# Posts by Bill

Total # Posts: 877

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...

Impossible chemistry 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...

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...

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

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?

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

math
Explain why the scratch arithmetic algorithm works.

Math
Explain whether the set (0,1,2) is closed with respect to additon on whole numbers

social studies
We had our picnic near the capital of this new nation, which used to be the eastern part of Czechoslovakia..

math
5+7=12

check out refrence book i had the same problem

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

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. ...

Calculus
Thank you so much.

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 ...

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 ...

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?

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 ...

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...

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...

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 ...

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 ...

albgrea
my sister is 14 years older than i am. the sum of our ages is 50. find our ages

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 ...

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?

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?

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.

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.

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

Math
Solve for t: y=vt+(1/2)gt^2

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?

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.

History
What are the two major functions of the Office of Management and Budget?

algebra
847

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?

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

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 ...

chemistry
If a graduated cylinder wasn't calicrated correctly, how would that affect the results of a measurment?

chemistry

math...number sequence
y=2x-2 y=next number x=lastest number

math
Xavier worked 10 hours on Monday and 15 hours on Wednesday. His total pay was \$280.00. What is his rate per hour?

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.

Grammar
a d c

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 ...

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, ...

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.

Science
compound: (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

math
Roots are considered exponents. Example: x^(1/2) = sqrt(x)

math
Mnemonic: "Please Excuse My Dear Aunt Sally"

math
ORDER OF OPERATIONS: P.E.M.D.A.S. Parenthesis Exponents Multiplication Division Addition Subtraction

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 ...

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.

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

math
There is no slope because there is no x.

Math
ADDING AND SUBTRACTING: Need a common denominator DIVIDING: Multiply the numerator fraction by the inverse of the denominator fraction

what diffrent things are found in the front of a book??

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 ...

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 ...

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 ...

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 ...

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 ...

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...

Games

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

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?

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

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 ...

ap calculus
Oh...thanks Reiny, I threw it into my calculator wrong (forgot the parenthesis at the beginning of the function)

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.

social studies
The Hawaiian queen was tossed in jail at the time by the self proclaimed governor.

english
couldnt find one

english
Can someone give me an example of a metaphor

physics
im still confused

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?

history
hi i need information to write an essay on the united states policy towards indians in the years following the civil war

english
ok I am sorry but I can't even find a quote that works from civil disobedience to help me

english
why would he have viewed the iraq war as such. I need to use exampels from his essay civil disobedience

english
how would henry david thoreau react to the issues of abortion and the iraq war please help me thank you

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?

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...

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.

Calculus
find the integral of x^2 - sec3xtan3x

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

calculus ab
What is the integral of sin4xcos4x dx?

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

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 ...

english
are there any others

english
what are some short stories or books about hostage situations

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) ...

history
sorry but none of those websites really give any achievements

history
what werer some achievements of post civil war reconstruction

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 ...

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?

social studies
really but how should it be amended

social studies
i believe that he believed that the first amendmenet should be changed but i don't which parts of the amendment

social studies
IN what way did charles G Finney believe the first amendment clasue about the free practice of religion be amended thank you

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

history
yeah i don't know what to write for 5 pages but I also don't know which side to prove

history

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