Most popular questions and responses by Clive
  1. trigonometry

    Prove : 1 + Sin2A/ Cos2A = CosA + SinA / CosA- SinA

    asked on May 5, 2015
  2. chemistry

    Methane burns in air to give carbon dioxide and water. Give a chemical equation . Show(State ) how the mixtures of these gases can be separated

    asked on May 5, 2015
  3. chemistry

    In the manufacture of iron, carbon monoxide reduces iron oxide. Why isn't hydrogen used?

    asked on October 8, 2015
  4. MATHS

    Two circles of radii 5 cm and 12 cm are drawn, partly overlapping. Their centers are 13cm apart. Find the area common to the two circles.

    asked on July 17, 2016
  5. chemistry

    How can DRY calcium carbonate be prepared from sodium carbonate? Na2Co3 + CaCl2 --- NaCL + CaCo3. but how to get dry calcium carbonate

    asked on August 17, 2015
  6. MATHS

    While selling 15 copies, a man gains the cost price of 5 copies. Find his profit percent.?

    asked on March 18, 2016
  7. programming ( qbasic)

    Write a program in qbasic to print the user entered word in reverse order using FUNCTION...END FUNCTION

    asked on June 2, 2015

    What mass of sulphur must be burned to produce 64.0 tonnes of sulphur dioxide. . . So far, I have calculated the molecular mass of SO2( 64.1 ) . and then found out the number of moles of sulphur dioxide. ( 998.4) What to do now?

    asked on July 5, 2016
  9. chemistry

    How to distinguish between an acid and an alkali. DO not use indicators

    asked on June 24, 2015
  10. math

    A and B can do a piece of work in 12 days. They started to work together but A left after a few days. If B alone worked for 20 days, the whole work was finished in 24 days. How long would A take to complete the work??? question is really confusing :/

    asked on October 21, 2015

    Given that 3rd Quartile (Q3) = 60 . The classes are : 0-10,10-20,20-30,30-40,40-50,50-60,60-7... 70-80,80-90 Now, IN which class does Q3 lie?? 50-60 or 60-70?

    asked on January 24, 2016
  12. chemistry

    Copper dissolves in dilute acid ( H2so4) to form a pale blue solution Which of the following equation is correct 1) Cu + H2sO4-----> CuSO4 + h2 2) Cu + 2H2so4--->Cuso4 + 2H20 + 2SO2

    asked on May 5, 2015
  13. Physics

    A brick has mass 10kg and dimensions (10*5*20)cm Find the maximum and minimum pressure it can exert on ground

    asked on April 17, 2016
  14. MATH

    A(2,1) , B(4,3) and C(3,5) are the vertices of a triangle ABC. If r1 represents the reflection in X axis and r2 represents the reflection in the line x=5, find the image of triangle ABC under combined transformation r2 o r1. Should we perform r2 first or

    asked on January 26, 2016
  15. MATHS

    A and B can do a piece of work in 10 days, B and C in 15 days, A and C in 12 days. A,B and C work together to finish the work. If they are paid $1500, how should the money be divided?

    asked on December 31, 2015
  16. chemistry

    What would be the pH of a solution that liberates carbon dioxide from sodium carbonate. Give chemical equation and reason

    asked on July 14, 2015

    a=40.0 plus-minus 0.1 cm (uncertainty) b=2.5 plus-minus 0.05 cm (uncertainty) Find a/b and its uncertainty Is it 16cm plus-minus 1cm of uncertainty or is it 16.0cm plus-minus 0.4 cm of uncertainty

    asked on July 7, 2016
  18. physics

    How can we increase the rate of change of magnetic flux? ( i want to check my answer)? Can it be : a) using a stronger magnet b) increasing the rate of movement of the conductor? are these correct?? both of them

    asked on April 5, 2016
  19. chemistry

    In the preparation of ammonia, why should the mixture of ammonium chloride and calcium hydroxide be a paste, not dry powder?

    asked on November 29, 2015
  20. maths

    Express the function f(x)= (2x + 1)^3 as a combination of functions g(x) and h(x) and define g(x) and h(x)

    asked on July 27, 2016
  21. maths

    x^2 + xy - Ky^2=0 , the angle made by the line pairs of this equation is 45 degree. I got the value of k as 0 and -2, do we need to reject k=0 and conclude our answer as k=-2 ?

    asked on April 7, 2016
  22. MATHS

    A and B take 18 days to complete a work. A left the work after 10 days and B takes 12 days more to complete the work. In how many days can A complete the whole work?

    asked on December 31, 2015

    carbon dioxide is moderately soluble in cold water but is completely boiled out if the water is boiled.Solubility increases rapidly with pressure. How is the above phenomenon used in the production of aerated drinks?

    asked on August 20, 2015
  24. programming ( qbasic)

    I am stuck in this question. I don't know how to proceed The question ? If A=1 , B=2 ,C=3 , D=4, E=5 ........................................... then print the sum of the user entered word .. ( if the user enters ABC, then the output must come :" 6 " ..

    asked on June 22, 2015
  25. chemistry

    Red sclae residue ( COPPER II ) partly dissolves in dilute acid to form a pale blue solution. Name the pale blue solution and give chemical equation to support your answer

    asked on May 4, 2015
  26. math

    Find the HCF and LCM of: 1 + 4x + 4x^2 - 16x^4.. ,1 + 2x - 8x^3 - 16x^4.., 16x^4 + 4x^2 + 1

    asked on April 30, 2015
  27. chemistry

    Lime water can be used to detect carbon dioxide but it cannot be used to absorb carbon dioxide. Why?

    asked on September 7, 2015
  28. chemistry

    how to separate the mixtures of methane gas and carbon dioxide

    asked on May 23, 2015
  29. trigonometry

    Show that: sin^2(45 + A) + sin^2(45 - A ) = 1

    asked on May 4, 2015
  1. Math 4th gr

    Math 28000+2000+600+50 in standard form

    posted on November 5, 2017

    H2C2O4. x H20

    posted on July 9, 2016
  3. physics


    posted on May 22, 2016
  4. life orientation

    People may get angry when they do not have they right

    posted on April 28, 2016
  5. Physics

    Thank you sir.

    posted on April 17, 2016
  6. maths

    But I did it comparing with ax^2 + 2hxy + by^2=0 and got -2

    posted on April 7, 2016
  7. physics

    so, it is wrong right? Is number b correct?

    posted on April 5, 2016
  8. MATHS

    Thanks... can you help me with this question as well? A and B take 18 days to complete a work. A left the work after 10 days and B takes 12 days more to complete the work. In how many days can A complete the whole work?

    posted on December 31, 2015
  9. MATHS

    Thank you so much. :D :D . I am very grateful towards you... :)

    posted on December 31, 2015
  10. chemistry

    in limited air, what reaction does it undergo to form carbon MONOXIDE ?

    posted on August 18, 2015
  11. chemistry

    thanks sir..

    posted on July 15, 2015
  12. programming ( qbasic)

    thank you. can u tell me how you actually found it ?

    posted on June 22, 2015
  13. chemistry

    Thak you sir for all these momentous information. Can you help me with one more question. I have posted it just now sir. I have an important exam tomorrow The question being ; Methane burns in air to give carbon dioxide and water. Give a chemical equation

    posted on May 5, 2015
  14. chemistry

    powders are carbon and cupric oxide red sclae - copper pale blue solution - CuSO4 rest do by yourself

    posted on May 5, 2015
  15. chemistry

    no 2 obviously

    posted on May 5, 2015
  16. chemistry

    Is Cu + 2H2So4 = Cuso4 + 2so2 + 2h20

    posted on May 5, 2015
  17. chemistry

    Thank you sir.. You made my day :D

    posted on May 4, 2015