Monday
April 27, 2015

Posts by sophie


Total # Posts: 404

science
how much power, in watts, is needed to cut a lawn in 50 min if the work ivolvled is 100,000 j
November 15, 2009

science
how much power, in watts, is needed to cut a lawn in 50 min if the work ivolvled is 100,000 j
November 15, 2009

science
suppose you are pulling a wagon with the handle at an angle. How can you make your task easier?
November 15, 2009

math
2
November 15, 2009

social studies
why did the us want to build a canal across panama 2 how did the us gain control of the panama canal zone 3 how did the people of panama feel about us control of the canal zone why 4 what agreement did the us make with panama in 1977 5 what are the countries of central America
November 9, 2009

english
were public places segregated in 1948
November 9, 2009

science
what is orbital motion and lubricant
November 8, 2009

science8 intergeted
what is lubricant and orbital motion
November 8, 2009

chemistry, science
Carbon is also removed from the atmosphere during the process of weathering. carbon dioxide combines with water to form carbonic acid. this reacts with calcium silicate (in rocks) to produce calcium ions, bicarbonate ions and silicon dioxide (silica) the chemical equation for ...
November 2, 2009

physics
1008176.54J
October 28, 2009

General Chemistry
Question 1: In the Balmer-Rydberg equation, what value of m is used to determine the wavelengths of the Balmer series? m=? Question 2: List a possible set of four quantum numbers (n,l,ml,ms) in order, for the highest energy electron in gallium,Ga.
October 25, 2009

science
what factors affect the friction forces between two surfeces 2a what is the law of universal gravitation
October 20, 2009

science
1a-b)what are the four types of friction what factors affect the friction force between two surfaces
October 20, 2009

Math Data Management
In how many ways can the 12 members of a volleyball team line up, if the captain and assistsant captain must remain together? Thank you in advance.
September 21, 2009

French
Some interesting facts about the euro tunnel, the eurostar and the shuttle?
September 16, 2009

english
thank u
September 15, 2009

english
Ihave just read me it is a disaster,sorry for the errors
September 15, 2009

english
Dear americans,I would like to retranscribe me the speech of obama in high school in Norfolk (video is on youtube) please make it for a French desperate person (it is my first year at high school) what methods shall I be able to use to understand English better?
September 15, 2009

tech
in tech we are reasearching inventors chefs and designers i chose to research, Gordan Ramsey i have all ready found out most of my info which i need to collect but i am having trouble with, .who is his inspieation. and .why did he become a chef.
September 4, 2009

Trig problems
Part 1) Evaluate tan 7.5 Part 2) Evaluate exactly cos (-(45pi(4)))
August 14, 2009

French 2 help!
okay, thanks, it was right
August 13, 2009

French 2 help!
Jen e veux pas savoir ____ est arrive. a. ce qui b. ce que Je crois _____, je vois, C'est tout. a. ce qui b. ce que I think 1 is a and 2 is b... am I right?
August 13, 2009

Math
In a random sample of 30 tires of the same type, it is found that the average life span is 36,200 miles with a standard deviation of 3800 miles. Find the interval about the sample mean such that the probability is 0.77 that the mean number lies within the interval. a. 35,402-...
July 3, 2009

Math-stats
thanks
July 2, 2009

Math-stats
The playing times of 20 songs on a top-hits radio station are recorded in the chart below. Playing Time (minutes:seconds) 3:32 3:24 2:54 3:07 4:52 3:45 2:39 3:09 3:34 3:26 3:35 4:17 4:03 3:52 5:10 4:59 3:07 4:00 3:07 2:56 In a histogram of this data, which bar would have the ...
July 2, 2009

Math
Use the first five terms of the trigonometric series to find the value of sin pi/12 to four decimal places. a. 0.2618 b. 0.2588 c. 0.7071 d. 0.2648 I got B, is this right?
June 27, 2009

math
I get confused with negatives sometimes! thanks though!!
June 24, 2009

math
Simplify: (-1-2i)+(4-6i) I get 3-8i and 5-8i... confused, which one is it?
June 24, 2009

sience
does anyone know if, orange juice is a pH indicator??
June 22, 2009

sience
ok thanks!! you have been a great help [x]
June 22, 2009

sience
i need to make a p.h indicator in sience but i cant think of any other than.. tea bags, some sort of juice and.. red cabbage anyone got any sujestions?
June 22, 2009

Spanish
Come up with a question to these answers. Si, de Alicante. No, es médica. No, es argentina.
June 18, 2009

Math
Write the standard form of the equation of the parabola whose directrix is x=-1 and whose focus is at (5,-2)? a) (y+2)^2 = 12(x+2) b) y-2 = 12(x+2) c) x+2 = 1/12(y+2)^2 d) x-2 = 1/12(y+2)^2 I get A and D? confused!
June 17, 2009

Math
oohh yes i did! thanks!!
June 16, 2009

Math
oh, so it is C?
June 16, 2009

Math
For 4x^2 - 4xy + y^2 = 4 find θ, the angle of rotation about the origin, to the nearest degree? a) 27° b) 63° c) 333° d) 307° I got A, is this right?
June 16, 2009

Algebra
inead help on math homwork
June 14, 2009

Math
oh! thanks for your time!
June 9, 2009

Math
tan^-1(1/2)=x=.463648 tan^-1(2/3)=y.588003 x+y+pi/2 = -z=2.62245 z=-2.62245 cos (z) = -.868243 and tan a= -1/2 tan b= -2/3 tan (a+b)=(tan a +tan b)/(1-tan a.tan b) so tan (a+b)= -7/4 sec^2 x-tan^2 x=1 so sec (a+b)=√(1+49/16) =√(65/16) (a+b)=1/sec (a+b) so cos(a+b) ...
June 9, 2009

Math
ohh okay thanks!
June 9, 2009

Math
If α and β are two angles in Quadrant II such that tan α= -1/2 and tan β = -2/3, find cos(α+β) Work: cos(α+β) = [ 1 - (tan α)(tan β) ] / [ 1 + (tan α)(tan β)] cos(α+β) = [ 1 - (-1/2)(-2/3) ] / [ 1 + (-1/2)(-...
June 9, 2009

Math
thanks for checking (;
June 8, 2009

Math
Find the measure of the reference angle for 400 degrees. I did the work and got 40 degrees, is this right?
June 8, 2009

Math
Thanks for checking!
June 8, 2009

Math
Find sin(sin^-1 1/4) is the answer 1/4?
June 8, 2009

Math
never mind, i was right
June 3, 2009

Math
Write an equation in slope-intercept form of the line whose parametric equations are: x = (1/2)t +2/3 and y = t - 3/4. a) y = 2x - 7/12 b) y = 2x + 7/12 c) y = -2x - 7/12 d) y = -2x - 25/12 I think it is D.....?
June 3, 2009

Math
thanks for checking!!
June 2, 2009

Math
Find the ordered pair that represents the vector from A(-4.3,-0.9) to B(-2.8,0.2)? Then find the magnitude of AB. A. (1.5,1.1); 3.46 B. (-7.1, -0.7); 7.13 C. (1.5, 1.1); 1.86 D.(-7.1, -1.1); 7.18 I got C, is this right?
June 2, 2009

Math
okay thanks
June 2, 2009

Math
Find an equation of the line that bisects the obtuse angles formed by the lines with equations 3x-y=1 and x+y=-2. a. (3√2 +√10)x-(√10 + √2)y-2√10+√2=0 b. (3√2 - √10)x+(√10 - √2)y+2√10+√2=0 c. (3√2...
June 2, 2009

Math
oh okay, thought so thanks!
June 1, 2009

Math
Find the distance between P(-4,3) and the line with equation: 2x - 5y = -7 a. (14√29)/29 b. 0 c. (-16√29)/29 d. (16√29)/29 I got C but would it be positive, like D?
June 1, 2009

English
well you could do a little of both by saying a catchy sentence and then stating more of the facts
June 1, 2009

Math
no those are the options for sure :/
June 1, 2009

Math
it's B?
June 1, 2009

Math
Use a sum or difference identity to find the exact value of sin225° a. (-√2 - √6)/4 b. (√6 - √2)/4 c. (√6 + √2)/4 d. (√2 - √6)/4 is it A?
June 1, 2009

math
Yes thanks! I got sqrt10/2 also!!
June 1, 2009

math
I did the theorem and got 16/√10 ?
June 1, 2009

math
Find the distance between the lines with equations 3x-y=9 and y=3x-4 a. 5/4 b. (5√10)/2 c. √10/2 d. (13√10)/2 not too sure on this one!
June 1, 2009

Math
so would 2. be C as well?
May 29, 2009

Math
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1. Write a cosine function with phase shift 0 for ...
May 29, 2009

Math
thanks
May 29, 2009

Math
Write an equation of the tangent function with period (3π)/8, phase shift -π/5, and vertical shift -2. a. y=tan((8x)/3 - (8π)/15) -2 b. y=tan((8x)/3 + (8π)/15) -2 c. y=tan((16x)/3 +(3π)/80) -2 d. y=tan((8x)/3 - (3π)/40) -2 I think it is A... or B?
May 29, 2009

math
In triangle ABC, a=7.8, b=4.2, c=3.9. Find B a. 15.1° b. 148.7° c. 78.9° d. 16.2 ° It is D, right?
May 28, 2009

spelling
thank you
May 28, 2009

spelling
If i wanted to shorten the word phenomenal to phenoms would it be es or just s on the end.
May 28, 2009

advanced math
thought so, thanks!
May 28, 2009

advanced math
If 0°<= 360°, solve the equation, sec x=-2 a. 150° and 210 ° b. 210° and 330° c. 120° and 240° d. 240° and 300° I believe it is C. am i right?
May 28, 2009

math (matrices)
Find the values of x and y for which: [2y+5] [x-1] [y - 2] = [ 3x ] is true. a. (-1, -1) b. (-2, -4) c. (5, 1) d. (-1, 4) I got B...?
May 24, 2009

French1
Complete with the correct form of the partitive. -Benoit va au marche. Il achete _____ fromage. would it be du? -Il achete _____ poires. would it be des?
May 8, 2009

French 1
oui, merci
May 8, 2009

French 1
Rewrite the following sentences in the negative. -Je suis de Paris. Would it be: Je ne suis pas Paris. -Michelle est americaine. Would it be: Michelle n'est pas americaine. Am I wrong??
May 8, 2009

grammar
You said either "the" or "those" would be correct. Why was I be marked wrong for using "the"?
May 7, 2009

grammar
I was marked incorrect for using the. Any ideas?
May 7, 2009

grammar
Do you change them to the or those? I think it is the, but I am not sure. Later we cooked them fish and talked about the excitement of the day.
May 7, 2009

grammar
thank you.
May 7, 2009

grammar
Then I would go with no change. Correct? Thanks.
May 7, 2009

french
______ l'equipe ja ponaise a tres bien joue a. Tout b. Toute c. Tous d. Toutes I think it is A? On annonce le de'part de _____ vol? Le vol a destination de Paris? a. quel b. quelle c. quels d. quelles is it A?
May 5, 2009

french
merci beaucoup!
May 5, 2009

french
Le train part _____. a. da la voie b. du chariot c. la queue I think it is A?
May 5, 2009

Calculus
The problem I have is a summation from 1 to infinity for (-1)^n/n. I have to find a partial sum that is in 0.001 of the infinite sum, my teacher says the fourth partial sum approximates the infinite sum, which is -7/12. I think to get within 0.001 of the infinite sum, do I ...
May 5, 2009

french
merci!
May 4, 2009

french
Le train arrive et les voyageurs montent _____. a. sur la voie b. en voiture c. devant la gare d. au kiosque I know it isn't d.... not sure though! Le train arrive Presque toujours _____. a. en retard b. a l'heure c. le matin d. l'horaire is it b....?
May 4, 2009

French
Je descends _____. a. au kiosque b despuis 45 minutes c. au prochain arrete d. a la boucherie I think it is c or b?
May 4, 2009

french
merci!
May 4, 2009

french
Choose the correct noun that matches the stated verb below. Choisir a. la fin b. un choix c. la vue d. un atterrissage Is it b? Voir a. la fin b. un choix c. la vue d. une croyance Is it C?
May 4, 2009

French 1
yes very true! Merci!
May 4, 2009

French 1
So 1 is A and 2 is A?
May 4, 2009

French 1
C'est _____ voie? a. quelle b. quelles c. quel d. quele Is it C? Tu voyages avec ______ compagnie aerienne? a. quelle b. quelles c. quel d. quele Is it B?
May 4, 2009

French 1
merci beaucoup!
May 3, 2009

French 1
Ils regardent les vetements pour hommes dans ______ de la boutique. a. la caisse b. les soldes c. al vitrine d. au rayon I am thinking that it is c or b??? La Martinique est dans la mer _____ Antilles. a. de b. des c. de l' d. de la is it b?
May 3, 2009

Chemistry
I need help with the following problem: A fabric remnant from a burial site had a 14 C:12 C ratio of 0.838 of the original value. How old is the fabric? (half-life of 14 C = 5370 years)
April 29, 2009

English- Medieval Period
this was the only one I missed. Thanks for all help though! It was C. loyalty.
April 23, 2009

English- Medieval Period
it should say all of the above for D So it is D then?
April 23, 2009

English- Medieval Period
This refers to Sir Gawain and the Green Knight Gawain's actions at the castle reveal that the knight's moral code values: a. strength b. courage c. loyalty d. NONE OF THE ABOVE I put B, I am not sure though.... ???
April 23, 2009

Allied Health Graded Project
APA is most common to use. For help you can go to easybib. com
April 22, 2009

Physics
A beam of unknown charged particles passes at right angles to the direction of magnetic field of 9.0x10^-2 T. If the speed of the particles is 3.0 x10^4m/s and the force experienced is 8.64x10^-16N, how many electric charges are carried by one particle? my Work: F = qvB q = F/...
April 22, 2009

Physics
yes, 0.45 T thanks for checking!
April 22, 2009

Physics
A current-carrying wire is oriented at right angles to a uniform magnetic field. If the length of the wire is 0.50 m and it experiences a force of 0.90 N while carrying a current of 4.0 A, what is the strength of the magnetic field? I did the work and got: 0.45 ...???
April 22, 2009

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