# Clive

Most popular questions and responses by Clive
1. ## trigonometry

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

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

3. ## chemistry

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

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.

5. ## chemistry

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

6. ## MATHS

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

7. ## programming ( qbasic)

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

8. ## CHEMISTRY

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?

9. ## chemistry

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

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 :/

11. ## MATHS SIMPLE PROBLEM HELP

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?

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

13. ## Physics

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

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

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?

16. ## chemistry

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

17. ## PHYSICS

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

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

19. ## chemistry

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

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)

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 ?

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?

23. ## CHEMISTRY URGENT HELP

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?

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 " ..

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

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

27. ## chemistry

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

28. ## chemistry

how to separate the mixtures of methane gas and carbon dioxide

29. ## trigonometry

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

1. ## Math 4th gr

Math 28000+2000+600+50 in standard form

posted on November 5, 2017
2. ## CHEMISTRY

H2C2O4. x H20

posted on July 9, 2016
3. ## physics

58

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