Friday
October 21, 2016

# Posts by Neha

Total # Posts: 126

physic
a cold drink bottle of 500 ml weight 25g .when a liquid is filled in it ,it weight 80g .find the density of liquid .
October 19, 2016

s.g (math)
if a triangle with sides 12 unit and 5 unit is inscribed in a circle with BC as diameter, then find the value of sin square theta +cos square theta -1
September 10, 2016

real analysis
Arbitrary union of closed set is closed Prove or disprove
August 27, 2016

real analysis
Closure of the set of irrational number is phi
August 27, 2016

mathematics
2cosx=√2+√2+2cos4x
August 1, 2016

math
A park is in the form of a rectangle 100 m×80 mat. At the centre of the park there is a circular lawn. The area of the park excluding the lawn is 4150 m^2 find the radius of the circular lawn
June 7, 2016

math
a body is projected at an elevation alpha with a velocity of 9.8m/s in what time Wii be direction of motion be alpha/2?
May 7, 2016

math
Roger buys six 1.5- litre bottles of fresh juice. he distributes 20 cl of juice to each of his pupils. calculate the number of pupils in his class if 600 ml is left.
May 2, 2016

physics
A river flow of width 100 m is flowing with velocity of 1.5 m/s .A man start from one end with rest relative to river .He raws with an acceleration of 2 m/s^2 relative to the river if the man want to cross river in minimum time by how much distance will he be drifted in the ...
April 13, 2016

Stats/Probability
If 23% of the cars that pass by your house each day are red, 12% green, 4% yellow, and 31% black; what is the probability the next car to pass your house will be red or yellow? (Assume every car is only a single color). I have to pick which formula to use. These are the ...
February 20, 2016

math
In a test which had 30 questions carrying 1 mark each ajay scored 60persant marks. How many questions did he answered correctly
December 8, 2015

science
How food travels through various compartments
July 17, 2015

math
What should be added to (2/3+3/5) to get -2/15
July 8, 2015

math
Evaluate 6/7-2+-7/9+19/21
July 8, 2015

maths
Solve and verify 7/x+35=1/10
July 8, 2015

maths
Solve : 1/x+1+1/x+2= 2/x+10
July 8, 2015

math
The product of two rational numbers is -28/81 if one number is 14/ 27 find the other
July 8, 2015

maths
The sum of two opposite angles of a parallelogram is 130 find all the angles of the parallelogram
July 8, 2015

maths
Abcd is a rectangle with <bac= 32 determine<dbc
July 8, 2015

math
Shreya walks 2/3 km to her school and rosy walk 3/4 km to the school who has to walk a longer distance to reach the school and by how much
July 5, 2015

Maths
A hand fan is made by stitching 6 equal size triangular strips of two different types. The dimensions of equal strips are 25cm, 25 cm and 14 cm.Find the area of each type of paper needed to make the hand fan.
June 18, 2015

physics
What is the value of current when charge of 5 uc paases through a conductor in 2seconds
May 22, 2015

chemistry
when x gram of carbon is completely burnt in certain amount of oxygen y gram of carbondioxide is form.what mass of Co2 will be produced when 2x gram of carbon is burnt in z gram of oxygen. which law of chemistry will help me to find the answer
November 6, 2014

Physics
An ant climbs onto the side of a bicycle tire a distance of 40.0 m from the hub. If the 0.010 g ant can hold onto the tire with a force of 4.34*10 to the -4, at what frequency would the tire fling the ant of assuming the wheel is spun on a horizontal plane? so what I did for ...
November 2, 2014

Physics
Determine Centripetal Acceleration acting on the person standing at the equator? (the radius of earth is given)
November 2, 2014

math
Yasmin wants to serve 150ml of juice to each of 15 guests. How many 500ml cartons of juice she buy? How much juice will she be left after serving her guests?
September 22, 2014

Physics
An airplane has an airspeed of 770 kilometers per hour at a bearing of N 48 degrees E. If the wind velocity is 28 kilometers per hour from the west, find the angle representing the bearing for the ground speed? I found Rx and Ry which are 543.23 and 572.22 respectively. To ...
September 3, 2014

algebra
22<40-18t<31 subtract 40 from all sides and then divide by -18. Flip the signs afterwards.
September 3, 2014

ENGLISH
can someone read my english essay and correct it for me?
August 28, 2014

math
There is no underlined digit
August 28, 2014

statisticsmath
0.2534,48.095
August 21, 2014

quantitative techniques
full solution od this question
August 9, 2014

Physics
An object of mass 0.5 kg is whirled at the end of a string 0.8 m long.If the string makes three revolution in 1.2 s,find the tension in the string.
July 18, 2014

science
an aircraft travelling at 600km/hr accelerates steadily at 10 km /h every second. Assuming speed of sound is 100 km /h t the aircrafts altitude , how long will it take to reach the sound barrier
April 23, 2014

proposal writing for high school english
how to write a proposal in brief for a 10 marks question? What structure should be followed for just 10 marks?
September 30, 2013

chemisry
Q2. Distinguish between the following- 1. CH3OH and C2H5OH 2. Phenol and methanol 3. 1-Propanol and 2-Methyl-2-propanol 4. Ethenol and 1-propanol 5. Propanol and propanone 6. Acetaldehyde and benzaldehyde 7. Benzaldehyde and benzoic acid 8. Propanoyl Chloride and propanoic ...
July 7, 2013

Math
When doing translation you have to write for example A(1,1) then when you write it you write A'(2,2) how would you write it to the fourth. Would you tally or do Roman numerals
December 10, 2012

Math
determine the value of k for which the fuction f(x)=4x^2-3x+2kx+1 has 2 zeros.
October 21, 2012

Math
hi in which standard r u , its just a simple sum , that means a very stupiod person is trying it out , but well i am the topper of the class i know this question well i am neha
September 15, 2012

math 12
A)a shed, in the shape of a square based prism, is to have volume 800meters cubed. determin the dimentions of the shed, with the minimum surface area. B)how would the answer change if the minimum surface area did not include the bottem of the shed? explain.
September 14, 2012

math
find the volume of cube,one face of which has an area of 64 m square
July 14, 2012

math g 11
the kwans will need \$50,000 in 3years to expand their business. what is the equivalent value today if inflation is projected to be approx 3.5% per year compounded anualy
May 15, 2012

at giant tv sales, you can chose between 2 payments options for a new tv. 1st option is 2 pay \$2399.99. 2nd option is to pay a \$399.99 downpayment plus \$2200.00 after one year. if interset is 4.2% per year, compunded quarterly, wich option is a better deal
May 15, 2012

physics
1.1multiple10mines cube
February 15, 2012

Chemistry
What you can predict about a reaction whose activation energy is zero?
February 6, 2012

Chemistry
On the basis of MOT, explain why the stability of N2 decreases on ionization but the inverse is true for O2.
February 6, 2012

Chemistry
Why Energy of is smaller than π2px and π2py in case of O2 but it is opposite in case of N2.
February 6, 2012

Chemistry
Determine the mass of CuSO4.5H20 needed to make 100.00mL of a .100M CuSO4.5H20 aqueous solution..
February 2, 2012

application of derivatives
The radius of an air bubble is increasing at what rate is the volume of the bubble increasing when the radius is 1 centimetre?
January 3, 2012

chemistry
What is the largest amount of H2O in grams that can be formed when 5.70 g of H2 reacts with 5.70 g of O2, based on the balanced reaction below. 2 H2 + O2 2 H2O
November 26, 2011

physics
the magnitude of 2 vectors are 4 and 5 units and the angle b/w them is 30,taking first vectoron x-axis.find the magnitudeof resultant vectorand its direction?
November 24, 2011

Chemistry
2 NO + O2 --> 2 NO2 The reaction rate is increased five­fold when the temperature is  increased from 1400 K to 1500 K. What is the activation energy for the reaction?&...
November 16, 2011

Chemistry
The iodide ion can be oxidized in an acidic solution by hydrogen peroxide. One proposed mechanism for the reaction is as follows: Step 1: H2O2 (aq) + I-(aq) → H2O (l) + OI-(aq) slow Step 2: H+(aq) + OI-(aq) → HOI(aq) fast Step 3: HOI (aq) + H+(aq) + I-(aq) → ...
November 13, 2011

Physics
I saw a video in class that only had the backwards ball involved, and the backwards ball didn't move at all. So I'm wondering what the effect of the forward ball does to the problem.
October 27, 2011

Physics
You are riding on a flatbed truck moving at 50 kilometers per hour. You have two identical guns, one aimed forward and one aimed backward, and you fire them at the same time. According to an observer in the ground, 1. the backward bullet appears to move faster. 2. they both ...
October 27, 2011

Chemistry
Rank the following solutions in order of increasing acidity. 1 M phenol 1 M boric acid 1 M cyanic acid 1 M formic acid 1 M hydrochloric acid 2. Rank the following solutions in order of increasing basicity. 1 M C3H5O3Na 1 M KF 1 M KOCN 1 M KOCl All I know is that HCl is the ...
October 23, 2011

Physics
A high diver of mass 69.4 kg jumps off a board 9.6 m above the water. The acceleration of gravity is 9.8 m/s2.If his downward motion is stopped 2.21 s after he enters the water, what average upward force did the water exert on him? Answer in units of N
October 15, 2011

Physics
that's what i did before, and it's still wrong
October 13, 2011

Physics
October 13, 2011

Physics
I know that coefficients generally don't exceed 1, so I have no idea what to do
October 13, 2011

Physics
i got 26.95...seems high
October 13, 2011

Physics
oh wait nvm it can be N b/c force of gravity = weight
October 13, 2011

Physics
Sorry where it says ik it should be the microsign and then k
October 13, 2011

Physics
A box of books weighing 303 N moves with a constant velocity across the floor when it is pushed with a force of 400 N exerted down-ward at an angle of 38.6 degrees below the horizontal. Find ìk between the box and the floor. Well I know that I have to use netF = ma, so ...
October 13, 2011

physics
so Fg = 75*9.81 = 735.75 N Fnet = ma Fair - Fg = ma 96 - 735.75 = 75 * a a = -8.53 m/s2 Vf2 = Vo2 +2ax Vf2 = 0 + 2(-8.53)(-30) Vf2 = 511.8 Vf = -22.63 m/s //neg b/c downward direction
October 11, 2011

physics
A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.???
September 13, 2011

physics
A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.
September 13, 2011

numericals
A 100g bullet is firred from a 10 kg gun with a speed of 1000 m/s.What is the speed of recoil of the gun.
September 12, 2011

Physics
1. Question: Consider two planets with uniform mass distributions. The mass density and the radius of planet 1 are p1 and R1, respectively, and those of planet 2 are p2 and R2. What is the ratio of their masses? Ans: M1/M2 = (p1/p2)(R1/R2)^3...I got this answer correct. I need...
August 28, 2011

Chemistry
But I thought that CO2 could be like O=C=O, O-C=-O, and O=-C-O. Thank you though, for your input. :) I'm sorry about just posting the questions again.
August 11, 2011

Chemistry
Sorry. Well, I know that CO2 has resonance forms, but SO3 and HCO2 have resonance forms too. So that's why I don't get which one is the answer because all of them have resonance forms. I guess I just don't understand the "hybrid" part of the question, ...
August 11, 2011

Chemistry
Which of the following substances exist(s) as a resonance hybrid? CO2 (g) SO3 (g) HCO2- (aq) A. I only B. II only C. III only D. I and II only E. II and III only Ans w/i 12 hrs please!!
August 11, 2011

Chemistry
I got 2.67 and 5.33 (b/c I did 3x = 8 atm (2x for NH3 and x for N2). Is that on the right track?
August 10, 2011

Chemistry
Thanks for question 1. So what would the partial pressure be for the gases?
August 10, 2011

Chemistry
Nitrogen and hydrogen, with volumes of 12.0 L each, are injected into a sealed rigid reaction chamber containing a catalyst. The pressure of the chamber is 8.00 atmospheres and at a known temperature. The reaction is allowed to proceed to completion while being maintained at a...
August 10, 2011

Chemistry
92.01 grams of N2O4 (g) is placed in a container and allowed to dissociate. N2O4 (g) --> 2NO2 (g) The mixture of N2O4 and NO2 resulting from the reaction occupies 36.0 liters at a total pressure of 773 mmHg and 45 °C. A. Let x equal the moles of N2O4 that dissociate. ...
August 4, 2011

Chemistry
For each compound, draw a line structural diagram of all isomers. Identify the kind(s) of isomers illustrated. A. CH3CH=CHCH3 B. C3H7OH C. CHIFCl
July 27, 2011

Chemistry
What type of isomers are [Pt(NH3)2Br2]Cl2 and [Pt(NH3)2BrCl]BrCl? A. Structural B. Geometric C. Linkage D. Coordination E. Optical
July 27, 2011

Chemistry
Ok. Thanks once again!
July 14, 2011

Chemistry
But one of these has to be the answer.
July 14, 2011

Chemistry
You want to determine the molar heat of solution of sodium chloride using a 10.0 g sample of NaCl(aq) and 50.0 mL of water in a coffee cup calorimeter. Which of the following equations would you use? Assume the specific heat of the solution is the same as the specific heat of ...
July 14, 2011

Chemistry
Thanks!
July 10, 2011

Chemistry
In regards to DrBob222, there were 3 parts to this question; the first part said there were .1952 g and the mols were 2.504 * 10^-3 mol. But I don't know if this part refers to the first part because it doesn't sound like it does.
July 10, 2011

Chemistry
2NaF + CaCl2 ¨ CaF2 + 2NaCl An excess of 0.20 M NaF is used to precipitate the calcium ions from a 50.0 mL sample of a calcium chloride solution. What is the concentration of the original calcium chloride solution?
July 10, 2011

chemistry 101
8.75/34.02 (molar mass of H2O2) = .257 mol H2O2 Since the mol ratio b/t H2O2 and O2 is 1:1, there is also .257 mol O2 .257 mol * 6.02 * 10^23 = 1.55 * 10^24 molecules so the 3rd option.
July 8, 2011

AP Chemistry
2 Al + 3 Cu(NO3)2 --> 2 Al(NO3)3 + 3 Cu 1. Write balanced equations for the oxidation and reduction half-reactions. Identify each half-reaction as oxidation or reduction. 2. In the balanced overall reaction, determine which is the oxidation and reduction agent. 3. Which ...
June 24, 2011

Science
SORRY # 3 DOESN'T COUNT!!!
January 17, 2011

Science
1. I got a list of solutions. We did a test in the lab to figure out what was there pH. How do you figure out which one is the most acidic and the most basic? 2.When might you need to know whether a solution is acidic or basic? 3. Dishwasher detergent, oven cleaner, and drai
January 17, 2011

PreCalc
A contractor plans to build an artist's studio with a roof that slopes differently on the 2 sides. On one side, the roof makes an angle of 33 degrees with the horizontal. On the other side, which has a window, the roof makes an angle of 65 degrees with the horizontal. The ...
January 3, 2011

chemistry
The right answer is b. OH- and SO32-
April 23, 2010

maths
The mean of 10 observations is 21. If each score is divided by 3, find the new mean.
March 17, 2010

chemistry
A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 is 1.577g. what is percent by mas of water in the hydrated calcium sulfate salt
February 9, 2010

social studies
Between 1935 and 1957, a period that included World War II, the birth rate rose from 16.9 to 25 per 1000 people. What was the most likely cause of this "baby boom?"
January 6, 2010

ex; 6o/10 = 30/5 20/40=10/20
October 13, 2009

college physics
the question is that what happened when the ozone layer becomes destroyed?
September 18, 2009

physics
the answer is 450j because work is always a product of displacement and force. so w=f*d w=30.0*15.0 w=450joles
September 18, 2009

religion
When jesus took the _________ one of the soilders took a lance or a sword and pierced his side.
March 4, 2009

science
suppose your mom is boiling water near the window where did the mist came from and why was there mist on the window
January 21, 2009

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