 8,726 2 32,391 13,901 3 29,232 9,222 4 390,590 13,140 15% rate of return. what is the payback period for Period A and B.
asked by Andrea 
complex numbers
115 cis 45* 3 solutions = 120* apart Are these correct? 115 cis 45* 115 cis 45 + 120 = 165* 115 cis (45 + 120 + 120) = 285*?? WHat is cis? cos + isin OH LOL!!!Wish I could help!LOL!But...PLease help me!!:(
asked by kevin 
Slope Form!!
2x + y = 9 *You need to put it into slope form and solve for x and y!PLz help! y= 2x + 9 2,intercept: 7
asked by Natalie 
Thin Layer Chromotography
Can you use TLC to distinguish various isomers from one another? In what kind of substance can you NOT distinguish the isomers from each other? i think it is not possible to distinguish If I have an unknown sample containing several ketones and want to use
asked by Sarah 
Algebra!Problem Solving!PLZ HELP!
Sunset rents an SUV at $21.95 plus $0.23 per mile. Sunrise rents the same vehicle for $24.95 plus $0.19 per mile. For what mileage is the cost the same? This means that one cost equals the other. Let X stand for the number of miles. Thus the basic cost
asked by Matthew 
Azeotrope
I'm having trouble understanding what an azeotrope is. Any clarification is appreciated. Sheryl Two liquids with different boiling points normally can be separated by fractional distillation; i.e., the lower boiling point material boils first and when all
asked by Sheryl 
Physics
A bat flying in a cave emits a sound and receives its echo 0.9 s later. How far away is the cave wall? The distance there and back is given by distance=velocitySound*time We are not given velocity to solve for the problem. The velocity of sound is
asked by Allie 
Spanish
hey, I was just wondering if someone could proofread my spanish composition. I really appreciate it, thanks! ENGLISH:The best decision of my life was the decision to play golf throughout high school rather than conduct research over the summer. I had to
asked by PJ 
Substitution Method!PLZ HELP 2222!!
y2x=5 3yx=5 In the top equation: 1) y=2x 5 Put that in the second equation 3( ) x =5 solve for x, then put that value of x back in to 1) to solve for y. So would it be: 3(2x5)=5? would it?PLz help me bob and margie!
asked by Matthew 
Math
Can someone please help me with this? I don't know how to simplify this. 7m^7n^4/8m divided by 9m^2n^9/5n^2 Put all your m's together,all your n's togehter and then it will continue getting simplified!hopE THAT HELPS! is this correct? 16m^9n^13/40mn^2
asked by Cynthia 
CHECK!!
Robert: In the future, in the subject box, but the subject. In this case it could be English, or English, pls check Both slang and colloquialisms are acceptable when tow friends are speaking or writing to one another, but slang and colloquialisms are not
asked by bobpursley 
SPANISH!!
Hey can someone please proofread my work again? Thanks. SPANISH: La mejor decisión de mi vida fue venir a la Universidad de la Carolina del Sur de Chapel Hill para la universidad. Tomé la decisión en abril, pero la decisión no fue fácil. Cuando obtuve
asked by JYD!! 
Graph!
Choose the best description for graphing the point (3,4). Go to the left three and up four. Go to the right three and up four. Go to the right three and down four. Go to the left three and down four. Is not +3 to the right, and 4 down?
asked by margie 
biology
How does photosynthesis work? wikipedia has stuff type photosynthesis in google! or type this in google "how stuff works photosynthesis" Well,basically just go to google and search it up!LOL! Go search it on Google!
asked by Erin 
KEVIN CAN'T YOU PLEASE HELP ME!!?!?!??!?!?!?!?!
y2x=5 3yx=5 y = 5 + 2x 3yx = 5 so 3*(5 + 2x)  x = 5 15 + 6x  x = 5 15 + 5x = 5 x = 20/5 x = 4 y = 5 + 2 *4 y = 3
asked by kevin 
Help! Urgent!
You know tangentTheta=h/4 take the derivative sec^2 Theta * dTheta/dt= 1/4 dh/dt you know dtheta/dt solving for dh/dt You know sec Theta from the right triangle: sec theta = sqrt(h^2 +16) /h check me. Georgina: in the future, please put the title in the
asked by bobpursley 
complex number ~
thanks BOB =) *HUGS* 115 cis 45* 3 solutions = 120* apart Are these correct? 115 cis 45* 115 cis 45 + 120 = 165* or is it (75*) 115 cis (45 + 120 + 120) = 285*?? or (195*)?? It's really Matthew!I found out what it is but I will help you when you help me
asked by kevin 
physics
A skipper on a boat notices wave crests passing his anchor chain every 9 s. He estimates the distance between wave crests to be 15 m. He also correctly estimates the speed of the waves. What is this speed? Wavelenght* frequency= wave speed remember that
asked by Barry 
physics
A bat flying in a cave emits a sound and receives its echo 0.5 s later. How far away is the cave wall? I answered this below. If you cant find it, search on bat flying in the search window above.
asked by Barry 
physics
The homework question asks: which work woulf be required to stop a moving object: the intial speed, the intial kinetic energy of the object, the mass of the object times it acceleration, the mass of the object times its intials speed, or the square of the
asked by tatiana 
U.S. HISTORY i really need someones help!
i need to know what mary chesnut thought of patriarchy and other opinions of hers. i've looked everywhere and cant find anything, i already know her opinion of slavery tho http://www.google.com/search?hl=en&q=mary+chestnut&btnG=Google+Search Looks as if
asked by INEEDHELP!!! 
Math
Suppose that f(h)=(8+2h)^1/3 Use the linear approximation to estimate the value of f(h) for small values of h. Give your answer in terms of h. Thanks for all the help. (Sorry Bob for not stating the subject last time) d f(h) = 1/2 ((8+2h)^2/3 (2) =
asked by Georgina 
Microeconomics, hunting analysis
Overhunting can endanger a species pollution. Evaulate the likely impact and effectiveness of the following policies. 1. shorten seasons and allowable hunting hours per day 2. double commercial license fees 3. impose a tax on all kills 4. set and enforce
asked by Jack 
Math
is x=5 a function No. The plot (graph) is a vertical line at x=5, so y can have many different values, in fact, any value. a function has one y value for each x value. thanks
asked by NikkiOle 
government
Growth of Democracy "The United States intends to be and independent and selfgoverning nation" is the essential message of the a.Declaration of Independence b.Articles of Confederation c.United States Constitution or d.Bill of Rights Declaration 
asked by m 
Math  Permutations
How many different ways are there of arranging seven green and eight brown bottles in a row, so that exactly one pair of green bottles is sidebyside?
asked by y helo thar 
chemistry
Please help me with this? What are some properties of a candle? height, smell, color, .... How can I identify those when I don't know what the actual candle looks like? The question just asks for the properties of a candle. It doesn't describe it.
asked by Julie 
PSYCOLOGY QUESTIONPLZ HELP!!
FILL IN THE BLANK WITH THE APPROPRIATE RESPONSE TO THE FOLLOWING: Alisha is being treated by her doctor for a hypothyroid condition. At the same time,she is seeing a therapist, who favors the psychlogical model, for treatment of intense emotional
asked by Maranda