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Most popular questions and responses by gift
  1. physics

    A 10uf capacitor is charged from a 30v supply and then connected across an uncharged 50uf capacitor.Calculate a. The final potential difference across the combination b. The final and initial energies

    asked on October 18, 2016
  2. PHYSICS

    THE MASS OF VENUS IS 81.5% OF THE EARTH AND ITS RADIUS IS 94.9% THAT OF THE EARTH. A)COMPUTE THE ACCELERATION DUE TO GRAVITY ON THE SURFACE OF VENUS FROM THESE DATA.B)IF A ROCK WEIGHS 75.0N ON EARTH,WHAT WOULD IT WEIGH ON THE SURFACE OF VENUS?

    asked on August 4, 2014
  3. maths

    D is partly constant and partly varies with V. when V=40, D=150 and when V=54, D=192. (i)find the formula connecting D and V (ii) find D when V =73.

    asked on April 21, 2019
  4. Civics

    Major local civic problems

    asked on January 16, 2019
  5. science

    an you please solve the questions for me 1. 3 moles of pesticide of molecular mass 200 g/mole is applied to a closed system consisting of 20 m3 of water, 10 m3 of air, 1 m3 of sediment, and 0.001 m3 of fish. Determine the concentration and amount in both

    asked on March 27, 2014
  6. Beryl

    Pb3(ASO4)2.the solubility product expression

    asked on November 24, 2014
  7. maths

    A girl starts at A and walks 2km south to B.she then walks 3km west to C.find the distance and bearing of C from A.

    asked on April 27, 2019
  8. chemistry

    Use the bond enthalpies and bond energies in the data book in themochemical equations to calculate the reaction enthalpy of: H2(g) +Br2(g) -> 2HBr(g)

    asked on July 11, 2011
  9. chemistry

    separation techniquesfor silver chloride and sodium trioxonitrate(v).and properties of the three state of matter.

    asked on October 4, 2014
  10. chemistry

    By using the bond enthalpies and bond energies in thermochemical equations to calculate the reaction enthalpy of; H + Br=2HBr

    asked on July 10, 2011
  11. Chemistry

    What are the two electronic structural conditions for the stability of an atom?

    asked on December 15, 2018
  12. Chemistry

    How many moles of silver will be deposited from a silver (i) trioxonitrate (v) solution by 16.0g of copper (Ag=108,Cu=63.5)

    asked on May 31, 2016
  13. chemistry

    properties of the three state of matter.and seperation techique for silver chloride and sodium trioxonitrate(v)

    asked on October 4, 2014
  14. Math

    The quantity is partly constant and partly varies inversely as the square of x. When w=1,x=11 and when w=2,x=5. Find the formula connecting w and x find w when x=4.

    asked on February 10, 2019
  15. maths

    The formula P=9d + 320 is the cost of buying an article "p" while "d" is the number of articles bought. if P=N797.00 find the number of articles.

    asked on April 21, 2019
  16. maths

    I added 18 to 3 times a number, the result is equal to 5 times the number. what is the number ?

    asked on April 21, 2019
  17. Math

    The quantity is partly constant and partly varies inversely as the square of x. When w=1,x=11 and when w=2,x=5 find the formula connecting w and x find w when x=4

    asked on February 10, 2019
  18. university of calabar

    A stoppered flask at 25 0C contains 250 ml water, 200 ml octanol, and 50 ml of air. An unknown amount of o-xylene is added to the flask and allowed to partition among the phases. After equilibrium has been established, 5.0 mg of o-xylene are measured in

    asked on March 27, 2014
  19. physics

    You are on a new planet and want to know the acceleration due to gravity. You take a ball and kick it at an angle of 18.0° at a speed of 22.1 m/s. If the ball is in the air for 7.40 s, what is the magnitude of the acceleration due to gravity?

    asked on September 25, 2018
  20. physics

    When water falls from the top of the waterfall,at the victoria falls in zimbabwe,the temperature of the water at the top is less than the temperature at the bottom.If 180.5g of water falls a distance of 125.0m, calculate the increase in temperature of the

    asked on July 16, 2011
  21. science

    a plane is headed north with a velocity of 400km/hr and west wind blowing at 70km/hr.find the distance of the plane from its base in 2hrs

    asked on October 23, 2013
  22. maths

    formular for finding the area of a football pitch

    asked on October 29, 2018
  23. Pre-calculus

    A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of laboratory rats a daily diet of precisely 34.53 units of niacin and 25,430 units of retinol. She uses two types of commercial

    asked on December 10, 2015
  24. physics

    a plane is headed north with a velocity of 400km/hr and west wind blowing at 70km/hr.find the distance of the plane from its base in 2hrs

    asked on October 23, 2013
  25. Science

    A car is moving at a constant velocity when it is involved in a collision.the car comes to rest after 0.45sec with an average acceleration of 65,0 m/s2 in the direction opposite that of the car's velocity. What was the speed ,in km/h, of the car before the

    asked on March 8, 2013
  26. Chemistry

    Calculate the enthalpy of combustion of acetylene(per mol acetylene) using bond enthalpies and energy diagram

    asked on August 5, 2011
  27. physics

    a plane is headed north with a velocity of 400km/hr and west wind blowing at 70km/hr.find the distance of the plane from its base in 2hrs

    asked on October 23, 2013
  28. Chemistry

    1)Define the term'geometric isomers' 2)Give geometric isomers and corresponding names for the following condensed structural formula: CH3CH2(CH)2CH3

    asked on September 23, 2011
  29. Chemistry practice

    Glycine is the amino acid used to make proteins a)for each mole of glycine that burns,973.49k/mol of which is libarated eqution and the values of delta Hf^o for the products of combustion to calculate the enthalpy of formation for glycine.Represent your

    asked on August 5, 2011
  30. Chemistry

    Calculate the enthalpy of combustion of acetylene(per mol acetylene)using bond enthalpies and energy diagram

    asked on August 5, 2011
  31. science

    3 moles of pesticide of molecular mass 200 g/mole is applied to a closed system consisting of 20 m3 of water, 10 m3 of air, 1 m3 of sediment, and 0.001 m3 of fish. Determine the concentration and amount in both grams and mole units in air, water, sediment

    asked on March 27, 2014
  32. PHYSICS

    AT WHAT DISTANCE ABOVE THE SURFACE OF THE EARTH IS THE ACCELERATION DUE TO EARTH'S GRAVITY 0.980M/S² IF THE ACCELERATION DUE TO GRAVITY AT THE SURFACE HAS MAGNITUDE 9.80M/S²

    asked on August 4, 2014
  33. Chemistry

    Xenon is one of the noble gases, and is generally quite unreactive.in fact,it was long believed that all the noble gases were totally unable to form compounds.It came as quite a surprise,therefore,when it was discovered that some of its compounds could be

    asked on July 12, 2011
  34. Chemistry

    Use the bond enthalpies and bond energies from the data book in themochemical equations to calculate the reaction enthalpy of:H2(g) + Br2(g) ->2HBr(g) and show your workings in the question above in an energy level diagram.please..

    asked on July 12, 2011
  35. Maths,variation

    the distance covered by a falling ball varies as the square of the time taken. If a ball falls through 1800m in 15seconds,calculate the distance when the time taken is 15seconds and the time taken for is distance of 648m.solve using variation

    asked on February 11, 2018
  36. Physics/chemistry

    Which of the practices will lead to losses in electrical power transmission? A. Using transmission cables of large diameter B. Transmitting at high voltage and low current C. Transmitting at relatively low voltage and high current D. Using a step-up

    asked on September 16, 2017
  37. English

    What a....! The more you look, the less you see. A. Wonder B. Miracle C. Challenges D. Paradox

    asked on September 16, 2017
  38. Mabel hill, physics

    Two force,3N and 4N act on a body in the direction due north and east respectively. Calculate their equilibrium?

    asked on October 12, 2015
  39. Life orientation

    Idemtify 3 enviromental health hazards that causes ill health,accidents,crises and disaster within a community in South Africa and globally.include evidence that is current of the identified issues

    asked on April 15, 2013
  40. statistics

    The time required by workers to complete an assembly job has a mean of 50 minutes and a standard deviation of 8 minutes. To spot check the workers' progress on a particular day, their supervisor intends to record the times 60 workers take to complete one

    asked on March 8, 2012
  41. Chemistry

    Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka=1.75*10^-5

    asked on September 23, 2011
  42. physics

    a)Hydrogen has a much higher specific heat capacity than milk. What can you say about the specific heat capacity of hydrogen?b)wrap a cotton wool around a thermometer,will its temperature rise?Explain your answer c)if you are holding a metal nail with one

    asked on July 16, 2011
  43. Maths

    A bank charges 2 1/2% commission for issuing a bank draft. If a customer obtained a bank draft for #84,000 from the bank, calculate the total cost of the bank draft

    asked on September 15, 2017
  44. PHYSICS

    Pressure at the bottom doesnot depdnd on..

    asked on June 3, 2016
  45. Mechanics

    A constant force of 40newton is applied tangentally to the rim of the wheel with 20cetimetre radius the wheel hs moment of intial 30kg find (a)angular acceleration (b)angular speed after 4second frm rest (c)d number of revolution made in(d)show that d work

    asked on December 27, 2015
  46. life orientation

    provide recommendation on how to address poverty?

    asked on August 3, 2013
  47. Chemistry

    Skeletal structural formulas of pentane,2 methyl butane and 2,2 dimethyl propane

    asked on September 24, 2011
  48. Chemistry

    Write down (a) condensed and (b) skeletal structural formulas for isomers of an organic substance whose chemical formula has 5 carbon atoms and 12 hydrogen atoms and (c) provide the common name for each of the isomers

    asked on September 23, 2011
  49. Chemistry practice

    Calculate using the enthaly of formation,the enthalpy of combustion of methanol,CH3OH

    asked on July 31, 2011
  50. Chemistry practice

    Using the form of energy diagram,make a concept map of the two different methods of calculation of reaction enthalpy(via the bond enthalpy and via the enthalpy of formation)

    asked on July 31, 2011
  51. physics

    A piece of metal has a density of 0.20g/cm^3.what is the volume in cm^3 of a 1g sample of a substance?

    asked on July 17, 2011
  52. Chemistry

    Standard enthapies of formation are not always like bond enthalpies.Explain

    asked on July 12, 2011
  53. Physics/chemistry

    Which of the following substances does not conduct electricity? A. Graphite B. Glass C. Sulphuric acid D. Table salt solution

    asked on September 16, 2017
  54. Computer

    The name given to program that is stored in the system or in a diskette is known as... A. Index B. Icon C. File name D. None of the above

    asked on September 16, 2017
  55. math

    Two chords in a circle are equal in lengh.The distances from the centre of the circle can be represented by x2 and 4x respectively.How far is it chord from the centre of the circle?[Under the topic of properties of a circle.]

    asked on January 19, 2016
  56. Kengolry international acedemy

    N=a+bT^2

    asked on October 28, 2015
  57. life orientation

    identify one enviromental or human factor that causes ill health, accident crises, and disaster within your community

    asked on May 8, 2013
  58. Prcts chemistry

    Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka = 1.75*10^-5

    asked on September 22, 2011
  59. physics

    What is the boiling and freezing points of celsius scale and kelvin

    asked on July 17, 2011
  60. chemistry

    State whether each of the following will increase,decrease or unchange when catalyst is added to the reaction and give an explanation for your answer please a) rate of reaction b)activation energy c)reaction enthalpy d)equilibrium of reaction

    asked on July 9, 2011
  61. Biology

    The reproductive system of a male mammal is made up of... A. Claspers, prostrate gland, sperm duct and vas deference. B. Festis, prostrate gland, sperm duct and vas deferens. C. Oviduct, urethra, testis, and sperm duct. D. Testis, uterus, prostrate gland

    asked on September 16, 2017
  62. physics,

    A 40degree Celsius thermometer reads 0.7degree Celsius at it boiling point of water. Evaluate the correct thermometerwhen it reads at 30degree Celsius

    asked on January 18, 2017
  63. Maths

    M varies directly as n andinversely as the square of p. Given that m=3 when n=2 and p=1, write down an equation connecting gmnp

    asked on May 15, 2016
  64. science

    For the monatonic gas in #3,estimate the momentum of the gas for a particle mass of 3x10^-4g

    asked on October 17, 2015
  65. Physics

    Malaan is travelling from Makhado to Polokwane by taxi at a speed of 120km/h.A Nissan bakkie passes the taxi while it is on its way to Polokwane and is moving at 150km/h. a) Determine Malaan's velocity with respect to the Nissan bakkie b) what is the taxi

    asked on October 12, 2011
  66. Chemistry

    Define the terms 'weak acid' and 'catenation'

    asked on September 23, 2011
  67. physics

    Wrap a cotton wool around a thermometre,will its temperature rise? Explain your answer please

    asked on July 17, 2011
  1. Maths

    solve it

    posted on May 28, 2019
  2. maths

    please answer my question

    posted on April 27, 2019
  3. Life orientation

    How can sports detract nation building

    posted on March 10, 2019
  4. chemistry

    agreed

    posted on November 11, 2018
  5. Math

    some help please

    posted on July 24, 2018
  6. math

    1 WHOLE NUMBER 1 OVER 3

    posted on January 18, 2018
  7. Computer

    OK. Thanks

    posted on September 16, 2017
  8. Physics/chemistry

    So according to your explanation, transmitting at high voltage and low current will lead to losses in electrical power transmission right? Which is option B. Though am not a science student rather Art but the question appeared on my hnd aptitude test, so I

    posted on September 16, 2017
  9. Biology

    That's how the spellings are on d question paper they gave us. D only mistake I made was the one I wrote 'vas deference instead of vas deferens' other ones are the same on my question paper. Thanks

    posted on September 16, 2017
  10. Physics/chemistry

    C?

    posted on September 16, 2017
  11. English

    C. Challenges but I want to be more sure

    posted on September 16, 2017
  12. Computer

    File name.. But not that sure

    posted on September 16, 2017
  13. Maths

    86,100

    posted on September 16, 2017
  14. Maths

    86,100

    posted on September 15, 2017
  15. Social Studies

    YES

    posted on October 13, 2016
  16. math

    Please answer the above question

    posted on May 15, 2016
  17. English

    Because i want too know best

    posted on April 24, 2016
  18. Life orientation

    South africa

    posted on April 13, 2016
  19. Trigonometry

    The bearing of town P and Q is 315°, while town R is south of town P and west of town Q. if town R is 60km away from town Q, how far is town R to from town P

    posted on March 22, 2016
  20. PHYSICS

    200gX12.5cm=12.5cmXp. p=200g

    posted on September 10, 2015
  21. life orientation

    bad road that direct impact on the physical, emotional, social and economic

    posted on August 23, 2015
  22. Physics

    DISPLACEMENT

    posted on July 7, 2015
  23. Life orientation

    provide recommendation

    posted on May 8, 2013
  24. Mpumulana

    Why do some criminals use facebook as a tool to achieve their goal

    posted on February 6, 2013
  25. environment

    5 ways in which the human or enviromental problem impacts on the community

    posted on April 15, 2012
  26. Physics

    Can someone help plz

    posted on October 12, 2011
  27. Chemistry

    Thanx a lot GOD BLESS YOU

    posted on September 23, 2011
  28. environment

    In 10-15 line critically discuss 5 ways in which the environment problem impect on the community

    posted on July 18, 2011
  29. physics

    Heat is moving inward

    posted on July 17, 2011
  30. Chemistry

    Hydrogen has a much higher specific heat capacity than milk.what can you say about the specific heat capacity of hydrogen?

    posted on July 16, 2011
  31. physics

    I really need the answer for this question please.

    posted on March 24, 2010