Monday
October 24, 2016

# Posts by George

Total # Posts: 1,050

chemistry
we have a bag that can hold up to 775 ml. we have baking soda and 6 molar of hydrochloric acid. how can we find out how much baking soda and acid we need so that when they react, the gas will fill the bag up just enough so that it wont pop
April 10, 2012

what is the interest on \$3,400.00 per year
for twenty years
March 30, 2012

Crime scene chemistry
we don't know.
March 28, 2012

physics
A uniform electric field of magnitude 339 N/C is directed along the +y-axis. A 6.00 µC charge moves from the origin to the point (x, y) = (-40 cm, -33 cm).What is the change in potential energy associated with this charge ?
March 28, 2012

math
yes, excellent, that is correct, as well as the answer
March 28, 2012

algebra
1st part 69m @ X+5mph 2nd part 23m @ X so,69m/x+5 + 23m/x = 2hours 69/x+5 + 23/x = 2 LCD ==> 69(x)+ 23(x+5)= 2x(x+5) 69x+23x+115=2x^2+10x 92x+115=2x^2+10x 0=2x^2-82x-115 wont factor, use quadratic formula x=(-b}ã(b^2-4ac))/2a x=-(-82)}ã...
March 28, 2012

Geometry
volume of a sphere (4/3)(3.14)Radius cubed, so, 4/3*3.14*6*6*6 = 904 cubic feet of water, but, you only want it "half" full 904*1/2=452.39 cu. ft. of water
March 28, 2012

trig
100cos10=x 100sin10=y <x,y>
March 19, 2012

stuck
wouldnt it just be 16.0m/s + 5.36m/s. Because the car had to be traveling faster than the other to push it? I might be wrong though so don't think mine is perfect. What class is this for?
March 15, 2012

physics
A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 98.8 cm. If its speed is 4.60 m/s, and its mass is 0.345 kg, calculate the tension (in newtons) in the string when the ball is at the bottom of the path.
March 12, 2012

walter
A positive charge of 1.5x10^-8 C experiences a force of 0.025 N to the left in an electric field. What are the magnitude and direction of the field?
March 8, 2012

physics
A 0.180 kg baseball, traveling 32.0 m/s, strikes the catcher's mitt, which recoils 13.0 cm in bringing the ball to rest. What was the average force (in newtons) applied by the ball to the mitt?
March 7, 2012

Calculus Find max and min and saddle
Lucy I think you are wrong,what I got is much that I can't type ,mayb some social network or video call .
February 28, 2012

math
A customer is buying a \$100 drill and two \$15 drill bit sets. The customer uses a gift card worth \$50 to pay for a portion of their bill. How much cash will the customer pay (before taxes)?
February 27, 2012

AP CHEMISTRY
thanx very much!!!!!
February 15, 2012

Geometry
the answer is B. length of jane's garden is double the length of simon's garden
February 15, 2012

chemistry
A 141-mg sample was placed on a watch glass that weighed 9.203 g. What is the weight if the watch glass and sample in grams?
February 2, 2012

Math
Subtract: 7 gal 2 qt 1 pt – 5 gal 3 qt ½ pt I'm stuck plz help.
January 26, 2012

Physics
A water bed that is 1.5 m wide and 2.5 m long weighs 1055 N. Assuming the entire lower surface of the bed is in contact with the floor, what is the pressure the bed exerts on the floor? (Round to the first decimal point and don't forget units.
December 19, 2011

Physics
A cube of wood with a density of 0.780 g/cm3 is 10.0 cm on each side. When the cube is placed in water, what buoyant force acts on the wood? (ρw = 1.00 g/cm3) a. 5.00 N b. 6.40 N c. 7.65 N d. 7.65 x 10^3 N
December 19, 2011

math
a 41 inch ribbon was cut into five shorter ribbons of equal length how long was each shorter ribbon
December 7, 2011

Physics
.148 m/s
December 1, 2011

chemistry
magnesium nitrate decompses in water and releases ammonia gas. If 355ml of ammonia is produced at STP, whit is the mass of Magnesim nitrate that reacted. Equation is Mg3N2+6H2O=3Mg(OH)2+2NH3
December 1, 2011

chemistry
The radius of an atom is about 10,000 times as large as its nucleus. If the atom were enlarged such that the radius of its nucleus was 1 inch, what would be the radius of the atom in meters? I need the formula to follow so that I can solve this problem.
December 1, 2011

physics
pinecone
November 28, 2011

Math
2%, am i right?
November 2, 2011

Math
The annual interest rate on an investment is 8%. What is the quarterly rate? (a) 1% (b)12% (c) 16% (d)2% (e)3% Can someone help me figure out the formula for finding out the quarterly rate?
November 2, 2011

pre-algebra
420 -360 = 60 Answer = 60 dollars / \$60
November 2, 2011

math
Aldo invested his savings in two investment funds. The \$24, 000that he invested in Fund A returned a 1% profit. The amount that he invested in Fund B returned a 5% profit. How much did he invest in Fund B, if both funds together returned a 2% profit?
October 26, 2011

college algebra
Suppose that \$5,000 is invested in an account at an annual interest rate of 5.1% compounded continuously. How long (to the nearest tenth of a year) will it take for the investment to double in size?
October 15, 2011

Science Math
7. Calculate the difference in the lung volumes of a male athlete who is 62 inches tall and a female athlete who is 56 inches tall. Show your work. (2 points)
October 14, 2011

anaheim
a glacier moves with a speed of 54m/s. how many years wold it take for the glacier to move 0.65 km? assume there are 365 days in a year
October 14, 2011

EXP 105 Personal Dimensions of Education
Write two to three paragraphs briefly summarizing the theory and discussing at least two of the “Seven Intelligences” that apply most closely to you, providing examples to illustrate your point.
October 10, 2011

Science
I am making an essay about the conditions of our water resources and the issues concerning our water. What is a good title for the essay?
October 10, 2011

Physics
An unmarked police car traveling a constant 80 is passed by a speeder traveling 145 .Precisely 2.50 after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 1.80 , how much time passes before the police car overtakes the ...
October 4, 2011

AP Chemistry
I had this question: 3) A certain shell is known to have a total of 16 orbitals. Which shell is it? a) n = 4 b) n = 16 c) n = 8 d) n = 2 and the answer was a) n = 4.
October 2, 2011

geometry
Point T bisects RS. If R(-2,-5) and S(-14,-21), find the coordinates of point T.
September 29, 2011

A farm tractor is pulling 2 pieces of equipment east, with each piece of equipment 25 north and south of the x axis. If it takes 50,000 N of force on each chain to keep the equipment moving, then what is the total force of the tractor in the x direction?
September 26, 2011

Math
For 31 hours of work you are paid \$ 361.15. How much would you receive for 33 hours of work? (a) \$ 372.80 (b) \$ 384.45 (c) \$ 42.65 (d) \$ 11.65 (e) \$ 384.54
September 15, 2011

Math
Choices are: (a) decimal (b) sum (c) vertically (d) horizontally (e) concentrically
September 15, 2011

Math
Like fractional notation, __________ notation is used to denote a part of a whole.
September 15, 2011

Math
When multiplying decimals, the decimal point in the product is placed so that the number of decimal places in the product is equal to the __________ of the number of decimal places in the factors. (a) product (b) sum (c) vertically (d) horizontally (e) and
September 14, 2011

Math
When writing decimals in words, write " __________ " for the decimal spot. (a) decimal (b) sum (c) vertically (d) horizontally (e) and
September 14, 2011

Math
Brand A grape juice sells at one pint for \$1.65 and Brand B sells at 14 ounces for \$ 1.44 . Which brand has the lower unit price? (one pint is equal to 16 ounces ) (a) Brand A (b) Brand B
September 14, 2011

Math
K thanks
September 14, 2011

Math
Sandy Sanders has an hourly wage of \$ 15.00 and is paid time and one half for all overtime after 40 hours. Calculate Sandy’s gross pay for the week of August 13 for which she worked the following number of hours. Sunday: Monday: 8.5 Tuesday: 9.5 Wednesday: 6.25 Thursday: ...
September 14, 2011

Math
Ok thanks
September 14, 2011

Math
The list price of an item is \$ 78.99 and the net price is \$ 56.67 . Determine the amount of discount.
September 14, 2011

Math
Ok thanks
September 13, 2011

Math
The value of 25 coins, consisting of dimes and quarters, is \$ 3.55. How many dimes are in the collection?
September 13, 2011

Math
Ok thanks
September 13, 2011

Math
John withdrew \$ 500 out of his bank savings account. He spent \$ 50 on a radio, and 3 / 5 of what remained on gifts for his friends. How much money did John spend on gifts for his friends?
September 13, 2011

Math
The value of 25 coins, consisting of dimes and quarters, is \$ 3.55. How many dimes are in the collection?
September 13, 2011

Math
Round 0.000453 to the nearest thousandth.
September 13, 2011

Math
At 4 p.m., what part of a day has elapsed?
September 13, 2011

Math
Mrs. Hansen has 84 yards of material available to make school uniforms. Each uniform requires 3 / 4 yard of material. How many uniforms can be made?
September 13, 2011

Math - Linear algebra
Thank you, that was the answer I got too, but in a slightly different method, but I want to learn for how you figure this out, with this problem. I feel like you just you the same method but I am having a little problem with this one: "Suppose you want to make \$5 using ...
September 11, 2011

Math - Linear algebra
Cats cost \$1, dogs cost \$15, and mice cost only \$0.25. I want a herd of 100 animals, and I have \$100, so being a cat lover, it's tempting to get only cats and mice. But I also want a dog, and my cat(s) want mice to "play" with, so the numbers of dogs, cats and ...
September 11, 2011

Calculus
If cos2 theta = 1/3 and 0 is less than or equal to 2 theta and 2 theta is less than equal to pi, find cos theta
September 7, 2011

teacher aide language and other barriers
to be a teacher aide in an esl classroom you should ? (a)have an ear for language(my answer) (b)receive certifacation in esl instruction if possible (c)speak at least one other language besides english (d)have prior teacher aide experience in regular classroom
August 26, 2011

Statistics
The notion of statistical significance is frequently used in business to distinguish between true and spurious between-group differences (such as a difference between the response rates to two different promotions). Hence, when the difference between the baseline (no ...
August 20, 2011

MATH
cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems from a textbook. When ever I ask this question...
July 15, 2011

MATH
ok so I'm learning to solve problems like cos(x)=2 and sin(x)=5 I've wrapped my head around the process required to do so and I must say my brain is like @_@ mosh right now. Whenever I ask this question I never get a direct answer. I understand it's important to be...
July 13, 2011

Law and Ethics
Hi, I'm a incoming freshmen to a university. Over the summer I obtained the book that we would be using for a course. I have spent several hundred hours of self research and self teaching reading the whole entire book and solving every single problem in the book. It's ...
July 12, 2011

MATHS
Prove that one over one squared plus one over two squared plus one over three squared....... plus one over 1000 squared is smaller than two. Details please.
July 9, 2011

Computer Science - MATLAB
I guess it was skipped One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence...
July 8, 2011

Computer Science - MATLAB
One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a user input and ...
July 8, 2011

help
would he have to put it english
July 6, 2011

help
hi wanted to know if you guys could help my friend.the only thing is he justs writes in spanish
July 6, 2011

Do you guys have a tutor that specialized in computer science? I would expect that you guys would but I just wanted to make sure. I was wondering if any of the tutors knows the MATLAB programing language?
July 6, 2011

Law
for my CSE 1010 course I solved every single problem in my text book. Sense it's a electronic file I could easily publish it to the internet. My only concern is copyrights behind all of it. All work in the file is all my work, except for a few exceptions when I had to ask ...
July 5, 2011

Law and Ethics
Hi I have a question about law, like for civics and stuff... My neighbors foreclosed their house and completely destroyed their credit but saved a ton of money. I have recently got written permission from my neighbors to take some of their possessions inside that they left ...
June 23, 2011

Chem
Find [OH-] of 0.325 M (NH4)2SO4 and 0.490 M NH3
June 21, 2011

chemistry
which has a greater entropy: 300mL of hydrogen gas or 300mL of liquid hydrogen ?
June 12, 2011

chemistry
What is the IUPAC name for the following molecules: 1. CH3CH2N(CH2CH2CH3)CH2CH3 2. CH3CH2N(CH3)CH2CH3 I tried N,N-diethylpropanamine for the first one and N-methyl-3,4-ethanamine for the second one, but my instructor said they were wrong. If anyone could help me, that would be...
May 28, 2011

Physics Calculation
The weight of an apple near the surface of the earth is 1N. What is the weight of Earth in the gravitational field of the apple?
May 14, 2011

physics
i need to build a roller coaster, we can't use tubing to carry the ball so any ideas on what to use for the track? i was thinking no. 6 copper wire? i need to have 2 hills and a loop. how does this sound? 28" drop into a teardrop loop 12" high and back up hill #2...
May 13, 2011

science
i need to build a roller coaster but we can use tubing?? what can i use for a track
May 13, 2011

chemistry
SiH3- planar or pyramidal geometric shape?
May 8, 2011

College Chemistry
H2C=C=CH2 molecule is linear, what are they hybridization states of the carbon atoms? draw diagrams to show sigma and pi bonds.
May 8, 2011

Chemistry
Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day ...
April 28, 2011

Chemistry
Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day ...
April 28, 2011

Chemistry
Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Do I ...
April 27, 2011

Chemistry
Please give me the formula for measuring turbidity. I already know about the wikipedia defintion and explanation. Thanks
April 27, 2011

Chemistry
April 27, 2011

Chemistry
What is the formula for measuring turbidity?
April 27, 2011

Earth Science
My experiment was to measure the float of a tongue depressor down a river. The mins it took the tongue depressor to float from point A to B and the depth of the river on those days. The meter represnt how depth/wide that point of the river was on that day. This is the raw data...
April 25, 2011

Earth Science
How do I ocnvert meters into cubic meters? For example: measuring areas and velocity I come up with this: area 1.55m x 27.47 = 42.74 velocity 21.9/172 seconds = 0.123 area x velocity = 5.22381 How do I convert 5.22381 into cms?
April 24, 2011

Earth Science
Ms. Sue, I coverted the minutes into seconds and here is what I got: April 4 172 April 5 160 April 6 126 April 11 77 April 12 59 April 13 70
April 24, 2011

Earth Science
This is the raw data we got from the river: The mins it took the tongue depressor to float from point a to b and the depth of the river on those days. Using area x velocity, I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters April ...
April 24, 2011

Earth Science
It is 2 minutes a 52 seconds.
April 24, 2011

Earth Science
I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters 5 2:40 1.63m 6 2:06 1.7m 11 1:17 1.86m 12 :59 1.82m 13 1:10 1.8m Please help me.
April 24, 2011

Physics
i think the answer is big breasts
April 15, 2011

Math
compound and interest Using the below values please calculate the amount accumulated (future value) *Initial principal=\$2000 *Interest Rate=9% *Number of years 7 *Monthly compounding
April 13, 2011

history
What does concessions mean in the following paragraph? What were the concessions? The leader of the Czech Nazi Party, Konrad Henlein, was urged by Hitler to demand that the Czech government make concessions to the Sudeten Germans. Henlein kept the pressure on the Czechs by ...
April 12, 2011

Chemistry
I'm actually not sure how to do any of it.
April 3, 2011

Chemistry
A 50.0 mL sample of 0.12 M formic acid, HCOOH, a weak monoprotic acid, is titrated with 0.12 M NaOH. Calculate the pH at the following points in the titration. Ka of HCOOH = 1.8 multiplied by 10-4. What is the pH when 50.0 mL NaOH is added 60.0 mL NaOH is added 70.0 mL NaOH is...
April 3, 2011

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