Friday
August 1, 2014

Posts by Bob


Total # Posts: 2,412

help me please. easy
After forty years of intensive research, on school learning in the United States as well as abroad, my major conclusion is: What any person in the world can learn, almost all persons can learn, if they are provided with the appropriate prior and current conditions of learning&...

maths
How would you know that the hypotenuse is length 5? Does it have something to do with the ratio?

Science Gr 8
What are two ways in which trees are apart of the water cycle?

chemistry need help
kelvin so c

chemistry need help
i was thinking of b

chemistry need help
In general, which reaction(forward, reverse, or neither) is favored if the value of K at a specified temperature is a. equal to 1? b. very small c. very large

chemistry
sorry i mixed the post with another student but i figure you can help me with one like this

chemistry
would the compound BaSO4 soluble in water as well

chemistry
6.08 moles of HCL

chemistry
is this the correct answer 6.27 g HCl

chemistry
What mass of HCL is contained in 645 mL of 0.266 M solution?

physics torque and shelf
Here's a diagram scriblink (com)/index.jsp?act=phome&roomid=4431&KEY=6AA34A2C2179E9CC6FDC240F66D3F371

physics torque and shelf
Here's a diagram scriblink (com)/index.jsp?act=phome&roomid=4431&KEY=6AA34A2C2179E9CC6FDC240F66D3F371

chemistry
If 20 g KCl is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

history
Did all Southerners fight to protect slavery?

history
i have another question

history
so General George Mead

history
no

history
General Joseph Hooker, with General George Mead

history
General George E. Lee

history
Who led the Union troops at Gettysburg?

waves and sound
12

physics
The Weistin Stamford Hotel in Detroit is 228 m tall. Suppose a piece of ice which initially has a temperature of o degrees celcius falls from the hotel roof and crashes to the ground. Assuming that 50% of the ices mechanical energy during the fall and collision is absorbed by ...

critical thinking
does it actually say "crime rates" or "violent crime rates" and are these numbers for the USA only?

math
140*p = 28 p = 28/140

Pre-Algebra [repost]
y=4/3x-2 m=4/3=slope (0,-2) up 4 over 3 = (3,2) (3,2) up 4 over 3 = (6,6) (6,6) up 4 over 3 = (9,10)

math
Does 17*5=85? If so, the answer is a. If not, the answer is b.

Physics
(1) 45 micro coulombs of charge is passed through a wire in 35 seconds. How many electrons does this represent? What is the current in the wire? (2) A piece of copper wire has a resistance of 5 Ohms at 20 degrees celsius. If another piece of copper wire at 0 degrees celsius is...

Math
go hereswagbucks /?cmd=sb-register&rb=208582

6th grade
There are four possible outcomes: HH HT TH TT 1 out of those four outcomes is the case where both coins land heads up. Therefore, p=1/4=25%

Algebra
The only thing that can be factored out is 3x because that's what all of the terms have in common - they're multiples of 3x. So the answer is: 3x(5x^3 - 6x^2 + 7x - 3)

math 117
0.40x

Boiling point (DrBob)
delta T = Kim delta T = the change in boiling (or freezing) point (in degrees Celsius) K= boiling point elevation (or depression) constant for the solvent i = number of ions into which the solute dissociates m = molality (moles solute / kg solvent)

Science
Fly swatters

6th grade
i like nothing but gay

6th grade
gay

Science
Rabbits, gophers, mice, prairie dogs, rats, squirrels, antelope, goats, sheep, dead cattle, dead deer, and elk.

Science
Coyote food

math pre algebra
The slope of y=5x-6 is 5 because y goes up by 5 when x goes up by 1. The slope of y=7/2x+5 is 7/2 because y goes up by 7/2 (or 3.5) when x goes up by 1.

would richard nixon be the best president
would richard nixon be the best president if it weren't for the watergate scandal?

unit rate
88students for 4 classes find the unit rate

Math
u cant answer this ? because u dont hav enough info u need to no the total time u were driving ps did u write the ? down correctly

Business stats
I have just started business school and am struggling with this HW problem. any help would be great!!...A certain type of new business succeeds 60% of the time. Suppose that 3 such businesses open (where they do not compete so its reasonable to believe that their relative succ...

Accounting
How would the 5-question method in accounting ethics be useful?

Buffer Solutions
A buffered solution is made by adding 75.0g sodium acetate to 500.0 mL of a .64 M solution of acetic acid. What is the pH of the final solution? (Ka for acetic acid, CH3COOH, is 1.8 x 10^-5)

computers
SAM Training 2003. We have this program at school and I wanted to reatke the exam. I can log in but not access the actual training. Is there any way of going around it?

Math - Trig
I need to find the solutions in the interval [0, 2pi for: 2sinx + cosx = 0 Im trying to get it where I can split two things up and set them equal to zero but that can only be done when they are being multiplied to each other, but as you can see they are being added, so they ca...

Edit
The Directions should be: "Find a power SERIES whose sum is:"

Pre-Cal
FIND A POWER WHOSE SUM IS: (a) 5 / (1-3x) (b) 9 / (1-4x) (c) 6 / (2-4x)

Algebra
-(3x^2-5y) / (x(x+y))

chemistry 106
a roll of aluminum has a mass of 1.08kg. what is its mass in pounds? (1 lb= 435.6g)

calc
Find x. Supplementary angles with measures 10x+7 and 7x+3. Complementary angles with measures 3x-5 and 6x-40.

Math
How many corners are there on a solid pyramid?

social studies
louisiana purchase

algebra
Y = 19/28

algebra
{2y =8x+6 9x+3y=21

Algebra
non of these are right

Physics
A 2 cm object is placed 42 cm from a screen. Where should a converging lens of focal length 7 cm be placed between them to form a clear image on the screen? What two possible magnifications could the image have? ------------------------------------------------------------ 1/do...

Any
Make a list of your interests and pick which one is your main interest. This will make the research more enjoyable and make it much easier to write a long paper about it.

Economics
If utility is U(x,y) = xy + y, what is the indirect utility function and expenditure function?

math
Why couldn't the two elephants go swimming together?

Chemistry
A .405 g sample of gas contains .0050 moles. What is the molar mass of this gas? Please round your answer to the tenths place. I am confused by this. Molar mass = mass of sample/moles of sample The answer is either: molar mass = .405g/.0050 = 81 g/mol (I dividing mass by moles...

Chemistry
A 0.1300 g iron ore sample was dissolved in hydrochloric acid and the iron was obtained as Fe2+(aq). The iron solution was titrated with Ce4+ solution according to the balanced chemical reaction shown below. After calculation, it was found that 0.0259 g of iron from the ore re...

math
5/6=30/x You can see that 5 was multiplied by 6 to get 30. In order to keep the fraction the same, you'll also have to multiply the 6 in the denominator by 6 to get 36 as your value for x, which in this case represents the height of the tree in feet.

chem
Why do we use excess reactants in a chemical reaction? Why are percent yields usually less than 100%? Is it because we want to maximize the amount of products produced, and reactions usually end up in a loss of reactants to the air, etc?

Math
(2/9)(4/8)=1/9 ( Remember that when you take a marble out, the total goes from 9 to 8 )

math
You open the book to page 24 and 25. (They have to be consecutive integers like the pages in a book). 24*25=600.

math
You open the book to page 24 and 25. (They have to be consecutive integers like the pages in a book). 24*25=600.

Chemistry
An iron ore sample was dissolved in hydrochloric acid and the iron was obtained as Fe2+(aq). The iron solution was titrated with 38.54 mL of 0.471 M Ce4+ solution according to the balanced chemical equation below. Ce4+(aq) + Fe2+(aq) -> Ce3+(aq) + Fe3+(aq). Calculate the ma...

math6
how do you know????????????????

math6
whats between 2 1/2 & 3 next questioned whats beetween 3 1/2 & 4

math6
whats between 2 & 2 1/2

Math
asdfghjkllqwertyuiopzxcvbnm

physics
55555577657374383284894270000000 N

Chem
Determine the number of moles of N atoms in 43.5 g of Mg(NO3)2. Textbook answer: 1.43 mol N My answer: 43.5 g Mg(NO3)x x (1 mol Mg(NO3)2/148.313 g Mg(NO3)2) x (2 mol N/1 mol Mg(NO3)2) = .293 Can tell me where i went wrong?

Another Chem Problem
Alright, now I am starting to understand. Thanks!

Another Chem Problem
Calculate the total number of F (Fluorine) atoms in 12.15 mol C2HBrClF3. The answer is 2.195 x 10^25 atoms, but I am not sure how they got there. Can anyone give me a hint how to get started? If needed (i'm not sure), the moleculatr mass of C2HBrClF3 is 197.381.

Chemistry
Calculate the total number of atoms in 0.00102 mol CH3(CH2)4CH2OH The answer in the back of my book says 1.29 x 10^22 but i do not understand how they got to that answer. Will someone please show me how they would set up the problem. I though all you had to do was calculate 0....

Math pizzazz worksheet answers
0mmmmmmmmmmmm

Operations Management
The maintenance department of a hospital uses 816 cases of liquid cleanser annually. Ordering costs are $12, carrying costs are $4 per case a year, and the new price schedule indicates that orders of less than 50 cases will cost $20 per case, 50 to 79 cases will cost $18 per c...

Math/ Algebra
That is the Pythagorean theorem, which states that: in any right triangle, the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares whose sides are the two legs.

Math/ Algebra
Then that should be your answer

Math/ Algebra
Are you solving for anything? You can rewrite that as: b^2/[(6a^5)(c^3)]

math
Is the second part of that 3^(-2c) or 3^(-2)c?

6th grade Math
Thanks Ms. Sue, you help everyone on everything, your a big help!

6th grade Math
I don't get this question, can someone please explain it, thanks. Heres the question: A lighthouse beacon can be seen 24 mi in all directions. What is the area over which the beacon can be seen? - I think it's circumfrence, but I don't really know what to do. Thank...

physics
A flight attendent pulls her 78.6 N flight bag a distance of 344 m along a level airport floor at a constant velocity. The force she exerts is 44.8 N at an angle of 64.2 degrees above the horizontal. Find the coefficient of kinetic friction between the flight bag and the floor...

math ws
Hey

Chemistry: Molarity
4.82 mL of a 0.262 M NaOH solution reacts completly with 4.79 mL of HCl solution according to the balanced chemical reaction shown below: HCl (aq) + NaOH (aq) -> NaCl*aq) + H2O (I) What is the molarity of the HCl solution? 4.82 x (1L/1000 mL) = .00482L 4.79 x (1L/1000 mL) =...

Chemistry
Alright, I see my error. I appreciate the help :)

Chemistry
Aren't you looking for the molarity in this equation. If so, the molarity equation is M = moles of solute / Liters of Solution

Chemistry
Use the dilution relationship (Mi x Vi = Mf x Vf) to calculate the volume of 0.500 M NaOH needed to prepare 500 mL of .250 M NaOH. This is my work ? L Solution = 500mL x (1L/1000mL) = .500L ? mol NaOH = .500 L Solution x (0.250 M NaOH/1 L Solution) = .125 mol NaOH ? L solution...

3rd grade math
the greens family they had 8 people plus 2 they r going to disenyland they have $3.40 and each person cost 38 cents will they hav enough money to go to thier destionation please explain

physics
A mass of .50 kg attached to a vertical spring stretches the spring 37 cm from its original position. The accel of gravity is 9.81 m/s2. What is the spring constant?? Answer in units of N/m

biology
a fatty acids is most closely associated with what?

6th grade Social Studies
Thanks.

6th grade Social Studies
Well, This is my box's [ ] [O] [ ] [ ] [S] [ ] I don't think its frozen. ~Thanks

6th grade Social Studies
Crossword- 3 DOWN The most common type of land in Russia. 6 (Six) boxs.

Physics
You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.15 m. a) determine frequency of these water waves in units of Hz?? b) determine the period of these water waves in units of s. ?? c) determine the speed of these wate...

Physics
When these two spheres come in contact, the stronger forces of repulsion on the second sphere will move two electrons onto the first sphere. When this occurs, the electrical forces will be in balance and there will be no further net movement of electrons.

Pages: <<Prev | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | Next>>

Search
Members