Friday
December 9, 2016

Posts by zainab

Total # Posts: 50

Science
25cm3 of 0.1mol/dm3 Na2CO3 solution was titrated against 23.45cm3 of H2SO4 acid using phenolphthalein indicator. Calculate the concentration of the acid.
October 30, 2016

chemistry
explain briefly why CuSo4 is more soluble in water than in organic solvent
March 30, 2016

physics
An object of size 3cm is placed 14cm in front of a concave lens of focal length 21cm calculate position and size of the image?
November 22, 2015

chemistry
the heat capacity of copper is 0.382J/g degrees celsius. a 22.6g sample of copper at 93 degrees celsius is placed in 50g of water at 23.9 degrees celsius. what is the final temperature of the system?
November 9, 2015

chemistry
a metal sample having a temperature of 100 degrees Celsius and a mass of 45.2g was placed in 50g of water with a temperature of 26 degrees Celsius. at equilibrium, the final temperature was 32.7 degrees Celsius. a)how much heat flowed into the water? b)what is the heat ...
November 9, 2015

english literature
hi i have written a review below but its word limit is very high. please help me reduce it to around 200 words or a bit more. thanks in advance. 1. Introduction: Overwhelmed by political intrigue, confronted by a world adversarial to moral sensibilities, the play dramatizes ...
July 21, 2015

auface area of solid shapes
The volume of a circular cone of base radius and height is given by v = 1/3. 22/7. r^2 .h make r the subject of the formular
March 4, 2015

english
how to practice creative writing
October 13, 2014

university
Three point charges are placed on the x-axis. A charge of +2.0 ¦ÌC is placed at the origin, −2.0 ¦ÌC to the right at x=50 cm, and +4.0 ¦ÌC at the 100cm mark. What is the magnitude of the electrostatic force that acts on the ...
September 19, 2014

university
Three equal negative point charges are placed at three of the corners of a square of side d. What is the magnitude of the net electric field at the center of the square? (k=1/4ƒÎϵ0=8.99~109N⋅m2/C2 ) Express your answer in terms of the variables d, ...
September 19, 2014

university
A 5.0-ìC point charge is placed at the 0.00 cm mark of a meter stick and a -4.0-ìC point charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field due to these charges equal to zero?
September 19, 2014

math
The length of a rectangle is 7 cm longer than its width. If the perimeter of the rectangle is 74cm, find the length and the area of the rectangle.
August 16, 2014

physic
The sports car in Figure 6 is travelling along 30 banked road having a radius of curvature of ñ=152 m. If the coefficient of static friction between the tires and the road is µs=0.2, determine the maximum safe speed so no slipping occurs. Neglect the size of the ...
March 25, 2014

physic
A box of mass 2 Kg lies on a rough horizontal floor with the coefficient of friction between the floor and the box being 0.5 (Figure 3). A light string is attached to the box in order to pull the box across the floor. If the tension in the string is TN, find the value that T ...
March 25, 2014

physics
Determine the distance to which the 90 kg painter can climb without causing the 4 m ladder to slip at its lower end A as shown in Figure 1. The top of the 15 kg ladder has a smaller roller, and at the ground the coefficient of static friction is 0.25. The mass center of the ...
March 25, 2014

physics
1 - Determine the distance to which the 90 kg painter can climb without causing the 4 m ladder to slip at its lower end A as shown in Figure 1. The top of the 15 kg ladder has a smaller roller, and at the ground the coefficient of static friction is 0.25. The mass center of ...
March 25, 2014

math
ʃ sin² cos² dx
March 4, 2014

math
thank you
February 28, 2014

math
ʃ ( tanx + cotx )² dx
February 28, 2014

Politics
What is the history of the formation of Democratic Socialism? Can you please provide links?
October 6, 2013

physics
post my answer plz
June 29, 2013

physics
a monatomic gas initially at 19 degree celsius is suddenly compressed to 1/10th its original volume .what is temperature after compression?
June 29, 2013

Chemistry
how can be a carbonyl compound separated from a non-carbonyl compound by: A. Filteration B. Crystallization C. Sublimation D. Solvent extraction
June 23, 2013

math
I was just doing this for my math homework right now!! P.S. to Bob, you did the last one wrong! It's actually 2,033, dumbo!
January 9, 2013

maths
if 2 cm on a map is 50 kms what is 8.5 cms on a map...how many kms ???
January 9, 2013

maths
make a true number sentence by filling in the missing number 14 +(3x2)= _________ (14 + 3)x2 = _______
January 9, 2013

arithmetic
2. A person walking along a straight road observed that at two consecutive kilometre stones the angles of elevation of a hill front of him are 40o and 80o respectively. Find the height of the hill.
April 24, 2012

biology
what is the length of trecha in men
December 19, 2011

chemistry
10.0*5.0/0.500=100ml
September 18, 2011

Math
5 sisters to fill 2 spots so 4. 5*4=20 then 20/2= 10
September 13, 2011

algebra
The sum of the squares of two consecutive odd integers decreased by the product of the integers is the same as sixty-seven.
May 4, 2011

algebra
You have been put in charge of making pizza for the fundraiser. You are told to make the larger pizzas with a radius 3 less than twice the radius of the smaller pizzas. The difference in the area of the pizzas is to 24 pi. Find the radius of the smaller pizza.
May 4, 2011

Physics
A fan rotates from rest and accelerates 1 rad per square second for 1 second find the angular velocity if 1 round= 2 pi find the complete no of rounds the fan rotates at constant velocity during second half of its motion
April 12, 2011

chemistry
hen 9.3 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the boiling point the boiling point increased to 81.19 degrees C from 80.1 degrees C. If the Kbp of the solvent is 2.53 K/m, calculate the molar mass of the unknown solute. The answer is 432. I don'...
February 5, 2011

English
Pathetic is to funny as: a.) distressing is to upsetting b.) dexterously is to gracefully c.) adequate is to sufficient d.) passive is to domineering I can't figure this one out. I don't find that any of the choices have the same relationship as pathetic is to funny.
December 17, 2010

math
the perimeter of an equilateral triangle is 9cm.how long is each side?
December 5, 2010

trig
graphs of trignometry
November 20, 2010

mathematics
two springs and two masses are attached in a straight line on a horizontal frictionless surface. the system is set in motion by given external force f(t) acting on the right hand mass m2. we denoted by x(t)the displacement(to the right) of mass m1 from static equilibrium ...
October 17, 2010

German
Can somebody please check over my german homework? I really would appreciate somebody checking over what I've written and telling me where and why I may have gone wrong: "Ich höre gern klassische musik, weil ich eine filme über Mozart gesehen habe und die ...
September 19, 2010

please explain me about acid and alkalis
May 5, 2010

Faculty of Business Studies
LB160 TMA01 • This TMA01 contains 3 parts. Student should answer either Part 1 or Part 2. Part 3 is compulsory. • The value of TMA01 is 15 points. • The mark assigned to each part is 7.5 points. ...
April 16, 2010

Why did many people in mecca reject muhammad's ideas at first?
January 24, 2010

mental
i cant see the question
June 26, 2008

music
explain in full the meaning of binary form
February 25, 2008

Chem
How do I find the wavelenght of a given frequency
October 24, 2007

science
Plese tell the answer
September 15, 2007

khan
examples of sentence structures http://www.arts.uottawa.ca/writcent/hypergrammar/sntstrct.html http://wwwnew.towson.edu/ows/sentencestruct.htm
January 28, 2007

Chemistry
1 hr/60 min and 60 min/1 hr
January 25, 2007

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