# Posts by K

Total # Posts: 928

Science
180

physics
A projectile is launched with a speed of 41 m/s at an angle of 60° above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight. m

math
ko

biology
which characteristic makes birds diffrent from all ather vertebrates?a.they can fly or b.their feathers. b right

biology
eye color is not an example of a trait.false

biology
bacteria is a form of prokaryotic cells,cells that have no nucleus . true right

earth science
where do most earthquakes take place? the equator,near oceans,everywhere,a fault line. #4 right

earth science
oceanography is one of the oldest sciences. false right

geometry
find the area of triangle if the sides measure b=12in ;h=18in. 108 right

geometry
find the area of a rectangle if it measures L=9 in and W=7.my answer is 63 in.

geometry
find the area of a square if each side measures 10 cm. my answer is 100 cm

English
(1) We decided to climb Mt. Rainer, but it was a long, hard journey to Washington State from Medford, Oregon. (2) We were worried about our likely sucess in the cold enviroment of the upper slopes. (3) For one thing, Marty was broke and anxius about having warm clothes for ...

Physics
Two adjacent corners of a square have charges q1 = +1.5 x 10-9 C and q2 = +4.0 x 10-9 C. The length of a side of the square L = 0.25 m. Find the EPE of a charge q3= -6.0 x 10-9 C placed at the 2 remaining corners.

english
how about these two Crocodiles,quiet as logs,lurked on the riverbanks. Large and small dinosaure,stalked the grassy plains.

english
Detective Homer Fry and jenine Small looked high and low for clues. Cory drove to middleton in his search for Eloise. Dose one of these sentence have simple subject also be its complete subject.

English
i still didn't get it is the subject you or the shoe shop. even the other one i didn't get it

English
in which sentence dose the subject comes after the verb? A.On the next street,you'll find the shoe shop. B.Where is my Elvis CD?

physics
kjkjn

205
1 b 2 c 3 c 4 c 5 b 6 c 7 c 8 c 9 a 10 c 11 b 12 c

DUE AT MIDNIGHT: HELP ME!!
The only thing that is SUPPOSED to be in your urine is about 95% water, and 5% dissolved salts, organic wastes and hormones. if you have protein in your urine, you have a problem!

english
if not where should i make changes

english
i need to know if my paper is in order and is grammatically correct. Symbolism, 1the use of symbols to invest things with a representative meaning or to represent something abstract by something concrete, is used in novels and stories by authors worldwide. Why do authors ...

math
noooooooooooooooooooooooooooooooooo

SCI
Jacque earns \$7.20 per hour (h). For overtime (each hour over 40 hour) he earns \$10.80 per hour. If he works 54.5 hour in a week, what pay should he receive?

Physics
(89)(3500)(1.4)=M(2.42E^6) 436100=M(2.42E^6) M=.180

Chem
Which compound is the weakest base: a) aniline b) 4/para-bromo aniline c) 4/para-nitroanilinie d) 4/para-methylaniline Would "c" be correct??

science
I cool air would have higher pressure than warm. Warm air is less dense than cool air &, therefore, it would have a lower pressure than cool air. Warm air also rises more quickly b/c it is less dense.

English
In spite of/most is a comparative rhetoric- Suzuki lets us know how little we know of the surrounding environment (vast also alludes to subconscious if you want to get philosophical about our disconnection to nature) You're right about the thesis(but who knows why you ...

Urgent! for Chem
what is it that you are looking for specifically? Try asking for "drwls"...he may be able to help with this one.

Chem Urgent!
for the reactants you have N=1 & O=4. for the products you have N=1 & O=4.

Chem Urgent!
it is balanced

Help needed for Chem!
Na + Cl_2 -> NaCl 2Na + Cl_2 -> 2NaCl =2 Na of reactants & 2 Cl on reactants side =2 Na on prod. side now & same for Cl Try that.

got it. Thank you for you help. I don't know what i was thinking when I wrote down my answers to which is the best leaving group, but least to easiest. I meant to write them both a beginning with F, Cl, Br, then I. Back to that other question, re: MAJOR product formation. ...

or even just: Is it still okay to conclude a formal essay using something like: "Thus, in conclusion, ..."; or, are there much better/higher levels to go about writing a proper conclusion...or even just a basic thesis stmt?

Tomorrow I am to write a formal persuasive essay of up to 500 words ONLY, within ONE hr ONLY, as a written portion of an application. We are to be given a passage & then are to respond with a formal persuasive essay in response to a following given proposition arguing for or ...

Please check these out for me, if I am correct: Match the following statements with SN1 or SN2 reactions: 1) The order of reactivity in alkyl halides is methyl>primary>secondary>tertiary 2) There is an intermediate carbocation 3) The rate-limiting step involves the ...

by the way K
just saw it - thank you.

for: drwls -Dr.Russ
Is there a 'Dr.Russ' that can help with Organic Chem?

Chemistry
molecular compounds

thank you

Thank you...good to know, but isn't there a "Dr.Russ" that works with Organic Chem??

Arrange the compounds in the order of increasing boiling point ***(LOWEST first): 1) H3C-O-CH3 2) H2O 3) CH3CH2OH 4) CH3CH2SH I think the order should be: #1, 4, 3, 2 Arrange the following in order of increasing rate of reactivity with conc.HBr ***(LEAST first). a) ...

christina &/or Dr.Russ
So do these look to be as though I am on the right track with my answers to the above questions??? Except, for the FIRST question...I think that #3 should be SN2, rather than SN1 (substitution reactions).

Please check these out for me, if I am correct: Match the following statements with SN1 or SN2 reactions: 1) The order of reactivity in alkyl halides is methyl>primary>secondary>tertiary 2) There is an intermediate carbocation 3) The rate-limiting step involves the ...

CHEM
Thank you for all of your information! So then I believe that the answer "should" be: "C" (3-methyl-1-cyclohexene) b/c then the double bond would link to where the Br was originally & flip backwards..."a" (1-methyl-1-cyclohexene) could be a "...

CHEM
so then "B" as the "Major" product? -the cyclohexane with the double bond off from it & then the "CH2" attached at the end? What is the correct name for this compound anyways?!

CHEM
<cyclohexane>=CH2

CHEM
( "B" is meant to read as a cyclohexane with a double bond off of one carbon & then a CH2 at the end of that)

CHEM
What is the major product from an elimination reaction starting with 2-bromo-1-methylcyclohexane? would it be: a) 1-methyl-1-cyclohexene b) a cyclohexane/ene with a double bond off of one C - basically the cyclohexane shape with =CH2 off of it (I don't remember the actual ...

social studies

apa formatting
take out "Making" at the beginning, also. Just begin with "The decision". Take out the comma I put in after children & before will in the 2nd sent.

apa formatting
Making the decision to return to school was not an easy decision; however, returning to school will create a better future for my family and I. Although seeking to attain a college degree while having to work full-time and raise children, will be a defininte challenge, this ...

CHEM - PLS help!!
Thank you both of you for your help.

CHEM - PLS help!!
The experiment is on dehydration of an alkene & then to test it to see if it is "unsaturated" or "saturated", which I really should have specified!!...sry!!!! For this exp. we are to only have like 3 drops of the Br in CH2Cl2 & add in 1-2 drops of ...

CHEM - PLS help!!
cyclohexanol: OHCHCH_2CH_2CH_2CH_2CH_2 (I think that is sort of it, otherwise.) Or just: C_6H_11-OH

CHEM - PLS help!!
(note: cyclohexanol is a hexagon with an "-OH" attached off one of the carbons.)

CHEM - PLS help!!
What would the equation look like if you added bromine (Br) in the presence of CH2Cl2 (Dichloromethane) to cyclohexanol (C_6H_11 OH). Would the solution become saturated or not??? What would the colour change be...if any?? Would a precipitate be formed?? Same as above if you ...

answer for the first was "3"

How many stereoisomers are there for 1,2-dichlorocyclopentane?: a) 1 b) 2 c) 3 d) 4 answer: "B" (2)??? or: "D" (4)??? How many stereoisomers are possible for: cortisone acetate?: a) 32 b) 64 c) 128 d) 256 answer: "B" (64)??? How many stereoisomers...

Organic Chemistry-pls check
"A" was correct

Organic Chemistry-pls check
I think that it must be "a", too, when I rethought it. Thank you.

Organic Chemistry-pls check
Which is the major product from acid catalyzed hydration (addition of water) of 2-methyl-2-pentene? a) 2-methyl-2-pentanol b) 2-methyl-1-pentanol c) 2-methyl-3-pentanol d) 3-methyl-3-pentanol answer: "c": 2-methyl-3-pentanol ???

Organic Chemistry
ignore this post.

Organic Chemistry
should it be: 2-chloropentane & 1,2-dichloropentane??? ie. "D" ??? I don't think that it could be "I or III"

Organic Chemistry
I am really not certain on the following question: Which compounds contain stereocenters?? I) 1-chloropentane II) 2-chloropentane III) 3-chloropentane IV) 1,2-dicloropentane a)-> I, II b)-> III, IV c)-> I, III d)-> II, IV I) 1-cloropentane has sterocenters...right?

Organic Chemistry
ignore this post.

Organic Chemistry
I just want to check if I am correct on this Q: What is the major product formed when 1-butene reacts with water in the presence of dilute sulphuric acid? a) 1-butanol b) 2-butanol c) butane d) 1-methylpropanol I "think" that it "should" be "B" (2...

Chemistry
I'm struggling with this homework question: Draw all possible isomers you can for C4H8O2. So far I have three esters and butanoic acid, is that correct? I'm not sure if I completely understand this question.

Factor 5A^4 - 5A

MATH
Factor 5A^2 - 5A

Chemistry
Do impurities raise or lower the property of an organic compound such as lower or raise an equivalent weight?

English Grammar
always should be an adverb...describing what the action is which is the verb "late". Try that, it "should" be correct.

CHEM
I did manage to get as far as the 380.5pm's. I guess where I did go wrong is that I missed carrying it further than that. I missed the 380.5*sqrt 2=538.1pm's & then the remainder of the answer. Thank you very much. It's good to know that I was getting the handle of...

CHEM -DrBob222 if possible
I ran out of attempts but I still would like some help trying to figure out how to do this question properly, please.

CHEM -DrBob222 if possible
I tried exactly what I had done with the above & got my answer to be: 190.2pm's & was still wrong!! Could you please guide me as to what I should be doing? I only have 2more attempts left at the question.

CHEM
I think that I used Robidium's atomic mass instead of Rdodium's...I'll check now if that works better. Does it look as though I am on the right track though??

CHEM
oh yes...the answer should look like this: r = _____pm

CHEM
Rhodium has density of 12.41g/cc and crystallizes with the face-centered cubic unit cell. Calculate the radius of a rhodium atom. xpress your answer using four significant figures. For this question I tried to calculate backwards from a previous question I had asked this past ...

CHEM****DrBob222
this worked out perfectly!...thank you...that was the last question for the year that I had to finish through that program. I really must not have been paying attention with "a*2", as opposed to dividing a/2 to solve for "r". Thank you again, & for having ...

CHEM****
& for #2 (with the gold/Au): Volume = (407pm)^3??? = 67,419,143 (or: 6.74 * 10^7)?? then does 6.74*10^-7pm's translate to: 6.74*10^+10 cm's?? Then go something like: (4 atoms)(196.967g/mol Au)/6.02*10^23 atoms mol-1 = 1.30875*10^-21 g?? Then density = mass/volume: d = ...

CHEM****
Initial info: The atoms of crystalline solid pack together into a three-dimensional array of many small repeating units called unit cells. The simplest of the unit cells are those that have cubic symmetry, with atoms positioned at the corners of a cube. Atoms can also be found...

math
3/5 = x/15 find the common denominator which will be "15" then, since you multiply the "5" by "3" to get "15", then you must multiply the top, numerator, by the same. Therefore: 3*3 = "9" If you had: 4/5 to get a full set of 15...

Language Arts/Capitalization
I would go for capatilizing the "C" on "Club" in this case. If you are saying: "I attended a Christian club," then the "c" would be lower case. However, if you are saying: "I go to Christian Club," then I "believe" ...

Math
perhaps attempt to show him some practical/real world examples where understanding simple division is a tremendous asset. Go over dealing with \$, that may get him interested...or find something that he is a huge fan of & somehow apply division to that. You could also make up ...

English
Thank you for your time and attention in this matter.

CHEM
Info: The atoms of crystalline solid pack together into a three-dimensional array of many small repeating units called unit cells. The simplest of the unit cells are those that have cubic symmetry, with atoms positioned at the corners of a cube. Atoms can also be found in the ...

CHEM
I will send a msg to the site & see what I receive back. I figure that D should have been correct initially, but I picked C instead by accident...it came up with the feedback stmt & I got more confused.

CHEM

CHEM
You are a researcher for a golf club manufacturer. You are given two identical looking cubes of a metal alloy. You are informed that they are made of the exact same material, but one is a crystalline, while the other is amorphous. It is your job to determine which one is ...

CHEM
I tried drawing as this & it turned out to be correct. Thank you very much!

CHEM
is trigonal planar bent though? or would it basically look just as you have it, but with 2electrons on top of the "O" & 2 on the bottom of it? & then 6/3pairs of electrons around the "Cl". or...being as how these structures are way too hard to type out: the...

CHEM
One other question that I am really not 100% sure on: how do I draw the electron-dot structure for: CHClO. I "think" that CHClO is a trigonal planar molecule, with the central atom being carbon. Is this correct?

CHEM
yes...I guess they were looking for #3.

CHEM
If the four F atoms are in the equatorial positions and the two Cl atoms are axial, all polar bonds cancel. This is what it said when I had tried "always polar"...I had selected the wrong answer. So...it is either then, as I had originally thought: "always non-...

CHEM
Which statement best describes the polarity of SF_4Cl_2?? (or: SF4Cl2, if that helps more) 1. Always polar. 2. Always nonpolar. 3. Depending on the arrangement of outer atoms, this molecule could be polar or nonpolar. & how can you tell for certain??? I think that it might be...

CHEM

CHEM
Ok...I really don't have much of a clue now. "f" was also incorrect. So...does this problem need me to add 120-degrees in there then as well: "e"- 90, 120, & 180...or am I seriously still way off!!!

CHEM
I tried for "d" 90-degrees only & it stated the following: Also consider the angle between the equatorial atoms. would this then be: "f" 90 & 180 degrees?? I don't see where 120-degrees plays in this structure & I am obviously missing another to add to ...

CHEM
What are the expected bond angles in ICl4+ (or) ICl_4^+ ?? I think that I have the stucture drawn correcty: I is the central atom with one lone pair above it. I then have the Cl's with 6dots around them & then bonded, singly, to the "I". Two "Cl's" ...

1. Pages:
2. <<Prev
3. 1
4. 2
5. 3
6. 4
7. 5
8. 6
9. 7
10. 8
11. 9
12. 10
13. Next>>

Post a New Question