Monday

August 31, 2015
Total # Posts: 1,721

**Science (Chemistry)**

How many grams of dry NH4Cl need to be added to 1.90 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.99? Kb for ammonia is1.8*10^-5. Can anyone help me with this question? I have no idea how to solve it.
*March 12, 2012*

**voc 4**

The answer isnt most
*March 7, 2012*

**grammar**

What should i put? Five dollars (was,were)lying on the ground,so i turened them in at the office.
*March 6, 2012*

**physics**

The electric motor of a model train accelerates the train from rest to 0.680 m/s in 23.0 ms. The total mass of the train is 580 g. Find the average power delivered to the train during its acceleration.
*March 6, 2012*

**Health**

Maintaining a healthy diet can protect you from? A. Drug abuse B. Alcohol abuse C. Some cancers D. Sickle cell disease
*March 1, 2012*

**5 grade math**

The highest temperature on monday was 30 degrees. If the average high tempature for the week was 45 deggrees, what statement can you make for mondays tempature😕😧
*February 29, 2012*

**Math**

A farmer needs to enclose three sides of a pasture with a fence (the fourth side is a river). The farmer has 42 meters of fence and wants the pasture to have an area of 220 sq-meters. What should the dimensions of the pasture be? (For the purpose of this problem, the width ...
*February 29, 2012*

**Chem 1A**

Calculate the [OH ‾ ], [H+], and the pH of 0.16 M solutions of each of the following amines. (a) triethylamine [(C2H5)3N, Kb = 4.0 10-4] (b) hydroxylamine (HONH2, Kb = 1.1 10-8)
*February 28, 2012*

**Physics**

Two point charges, +Q and -Q of mass m, are placed on the ends of a massless rod of length L, which is fixed to a table by a pin through its center. If the apparatus is then subjected to a uniform electric field E parallel to the table and perpendicular to the rod, find the ...
*February 28, 2012*

**Physics**

Two point charges, +Q and -Q of mass m, are placed on the ends of a massless rod of length L, which is fixed to a table by a pin through its center. If the apparatus is then subjected to a uniform electric field E parallel to the table and perpendicular to the rod, find the ...
*February 28, 2012*

**physics**

a person is sled-riding down a hill that is 15.0 ft high. starting at the top with a speed of 10.0 ft/s, the sled reaches the bottom with a speed of 25.0 ft/s. (A) determine whether mechanical energy has been conserved. (B) why might mechanical energy not be conserved?
*February 28, 2012*

**statistics**

Science scores for HS seniors in the US are normally distributed with a mean of 77 and a standard deviation of 7. Students scoring in the top 4% are eligible for a special prize. What is the approximate cutoff score a student must get in order to recieve the prize?
*February 27, 2012*

**statistics**

Science scores for HS seniors in the US are normally distributed with a mean of 77 and a standard deviation of 7. Students scoring in the top 4% are eligible for a special prize. What is the approximate cutoff score a student must get in order to recieve the prize?
*February 27, 2012*

**Chemistry**

If acetic acid is the only acid that vinegar contains , calculate the concentration of acetic acid in the vinegar. if the pH of vinegar is 2.7
*February 26, 2012*

**Math**

Rebekah's recipe for 4 1/2 dozen cookies calls for 6 cups of sugar. How many cups of sugar are needed to make 8 dozen cookies? Is the correct answer 10 2/3 cups?
*February 25, 2012*

**math**

ive gotten 35 im no so sure can you help me
*February 24, 2012*

**math**

well ms sue i got 64 im not sure can you show me
*February 24, 2012*

**math**

what is 9+9d=8d-12
*February 24, 2012*

**physics please help**

the floors in a typical house are separated by a vertical distance of approximately 8.0 ft. a teenager (1.0x 10^2 lb) climbs the stairs between floors at a steady speed. find the power necessary to accomplish this if the stairs are climbed in (a) 10.0 s and (b) 2.0 s. express ...
*February 24, 2012*

**physics please help**

one kilwatt/hour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied fr a time of one hour. a kilowatt/hour is the unit of energy used by power companies when figuring your electric bill. determine the number of joules of energy in one ...
*February 24, 2012*

**math**

write a problem you could represent with 3n-7=14.
*February 23, 2012*

**math**

the problem's numbers used $10,$2, $36
*February 23, 2012*

**math**

but you got 26 how did you get that
*February 23, 2012*

**math**

this years funderaiser picnc is $10 per person plus $2 for each person in the family. determine the number of people in a family that pays $36?
*February 23, 2012*

**math**

the picnic committee dicided that the charge for this year's fundraiser picnic is $10 per family puls %2 for each person in the family. determine the number of people in a family that pays $36?
*February 23, 2012*

**math**

thank you
*February 23, 2012*

**math**

two less than three times a number is equal to 16. what is the number?
*February 23, 2012*

**physics ( please help me)**

A brick with a mass of 0.400kg is pressed against a vertical spring with force constant k=500 N(m^-1) such that the spring is compressed 0.200m. When the brick is released, how high does it rise from this position? (the brick and the spring are not attached. The spring has ...
*February 23, 2012*

**physics ( please help me)**

A 2.00kg block is pushed against a spring with force constant k=400N(m^-1), compressing it 0.180m. The block is then released and moves along a frictionless horizontal surface and then up frictionless incline with slope angle 37.0degrees. a. What is the speed of the block as ...
*February 23, 2012*

**physics ( please help me)**

a block with a mass of 5.00 kg is moving at 8.00 m/s^-1 along a frictionless horizonal surface toward a spring with force constant k= 500 N/m^1 that is attached to a wall.find the maximum distance the spring is compressed. the spring has negligible mass.
*February 23, 2012*

**math**

2/7n+n=5/9
*February 22, 2012*

**math**

2/7n+n=5/9
*February 22, 2012*

**Pre-Algerbra**

8--w/10=3/5
*February 22, 2012*

**Pre-Algerbra**

2/7n+n=5/9
*February 22, 2012*

**English- attribution help**

i don't know how i would set up the attribution for this fact. i got it from a pdf file online called- Women in Prison and Children of Imprisoned Mothers Series this is the quote- “Children should be consulted in determining the extent and type of relationship they ...
*February 20, 2012*

**Geometry**

1.) what is the length of the line segment whose endpoints are (1,1) and (3,-3)? 2.) what are the coordinates of the midpoint of the line segment whose endpoints are (c,0) and (0,d)? 3.) The diagonals of a rhombus have lengths of 8 cm and 6 cm. The perimeter of the rhombus is...
*February 19, 2012*

**Geometry**

I know the formulas, but I'm not sure what the answer would be. Can you please tell me?
*February 19, 2012*

**Geometry**

1.) what is the length of the line segment whose endpoints are (1,1) and (3,-3)? 2.) what are the coordinates of the midpoint of the line segment whose endpoints are (c,0) and (0,d)?
*February 19, 2012*

**science**

time travel question in km 0 - 240, a vehicles started at 30km at 2:30, where would the truck be at 3:30?
*February 15, 2012*

**English essay**

It's not a program of it's own. It's with the girl scouts their for only girls in girl scouts can do that nd it should be able that any child be able to participate
*February 14, 2012*

**English essay**

It's about the movie troop 1500. A girl scout troop that takes girls to see their mothers in jail
*February 14, 2012*

**English essay**

Thesis is -Taking daughters to see their mothers in jail should be a program of its own.- I don't know if my topic sentence are correct: Negative affect on the amount of extra responsibility the girl scouts take on. Girl scouts has an age limit for not all girls can ...
*February 14, 2012*

**English- evaluating essay**

Are these any better? I don't know if my topic sentence are correct: Negative affect on the amount of extra responsibility the girl scouts take on. Girl scouts has an age limit for not all girls can participate The social worker can focus better on just helping the girls ...
*February 14, 2012*

**English- evaluating essay**

I have write a evaluation essay on the movie Troop 1500. So my thesis is -Taking daughters to see their mothers in jail should be a program of it's own.- I don't know if my topic sentence is correct: One reason a program should be made separate for daughters who want ...
*February 14, 2012*

**English**

I have write a evaluation essay on the movie Troop 1500. So my thesis is -Taking daughters to see their mothers in jail should be a program of it's own.- I don't know if my topic sentence is correct: One reason a program should be made separate for daughters who want ...
*February 14, 2012*

**CHEM HELP!!!**

I understand question 2. But for question one, why did you multiply by (1000 mL/1L) x (1 g/1000 mg) in that way? I understand you did it to get the units right, but why was the 1000 mL on top for one and 1 g on top for another?
*February 13, 2012*

**CHEM HELP!!!**

I don't get two questions out of my homework and I know the answers to them but just not how the answers were gotten. PLEASE HELP!! 1) A handbook gives the aqueous solubility of carbon monoxide at 0 C and 1 atm CO pressure to be 0.0354 mg CO per mL of solution. What would ...
*February 13, 2012*

**math**

How many different rectangular prisms can be made using 36 cubes if the height is 2 cubes?
*February 12, 2012*

**Calculus**

I think I wrote it wrong earlier it should be Find the derivative y = (3x+2)/(x+1)
*February 12, 2012*

**Calculus**

Find the derivative y = 3x+2/x+1
*February 12, 2012*

**Calculus**

Find the derivative, with respect to x of y = 7x^2 + 3x + 2
*February 10, 2012*

**Calculus**

Integrate the following (x^5 - 2)dx
*February 10, 2012*

**reading**

what does that mean if you break it down
*February 9, 2012*

**reading**

i really truely do not understand this one it is so hard can you pleaseeeeeeeeeeeee help me :)
*February 9, 2012*

**reading**

"an it is a common wish of all henpecked husbands in the neighborood, when life hangs heavy on their hands, that they might have a quieting draft out of Rip Van Winkle's flagon." what might be Irving's purpose in ending the stroy with this statement
*February 9, 2012*

**reading**

Ms. Sue can you please help me i forgot :)
*February 9, 2012*

**reading**

i forgot ms. sue and this is due tommrow can you please help me pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee :)
*February 9, 2012*

**reading**

are you still hear Ms. Sue i need your help is this the right answer can you help me
*February 9, 2012*

**reading**

um he grew older and everything pasted before his eyes and before he was young and able to be nimble
*February 9, 2012*

**reading**

compare and contrast rip's life after his long sleep with his earlier life. in rip van winkle
*February 9, 2012*

**reading**

thanks please check my other ones
*February 9, 2012*

**reading**

i think that ms van winkle is a hard working person with her chores. and mr van winkle like helping other people and doesnt do is chores. is that right if not please correct
*February 9, 2012*

**reading**

how do Dame Van Winkles personality and rips differ
*February 9, 2012*

**reading**

yes so i could put that a wife that makes you work hard is a good wife Ms. Sue
*February 9, 2012*

**reading **

a sentence in the story says that a quarrelsome wife may be a blessing what does that mean in rip van winkle
*February 9, 2012*

**reading**

in rip van winkle why do rip and his wife have such a stormy marriage?
*February 9, 2012*

**reading**

in rip van winkle why did rip go for a walk in the mountains
*February 9, 2012*

**reading**

and sort of explain your answer
*February 9, 2012*

**reading**

i didnt understand it can you please break it down for me please
*February 9, 2012*

**reading**

well i think that we is just getting away from everyone and also he is a nature man what do you think Ms.Sue
*February 9, 2012*

**reading**

from reading Rip Van Winkle why does Rip go for a walk in the mountains?
*February 9, 2012*

**Reading**

so is the answer that his farm and home fall into a dissray Ms. Sue
*February 9, 2012*

**Reading**

in the story rip van winkle describe the great drror in rip's chraracter
*February 9, 2012*

**Pre-Algebra**

explain how the process of solving x/-2=8 is different form the procss of solving x/4=8?
*February 8, 2012*

**math**

a student soved the equation x/+5=1 without showing all the work. the student's solution is incorrect. what error did the student make?
*February 8, 2012*

**math**

good job tj
*February 8, 2012*

**Pre-Algebra**

explain how the process of solving x/4-2=8 is different from the process of sovlivng x/4=8
*February 8, 2012*

**Pre-Algebra**

a student solved the equation x/4 +5=1 without showing all the work. the student's solution is incorrect. what error did the student make?
*February 8, 2012*

**math**

96 a+
*February 8, 2012*

**Algebra**

What is the rule of a function table to find the number of inches in 4, 6, 8, and 10 feet?
*January 31, 2012*

**Physics**

A 1.00 kg block is attached to a spring with spring constant 14 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 31 cm/s. What is the amplitude of the subsequent oscillations?What is the block's speed ...
*January 26, 2012*

**math**

The distance, d, an object falls after t seconds is given by the equation d=-1/2(9.8)t^2 If t^2=83sec^2 then what is a good estimate for t?
*January 23, 2012*

**physics**

An electron that has a horizontal initial speed of 4.50 106 m/s enters a region that has an electric field of 120 V/m pointing vertically upward. (a)How long does the electron take to travel 9 cm in the horizontal direction? s (b) In this same time, what is the vertical ...
*January 18, 2012*

**physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at...
*January 17, 2012*

**physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at...
*January 17, 2012*

**math**

Please help me i really need help before school help me
*January 8, 2012*

**math**

bernie began building a model airlane on day 7 of his summer vacation and finished building it on day 65. he worked on the plane each day. how many days did it take?
*January 8, 2012*

**math**

sorry my answer is 26 is that right steve
*January 8, 2012*

**math**

so what is the answer reiny
*January 8, 2012*

**math**

at the inauguration, the President was honored with a 21-gun salute. the report form each gunshot lasted 1 s. four seconds elasped between shots. how long did the salute last?
*January 8, 2012*

**Hindi**

i dont know check the internet
*January 8, 2012*

**Geometry**

My name does not matter, i just need an answer and it would be nice if i got one instead of focusing on what name i use. Thank you . . .
*January 7, 2012*

**Geometry**

Given two statements: r -> s and ~s -> ~r, in which way is the second statement related to the first? a.) converse b.) inverse c.) contrapositive d.) biconditional
*January 7, 2012*

**physics**

when babe ruth hit a homer over the 7.5-m-high right field fence 95 m from home plate, roughly what wa the minimum speed of the ball when it left the bat? Assume the ball wa hit 1.0 m above the ground and it path initially made a 38 degree angle with the ground.
*January 5, 2012*

**physics**

apollo astronaunts took a nine iron to the moon and hit a golf ball about 180 m ! Assuming that the swing, launch angle, and so on, were the same as on earth where the same astronaut could hit it only 35 m, estimate the acceleration due to gravity on the surface of the moon. (...
*January 5, 2012*

**physics**

an olympic long jumper i capable of jumping 8.0 m. Assuming hi horizonal speed is 9.1 m/s as he leaves the ground, how long is he in the air and how high doe he go? Assume that he lands standing upright that is, the same way he left the ground.
*January 5, 2012*

**Geometry**

If each exterior angle of a regular polygon measures 40 degrees, what is the total number of sides in the polygon? a.) 9 b.) 8 c.) 6 d.) 5
*December 27, 2011*

**Geometry**

In logic, which of the following is said to be logically equivalent to the original statement? a.) converse b.) inverse c.) negation d.)contrapositive
*December 22, 2011*

**physics**

two canoeists start paddling at the same time and head toward a small island in a lake. caneist 1 paddles with a speed of 1.35 m/s at an angle of 45 degrees north of east. canoeist 2 starts on the opposite shore of the lake,a distance of 1.5 km due east of canoeist 1. what ...
*December 13, 2011*

**physics**

a mountain climber jumps a 3.0 m wide crevasse by leaping horizontally with a speed of 8.0 m/s. (a) if the climber's direction of motion on landing is -45 degrees, what is the height the difference between the two sides of the crevasse? (b) where does the climber land?
*December 13, 2011*