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Posts by raj

Total # Posts: 311

physics
A cylindrical glass of radius r=3 cm is full of salt water of height h=10 cm with the water's refraction index changing linearly from the bottom n1=1.401 to the top n2=1.400. A flashlight is positioned so that light shines horizontally onto the glass. If we look at the ...

physics
Two protons and two positrons form a square as shown in the figure. All the particles are initially at rest. Due to Coulomb's repulsion, the particles fly off to infinity. Determine the ratio vp/ve where vp and ve are the final velocities of the protons and positrons, ...

maths
A man is visiting a village where each person either always tells the truth or always lies. There are 5 villagers standing in a row, and the man asks each of them how many of the 5 men standing in the row always tell the truth. Each villager gives an integer answer from 0 to 5...

maths
Find the number of triples of integers a<b<c with a≥−10, such that a(b−c)^3+b(c−a)^3+c(a−b)^3=0

science
A ski jumper launches from a ski jump that is oriented parallel to a hill. The jump has a vertical drop of 50 m and the coefficient of friction μ between the skier and the jump is 0.05. The launch point is 5 m above the hill and there is a small lip at the bottom of the ...

green lawns
With a chemical test differentiate between H2SO4 and H2SO3

fianance
can you check my answers if they are correct thank you 1.) A convertible bond is currently selling for $945. It is convertible into 15 shares of common which presently sell for $57 per share. What is the conversion premium? A. $90 B. $45 C. 57 shares D. 13 shares Answer c 2.) ...

new India
a number is greater than 3 but less than 8.Also,the number is greater than 6 but less than 10.What is the number?

maths --plse help me..
47.2506 = 40+7+.2+.05+.0006 COMPARING WE GET A= 10, D=1 C=.1 , D=100 , E= .0001

math
dicks had a 1 day sale. the original bike price was $325. on sale the same bike was $276.25. what is the percent reduction for this sale?? thxx

Math
A souvenir mug sells for 8 dollars. Kendra gives the clerk 9 dollars and receives 56 cents. what is the sales tax rate? Thx!

Algebra
10 100 3

statistics
6.95 ± 1.96 (.352) =

Math
This is right answer but this step is wrong .

Human physiology
find effective osmotic pressure of normal saline.

AP Physics
A hot air balloon containing an AP Physics student ascends vertically at a constant speed of 8 m/s. While ascending, he accidentally drops his rubber duckie from the gondola of the ballong. Seven seconds after it is dropped the duckie bounces off a roof at point A and hits the...

physics
to find the depth of the water surface in a well, a person drops a stone from the top of the well and simultaneously starts a stopwatch. The watch is stopped when the splash is heard, giving a reading of 3.65 s. The speed of sound is 340 m/s. Find the depth of the water ...

Physics
34.2 meters

Spanish writing
Spanish writing - SraJMcGin, Saturday, August 18, 2012 at 8:49pm Just because the directions say to use the Subjunctive, it does NOT mean to use it everywhere! Your first statement is FACT and therefor there is no Subjunctive! hay muchas, etc. The 2nd sentence says what you DO...

Spanish writing
Thanks for your input! I have made corrections and can you please verify if I have followed the rules correctly? Thanks! En los Estados Unidos hay muchas cuestiones políticas. Creo que hay tres cuestiones principales. Los tres cuestiones principales son: el control de ...

Spanish writing
Could you please check the grammar of my writing assignment. Thank you very much! Discuss your opinions and ideas about three different popular political issues. Include how you think things should be and what you wish certain people would do about it. Articulate your ideas on...

math
a car travels around a horizontal circular track of radius 45m. if the car increases its speed at a constant rate of 1.2m/s starting from rest, determine the time needed for it to reach an acceleration of 1.4m/s. What is its speed at this instant?

math
write a short paragraph on rational nu mber

Math
Find the value of K such that the following trinomials can be factored over the integers: 1. 36x^2+18x+K 2. 3x^2 - 16x+K

statistics
Z=(X<1.5)=0.4332+0.5=0.9332

physics
projectile motion with constant horizontal speed ? A stone falls off a cliff with horizontal velocity v m/s. it falls a distance of 5cm vertically and 200m horizontally in t seconds. when it has fallen a vertical distance of 20cm, what is its horizontal distance from the cliff...

physics
a ball is thrown at an angel of 40 degee above tghe horizontal.the ball clears the fence whis is 85 metre away.what is the inital velosity of the ball if we assume the ball is thrown at the same elevation of the fence

algebra
A man is 4 times as old as his son.After 16 years he will be only twice as old as his son. find their present ages.

math
Qe

english
Are you gonna help

english
cool he likes to play video games and do crazy stuff

english
are you going to reply

english
like what

english
no i want to do fake person

english
i need to write carecter sketch esay nedd help due 1/27/12 friday need help ASAP

math
is some one gona reply

math
Joel has twice as many CDs as Mariella has. Subtracting 7 from the number of CDs Joel has and dividing by 3 equals the number of CDs Blake has. If Blake has 25 CDs how many CDs does Mariella have? Help step by step

Physics
A worker pushing a 35.0-kg wooden crate at a constant speed for 13.7 m along a wood floor does 390 J of work applying a constant horizontal force of magnitude F0 on the crate.Determine the value for F0.

Chemistry
Calculate ∆H˚ for the following reaction using the given bond dissociation energies. CH4 (g) + 2O2 (g) --> CO2 (g) + 2H2O (g) Bond.......∆H˚ (kJ/mol) O-O........142 H-O.........459 C-H.........411 C=O........799 O=O........498 C-O.........358 ∆H...

Math
If a is the greatest common factor of 72 and 48, and if b is the greatest common factor of 108 and 144, what is the least common multiple of a and b

calc
Find all values of x for which the tangent line ot y=2x^3-x^2 is perpendicular to the line x +4y=10?

math
let θ(in radians) be an acute angle in a right triangle, and let x and y, respectively, be the lenghts of the sides adjacent and opposite θ. suppose also that both x and y vary with time how are dθ/dt, dx/dt, and dy/dt related?

Algebra 2
3 5 7 are odd and consecutive-- they add to 15 which is greater than 10 and less than 20.

Calc
let theta (in radians) be an acute angle in a right triangle, and let x and y, respectively, be the lenghts of the sides adjacent and opposite ?. suppose also that both x and y vary with time

Algebra
y- intercept is b in the formula y=mx+b hence your y intercept is 7/2.

Algebra
y=mx+b and m is the slope rearrange the equation so you can find what y equals. in this case you would rearrange it to equal y=-5x/2+7/2. so your slope is -5/2.

Calculus
Assume that x>0 and y>0. If y=5sqrt{x+9} and dx/dt = 2, find dy/dt when x=7.

Algrebra
Please advise on the following: From 1993 to 2003 the cumulative number N of AIDS cases in thousands can be approximated by, where corresponds to the year 1993. N = -2 x2 + 76x + 430, where x = 0 corresponds to. 1) Show how well the equation approximates the data. 2) Rewrite ...

world issuse
Don't kno the answe...pls tell me the answer

math
Probability: 11 out of 29; or 37.9310345%. Method: Take a sample of 100. 45 are men; 40% or 18 men wear glasses 55 are women; 20% or 11 women wear glasses. So out of 100, 18+11=29 wear glasses out of which 11 are women. Probability: 11 out of 29

math
-1/2, 1/7, 2/7, 6/7 Method: Negative (-1/2)is obviously smaller than positives. So that is the smallest. Then arrange the rest in order of the top (numerator), since the bottom (denominator) in each case is the same.

algebra 1-B
how to write 24th march 2011 in 5b letter without using number

geometry
A right triangle has a base that is 2 more than twice the height. Find the length of the base for the triangle. If the area is 30 square units.

MATH !!
could you also tell me what the series will be ? thanks.

MATH !!
n lim(n→+∞)⁡ ∑ (3/4)^k = k=1 the n is supposed to be above the sigma sign and the k=1 is supposed to be below the sigma sign. thanks.

Please Help
the n is supposed to be above the sigma sign and the k=1 is supposed to be below the sigma sign. thanks.

Please Help
n lim(n→+∞)⁡ ∑ (3/4)^k = k=1

Calculus
Use a simple area formula from geometry to find the area under function A(x) that gives the area under the function f(x) = 9 on the interval [2, x].

Calculus
Find all values of x, where the graph of y = [(5x^3)-(6x)+(8)] / (x^2) crosses its oblique asymptote.

Calculus
Find all values of x, where the graph of y = [(5x^3)-(6x)+(8)] / (x^2) crosses its oblique asymptote.

calculus
use the definition of the derivative to calculate f'(x), if f(x)= SQRT(2x) and find the equations of the tangent line and the normal line to the graph of f at x=2

Physics-work,power,energy
A 20 ton truck is pulling a 5 ton trailer.their common uniform velocity is 54 kmph.if the frictional force is 20N per both the truck and the trailer then power developed is?

Chemistry
0.2M

algebra 1a
Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb mixture that is 10% protein? Cornmeal-how many pounds:__________ Soybean meal-how many pounds:______

Math
Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb mixture that is 10% protein? Cornmeal-how many pounds:__________ Soybean meal-how many pounds:______

English-please help
To bring to your organization enthusiasm, dedication, responsibility, and good work ethic, combined with a desire to utilize my skills obtained through work experience. Is that correct sentense??

English-please help
I am reliable dishwasher seeking for a position of dishwasher where I can use my previous dishwashing experience for a leading restaurant. Is that correct sentense??

English-plese hepl
I am reliable dishwasher seeking for a position of dishwasher where I can use my previous dishwashing experience for a leading restaurant. Is correct sentense??

math
So i was working in the office with Matt today and he said the funniest thing. He said if you get 1 stick and hit a bird with it two birds will appear! But if you hit the two birds with 2 sticks a pineapple with appear. But if you eat the pineapple you will become the ...

Mathematicas
3B+3S

Physics
The small archerfish (length 20 to 25 cm) lives in brackish waters of Southeast Asia from India to the Philippines. This aptly named creature captures its prey by shooting a stream of water drops at an insect, either flying or at rest. The bug falls into the water and the fish...

chemistry
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2 I am not sure where to even begin on this problem.

CHEMISTRY
What is reaction between HI+HNO3

English
ut the words in correct sentence order. If necessary, change the form of the simple verb in boldface. Be sure to begin each sentence with a capital letter. Pay attention to the final punctuation. 1)be no, she. 2)don't no, you.

English
to Steve go City College. Steve goes to city college.is that right?

English
Put the words in correct sentence order. If necessary, change the form of the simple verb in boldface. Be sure to begin each sentence with a capital letter. Pay attention to the final punctuation. 1)be we library the in. 2at college be she the? 3)be no, she. 4)be he late ever ...

probability
1/36

chemistry
a 500 ml portion of .0020 M Na2C2O4 solution is able to dissolve .47g of MgC2O4. What is the Ksp for MgC2O4

Social Science
Can anyone help me get some points? What can the Church do today to make itself more relevant to Generation X?

Algebra Honors
The length of the base of a triangle is 4 times its altitude. If the area the triangle is 162 cm2, find the altitude.

Chemistry
PartA: What volume of 10.0M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? TrisHCl is a weak base and the molecular weight is 157.67 g/mol. I found the solution, it is 6.67 milliliters. The main question is:Part B: "The buffer from Part A ...

CHemistry
45.00 mL of 1.55×10^−2 M HI(aq) is mixed with 85.00 mL of 1.08×10^−2 M KOH(aq). What is the pH of the solution?

Chemistry
What is [H3O+] in a solution obtained by dissolving 215 mL HCl(g), measured at 23 degrees C and 757 mmHg, in 4.30 L of aqueous solution?

Chemistry
can u tell me what your final answer is? I got 7.96 * 10 ^5 ml.

Chemistry
thnx

Chemistry
How many millimeters of this solution should be diluted with water to produce 650 mL of a solution with pH= 11.50? 6.8% ammonia (d= 0.97g/ml)

Chemistry
I thought for the density, the calculation would be as follows: 0.15gKOH/g---> 1g of solution, density=1.14 g/ml.......0.15g/(1g/1.14g/ml) to get 0.171 g/ml. and then I thought molarity for [OH^-] was 2.51 * 10^-3. The proper set up I got like 3.66 g/? mL. I might be wrong...

Chemistry
How many millimeters of a 15.0%, by mass solution of KOH(aq)(d = 1.14 g/ml ) are required to produce 26.0 L of a solution with pH = 11.40?

Chemistry university level
what mass of ethylene glycol, the main component, of antifreeze, must be added to 10.0 L water to produce a solution for use in a car's radiator that freezes at -23.3 degree C? Assume the density for water is exactly 1 g/ml.

chemistry
what is the lewis dot structure for SO4 -2 and the ideal bonds, mollecular structure and hybrid orbitals?

Organic Chemistry
i am not able to get the proper name but i can tell the structure i.e. ch3 ch3-ch2-ch2oso3

chemistry
the wander walls force of attraction increases,it become more stable and it requires less energy.

Chemistry...Please Help
GK, why don't you write the concentration of water for (e)?

Statistics
The percentage of adults who have been told at some point that they have hyptertension is 23.53%. If 10 adults are randomly selected, what is the probability that at least 8 have been told that they have hypertension?

Chemistry
Draw the Lewis structures for BrO3- and ClO4- and indicate their correct number of additional resonance structures. I'm a little confused about this. For example, I've got the correct original form of BrO3- down. Where all 3 O atoms are single bonded to Br, and the Br ...

history
I need information on Bull Capital Rampurva Maurya 323. thank you

Chemistry
Can someone please explain to me whats the difference between a buffered and non-buffered solution?

Chemistry
Yes I know it will be m=1. But what if I have something like log (base 1/4) 0.33 = m Then how would I solve something like that.

Chemistry
I haven't calculus in a while. So can someone please help me with this, its for rates: log (base 1/4) 0.25 = m I know that m = 1, but how would I solve for it using the log method.

Chemistry
I need help distinguishing between nucleophiles and electrophiles. Like one of the examples I am given shows methanal, chloroethane, and methanamine. Now it says methanal is electrophilic because the carbonyl group is polar since the more electronegative oxygen atom has a ...

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