Tuesday

November 24, 2015
Total # Posts: 771

**Chemistry hard 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...
*January 7, 2010*

**HIS125**

The political changes that are faced by city culture is when political funding for housing and food that aid people in lower income is cut and the area is considered poverty level
*January 6, 2010*

**college**

a 200 L electric water heater uses 15 kW of electric power. If the herter is 90% efficient, how long does it take to heat the water in the tank from 16 C to 61 C?
*December 17, 2009*

**math**

make up a list of 7 numbers having the following landmarks: mode: 21, median: 24, maximum: 35, range: 20
*December 13, 2009*

**math**

Explain why the scratch arithmetic algorithm works.
*December 13, 2009*

**Math**

Explain whether the set (0,1,2) is closed with respect to additon on whole numbers
*December 13, 2009*

**social studies **

We had our picnic near the capital of this new nation, which used to be the eastern part of Czechoslovakia..
*December 11, 2009*

**math**

5+7=12
*December 7, 2009*

**5th grade**

check out refrence book i had the same problem
*November 22, 2009*

**free casino games**

none
*November 21, 2009*

**math**

write an equation that satisifies the given conditions: perpendicular to y=-3x+7 through (3,5)
*November 19, 2009*

**Physics**

Need help ASAP for this one, really hard. to Assignment 11Problem 13.26 Tuning Forks in Neurology Tuning forks are used in the diagnosis of nervous afflictions known as large-fiber polyneuropathies, which are often manifested in the form of reduced sensitivity to vibrations. ...
*November 19, 2009*

**Calculus**

Thank you so much.
*November 10, 2009*

**Calculus**

The temperature of a cup of Starbucks coffee at time t (in minutes) is T(t)= 70 + c e^(-kt) . Initially, the temperature of the coffee was 200 degrees F. Three minutes later, it was 180 degrees. When will the temperature of the coffee be 150 degrees F? The back of the book ...
*November 10, 2009*

**Physics**

When land ice on Antarctica melts and flows into the sea, eventually it circulates and therefore distributes uniformly over the earth's oceans. As a result, does the earth's rotational speed increase, decrease or remain unaffected? (If it does have an effect, how does ...
*October 26, 2009*

**Physics**

You are a passenger on a jetliner that is flying at a constant velocity. You get up from you seat and walk toward the front of the plane. As, a result, your forward momentum increases. What (if anything) happens to the forward momentum of the plane?
*October 26, 2009*

**Physics**

A baseball player hits a home run that just barely clears the 12m high fence in right field, 94m from home plate. If the ball was at a height of 1m when hit, and its initial path after it left the bat was at an angle of 35 degrees above the horizontal, what was the ball's ...
*October 19, 2009*

**Physics**

A soccer player kicks a ball from the ground into the goal, which is located 17 meters away on the level playing field. The ball leaves the ground at an initial speed of 18m/s and at an initial angle above the horizontal of 23 degrees. Find the angle of the ball's velocity...
*October 19, 2009*

**Physics**

A projectile is launched with an initial velocity of 268 m/s, at an angle of 45 degrees above the horizontal. At a certain point, A, in its motion, its velocity angle is 17 degrees above the horizontal. At another point, B, later in its motion, its velocity angle is 30 degrees...
*October 19, 2009*

**Physics**

A baseball player hits a home run that just barely clears the 12m high fence in right field, 94m from home plate. If the ball was at a height of 1m when hit, and its initial path after it left the bat was at an angle of 35 degrees above the horizontal, what was the ball's ...
*October 19, 2009*

**Physics**

You lose your footing and slide of of your roof. Fortunately, you have placed a safety net whose center is positioned at a horizontal distance of 4.15m, measured from a point directly below the edge of the roof- and indeed you land in the center of the net. If the roof slopes ...
*October 19, 2009*

**albgrea**

my sister is 14 years older than i am. the sum of our ages is 50. find our ages
*October 15, 2009*

**Physics**

You're lying on a beach. Some distance away, across level ground, is a tall coconut palm. As you watch, a monkey in that tree drops a coconut (from rest) onto hard ground below. The time elapsed from the moment he releases the coconut until it hits the pavement is three ...
*October 12, 2009*

**physics**

Two persons start at the same place and walk around a circular lake in opposite directions. One has an angular speed of (1.40 x 10^-3) rad/sec. The other has an angular speed of (3.70 x 10^-3) rad/sec. How long (how much time) will it be before they meet?
*October 12, 2009*

**Physics**

A stone, initially at rest, is dropped from the top of a building. On its way down, it passes a window that is 2.52m tall. It takes 0.134 seconds to pass the window. From how far above the top of the window was the stone dropped?
*October 12, 2009*

**amer gov**

Choose the poll results for your state. Research and take notes on the polls and the data provided. Then, write down ten results from the polls that indicate something interesting about the relative strength of the parties.
*October 11, 2009*

**Physics**

A disc of radius 50.0cm is rotating at 120 rpm, and its angular acceleration is 3.00 rad/s^2. Find the magnitudes of the velocity, v, and tangential acceleration, a, of its outer edge.
*October 9, 2009*

**Math**

Solve this system of simultaneous equations in order to express V in terms of Vo, x, and a (but not t). x=Vot+(1/2)at^2 v=Vo+at
*October 5, 2009*

**Math**

Solve for t: y=vt+(1/2)gt^2
*October 5, 2009*

**math/physics**

A child is swinging at the end of a 3m rope. When the rope makes a 30 degree angle with the vertical, how high is she above her path's lowest point?
*October 5, 2009*

**math (challenging)**

It is possible to use a guess and check method to acquire this result. Not typically associated with math past algebra 1, but a very useful method in finding a result.
*September 30, 2009*

**History**

What are the two major functions of the Office of Management and Budget?
*September 28, 2009*

**algebra**

847
*September 20, 2009*

**Math thanks, Reiny**

John can run six miles per hour and Bill can run four miles per hour. If they run in opposite directions for two hours, then how far apart will they be?
*September 19, 2009*

**maths**

using the numbers 3,5, 7, only once how do you get the answer 61 ?
*September 7, 2009*

**physics**

The downward force from the weight of the drop is mg, where m is the mass of the drop and g is the acceleration due to gravity. This must be balanced by the upward force from the field. Let's say that the total charge on the drop is Q Coulombs, then 11000Q is the force ...
*September 3, 2009*

**chemistry**

If a graduated cylinder wasn't calicrated correctly, how would that affect the results of a measurment?
*September 1, 2009*

**chemistry**

hi can someone please help me I need a detailed scientific article about ozone depletion thank you
*August 11, 2009*

**math...number sequence**

y=2x-2 y=next number x=lastest number
*June 29, 2009*

**math**

Xavier worked 10 hours on Monday and 15 hours on Wednesday. His total pay was $280.00. What is his rate per hour?
*June 15, 2009*

**American Gov**

Choose the poll results for your state. Research and take notes on the polls and the data provided. Then, write down ten results from the polls that indicate something interesting about the relative strength of the parties.
*May 19, 2009*

**Grammar**

a d c
*May 8, 2009*

**chemistry**

STEP 1: STOICHIOMETRY to find moles C2H3O2- formed and HC2H3O2 remaining. All NaOH was used up, so that's how many moles reacted with the HC2H3O2 and also how many moles C2H3O2- formed. STEP 2: EQUILIBRIUM of HC2H3O2 with H+ and C2H3O2-. Change the moles of HC2H3O2 and ...
*April 29, 2009*

**Chemistry**

By the way, PV/T = PV/T is just another way of expressing PV=nRT. PV/T = PV/T just equates an initial state to a final state, showing that the overall proportions will remain the same even after some variables have changed. The amount of gas (n) is assumed to be constant, ...
*April 29, 2009*

**Chemistry**

This problem deals with Pressure, Volume, and Temperature. Sounds like a PV/T=PV/T problem. The reason you don't know pressure is - That's what you're solving for! The thing you're solving for must always be included in the equation that you use to solve for it.
*April 29, 2009*

**Science**

compound: (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
*April 29, 2009*

**math**

Roots are considered exponents. Example: x^(1/2) = sqrt(x)
*April 29, 2009*

**math**

Mnemonic: "Please Excuse My Dear Aunt Sally"
*April 29, 2009*

**math**

ORDER OF OPERATIONS: P.E.M.D.A.S. Parenthesis Exponents Multiplication Division Addition Subtraction
*April 29, 2009*

**Alg 2/trig**

Q2 Q1 Q3 Q4 S.....A T.....C "All Students Take Calculus" A = All things in Q1 are positive S = Sine (and cosecant) are positive in Q2 [since it's above the x-axis] T = Tangent (and cotangent) are positive in Q3 [since it's sin/cos and both sin and cos are ...
*April 29, 2009*

**middle school math**

Is this a right triangle? If so, the other angle would be 55 since 35+55+90 = 180, which is always the sum of the angles in a triangle.
*April 29, 2009*

**math**

If it were y=3/2x-6, the slope would be 3/2. Without the x, it would just be a horizontal line at y=-4.5
*April 29, 2009*

**math**

There is no slope because there is no x.
*April 29, 2009*

**Math**

ADDING AND SUBTRACTING: Need a common denominator DIVIDING: Multiply the numerator fraction by the inverse of the denominator fraction
*April 29, 2009*

**5th grade**

what diffrent things are found in the front of a book??
*April 28, 2009*

**Law**

Which one of the following is an example of a leading question? A. What time did you administer the medication? B. How long have you worked at West End Hospital? C. Did you see Dr. Martin in the patient’s room on the morning in question? D. Isn’t it true that you ...
*April 18, 2009*

**History of English Economics**

I'm trying to figure out what Gregory King's "A Scheme of the Income and Expenses of the Several Families of England" (1688) tells us about the time period. I cannot make sense of the number and was wondering if someone could help me by explaining what this ...
*April 15, 2009*

**English History**

I've tried that one already unfortunately...haha...none of them really explain what it is telling the reader...I'm just trying to make sense of what the table means...I'm sorry for being so picky...I'm just flippin out because I can't figure the stupid ...
*April 14, 2009*

**English History**

Ok so I need to explain in class tomorrow for my History of England Class in college Gregory King's "A Scheme of the Income and Expenses of the Several Families of England." Can anyone explain the significance of this and what all those numbers tell us about ...
*April 14, 2009*

**History**

Well a lot of the problems with war are centered around religion...like israel vs. palistine (Jews vs. Muslims) and Israel vs. Iran (once again Jews vs. Muslims) And also forms of govt...Ex. Capitalism/democracy vs. Totalitarian govt. (fascism/communism) It seems to me that ...
*April 14, 2009*

**PHYSICS**

(#1) If two pith balls - one which is neutral and another which has a charge of -9.6 uC (micro-Coulombs) - are touched together, how many extra electrons will each ball have? (#2) Charge q1 = 6 uC is at the origin, charge q2 = 7 uC is at y = 2m, x = 0, charge q3 = 1.5 uC is at...
*April 8, 2009*

**Games**

Please help unscramble ssppoy
*April 1, 2009*

**macroeconomics**

Suppose you were borrowing money to buy a car. Which of these situations would you prefer:The interest rate on your car loan is 20 percent and the inflation rate is 19 percent or the interest rate on your car loan is 5 percent and the inflation rate is 2 percent? explain
*March 18, 2009*

**math**

Ron bought goods from shelly katz. On may 8, shelly gave ron a time extension on his bill by accepting a $3000, 8%, 180 day note. On august 16, shelly discounted the note at Roseville bank at 9% what proceeds does shelly rerceive?
*March 15, 2009*

**math**

on may 12, Scott accepted an $8000, 12%, 90 day note for a time extension of a bill for goods bought by ron. On june 12, scott discounted the note at able bank at 10% What proceeds does scott receive
*March 15, 2009*

**english**

hello:)For next week I can choose a text(ca.10 pages)and I need to think of some assignments my friends students can do with the text.It has to last for 45 - 60 minutes.So, my job is only to stand in front of the class and give them this text and say what they have to do with ...
*March 12, 2009*

**ap calculus**

Oh...thanks Reiny, I threw it into my calculator wrong (forgot the parenthesis at teh beginning of the function)
*March 10, 2009*

**ap calculus**

Find the volume if the region enclosing y=1+ sqrerootof x, x=0, y=0, and x=9 is rotated about the x axis. I used the disk method and came up with the integral: pi integral (from 0-9) of (1+sqrerootx)^2 dx, but my answer was wrong.
*March 10, 2009*

**social studies**

The Hawaiian queen was tossed in jail at the time by the self proclaimed governor.
*March 10, 2009*

**english**

couldnt find one
*March 5, 2009*

**english**

Can someone give me an example of a metaphor
*March 5, 2009*

**physics**

im still confused
*February 10, 2009*

**physics**

hi can someone please help me with this question. The SST Concorde flies at a speed of Mach 1.5. What is the half-angle of the conical shock wave formed by the Concorde at this speed?
*February 10, 2009*

**history**

hi i need information to write an essay on the united states policy towards indians in the years following the civil war
*February 8, 2009*

**english**

ok I am sorry but I can't even find a quote that works from civil disobedience to help me
*February 8, 2009*

**english**

why would he have viewed the iraq war as such. I need to use exampels from his essay civil disobedience
*February 8, 2009*

**english**

how would henry david thoreau react to the issues of abortion and the iraq war please help me thank you
*February 8, 2009*

**Algebra 2**

Okay I have : a ball is thrown with an initial velocity of 40 ft/second from a height of 4 feet. h(t)=-16t+40t+4 a) what is the highest point reached by the ball? b) at what time will the ball reach the highest point?
*February 4, 2009*

**Personal Finance**

Bernie and Pam Britten are a young married couple beginning careers and establishing a household. They will each make about $50,000 next year and will have accumulated about $40,000 to invest. They now rent an apartment but are considering purchasing a condominium for $100,000...
*January 15, 2009*

**us history**

Hi i need help explaining how one of the main reasons behind early united states imperialism is spreading democracy. I need a lot of information so I need a lot of help.
*January 13, 2009*

**Calculus**

find the integral of x^2 - sec3xtan3x
*January 12, 2009*

**math**

Range=12-3=9 Mean=(12+6+7+3+10)/5=7.6 Mean Deviation=[(12-7.6)+(7.6-6)+(7.6-7)+(7.6-3)+(10-7.6)]/5 = 13.6/5=2.72 Standard Deviation=sqrt=[(12-7.6)^2(7.6-6)^2+(7.6-7)^2+(7.6-3)^2+(10-7.6)^2]/(5-1)=sqrt[19.36+2.56+0.36+21.16+ 5.76]/4=sqrt[12.3]=3.51
*January 9, 2009*

**calculus ab**

What is the integral of sin4xcos4x dx?
*January 8, 2009*

**physics**

race car travels on racetrack at 38m/s and slowa at a constant rate of 20m/s over 10s how far does it move during this time
*January 3, 2009*

**bio**

I did a DNA fingerprinting lab and I can't understand some of the questions. 1) Different restriction enzymes are isolated from different types of bacteria. What advantage do you think bacteria gain by having restriction enzymes? 2)In your lab, you ran your DNA samples on ...
*December 21, 2008*

**english**

are there any others
*December 21, 2008*

**english**

what are some short stories or books about hostage situations
*December 21, 2008*

**physics**

HI. Can someone please help me with this question. Two identical cars hit each other and lock bumpers. In each of the following cases, what are the speeds of the cars immediately after coupling bumpers? (a) A car moving with a speed of 90 km/h approaches a stationary car; (b) ...
*December 18, 2008*

**history**

sorry but none of those websites really give any achievements
*December 15, 2008*

**history**

what werer some achievements of post civil war reconstruction
*December 15, 2008*

**biology**

it has recently been shown that UGA specifies tryptophan and CUA codes for threonine in the mitochondrial translation system of yeasts and hamsters. A. what do these codons usually specifiy B. Comment on the significane of these minor departures from the code Can someone ...
*December 9, 2008*

**spelling paragraph**

I need to write a paragraph using the following words, acculturation,affable, aggrandize, approbation, callow, erudite, expedite, hackneyed, innuendo, inscrutable, intercede, peculate, querulous, remonstrate, repudiate, resilient, sedulous, tenuous Could you help me with this?
*December 7, 2008*

**social studies**

really but how should it be amended
*November 17, 2008*

**social studies**

i believe that he believed that the first amendmenet should be changed but i don't which parts of the amendment
*November 17, 2008*

**social studies**

IN what way did charles G Finney believe the first amendment clasue about the free practice of religion be amended thank you
*November 17, 2008*

**history**

thank you for that. I can write an essay but i just need a stance. Can you please. I am begging you can you give me the stance
*November 17, 2008*

**history**

yeah i don't know what to write for 5 pages but I also don't know which side to prove
*November 17, 2008*

**history**

sorry but can you please just answer it
*November 17, 2008*

**history**

Hi. I know i asked this already but can someone please please just give me a straight answer. I have to write a 5 page paper on wheter or not charles G. Finney believed that the first amendment's clause about the free practice of religion be amended in any way Thank you ...
*November 17, 2008*

**history**

i don't know but can you tell me wheter he advocated change or not
*November 17, 2008*