Saturday
December 10, 2016

# Posts by DiANA

Total # Posts: 897

chemistry
May 1, 2011

chemistry
I don;t understand this question. NaOH(aq)+H3PO4(aq)¨Na3PO4(pq)+H2O(l)
May 1, 2011

Math
I don't fully understand factorization in algebra. I've got a problem: 9x-27x^3. Can you please help me?
May 1, 2011

MATH
i would say 44 4+4 is eight. If you put 44 into groups of 7 then there would be 6 in each group. and 6*7 is 42 which means there would be 2 left over
April 28, 2011

math
Find all real solutions to the following equation: (x^2 -7x +x)^(x^2 - 2x - 35)
April 28, 2011

PHYSICS
You are driving a car down a straight road at a constant 48 miles per hour. Consider the following forces: I) air drag pushing back on the car; II) gravity pulling down on the car; III) the ground pushing up on the car; IV) friction pushing the wheels (and the car) forward; ...
April 28, 2011

Government
Can the president veto the choice of congress's salary?
April 27, 2011

Math
nice explanation, i understand
April 26, 2011

Math
consider the following linear equataion: 4x+11y=2011 How many solutions are there such that x and y are positive integer? (note the date 4/11/2011)
April 26, 2011

Finance
How much will Pauline pay in interest if she takes out a simple interest loan with a principal of \$3,900 at 7.2% for three years?
April 24, 2011

physics
A mass of 12.7 kg is hanging by a steel wire 1.02 m long and 1.12 mm in diameter. If the mass is pulled down slightly and released, what will be the frequency of the resulting oscillations? Young's modulus for steel is 2.0 1011 N/m2.
April 23, 2011

Math.
A bowl contains 8 marbles: 3 red, 2 blue, 1 white, and 2 green. If 3 marbles are randomly selected without replacement, what is the probability that no green marble is selected? I don't know how to do probability.
April 15, 2011

math/science
describe the symmetries of a water molecule.
April 13, 2011

math
let x and y be real numbers. find the area enclosed by the graph of the following equation: abs(2x)+abs(2y)=1
April 13, 2011

help(math)
Signs in a department store read, "75% off original prices when you take an extra extra 50% off already reduced prices." By what percent were original prices reduced before today's sale?
April 13, 2011

Math
lisa checks the stats for her favorite puzzle game on her Ipod. she sees that she has won exactly 72% of the 2400 puzzles that she has played. what is the minimum numbers of puzzles that lisa must win before she has won at least 73% of the total number of puzzels played. i ...
April 13, 2011

chemistry
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3?
April 8, 2011

math
Katie is on the 15th floor of a building. She throws a ball straight down from the window, which is 220 feet above the ground. How fast must she throw the ball(in feet per second) for it to hit the ground in 3 seconds?
April 7, 2011

Chemistry
I have 5.0 ml of lead II NITRATE and mix it with 20.0 ml of Sodium Iodide. what is the formula of the precipitate
March 20, 2011

calculus
A 20 ft ladder is leaning against the side of a house. If the bottom of the ladder is moving away from the house at the rate of 2 feet per second, how fast is the top of the ladder moving down the wall when the bottom of the ladder is 12 feet from the house
March 16, 2011

math
Find all the two digit prime numbers neither of whose digits are prime. Someone helped me yesterday but I do not understand.
March 15, 2011

Math
Find the smallest possible sum of six consecutive integers such that none of the integers is prime.
March 14, 2011

Math
is 48 included in the numbers you listed?
March 14, 2011

Math
okay, thank you
March 14, 2011

Math
Find all the two digit prime numbers neither of whose digits are prime.
March 14, 2011

physics : different question
Rank the automobiles based on the magnitude of the force needed to stop them, from largest to smallest. 2000 kg car going 5m/s 500 kg car going 20 m/s 1000 kg car going20m/s 500 kg car going10m/s 1000 kg car going10/s 4000 kg car going 5m/s
March 8, 2011

physics
Rank these automobiles based on the magnitude of the impulse needed to stop them, from largest to smallest. 2000 kg car going 5m/s 500 kg car going 20 m/s 1000 kg car going20m/s 500 kg car going10m/s 1000 kg car going10/s 4000 kg car going 5m/s
March 8, 2011

Does anyone know how much heat do I need to convert 95g. of ice at -25 C. to water at 30 C. the heat capacity of H2O(s) is 2.1 J/g*C.
February 28, 2011

Chem
How much heat do I need to convert 200g of liquid water at -25C to water at 30C?. The specific heat capacity of H2O(s) is 2.1 J g*C
February 28, 2011

child care managment
An apprpriate science activity for a child 6 to 12 years of age is: A. collecting leaves. B.using a compass to find specific sites. C.growing plants froom seeds. D. experimenting with magnet.
February 28, 2011

english
clutced her notebook in the other hand as though it were a flyswatter is this a similie?
February 26, 2011

english
clutced her notebook in the other hand as though it were a flyswatter
February 26, 2011

Child Care Mangment
For me, B and C, Im not sure,these concepts stimulating children's sense of wonder and motivate them to explore the surrounding world. Thats why I'm asking That's why I'm asking for help
February 24, 2011

Child Care Mangment
An apprpriate science activity for a child 6 to 12 years of age is: A. collecting leaves. B.using a compass to find specific sites. C.growing plants froom seeds. D. experimenting with magnet. Thanks
February 24, 2011

Math
Penelope bought 17 large packs and 5 small packs of identical pens. When she got home, her little sister opened all of the packages on the floor. If a total of 234 pens were on the floor, how man pens did a large pack contain?
February 18, 2011

Math
circles P and Q are externally tangent at T. Horizontal lines l and m are, respectively, tangent to circles P and Q at R and S. Show that RT must contain S.
February 18, 2011

math
f(2n)=n+f(2n-2) and f(2)=1. determine f(20)
February 18, 2011

math
Use each of the integers 1-9 exactly once in any order to write a numerical expression equal to 2011. An integer may be written as an exponent, and the operations of addition, subtraction, multiplication, and divisions as well as grouping symbols may be used.
February 18, 2011

Math
What is the probability that rolling four fair, six-sided dice produces an even sum?
February 15, 2011

SPANISH
no i meant it as rhino. the word that we use for nose.
February 15, 2011

SPANISH
if i said, un animal grande que es la palabra en ingles para nariz, would you know what animal I was talking about.
February 15, 2011

Physics
A car travels in a straight line for 5.4 h at a constant speed of 79 km/h . What is its acceleration? Answer in units of m/s2.
February 14, 2011

math
I don't get this
February 9, 2011

physics
Two identical small spheres of mass 2.0g are fastened to the ends of an insulating thread of length 0.60m The spheres are suspended by a hook in the ceiling from the centre of the thread. The spheres are given identical electric charges and hang in static equilibrium, with an ...
February 9, 2011

physics
three spheres, each with a negative charge of 4.0*10^-6 C, are fixed at the vertices of an equilateral triangle whose sides are 0.20m long. Calculate the magnitude and direction of the net force on each sphere. So far i have drawn a diagram and used the formula Fe= kq1q2/r^2 ...
February 9, 2011

physics
79515.55
February 3, 2011

math
1 time only :)
February 2, 2011

child care
1.B 2.D 3.D 4.C 5.C 6.C 7.A 8.A 9.C 10.A 11.B 12.A 13.B 14.C ,NOT SURE B, OR B. 15.A 16.D 17.C 18.A 19.B. 20.C.
February 1, 2011

I AM AN EQUIDRATERAL TRIANGLE.ONE SIDE IS 3 INCHES LONG.HOW LONG ARE MY OTHER 2 SIDES
January 31, 2011

math
the x value is negative and the y value is positive
January 31, 2011

math
A boat starts at point A, moves 3 km due north, then 2 km due east, then 1 km due south, and then 4 km due east to point B. Find the distance AB.
January 31, 2011

math
A jar contains some red and some yellow jelly beans. If a child ate 1 red jelly bean, 1/7 of the remaining candies would be red. If instead the child ate 5 yellow jelly beans, 1/6 of the remaining candies would be red
January 28, 2011

MATH
two sides of a triangle measure 8 and 15. how many integer values can be assigned to the third side so that all the angles in the triangle are acute.
January 28, 2011

math(HELP)
A jar contains some red and some yellow jelly beans. If a child ate 1 red jelly bean, 1/7 of the remaining candies would be red. If instead the child ate 5 yellow jelly beans, 1/6 of the remaining candies would be red.
January 28, 2011

math(HELP)
Show that number N! can terminate in exactly 1,2,3,4,or 6 zeros but never 5 zeros?
January 28, 2011

MATH!!!!
Im new, and I just noticed that....Thanks
January 28, 2011

MATH!!!!
January 28, 2011

MATH!!!!
yes that helps. sorry i feel dumb when I ask questions alerdady on here. =/
January 28, 2011

MATH!!!!
A triangle with side lengths 26, 28, and 30 is constructed so that the longest and shortest sides are tangent to a circle. the third side passes through the center of the circle. compute the radius of the circle. I DON'T KNOW HOW TO DO THIS AT ALL....
January 28, 2011

MATH
A dartboard has the numbers 3, 6, 9, 12, 15, 19, 21, 25, 27, and 30 on it. What is the fewest number of darts that could be thrown if two darts tcannot land on the same number and if the sum of the scores must be 50?
January 27, 2011

Algebra
The discriminant is b^2-4ac I won't do all the work for you, but figure that number out. -If its positive, theres two solutions -If its negative there are no solutions -If its zero theres one solution.
January 27, 2011

Organic Chem
The result is a peptide bond.
January 27, 2011

math
Sally can paint 1/4 of a house per hour. John can paint 1/6 of a house per hour. Let's say the answer is t hours for the total job. Then (1/4)t + (1/6)t = 1 (1/4 + 1/6)t = 1 (6/24 + 4/24)t = 1 (10/24)t = 1 t = 24/10 hours = 2.4 hours
January 26, 2011

Math
In a variant of the game Nim, two players alternate taking turns in removing 1, 2, or 3, beans from a pile. The object is to remove the last bean. If the initial pile has 29 beans, should you want to go first or second to guarantee a win?
January 26, 2011

Espanol III
su español es perfecto!!!!!
January 26, 2011

geomatry
m (DOC) = 3/4m(BOA)
January 21, 2011

calculus
On the graph of f(x)=7sin(7pi x), points P and Q are at consecutive lowest and highest points with P occuring before Q. Find the slope of the line which passes through P and Q.
January 15, 2011

Physics
a 10 kg gun recoils with a speed of 0.1 meter per second as it fires a 0.001kg bullet. what is the speed of the bullet as it leaves the gun
January 13, 2011

chemistry
If you have 25 liters of carbon dioxide at STP, how many grams of it do you have?
January 11, 2011

algebra
January 8, 2011

Chemistry
Compounds can be classified as acids or bases according to _____ different theories.
January 8, 2011

Chemistry
A .35M solution of a newly synthesized acid, HX, has [H+] of 4.1 x 10^-2. What is the value of Ka for this acid?
January 8, 2011

math
If p = 2 and q = 8, the value of p^3 + 64 squared ÷ q is _____. All i can say is huh????
January 5, 2011

math
The names and ages for each person in a family of five follow: Name Dick Jane Kirk Jean Scott Age 40 36 8 6 2 a. What is the mean age? b. Find the mean of the ages 5 yr from now. c. Find the mean 10 yr from now. d. Describe the relationships among the means found in (a), (b), ...
January 5, 2011

math
Assuming the probability is that a child is a boy and births are independent. What is the probability that if a family will have four children (no twins), they will all be boys?
January 4, 2011

math
Suppose that a ball is drawn at random from the box (a), its color is recorded, and then the ball is put back in the box. Draw a tree diagram for this experiment and find the probability that the two balls are of different colors.
January 4, 2011

English
Identify the word in bold type. This car was fixed by the woman WHOSE parents used to live in New York. demonstrative pronoun indefinite pronoun interrogative pronoun relative pronoun not a pronoun
January 4, 2011

Physic
If the coefficient of static friction for tires on a road is 0.25, at what maximum speed can a car round a level 47.5 m radius curve without slipping?
January 3, 2011

physics
Im working on this same question too and i cant figure out how you got the .5 when doing 3.6*.866/.5 ??? because i know the answer is correct, is it because the net force goes through the middle?
January 1, 2011

math
A box contains three white balls and two red balls. A ball is drawn at random from the box and not replaced. Then a second ball is drawn from the box. Draw a tree diagram for this experiment and find the probability that the two balls are of different colors.
December 27, 2010

math
If 10 is removed from the set of whole numbers, is the set closed with respect to addition? Explain why or why not.
December 20, 2010

english
how does it meets the promise of the opening of the Declaration's second paragraph, and how it does not.
December 16, 2010

Using the butterfly method, which fraction is less 1/4 or 1/3 - I know the answer but using the butterfly method the answer does not work out? Am I doing something improper? Thanks!
November 30, 2010

us history
Some help with this questions would be great....thanks everyone. I would like to say the answer is #1. As president, John Quincy Adams supported... 1.a national bank to promote a uniform currency and to control credit. 2.a strict limit on the powers of the federal government. ...
November 29, 2010

LIT/210
Thank you very much for the additional information I am certain that this will be useful. Thanks again!
November 18, 2010

LIT/210
What are some additional methods that I could use during my lit course to write about the literature I will be reading? I need four, but I only could think of two. These are the two I have so far. 1)I have thought about using a reading journal to write down my thoughts and ...
November 18, 2010

Math
Opps, sorry.. I forgot to write that Maria also has a project worth 4% which she got perfect on
November 18, 2010

Math
There are four tests in a year. The first test is worth 26%, the second is worth 20%, the third test is worth 30%, and the fourth test is 20%. Maria received a 59% on her first test. To receive a final mark of 65%, what is the minimum she needs to obtain on each test? Can ...
November 18, 2010

Algebra 2
Which one is a rule for the nth term of an arithmetic sequence with a8 = 56 and d = 5?
November 18, 2010

Chemistry
The mass of S-34 is greater than the mass of S-32
November 15, 2010

Chemistry
A current of 0.80 A was applied to an electrolytic cell containing molten CdCl2 for 2.5 hours. Calculate the mass (in grams) of cadmium metal deposited. [Enter only numbers in the blank.]
November 15, 2010

Chemistry
Calculate the cell emf (in volts) for the following reaction at 25°C: Ni(s) + 2 Cu2+(0.010 M) → Ni2+(0.0010 M) + 2 Cu+(1.0 M) [Enter only the number of your answer.] Answer
November 15, 2010

Chemistry
How many hours will it take to produce 78.0 g of Al metal by the reduction of Al3+ in an electrolytic cell with a current of 2.00 Amperes? [Enter only a number for your answer.]
November 15, 2010

Chemistry
Consider an electrochemical cell based on the following cell diagram: Pt | Pu3+(aq), Pu4+(aq) || Cl2(g), Cl−(aq) | Pt Given that the standard cell emf is 0.35 V and that the standard reduction potential of chlorine is 1.36 V, what is the standard reduction potential E&...
November 15, 2010

Math
Six girls each invited a date to the Sadie Hawkins dance. Before they joined in the fun, each couple worked in a different booth. The booths were Popcorn Sales, Marriage, Hayrides, Old Time Photos, Lemonade, and Raffle Tickets. Grab your partner and go round and round with ...
November 7, 2010

statistics in psych
mouradian (2001) surveyed college students selected from a screening session to include tow groups a) perps b) comparisons...
November 6, 2010

history
what three things did roosevelt say the country had to do to turn the economy around?
November 5, 2010

science
an air sample contains 0.046% CO2 if the total pressure is 760mmHg what is the partial pressure of CO2
November 4, 2010

Physics
A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 9.8 m/s. Also, it has an acceleration in the direction parallel to the walls of 3.7 m/s2.At what angle with the wall will the particle strike...
October 31, 2010

Math
lisa cut a log into 4 pieces in 6 minutes. she then cut a smaller log into 8 pieces. how long should the job have taken if she worked at the same rate she had worked when cutting the first log? show all work and prove your answer.
October 31, 2010

1. Pages:
2. <<Prev
3. 1
4. 2
5. 3
6. 4
7. 5
8. 6
9. 7
10. 8
11. 9
12. Next>>