Wednesday

November 26, 2014

November 26, 2014

Total # Posts: 411

**physics **

can someone explain how to do this? The muzzle velocity of 60g bullet leaving 4kg rifle is 500 m/s towards the east. What is recoil velocity of the rifle?
*November 16, 2011*

**Algebra 2**

x-7
*November 16, 2011*

**algebra/trig help please**

yes
*November 16, 2011*

**algebra**

4/3*4^3 85.3
*November 16, 2011*

**math**

suppose a bag contains three orange marbles and two blue marbles. you are to choose a marble, return it to the bag, and then choose again and suppose you do this 50 times what is chance of getting 2 marbles of the same color.
*October 18, 2011*

**CHEMISTRY **

Explain, in terms of particles, concentration, and reaction rate, what you expect to happen when methane gas (CH4) and hydrogen sulfide gas (H2S) are sealed in a flask and reach a state of equilibrium. CH4 (g) +2 H2S (g) --><--- CS2 (g) + 4 H2 (g)
*August 5, 2011*

**Calculus**

thank you! but how did you go from......(1/u)*2sinx*cosx....to......sin(2x)/[sin^2x+3].............? i was just confused by this..thanks
*August 2, 2011*

**Calculus**

Hi! I am having trouble figuring out the derivative of ln[sin^2(x)+3]........... If it weren't for the "3" I know I could just "move" the exponent of 2 from sin^2 to in front of the ln,....but because of the 3 I can't do this....So what should I do...
*August 2, 2011*

**Composition and Communication**

Identify three key strategies to ensure you will choose words correctly in the future to improve your writing.
*July 8, 2011*

**physics**

Work is done when: a force is applied or an object OR a force causes an object to move
*February 20, 2011*

**science**

Work is done when a force is applied or an object OR a force causes an object to move I think the second one.
*February 19, 2011*

**grammar**

is living room a noun?
*February 6, 2011*

**french**

Does this make sense? Is there anything I should change to make it betetr, or sentences to add to it? Thank-you very much! Bonjour! Je m’appelle Kiki et je suis la fille de votre cousine, Viv! J’habite en Nouvelle Zélande et j’apprends le français...
*October 24, 2010*

**5th grade math**

46.93
*October 21, 2010*

**5th grade math**

65427.900
*October 21, 2010*

**social studies**

in what way do natural resources help to provide jobs?
*October 20, 2010*

**geometry**

in what way do natural resources help to provide jobs?
*October 20, 2010*

**9th grade**

how are you suppose to respond to ¿quién es ella? the formal way in spanish?
*October 19, 2010*

**Math**

Make up a set of at least 12 numbers that have the following landmarks maximum 18 range 13 mode 7 and median 12
*October 18, 2010*

**math **

subtract -5x-2X+8 FROM -2X+9X
*October 3, 2010*

**art **

find a image for near east and the date/time of the image and material used and used for and symbolism
*October 3, 2010*

**math **

the lowest temperature on a winter morning was -9f later that same day the temperature reached a high of 24 by how many degrees fahrenheit did the temperature increase
*October 3, 2010*

**math**

thank u
*October 3, 2010*

**4th grade**

=180,000,000,000
*September 19, 2010*

**immig.**

after i got the citizenship ,how long will it take to get my wife parmanent residence,
*July 20, 2010*

**Immigration**

i have a permanent residence ,i want to apply for my wife,how long will it take?
*July 20, 2010*

**college**

The results from an independent-measures research study are being used to estimate how much difference there is between two treatments. If the study used a total of n = 10 participants, then the t values for a 90% confidence interval would be __________.
*June 17, 2010*

**algrbra/trigonometry**

this is wrong.
*May 18, 2010*

**math**

A polyhedron has 15 vertices and 31 edges. How many faces does it have?
*May 10, 2010*

**math-PLEASE HELP**

Answer the following questions to determine why Euler’s formula continues to hold for the polyhedron formed by cutting corners off of an octahedron, : a. For an octahedron V = , ____,F = ____, and E = _____. b. When you slice off one corner of the octahedron, you (gain or...
*May 2, 2010*

**apchemistry**

thank you for your help before---also, what can i react with BaO to get some noticable consequence---how can i show that what MgO was involved in the reaction?
*April 29, 2010*

**APChemistry**

Thank you for your help! I just had a question.. is BaO barium oxide a precipitate? or if I combine MgO with Ba(NO3), will I get BaO and is this a solid?
*April 29, 2010*

**APCHemistry**

Hi these are the posts from earlier---i just had a quetsion about your response: ""Apchemistry - DrBob222, Monday, April 26, 2010 at 7:10pm Your thinking is ok. All ionic solids, although composed of ions, are locked into place by the crystal lattice structure of the...
*April 26, 2010*

**Apchemistry**

ohh so conductivity has more to do with ions that carry charge, rather than electrons carrying charge???
*April 26, 2010*

**Apchemistry**

Thank you for your help Why is solid copper (I) nitrate a poor conductor? I know that CuNO3 is an ionic solid, so maybe (please check me on this) the electrons in CuNO3 are exchanged in the formation of electrostatic attractions found within ionic solids, so the electrons ...
*April 26, 2010*

**math-please help!**

The number of complaints received by a business bureau can be represented by the following probability distribution. Find the expected number of complaints per day. complaints per day -0,1,2,3,4,5 probability-0.01,0.11,0.26,0.28,0.19,0.12 can someone please help me figure out ...
*April 25, 2010*

**math-help**

what is the formula to find the distance of a cube with three sides that are measured at 6 each.....
*April 25, 2010*

**math-please help!**

Use the properties of lines to parallel solve the problem. If p ðF q and mÚ8 = 52‹, what are the measures of the other angles?
*April 25, 2010*

**math-please help!**

Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?
*April 25, 2010*

**math**

Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?
*April 25, 2010*

**math-please help**

If a two-card hand is dealt from a well-shuffled deck of 52 cards, what is the probability that the hand contains two kings?
*April 25, 2010*

**math**

When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting a red 10 or a black 6. I think the answer is 1:12. Is that correct?
*April 25, 2010*

**apchemistry**

thank you but i do not see the post you posted to my answer...
*April 19, 2010*

**apchemistry**

How do you seprate a homogenous mixtre of 2 volatile liquids?
*April 19, 2010*

**apchem PLease Answer**

What is the equation for HOCl dissolves in HOH? I don't get it...
*April 19, 2010*

**APChemistry**

So if I can't assume that, then how can I calclate pH? I dont know K value, so I can't use Henderson Hasselbalc...
*April 18, 2010*

**APChemistry**

If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you
*April 18, 2010*

**APChemistry**

If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you
*April 18, 2010*

**APChemistry**

So if I can't assume that, then how can I calclate pH? I dont know K value, so I can't use Henderson Hasselbalc...
*April 18, 2010*

**APChemistry**

If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you
*April 18, 2010*

**APChemistry**

Hi If I had 40 mL of 0.1 M HOBr and mixed that with 10 mL of 0.5 M Ca(OH)2 how would I go about calclating the pH? (i don't know if titration is right because equivalence, halfway pts, etc.. are not specified).. Thank you very much.
*April 18, 2010*

**APChemistry**

wait, if you have "NaOBr(s) + H2O ==> NaOH + HBr and the net ionic equation is OBr^- + HOH ==> HOBr + OH^- " why doesn't this: NaOBr(s) + H2O ==> NaOH + HBr become this: Na+ + OBr- + H2O ==> Na+ + OH- + H+ + Br- which would become OBr- + H2O ==> OH...
*April 18, 2010*

**APChemistry**

thank you
*April 18, 2010*

**APChemistry**

Hi What is the netionicequation for NaOBr disolving in watr? Thanks!
*April 18, 2010*

**math-DUE TONIGHT PLEASE HELP**

can you help me get started please? I dont know where to begin
*April 12, 2010*

**math-DUE TONIGHT PLEASE HELP**

A shoe store carries one brand of shoe in 3 styles, 5 sizes, and 4 colors. How many different shoes are available for this one brand?
*April 12, 2010*

**math**

Consider the experiment of rolling a single die. Find the probability of the event described. What is the probability of rolling a number less than or equal to 4?
*April 12, 2010*

**math-DUE TONIGHT PLEASE HELP**

The mean height of 5 students is 61.8. If one of the students leaves, the mean height becomes 60. What is the height of the absent student?
*April 12, 2010*

**math**

Attendance records at a school show the number of days each student was absent during the year. The days absent for each student were as follows: 8 2 4 3 2 7 6 0 9 3 3 4 2 4 6 Create a dot plot for this data
*April 11, 2010*

**math-please help due tonight**

If P (A) = 2/3, P (B) = 1/6, and P (A and B) = 0 what can you say about P (A or B)?
*April 7, 2010*

**math-PLEASE HELP**

consider a bowl containing 36 different slipsof paper. Ten of the slips of paper each contain one of the set of digits0 through 9 and 26 slips each contain one of the 26 letters of the alphabet. Determine the probabilities of the events specified. Drawing one slip, what is P (...
*April 7, 2010*

**math157-PLEASE HELP**

When the median and mean are substantially different, what does that tell you about the data?
*March 30, 2010*

**apchemistry**

Hi Please double check me: I had to state whether the process forms a voltaic or eletrolytic cell: YOu plug in your MP3 player to charge the nickel-cadmium battery (I said electrolytic)??? The radio plays in your car even though the engine is not running. (I said voltaic???) ...
*March 30, 2010*

**apcehmistry**

A thin metal sheet is composed of Fe and Co How do you ionize Fe to Fe2+ but not ionize Co ? I tiried using the activity series of metals, but Fe is above Co, so anything that would ionize Fe would also ionize Co right? So what JUST ionizes Fe but not Co? Thaak you
*March 30, 2010*

**apchemistry**

thank you--also, does this work for the Fe iron part of the question too?
*March 29, 2010*

**apchemistry**

a thin metal sheet is compposed of Fe and Cobalt You would like to recover the Cobalt What oxidizing agent(s) would allow you to ionize Fe to Fe2+ but not ionize Co?
*March 29, 2010*

**apchemistry**

PartA Suppose you had a solution containing Pb2+ and Tl+ and wanted to convert the lead to solid metal but leave the Tl+ in solutin. What reducing agent(s) would be able to drive the reaction?
*March 29, 2010*

**apchemistry**

I tried to figure this out with my standard reduction potentials sheet, and tried to find a sulfate ion for the first part, but I don't think that is the answer...any help is much appreciated
*March 29, 2010*

**math**

Grade Frequency A 2 B 8 C 11 D 2 F 1 how would this graph change if there were twice as many grades?
*March 29, 2010*

**math**

The following data set gives the difference between the winning and losing scores in 50 randomly observed highschool basketball games: 2, 12, 1, 2, 12, 5, 14, 2, 45, 9, 1, 8, 18, 28, 9, 4, 30, 16,4, 12, 8, 13, 20, 9, 17, 13, 49, 17, 13, 4, 14, 2, 12, 29, 8,9, 11, 4, 6, 22, 4, ...
*March 29, 2010*

**Math- CAN SOMEONE PLEASE CHECK MY WORK?**

7x+5y=-26 x=28-6y solve using substitution okay so then 196-42y+5y=-26 then combined like terms so 196+37y=-26 37y=-222 y=-6 is this part correct?
*March 28, 2010*

**math-word problem- PLEASE CHECK MY ANSWER**

Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time will train B catch ...
*March 28, 2010*

**math- system**

x+5y=4 x=7-5y give the ordered pair
*March 28, 2010*

**math-word problem-please help**

Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time will train B catch ...
*March 28, 2010*

**math-slope**

f(x)=-2x-3 Find the slope and the y intercept
*March 28, 2010*

**math-graphing**

y>-5 x>6 How would I get ordered pairs to graph this?
*March 28, 2010*

**math-graphing**

How would I graph the equation y=6?
*March 28, 2010*

**math**

x+2y=4 Find the ordered pairs would this be (0,2) and (4,0)?
*March 28, 2010*

**math-please help due tonight**

find the two ordered pairs from this equation. y+x=-2 then give the ordered pair of the y intercept?
*March 28, 2010*

**math- CAN SOMEONE PLEASE HELP**

find the two ordered pairs of this equation. y=5/3x+8 then give the slope and y intercept. I know the slope is rise over run and is the y intercept 8? This is the answer I got but I am still really confused how do I get my two ordered pairs this makes no sense to me! Your Y-...
*March 28, 2010*

**math**

Find the two ordered pairs using this equation- x+3y=6
*March 28, 2010*

**math substitution method**

okay so then 196-42y+5y=-26 then combined like terms so 196+37y=-26 37y=-222 y=-6 is this part correct?
*March 28, 2010*

**math substitution method**

use the substitution method to solve 7x+5y=-26 x=28-6y
*March 28, 2010*

**math- like terms**

collect like terms 10c+5d-5c-8d= 5c+3d? is this correct?
*March 28, 2010*

**math**

find the two ordered pairs from this equation. y+x=-2 then give the ordered pair of the y intercept?
*March 28, 2010*

**math-word problem**

Amy paid $53.74 for a pair of running shoesduring a 15% off sale. what was the regular price?
*March 28, 2010*

**math-word problem**

Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time will train B catch ...
*March 28, 2010*

**math-slope and y intercept**

find the two ordered pairs of this equation. y=5/3x+8 then give the slope and y intercept. I know the slope is rise over run and is the y intercept 8?
*March 28, 2010*

**math**

Thanks Reiny
*March 28, 2010*

**math**

6x-4y=20 and 4y-6x=-20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions These points would have C correct?
*March 28, 2010*

**math- CAN SOMEONE PLEASE CHECK MY WORK**

In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data E(t)=____t+____ uses this to ...
*March 28, 2010*

**math-slope**

would the slope of (0,3) and (-6,-3) be -6/-6?
*March 28, 2010*

**math**

Can someone help me find the two order pairs of this problem.. 5x+6y<30 I have to graph but I am unsure how to find the ordered pairs
*March 28, 2010*

**math**

5x+2y=8 2x+5y=1 is this parallel, perpendicular or niether?
*March 27, 2010*

**math**

I know that is why the question confuses me so the answer is c/9=d?
*March 27, 2010*

**math**

but you dont have C so how do you solve for D?
*March 27, 2010*

**math**

Solve for the indicated letter c=9d, for d I am not sure I understand this question can someone help
*March 27, 2010*

**Math**

Solve 9(w-2)=-18 9w-18=-18 9w=0 w=0 Is this correct?
*March 27, 2010*

**math-multiplying**

3/1 * (6/5) = 3 and 3/5 is this the correct answer?
*March 27, 2010*

**math**

6x-4y=20 and 4y-6x=-20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions
*March 27, 2010*

Pages: <<Prev | 1 | 2 | **3** | 4 | 5 | Next>>