Saturday
October 22, 2016

# Posts by ross

Total # Posts: 80

Physics
The drawing shows a skateboarder moving at 5.71 m/s along a horizontal section of a track that is slanted upward by 49.8 ° above the horizontal at its end, which is 0.516 m above the ground. When she leaves the track, she follows the characteristic path of projectile ...
October 16, 2014

Chemistry
What volume of 0.109 M nitric acid is required to neutralise 2.50g barium hydroxide?
June 16, 2014

algebra 2
what is 7 1/5 written in radical notation
May 19, 2014

Biochem
You have prepared a 400 mL of a .210 M acetate buffer solution with a pH of 4.44. 1. Determine the concentration of both the acetate and acetic acid in the solution. 2. If you made this solution using solid sodium acetate (MW = 136 g/mol) and liquid acetic acid (17.6 M, ...
September 24, 2013

math
15*w+1.5(15)*y 15w+22.5y Week=7 days. 7(15w+22.5y) 105y+157.5y hours
July 1, 2013

Math
the larger of the two numbers is 8 more than twice the smaller. The sum of the numbers is 10 less than three time the larger. Find the numbers
March 28, 2013

math
a ball tossed to a height of 4 meters rebounds 40% of its previous height. the total distance travelled by the ball by the time it comes to rest is?
March 10, 2013

Chemistry
Where do you substitute Kc into the expression?
January 19, 2013

science
what type of a drink did not floated or sank?
September 22, 2012

maths
solve 4x/3x+1 = 3?x+5
January 18, 2012

poem
i read this book named abduction and my home work is to write a poem about it but the problem is i don't know how to write poem ?
April 10, 2011

physics
a modified U-tube: the right arm is shorter than the left arm. The open end of the right arm is height d = 10.0 cm above the laboratory bench. The radius throughout the tube is 1.60 cm. Water is gradually poured into the open end of the left arm until the water begins to flow ...
November 4, 2010

Physics
a modified U-tube: the right arm is shorter than the left arm. The open end of the right arm is height d = 10.0 cm above the laboratory bench. The radius throughout the tube is 1.60 cm. Water is gradually poured into the open end of the left arm until the water begins to flow ...
November 4, 2010

math
p = 160/21~7.62
November 4, 2010

physics
An object is dropped onto the moon (gm = 5 ft/s2). How long does it take to fall from an elevation of 250 ft.?
October 19, 2010

science
Which would be most appropriate to measure the mass of my pet panda in? a. kilograms b. centigrams c. Gigagrams d. milligrams its kilograms??????
September 20, 2010

Name the set(s) of numbers to which 1.68 belongs. a. rational numbers b. natural numbers, whole numbers, integers, rational numbers c. rational numbers, irrational numbers d. none of the above my answer a)rational numbers
September 20, 2010

math
Simplify the expression. 17 – 6 × 10 ¸ 2 + 12 a. 67 b. 59 c. –1 my answer -1 ?????
September 20, 2010

science
Evaluate the following expression when r = 2 and t = 5. (2r)^t - 2 a. 1022 b. 16 c. 64 d. 62
September 12, 2010

science
Evaluate the following expression when r = 2 and t = 5. (2r)t - 2 a. 1022 b. 16 c. 64 d. 62
September 12, 2010

1,500 workers
September 9, 2010

A computer manufacturer assembled 21,000 computers in October. For the month of November, they expect to double production. If a worker can assemble one computer per day, how many workers will be needed to complete the job in 28 days? a. 1,500 workers b. 750 workers c. 1,429 ...
September 9, 2010

math
It takes 28 minutes for a certain bacteria population to double. If there are 4,241,763 bacteria in this population at 1:00 p.m., which of the following is closest to the number of bacteria in millions at 4:30 pm on the same day?
September 9, 2010

NSU
The Omega pharmaceutical firm has five salespersons, whom the firm wants to assign to five sales regions. Given their various previous contacts, the salespersons are able to cover the regions in different amounts of time. The amount of time (days) required by each salesperson ...
August 26, 2010

Probability
1/2 Please tell me if this is correct
July 22, 2010

Probability
A number cube, numbered 1 through 6, is rolled once. What is the probability of rolling an even number that is not prime? 1/6 1/3 1/2 2/3
July 22, 2010

math
Please tell me if this is correct 1/2
July 22, 2010

math
7. A bag contains 2 red cubes, 3 blue cubes, and 5 green cubes. If a cube is removed and replaced in the bag and another is drawn, what is the probability that both are green? 1/4 3/8 2/5 1/2
July 22, 2010

math
Please tell me if this is correct 7/20
July 22, 2010

Probability
July 22, 2010

Probability
1/16 Please tell me if this is correct
July 22, 2010

Algebra
that will be 5 so you are saying that my answer is 5? I though that because it was positive my answers was going to be differents. For example I had x=-1 4x^3+8x-3x-2 and after doing all the problems my answer was 13, but the x was a negative one that was the reason I though ...
April 15, 2010

Algebra
Please help me I have been trying to get the answer and for some reason is not coming up correct can someone please help. evaluate the polynomial for x=1 3x^2-4x+6
April 15, 2010

Math
Wpw, way to post Ross problems on here.
April 15, 2010

Geometry
Planes A and B are both perpendicular to line M. What is the relationship between planes A and B?
April 12, 2010

algebra
Hint: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know that ...
March 23, 2010

algebra
Hint: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know that ...
March 23, 2010

would like to see an example of what the plan should look like to get me started.
December 5, 2009

math
Insert parentheses to make statement true 6+7x4-2=26
November 2, 2009

math
n=12 n+11=48
October 24, 2009

how would i put these words in sentences:(PLEASE HELP ME) THANK YOU! l. general 2. inaccurate 3. interpret 4. evidence 5. demonstrate 6. relevant I start my tutoring classes in two weeks. I have been reading much more which should help me.
October 18, 2009

MATH
I THINK a. 4,000 is the answer am I right
October 3, 2009

MATH
I THINK a. 4,000 is the answer am I right
October 3, 2009

MATH
hello- The question is round to the digit underlined Add or subtract? 7 is the underlined digit. 7,526-3,861. a. 4,000 b. 5,000 c. 3,000 d. not given
October 3, 2009

MATH
Find the word form 0.007 a. seven hundredths b. seven tenths c. seven thousand d. not given I selected a. seven hundredths
October 3, 2009

math
math ? FIND THE VALUE OF 5 - 35,791 a. five hundred b. five thousand c. five thousandths d. not given I selected - b. five thousand correct? or not?
October 3, 2009

Are there any websites that will help me with my division?
September 20, 2009

MATH
I DESPERATELY NEED TO KNOW HOW TO READ A PLACE VALUE CHART DEALING WITH DECIMALS IF ANYONE CAN GIVE ME AN EXAMPLE??
September 14, 2009

MATH
I DESPERATELY NEED TO KNOW HOW TO READ A PLACE VALUE CHART DEALING WITH DECIMALS IF ANYONE CAN GIVE ME AN EXAMPLE??
September 14, 2009

Math Quotations place value
Good evening, I am not sure if Ross wrote the questions for homework correctly however, I am a little confused as to the difference in hundreds place value vs. hundreths place value is there such a place value as HUNDRETHS? Would HUNDRETHS APPLY TO DECIMAL PLACE VALUE? Thanks ...
September 10, 2009

math
thanks much!!!!
May 4, 2009

math
please, does anyone know of a site I can go to online to help my son with some simple practice division? THX!!!
May 4, 2009

division
how can I learn simple division
May 4, 2009

physics
The way I solved the first part of the question was: Vo=? d=7.18 m Vf = 7.80m/s a = 9.81m/s^2 So find the initial Vo velocity using: Vf^2 - Vo^2 = 2ad Then once you get Vo, use the same equation to find the d, when Vf = 0, that's when the height is maximal. Hope that helps...
February 14, 2009

RS
How do Christians help others?
February 2, 2009

Good evening ~ I have 2 questions. Kelsey was assigned math homework. He was given 8 word problems to solve. He estimated that it would take him 5 mins. to solve each problem (THAT WOULD TAKE 40 MINS. FOR KELSEY TO COMPLETE HIS MATH HOMEWORK) ? HOW TO WRITE A MULTIPLICATION ...
December 4, 2008

Just would like to know if you have any suggestions on how I would help my son tell time better. He really struggles with this. Thankks!
December 2, 2008

thank you thank you thank you!!!
December 2, 2008

how do I write the time in three different ways for 3:50
December 2, 2008

Math
What do we call the nunmbers that cannot be arranged ito 2-row arrays
September 6, 2008

science
what is meant by an animal or plant being in the same species
June 18, 2008

chemistry
Calculate the solubility of calcium sulfate 0.010 mol/L calcium nitrate at SATP
April 7, 2008

chemistry
Calculate the pH of the following aqueous solutions: 1.00 mol/L sulfuric acid H+ = 1.00 M for the first ionization THe second one is guided by K2 K2 = (H+)(HSO4-)/(HSO4-) Plugging in K2 as follows: H+ = 1.00 + x SO4- = x HSO4= 1.00 - x Can someone please solve for x ?
April 7, 2008

chemistry
Strychnine, C21H22N2O2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The Kb of strychnine is 1.0 x 10^-6 My work: I called Strychnine SN SN + HOH --> SNH+ + OH- Kb = (SNH+)(OH-)/(SN) (SNH+) = x (OH-) =x (SN) = 0.001-x ...
April 7, 2008

chemistry
Strychnine, C21H22N2O2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The Kb of strychnine is 1.0 x 10^-6 My work: I called Strychnine SN SN + HOH --> SNH+ + OH- Kb = (SNH+)(OH-)/(SN) (SNH+) = x (OH-) =x (SN) = 0.001-x ...
April 7, 2008

chemistry
Please calculate the pH and [H+] of a 0.30 mol/L solution of butanoic acid,. The Ka of butanoic acid is 1.52 x 10^-5
April 7, 2008

chemistry
Wow , thanks you are a really excellent expert! :)
April 7, 2008

chemistry
I am still getting the wrong answer. YOu are positive this is the answer? Perhaps my computer system is wrong?
April 7, 2008

chemistry
0.003898-- this is H+? Ka = ( )(0.00398)/( ) What would be the concentration of C6H5COO- ?
April 7, 2008

chemistry
Thank you! I still have to read over it but for now I beleive I got the jist of it
April 6, 2008

chemistry
For the titration of 20.0 mL of 0.1500 mol/L NH3(aq) with 0.1500 mol/L HI(aq)(the titrant), calculate a) the pH before any HI(aq) is added b) the pH at the equivalence point
April 6, 2008

chemistry
In a titration, how many millilitres of 0.23 mol/L NaOH(aq) must be added to 11 mL of 0.18 mol/L HI(aq) to reach the equivalence point?
April 6, 2008

chemistry
To clean a clogged drain, 26 g of sodium hydroxide is added to water to make 150 mL of solution. What are the pH and pOH values for the solution?
April 6, 2008

Year 12 can't do year 7 simple math-help
i cant tell the difference .... i cant even do it and im in year 12
February 7, 2008

Algebra
3 x -x factor completely x to the third power -x
December 18, 2007

English
What is the theme of the Medusa myth?
November 6, 2007

Chemistry
I wanted to now what is the molecular geometry of SeBr4, because I believe is a trigonal bipyramid...but I am not sure...please help me.... I thought it was a see-saw shape. See http://www.stolaf.edu/depts/chemistry/mo/struc/explore.htm You can see SeF4, the shape of SeBr4 is ...
April 20, 2007

Nature
I am researching about why water is blue. I am wondering why is the water in the Caribbean bluer that that of the North Atlantic? Thank you for using the Jiskha Homework Help Forum. This is an interesting question and here are some sites to explain it: http://www.dartmouth.edu...
February 28, 2007

making dot arrays
odd numbers
August 21, 2006

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