Most popular questions and responses by zainab
  1. Physics

    A spring is stretched by a 40mm by a force of 10 newton.what is the work done by the force

    asked on July 2, 2019
  2. 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

    asked on March 25, 2014
  3. Further maths

    The 8th term of a linear sequence is 18th and the 12th term is 26th .find the first term,common difference and the 20th term

    asked on February 6, 2017
  4. 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?

    asked on September 19, 2014
  5. 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?

    asked on November 22, 2015
  6. math

    A bicycle wheel has a diameter of 65cm paring a journey, the wheel makes 1000 complete revolutions .how many metres does the bicycle travel ,Use the value 3.14 for r.

    asked on November 13, 2018
  7. 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?

    asked on November 9, 2015
  8. 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 charge at the origin?

    asked on September 19, 2014
  9. 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.

    asked on April 24, 2012
  10. music

    explain in full the meaning of binary form

    asked on February 25, 2008
  11. 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.

    asked on March 25, 2014
  12. maths

    if the diameter of a bullock cart is 1.4 how much rotation it will take to cover the distance off 1.1km

    asked on December 1, 2017
  13. chemistry

    explain briefly why CuSo4 is more soluble in water than in organic solvent

    asked on March 30, 2016
  14. 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,

    asked on September 19, 2014
  15. 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,

    asked on March 25, 2014
  16. physics

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

    asked on June 29, 2013
  17. 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

    asked on October 17, 2010
  18. 9th grade

    Why did many people in mecca reject muhammad's ideas at first?

    asked on January 24, 2010
  19. 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?

    asked on November 9, 2015
  20. 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

    asked on March 4, 2015
  21. 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

    asked on March 25, 2014
  22. math

    ʃ ( tanx + cotx )² dx

    asked on February 28, 2014
  23. algebra

    The sum of the squares of two consecutive odd integers decreased by the product of the integers is the same as sixty-seven.

    asked on May 4, 2011
  24. math

    the perimeter of an equilateral triangle is long is each side?

    asked on December 5, 2010
  25. 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.

    asked on October 30, 2016
  26. 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

    asked on May 4, 2011
  27. Further maths

    The first term of a linear sequence is 3 and the 8 term is 31. Find the common difference

    asked on February 6, 2017
  28. 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.

    asked on August 16, 2014
  29. math

    ʃ sin² cos² dx

    asked on March 4, 2014
  30. Politics

    What is the history of the formation of Democratic Socialism? Can you please provide links?

    asked on October 6, 2013
  31. maths

    if 2 cm on a map is 50 kms what is 8.5 cms on a many kms ???

    asked on January 9, 2013
  32. maths

    make a true number sentence by filling in the missing number 14 +(3x2)= _________ (14 + 3)x2 = _______

    asked on January 9, 2013
  33. biology

    what is the length of trecha in men

    asked on December 19, 2011
  34. 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,

    asked on July 21, 2015
  35. Chemistry

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

    asked on June 23, 2013
  36. 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

    asked on April 12, 2011
  37. 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

    asked on February 5, 2011
  38. 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

    asked on December 17, 2010
  39. trig

    graphs of trignometry

    asked on November 20, 2010
  40. 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

    asked on September 19, 2010
  41. 6th grade

    please explain me about acid and alkalis

    asked on May 5, 2010
  42. 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.

    asked on April 16, 2010
  43. khan

    examples of sentence structures

    asked on January 28, 2007
  1. Physics

    Please help me with the solution because that's exactly why I'm on line

    posted on July 27, 2018
  2. science

    If blood leaving the heart mixed with blood entering the heart it will become deoxygenated and the person'heart will be damaged

    posted on July 17, 2018
  3. Chemistry


    posted on May 21, 2018
  4. Managerial Economics

    Demand function for a cola-type soft drink in general is q= 20 – 2P, where Q stand for quantity and P stands for price. a. Calculate point elasticities at prices of 5 and 9. Is the demand curve elastic or inelastic at these points?

    posted on March 14, 2018
  5. Math

    but how did you get the 28-9.8t?

    posted on September 20, 2017
  6. statistics


    posted on October 27, 2016
  7. chemistry


    posted on October 8, 2016
  8. Chemistry

    1 hr/60 min and 60 min/1 hr

    posted on September 20, 2016
  9. science

    Plese tell the answer

    posted on June 24, 2016
  10. Social Studies


    posted on November 14, 2015
  11. Math

    5 sisters to fill 2 spots so 4. 5*4=20 then 20/2= 10

    posted on February 19, 2015
  12. Ed. tech HELP!!!

    how to practice creative writing

    posted on October 15, 2014
  13. math

    thank you

    posted on March 4, 2014
  14. physics

    post my answer plz

    posted on June 30, 2013
  15. 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!

    posted on April 28, 2013
  16. mental

    i cant see the question

    posted on April 25, 2011
  17. Chem

    How do I find the wavelenght of a given frequency

    posted on October 24, 2007