Thursday
October 2, 2014

Posts by lili


Total # Posts: 68

Math
Here is the question : A Ferris wheel is 40 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 4 minutes. How many ...
September 2, 2014

geometry
1) A billboard on level ground is supported by a brace, as shown in the accompanying diagram. The measure of angle A is 15 degrees is greater than twice the measure of Angle B. Determine the measure of Angle A and the measure of angle B.
September 28, 2013

math
how can you use models to show and name a number 1,400 in two different ways? explain
September 16, 2013

Physics
A surveyor measures the distance across a straight river by the following methods: Starting directly across from a tree on the opposite bank, she walks 249 m along the river bank to establish a baseline. Then she sights across to the tree. The angle from her baseline to the ...
September 2, 2013

physics
A SUPPOSED TREASURE OF OLD SILVER JEWELRY IS UNCONVERED. a.02M^3 BOX OF THE "OLD JEWELRY" HAS A MASS OF 177KG.IS IT R EALLY OLD SILVER? IF NOT WHAT IS IT?
March 18, 2013

Physics
why is the heat lost by the metal sample (Ql)equal to he heat gained by the water in the calorimeter (QG)?
January 17, 2013

statistics
i have first part. If u have a second, wy can exchange.
January 14, 2013

math please help!!
2x^2-4X-3=6
December 19, 2012

math
find an equation in slope-intercept form of the line that has slope 2 and passes through point A(-8,7)
December 19, 2012

math
find all real zeros of the function y=-7x+4. a.-4/7 b.-7,4 c. -7 d.4/7 how do you find it?
December 19, 2012

physics
An astronaut throws a wrench in interstellar space. How much force is required to keep the wrench moving continuously with constant velocity? Select one of the options below as your answer: A. a force equal to its weight on Earth B. a force equal to zero C. a force equal to ...
November 27, 2012

physics
An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object after the application ...
November 27, 2012

physics
An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object after the application ...
November 27, 2012

physics
An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object after the application ...
November 27, 2012

organic chemistry
when 2 propanol was used as the developing solvent, two substances moved with the solvent front (Rf=1) during TLC analysis on a silica gel plate. can you conclude that they are identical? if not what additional experiments would you perform?
October 17, 2012

math
nearest tenth of a percent of 1/260
September 5, 2012

physics
A metallic surface emits photo electrons when green light falls on it. But the metal does not emit when yellow light falls on it. Which of the following is correct when red light falls on the metallic surface?
May 31, 2012

math
I am a 3 digit odd umber. my tens digit is one less than my hundreds digit but two more than my ones digit. The sum of my digits is 20. who am I?
January 10, 2012

Differenctial equations
Use the change of variable x = exp(s) to recast the differential equation xy′′+y′+(L/x)y=0 Please HELP ME
October 14, 2011

chemistry
Find the theoretical yield when 100 mL of 0.1 M NaI is reacted with 0.50 mL of Br2 (density: 3.10 g/mL) to produce NaBr and I2. What is the actual yield if the percent yield is 81%? (Atomic masses (g/mol): Na, 22.99; I, 126.9; Br, 79.90)
August 22, 2011

algebra
6(5)-3(5)^2+3^3=-18
August 22, 2011

chemistry
(AAAAA)The standard reduction potentials of lithium metal and chlorine gas are as follows: (for Li, reduction potential is -3.04, for Cl it is 1.36) In a galvanic cell, the two half-reactions combine to 2Li{+](s) + Cl{-}2(g) --> 2Li{+}Cl{-}(aq) Calculate the cell potential ...
April 28, 2011

chemistry
Great! The CN was the spectator that did "nothing." thank you very much.
April 27, 2011

chemistry
the answer is 4AG + 8CN{-} + O2 + 2H2O=> 4AG(CN)2{-} + 4OH{-} I do not understand the plugging in of CN. COuld You please explain?
April 27, 2011

chemistry
I think I understand...but how do I do CN- reactant? do I do a half reaction too?-->with a product of CN2???
April 27, 2011

chemistry
Balance the following redox equation occurring in a basic solution: AG + CN{-} + O2 = AG(CN)2{-} I tried...but this is wrong...2H2O+ AG + CN{-} + O2 = AG(CN)2{-}+4OH{-}... I am supposed to do half reactions...how do I spit the product AG(CN)2{-}?????
April 27, 2011

chemistry
oh never mind--I got it!!! (I did half reactions...)
April 26, 2011

chemistry
The reaction of MnO4- with oxalic acid (H2C2O4) in aciic solutiob, yielding Mn2+ and CO2 gas, is widely used to determine the concentration of permanganate solutions. (a) write a balanced equation for the reaction would it be MnO4- + H2C2O4 --> Mn2C2O4 + H2O + O3-?????
April 26, 2011

statistics
5x4x3
March 16, 2011

BK
If the incline is 25 degrees and a box that is resting on the frictionless incline 50 kg, what is the box acceleration
December 15, 2010

chemistry
mol HA + NaOH --> NaA + H2O i x 0.030 f x-0.030 0 0.030 pH = pKa + log(0.030/x-0.030) x = 0.042 mol PM=5.5g/0.042mol = 129.1 g/mol
November 25, 2010

science
a girl delivering newspaper travels 3 blocks west, four blocks north, then 6 blocks east. What is the total distance she travel
October 20, 2010

4th grade
sol. ass 5% + ? apa distilata = sol. hipochloride 4%
September 19, 2010

physics
39.16
September 1, 2010

Physics
1.6
June 8, 2010

sequence and series
express the given repeating decimal 0.159159159 as a fraction
April 12, 2010

Pre Algebra
can you teach me how to do math? please
February 13, 2010

matc
If a manufacturer charges q dollars each for footballs, then he can sell 3000-150q footballs per week. Find a polynomial R(q) that represents the revenue for one week. Find the weekly revenue if the price is $8 for each football.
January 14, 2010

math
MY DAUGTHER WILL BE 10 YEARS NEXT WEEK AND THE HOMEWORK SAID: A NORMAL PERSON BLINKS ABOUT 25 TIMES PER MINUTE WHEN AWAKE. A) HOW OLD WILL YOU BE ON YOUR NEXT BIRTHDAY; B) TO THE NEAREST MILLION, HOW MANY TIMES WILL YOU HAVE BLINKED ON YOUR NEXT BIRTHDAY?. ASSUME YOU SLEEP 8 ...
November 21, 2009

math
Roberto ate 3 pieces of a pizza and them felt that he should pay 1/4 of the cost because that's the fraction he ate. How many pieces was the pizza cut into? Please could you explain me the problem and you give me the answer? thank you
November 21, 2009

geometry
given: angle 1 is congruent to angle 2, angle measure 1=120 prove: angle measure 3=120
September 23, 2009

physics
For constructive interference d sinQ=ml=2x460nm=920nm For destructive interference of the other light, we have d sinQ=(m’+1/2)l When the two angle are equal, then 920nm=(m’+1/2)l l=1.84x103 nm for m’=0 l=613 nm for m’=1 l=368 nm for m’=2 The only ...
March 26, 2009

Math(place value numberation)
what 1min 38.29
March 23, 2009

Maths-Algebra.
z=6.75?
March 10, 2009

algebra 2
oh yeah duh haha it doesn't matter what was before there're two choices haha i remember now :] hey answer my question!!
March 9, 2009

algebra 2
i think ... isn't it 3/4?
March 9, 2009

Algebra
that's what i got too
March 9, 2009

History
it looks like my teacher printed out highlights from our lesson and whited out parts, it's a "fill in the blank" packet but i don't have the book and it's due tomorrow! What do i do?
March 9, 2009

math6
between 2 1/2 and 3 is 2 3/4 between 3 1/2 and 4 is 3 3/4
March 9, 2009

7th grade science
i'm an eighth grader and idk what you guys are talking about :]
March 6, 2009

ochem
Can you suggest some possible reasons for using a mixture of water and ethanol (1:1 mixture H2O/EtOH) as crystallizing solvent rather than using either pure ethanol or pure water?
January 23, 2009

organic chemistry lab
What would be the effect of raising the temperature and increasing the carrier gas flow rate on the ability to resolve two closely spaced peaks?
January 19, 2009

Science
If the energy carried by a sound wave is multiplied by a thousand, by what factor does the intensity of the sound wave increase?
January 13, 2009

history
when was willian (Bill) H. Gates born?
November 18, 2008

chemistry
What preliminary test are you looking for to identify conclusively your unknown solutions as Set C? Explain
October 16, 2008

chemistry
what simple test would you use to identify the possible presence of HCl(aq)? What result do you expect if the solution is HCl(aq)?
October 16, 2008

chemistry
write a balanced equation for the reaction that occurs when an aqueous solution of iron(II) chloride is mixed with an aqueous solution o potassium hydroxide.
October 16, 2008

chemistry
Hydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the following equation: CH4(g)+H2O(g) = CO(g) + 3H2(g) In a particular reaction, 26.5 L of methane gas (measured at a pressure of 736 torr and a temperature of 25 C ) is ...
October 13, 2008

chemistry
A weather balloon is inflated to a volume of 27.0 at a pressure of 730 and a temperature of 31.3. The balloon rises in the atmosphere to an altitude, where the pressure is 365 and the temperature is -14.6. Assuming the balloon can freely expand, calculate the volume of the ...
October 12, 2008

chemistry
A weather balloon is inflated to a volume of 27.0 at a pressure of 730 and a temperature of 31.3. The balloon rises in the atmosphere to an altitude, where the pressure is 365 and the temperature is -14.6. use as a ideal gas behavior
October 12, 2008

chemistry
use as a ideal gas behavior
October 12, 2008

chemistry
A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 1.55 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
October 12, 2008

italiano
come cambiare la scuola
January 22, 2008

geometry
the surface area of a sphere if the radius, r, is 6 meters.
January 13, 2008

WRITING
What differences did you notice between your logical reasoning process and your moral reasoning process?
December 11, 2007

pigskin
week 11 and 12 its hard
November 29, 2007

GEOMETRY
the surface area of a sphere if the radius, r, is 6 meters.
November 28, 2007

science - controlled experiment
what's the answer
December 13, 2006

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