Monday

February 20, 2017
Total # Posts: 1,099

**physics**

Above answer is completely wrong.. it seems he forgot that it's an initial value problem

*April 5, 2011*

**math**

5+(3x3-3) / 2 =

*April 5, 2011*

**math**

What is the union of x and y? X. (3,6,9) Y. (5,10,15)

*March 27, 2011*

**chemistry**

Calculate the pH after 0.15 mol of NaOH is added to 1.00 L of the solution that is 0.50 M HF and 1.01 M KF

*March 25, 2011*

**MATH**

THE MIDDLE IS 14 & 23 = 37/2 = 18.5 WHAT IS THE HUNDREADTH ????

*March 24, 2011*

**MATH**

FIND THE MEDIAN OF THE FOLLOWING PROBLEM. ROUND TO THE NEAREST HUNDREADTH. 8,9,10,12,14,23,23,29,34,37

*March 24, 2011*

**physics**

A hollow, thin-shelled ball of mass rolls along a horizontal surface with a translational speed of .

*March 22, 2011*

**geometry**

In the parallelogram above, line segment AE equals 12 mm. Line segment BE equals 16 mm. What is the length of line segment CD in the parallelogram above?

*March 17, 2011*

**calculus**

let f(x) = Sec (x) in the interval 0<x<pie/3. What is the average rate of change of f(x) with respect to x in this interval?

*March 10, 2011*

**math**

How do the acute and obtuse angles compare to the right angle?

*March 9, 2011*

**chemistry**

What is the vapor pressure (in mm Hg) of a solution of 12.5 g of glucose ( C6H12O6) in 75.0 g of methanol (CH3OH) at 27 degrees celcius? The vapor pressure of pure methanol at 27 degrees celcius is 140 mm Hg.

*March 9, 2011*

**chemistry**

How many grams of water should you add to 31.0g of sucrose,C12H22O11, to get a 0.855 m solution?

*March 9, 2011*

**math**

that is all the information given

*February 28, 2011*

**math**

beth has a box of shirts.one half of the shirts are small,2/5 of the shirts are meduim,and 5 shirts are large.how many shirts are in the box?

*February 28, 2011*

**math**

show why two thirds of 9 and one third of 18 name the same number.use counters or draw a picture to explain your reasoning.

*February 24, 2011*

**Physics**

you actually have to subtract the frictional force not add it

*February 21, 2011*

**english**

what is number facts about the topic gel pens

*February 16, 2011*

**social studies**

unscramble siclalacs

*February 16, 2011*

**Physics**

0.11 m, so the center of mass of that part of the chain is 0.055 m below edge. W = mgH = (0.021/3)kg*g*(0.055) = ____J notice that the kg is different.

*February 16, 2011*

**Physics**

A 55 kg skier is going down a slope with an angle of 47 degrees. Mk= 0.15. How fast is he going after 6 seconds?

*February 15, 2011*

**Physics**

A 200N sign hangs and makes a 15.5 angle with the horizontal. What is the Tension in each rope?

*February 15, 2011*

**7th grade introduction/conclusion**

Sorry for a useless reply, but Kathryn, if you wrote a novel you wouldn't be using "u" and "ur"

*February 10, 2011*

**math**

What is the value of 3/14 rounded to the nearest fourth?

*February 9, 2011*

**9th grade Math**

85 x 8 = 680

*January 22, 2011*

**Social Studies 20-1**

Could you tell me what kind of nationalism they might be? (just so i get an idea)

*January 17, 2011*

**Social Studies 20-1**

Can someone explain to me what these sourses mean and how they relate to nationalism? (just so i have an idea of what i am going to write about) SOURCE 1 "the lines of red are blood, nobly and unselfish shed by men who loved the liberty of their fellowmen more than they ...

*January 17, 2011*

**world history**

Prehistory ended with the invention of what?

*January 17, 2011*

**calculus**

Find the point on the curve y=x^(1/2) that is a minimum distance from the point (4,0). My book says you use the distance formula. Then you let L = D^2 because the minimum value of D^2 will occur at the same value of x as the minimum value of D. What is L, though.

*January 16, 2011*

**Math**

Thank you!

*January 15, 2011*

**Math**

DETERMINE the equation of the circle that has the following three points on its circumference: A(1,5), B(3,7) and C(5,5).

*January 15, 2011*

**math 20**

how did u get -3^3 and 4^2?

*January 15, 2011*

**physics**

The velocity of a diver just before hitting the water is -8.4 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.82 s of the dive? This problem with different numbers has been done on here before, but when i ...

*January 14, 2011*

**biology**

A eukaryotic gene typically has all of the following features except: a) an operator b) control elements c) a promoter d) introns e) a terminator

*January 13, 2011*

**fraction x whole number**

the problem is 7/10 x 30 = how do you convert and get the answer

*January 4, 2011*

**concavity**

The graph of the function y= x3+6x2+7x-2cos x changes concavity at x=

*December 31, 2010*

**chemistry**

okay thanks...but don't you have to use roman numerals for elements in the "d" block?

*December 14, 2010*

**chemistry**

write the correct formula for the compound listed below: 1. Silver Oxide my answer: AgIIO correct?

*December 14, 2010*

**english**

can feelings be personified or is it more a projection? i am writing an essay on Life of Pi and i would like to say that Richard Parker is a projection of Pi's fears. Does the use of the word projection make sense?

*December 14, 2010*

**math**

if you find the decimal value for each of these you will be able to easily tell the order. for example: the decimal value for the fraction 3/4 is .75 hope this helps!

*December 12, 2010*

**english**

okay thanks! because i am having a difficult time writing an essay i have! but that helps thanks

*December 12, 2010*

**english**

when writing an essay is this a good way to do it?: thesis statement body paragraphs conclusion intro

*December 12, 2010*

**chemistry**

Butane has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 degrees C. A 250mL sealed flask contains 0.5g of butane at 25 degrees C. How much butane is present as a liquid? If the butane is warmed to 25 degrees C, how much is present as a liquid

*December 10, 2010*

**Algebra**

I am stuck... find the real solutions of the equation x to the 4th power minus 20x squared plus 64 equals 0

*December 8, 2010*

**chemistry**

What is the expected van't Hoff factor for NaC2H3O2 in an aqueous solution, assuming 100% dissociation.

*December 6, 2010*

**English**

The problem is my thesis statement. That is the step I am stuck on.

*December 6, 2010*

**english**

hey its me again... i think i need to reword my issue. i am having trouble clearing up my thesis. I feel like i have the idea but it doesnt set me up to write an organised paper. the idea being that if Richard is God and Richard and Pi are one then Pi is God

*December 6, 2010*

**10th grade**

wait let me reword my question... i am having trouble clearing up my thesis. I feel like i have the idea but it doesnt set me up to write an organised paper.

*December 6, 2010*

**10th grade**

I am having a hard time starting my paper on Life of Pi by Yann Martel. My thesis is: If Richard Parker is Pi Patel then Pi is God. I don't know how to begin.

*December 6, 2010*

**English**

What is the Greastest injustice of slavery according to douglass?

*December 6, 2010*

**Chemistry**

66.7 g

*December 5, 2010*

**English question**

Why do you think Douglass says of the killing of slave Demby ‘in an instant poor Demby was no more. His mangled body sank out of sight, and blood and brains marked the water where he stood.”? To me it seem as if hes sayint how he died instantly but idk i need more...

*November 30, 2010*

**math**

over 9000

*November 18, 2010*

**geometry**

find the measure of an angle that is supplementary to an angle of size 35 degrees, 1 inch, 51 inches

*November 17, 2010*

**7th grade health**

how much energy you use when you workout?

*November 16, 2010*

**chemistry**

Reactants for the following reaction are placed in a 10.0 L flask held at 250 degrees C and at initial partial pressures of 1.00 atm each. Calculate the final pressures of each reactant and product, assuming the reaction goes to completion. 4 N2O(g) + CH4(g) = 4N2(g) + 2H2O(g...

*November 11, 2010*

**Math**

A bag contains four balls. Three are red, and the fourth is either red or blue, selected with equal probability. A ball is drawn from the ball and it is red. What is the probability that one of the balls still in the bag is blue?

*November 7, 2010*

**Math**

At Small Town High there are 100 students, each of whom takes at least one of biology, chemistry, or physics. There are 50 students in biology, 60 in chemistry, and 70 in physics. If 24 students are enrolled in exactly two of these classes, how many students are in all three?

*November 7, 2010*

**english**

Call of Duty, Halo, Mortal Kombat, Red Steel, etc.

*November 7, 2010*

**math**

if (x^65535)-1 is divisible by the prime number 65537, x is an integer, and 0 ≤ x < 65537, how many values of x are possible?

*November 7, 2010*

**math**

t=1/8 16t=2 s=1/4 32s=6 Q=1/64

*November 7, 2010*

**AP Chem**

Molarity = moles/Liters so moles = Molarity * Liters moles = 3.60 M * .455 L = 1.64 moles of Al 1.64 moles Al / 4 moles Al = .4095 (this number is how many times the reaction can be done) .4095 moles * -3339.6 kj/mol (negative because you're doing reverse reaction and ...

*November 7, 2010*

**Chemistry**

For each mole of CH4 reacted there is 50.38 kj released. 137 kj * (1 mol/50.38 kj) = 2.719 moles of CH4. 4 sig figs additional info: 50.38 is positive because it's asking how much heat is produced (released) and if you say -50.38 kj is released it's like a double ...

*November 7, 2010*

**trig**

3tan(3x) = sqrt(3) Solve the equation for exact solutions of the interval [0,2pi).

*November 4, 2010*

**Physics**

which end are you looking for?

*November 3, 2010*

**Physics**

Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. I've done all the work but I can't seem to get the right answer, please show work and answer.

*October 28, 2010*

**exponents math**

evaluate (-1)^3= evaluate -1^3= evaluate (-1)^2= evaluate -1^2=

*October 28, 2010*

**figurative language**

plz help me i am in 5th grade and need help on similies & metaphores about the book number the stars. it asks "it was an odd word: pride." meaning proud, i think

*October 25, 2010*

**College Physics**

Answer is 0 m/s. At maximum displacement there is no velocity

*October 24, 2010*

**Physics**

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following four ...

*October 24, 2010*

**Physics**

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following four ...

*October 24, 2010*

**spanish**

Querida Beth: 1) (blank) esta todo bien y esperamos que 2) (blank) tambien lo este. 3) (blank) lo pensemos y lo conversemos, tu padre y yo no estamos contentos con tu viaje. 4) (blank) en nuestras vidas estamos muy preocupados porque creemos que eres mu joven para hacer ...

*October 20, 2010*

**physics**

Answer is 13.5 J/K. Use the formula (Delta S) = -(n)R(aLNa + bLNb) Where a and b are mole fractions Delta S = -(5.0 mol)(8.314)(.1LN(.1) + .9LN(.9))

*October 15, 2010*

**algebra**

How to factor 15x2+4x-3

*October 11, 2010*

**chemistry**

Not sure how to do any of this. Please help!!! A sample of the compound prepared in this experiment, weighing .1021g, is dissolved in HNO3 and diluted to a volume of 100mL. A 10mL aliquot of that solution is mixed iwth 10mL 6 M NH3. The [Cu(NH3)4 2+] in the resulting solution ...

*October 7, 2010*

**Math**

How do you solve this? (3x+2)(3x^2+5x-4)

*September 29, 2010*

**physics**

Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2 ?

*September 27, 2010*

**Chemistry**

Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2 ?

*September 27, 2010*

**chem**

What happens if ph meter isn't calibrated. How will it influence ka on a weak acid

*September 22, 2010*

**physics**

A freight train has a mass of 1.7 multiplied by 107 kg. If the locomotive can exert a constant pull of 7.4 multiplied by 105 N, how long does it take to increase the speed of the train from rest to 68 km/h?

*September 21, 2010*

**Chemistry**

Suppose that the KMnO4 (aq) were standardized by reaction with As2O3. As2O3 + MnO4- + H+ +H2O yields H3AsO4 + Mn2+ (not balanced). If a 0.1322-g sample that is 99.16 % As2O3 by mass had been used in the titration, how many milliliters of the 0.02140 M KMnO4 (aq) would have ...

*September 21, 2010*

**chemistry**

f 89 of heat are added to a pure gold coin with a mass of 15 , what is its temperature change? Specific heat capacity of gold is 0.128 .

*September 20, 2010*

**chemistry**

An unknown substance has a mass of 17.3 . When the substance absorbs 1.557×102 of heat, the temperature of the substance is raised from 25.0 to 45.0 . What is the most likely identity of the substance?

*September 20, 2010*

**chemistry**

Water (2690 ) is heated until it just begins to boil. If the water absorbs 5.29×105 of heat in the process, what was the initial temperature of the water?express answer in Celsius.

*September 20, 2010*

**science**

What are 3 items you can mix together and then they will settle into 3 different layers?

*September 20, 2010*

**physics**

A hare is resting behind a rock, when he suddenly sees a tortoise cruising by at a constant 4.0m/s. The hare, literally at rest initially, decides he must catch up with the tortoise, to save face. So, he accelerates uniformly to 6.0m/s in 4.0 seconds. Once he reaches 6.0m/s, ...

*September 17, 2010*

**physics**

A car brakes, changing from 18 m/s to 6.0 m/s in 3.0 seconds. How far did it travel in this time?

*September 15, 2010*

**physics**

Annie is walking to school leisurely at a speed of 1.0 m/s for the first half of her trip. She then remembers that her physics teacher told her that she must average 2.5 m/s to make it to school on time. Realizing she might be late, she starts running. However, after a quick ...

*September 13, 2010*

**Physics**

and is the final velocity 45/7?

*September 13, 2010*

**Physics**

Is the initial velocity 0?

*September 13, 2010*

**Physics**

An airplane can reach a takeoff speed of 45 m/s (from rest) in 7.0 seconds. What is the minimum runway length required for a safe takeoff?

*September 13, 2010*

**9th Grade Biology**

Yes

*September 8, 2010*

**english**

i don't get what you're saying.. that would work for all 5 of those things?

*September 3, 2010*

**english**

How would I write a thesis statement for a reflective essay on that many things.. im confused What character (s) was your favorite? Why? What character (s) did you dislike? Why? Do any of the characters remind you of yourself or anyone you know? Explain. ...

*September 3, 2010*

**physics**

what are the values of g,m1,m2,and d if f=g times m1 m2 all over d squared

*August 31, 2010*

**physics**

Lauren was playing hockey and took a 90 km/hr slap shot at the goal, 10 m away. If the goalie must move her glove 0.50 m to stop the puck, and her reaction time is 0.18 seconds, how fast must she move her glove?

*August 31, 2010*

**physics**

sorry, i meant smyrna and marietta.

*August 31, 2010*

**physics**

Smyrna and Marietta are 35 mi apart. A car takes 45 min to go from Exeter to Manchester. The return trip takes 35 min. a) determine the average SPEED of the car for the round trip. b) determine the average VELOCITY of the car for the round trip

*August 31, 2010*

**biology**

similarities and differences in the bodily functions themselves

*August 21, 2010*

**biology**

discuss the similarities and differences between respiration, defecation and the formation of urine with regard to waste disposal. I can only come up with one in each category!

*August 21, 2010*

**Geometry**

Four identical metal spheres, each with radius 6 cm, are melted and reshaped into one big sphere. Fine the radius of the new sphere.

*August 15, 2010*