Tuesday

January 27, 2015

January 27, 2015

Total # Posts: 69

**physics**

the brakes of a car provide an acceleration of -5.0 m/s^2 . how long will it take for a car traveling at 20.0 m/s to stop ?
*January 16, 2015*

**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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