# Kelvin

Most popular questions and responses by Kelvin
1. ## Further maths

In an examination 31 candidate passed Chemistry,29 passed Physics 3 failed both subjects.lf 50 candidates sat for the examination how many of them passed Chemistry only.

2. ## math

The books for Mathematics, Geography and Science in a school are in the ratio 5:7:8. There is a proposal to increase these books by 40%, 50% and 75% respectively. What will be the ratio of the increased books? #Please anyone who can help me out with the

3. ## chemistry

If methane at a pressure of 3.2 atm and at 21 °C is introduced into a container, the gas be heated to ______°C to increase the pressure to 12 atm.

4. ## life orientation

name and explain the laws that protect the citizens against xenophobia

5. ## math

i need your help guys #A fruit vendor bought 600 apples for \$ 4800. He spent \$ 400 on transportation. How much should he sell each to get a profit of \$ 1000?

6. ## Physics

A 58 kg woman is ice-skating toward the east on a frictionless frozen lake when she collides with a 94 kg man who is ice-skating toward the west. The maximum force exerted on the woman by the man during the collision is 210 N, west. Take east to be the

7. ## chemistry

After 273 m3 of ethylene oxide is formed at 748 kPa and 525 K, the gas is cooled at constant volume to 293 K.The new pressure is _____kPa

8. ## MATH

Maya and Sally were the two finalists in a singing competition. The person with the most votes from the audience was chosen as the winner. Sally received 25% of the total votes and lost by 62,500 votes. No person in the audience was allowed to vote more

9. ## math

Which type of graph is best suited for displaying the number of hours spent studying by students in different age ranges?

10. ## pre-calc

Find the area of a triangle with sides of length 5 and 8 and included angle 74°. (Round your answer to one decimal place.)

11. ## Calculus

An ice cube is melting such that the side of the cube is decreasing at the rate of 1/4 t^2 cm / min. It is given that the side of the cube is 8cm at the start of the experiment. Calculate the length of the side of the cube when t = 4? ( answer 2 2/3 cm)

12. ## biology

function of liver

13. ## physics

if the shortest lenggth of the tube for resonance is 0.1m and next resonance length is 0.35m what is the frequency of the vibration

14. ## Trigonometry

What representations do not change the location of the given point (7,140°)?

15. ## math

Mrs. Cason gives her class a spelling quiz every Monday, a math quiz every other Monday and a history quiz every third Monday . Sally smarty is in Mrs. Carson's class. She received a grade of 100% on all three quizzes today. How long will it be before she

16. ## math

Maya and Sally were the two finalists in a singing competition. The person with the most votes from the audience was chosen as the winner. Sally received 25% of the total votes and lost by 62,500 votes. No person in the audience was allowed to vote more

17. ## Maths

(1) A cone has height of 8cm and circular radius 6cm calculate (a) It's Volume (b) It's Slant Height (c) The Curved Surface Area (d) The Total Surface Area

18. ## Chemistry 1010

How many grams of Ag2CO3 will precipitate when excess K2CO3 solution is added to 70.0 mL of 0.692 M AgNO3 solution? 2AgNO3(aq) + K2CO3(aq) --> Ag2CO3(s) + 2KNO3(aq)

19. ## chemistry

According to molecular view, kinetic energy, what happens when 2 tablespoons each of water, methylated spirit and petrol are put in an open container separately in relation to time and the rate of vaporisation?

20. ## college

For the reaction NO(g) + O3(g) „_ NO2(g) + O2(g) The frequency factor A is 8.7 X 1012 s-1 and the activation energy is 63kJ/mol. What is the rate constant for the reaction at 75 ¢XC?

21. ## Trigonometry

What representations do not change the location of the given point (7,140°)?

22. ## math

A store offers a 15% discount on all items in the store during a sale. All store employees get an additional 10% employee discount. In the equation below, C represents the cost of an item for an employee including tax, and x represents the original price

23. ## math

The age of Mwenda is 3/5 of that of his sister.If 20 years ago the age of Mwenda was 2/5 of that of his sister then. Find the present age of Mwend. #Please guys help me this question#

24. ## chemistry

According to molecular view, kinetic energy, what happens when 2 tablespoons each of water, methylated spirit and petrol are put in an open container separately in relation to time and the rate of vaporisation?

25. ## chemistry

According to molecular view, kinetic energy, what happens when 2 tablespoons each of water, methylated spirit and petrol are put in an open container separately in relation to time and the rate of vaporisation?

26. ## math

Mrs. Cason gives her class a spelling quiz every Monday,and a history quiz every third Monday . Sally smarty is in Mrs. Carson's class. She received a grade of 100% on all three quizzes today. How long will it be before she again has to take all three

27. ## Science

Explain the factors that affect the intensities of absorption in IR spectroscopy. #Please anyone to help me with explanation i have to attend test by tomorrow help me out.

28. ## math

Please anyone to help me solve this question A piece of copper wire is 52 2/3 m long. If each piece has been cut of 3/4 from it. What length will remain after cutting pieces? math question

29. ## chemistry

If methane at a pressure of 3.2 atm and at 21 °C is introduced into a container, the gas be heated to ______°C to increase the pressure to 12 atm. is it 352???

30. ## math

#Plz i need your help guys (the answer for this question)# If you deposit sh. 100,000 in a bank which gives 12% interest rate per year. How much will you earn after 1 year and 6 months? Steve yesterday at 5:42am That would be 100000 * .12 * 1.5 kelvin

31. ## math

find the next number in the following sequence; 1/2,2/3,3/5,5/8, _ *please i need your assistance guys for this question* My idea is as follows denominator part for the given fraction =1+2 =3 then 2+3 =5, 3+5=8,therefore the next denominator part = 5+8 =13

32. ## math

A cow is tied with a rope of length 14 m at the corner of rectangular field measured 20 m by 16 m. Find the area of the field in which the cow can graze. #anyone to help me with proper and systematic step by step solution

33. ## Math

This year my teacher read us the book The Phantom Tollbooth, and since then I've been having strange dreams about drving in usuaual places and paying tolls unusual characters.Last night I dreamed about highway in the clouds near the mythical Mt. Olympus.

34. ## math

Please i need a help also to this question Mwajuma needs 70% to receive a grade C in a certain subject.If the exam has 120 questions and each question carry one mark(1%), how many questions should she answer correctly?

35. ## Chemistry

The molar enthalpy of combustion of demand is -6.78KJ/mol.What mass of decane would have to be burned in order to raise the temperature of 500ml of water from 20 degrees Celsius to 55 degrees celsius. I tried using ndeltaH=mcdeltat. But it didn't work.

36. ## physics

if the shortest lenght of the tube for resonance is 0.1m and next resonanc length is 0.35m what is the frequency of the vibration.

37. ## Algebra(urgent)

a boat moves through still wather at x kilometers(km) per hour. it travels 24km up stream against a current of 2km per hour and then returns with the current. The rate upstream is x-2 because the boat moves against the current and the rate downstream is

38. ## math

5gal 1qt - 2qt 1pt= _gal _qt _pt

39. ## Algebra

a boat moves through still wather at x kilometers(km) per hour. it travels 24km up stream against a current of 2km per hour and then returns with the current. The rate upstream is x-2 because the boat moves against the current and the rate downstream is

40. ## science

In the process called fluorescence, some substances absorb photons of one kind of radiation (e.g) ultraviolet radiation), and give out photons of a different kind (e.g visible light). When infrared radiation falls on these materials, visible light is not

41. ## math

*Please i need the help people about this question* In a school there is 15% more boys than the girls. If the number of girls is 30, find the number of boys in the school.

42. ## math

Please anyone to help the solution and the answer# A piece of copper wire is 52 2/3 m long. If each piece has been cut of 3/4 m from it. What length will remain after cutting pieces?

43. ## math

Please anyone to help me solve this question A piece of copper wire is 52 2/3 m long. If each piece has been cut of 3/4 m from it. What length will remain after cutting pieces?

44. ## maths

A plane leaves an airport x,20-60E and 36-80N and flies due south along the same longitude for 8hours at the rate of 1000km/h to another airport Y,20-60E and titaS.the plane then flies west to another airport Z for 8hours at the same speed. Calculate to

45. ## Chemistry

Aspirin can be prepared in the chemistry laboratory by the reaction of salicylic acid with acetic anhydride. What volume of acetic anhydride is required to produce one killogram of aspirin assuming 100%yield

The farmers boy is going to market again. This time he's taking his faithful dog, two geese,and three bags of corn. He again has to cross the river,but this time he can only carry two items across at a time. He knows if he leaves tham alone, the dog will

47. ## high school

U.S GORVEMENT ENFORCEMENT OF EVIRONMENTAL REGULATIONS HELPS REDUCE HEALTH PROBLEM RELATED TO ENVIRONMENTAL POLLUTION. HOW DOES THIS HELP PROMOTE ECONOMIC GROWTH AND STABILTY?

Hi there, What is the criticisms of advertising? Any sites that talk about the criticisms of advertising?

49. ## math

Daladala fare from tegeta to bunju is sh 450/= for each passenger.How much will be collected for a trip if there is 18 seats which are occupied in full by passengers. Please people help me this question is it 450×2×18 (because trip meaning go and return)

50. ## math

please guys help me this question, how to solve it. Calculate the total surface area of a hollow cylinder whose radius is 15 cm and height is 20 cm.

51. ## math

Please guys i need your help tomorrow i have a test. *How many plant should my uncle need to plant around his farm of a circular shape of a radius 140 m, If the distance between plants is 50cm?

52. ## math

#Plz i need your help guys (the answer for this question)# If you deposit sh. 100,000 in a bank which gives 12% interest rate per year. How much will you earn after 1 year and 6 months? Steve today at 5:42am That would be 100000 * .12 * 1.5 kelvin today at

53. ## math

The age of Mwenda is 3/5 of that of his sister.If 20 years ago the age of Mwenda was 2/5 that of his sister then. Find the present age of Mwend. #Please guys help me this question#

54. ## math

Three subjects Geography, Science and English in the library are in the ratio of 5:7:8 which they had increased by 20%,40% and 50%. Find the ratio of increased books # Please guys can you assist me this question#

55. ## math sets

out of 320 students at a university,190 taking math,235 taking chemistry and 120 taking physics.125 are taking both chemistry and math,95 taking both chemistry AND PHYSIC,55 TAKING BOTH MATH AND PHYSICS.HOW MANY ARE TAKING ALL THE THREE SUBJECTS

56. ## chem

A sample of H2(g) expands adiabatically and reversibly from a state 1 where p1 = 200000Pa,V1 = 0.002m3 and T1 = 300K to a state 2 where V2 = 0.004m3.Assume the gas to behave as an ideal gas calculate the final temperature and its pressure.Use the constant

57. ## math:age

salima's current age is half that of her uncle.9 years ago the age of salima was 1/3 the current age of her uncle. Find the current age of Salima

58. ## math

find the arc length of the curve y = lnx for x = 1 to x = square root of 8

59. ## math

The gym is sponsoring a basketball elimination tournament with 16 teams entered. Winner play winners until only one team is left. What is the total number of games that must be played?

60. ## life orientation

Identify and explain four types of risk behavior amongst teenagers by means of examples

61. ## math

#please guys help me this question# Three people can wash clothes in 13 hour, 14 hour and 14 hour. If they started together at 8:30 am, at what time will they finish this work together?

62. ## math

By what percentage is 1/40 greater than 1/50? #Please guys help me please this question.#

63. ## math

please people i need your help. *Equal squares as large as possible are drawn on a rectangular board measuring 50 cm by 70 cm. Find the size of the square. Steve today at 8:18pm assuming you mean to cover the entire board, then since GCD(50,70)=10 The

64. ## math

please people i need your help. *Equal squares as large as possible are drawn on a rectangular board measuring 50 cm by 70 cm. Find the size of the square.

65. ## math

Guys please i need your help i am not getting the answer over the following questions. 1) Maria banked sh. 95,000 in her bank account. If the bank gives a simple interest of 17% per year, how much will she get after 3 years? 2) If Mollel got sh. 230,000

66. ## math

#Plz i need your help guys (the answer for this question)# If you deposit sh. 100,000 in a bank which gives 12% interest rate per year. How much will you earn after 1 year and 6 months?

67. ## Biochemistry UB Cameroon

If 8A pass for 2minutes at the cathode(where the following reaction takes place, Ag+ + e- --->Ag) how many grams of silver metal are passed onto the cathode??

68. ## math

16 persons need 56 kg of rice in 1 week. How much rice will be needed by 24 persons in four weeks? ^please anyone over here ryt now may you help me to arrive to the final answer^ 24×(56/16)× 4 math - kelvin today at 2:22pm i had the this idea but i

70. ## math

A woman deposited Tsh 480000 in CRBD which charges an interest of 15% per annum.How much did she get after six months?# anyone to help me plz#

71. ## braindrain

some have more than 100 some none but matiangi has two

72. ## math

Write in italic numeral 1959. #any one to help me please***

73. ## math

Two boys,John and Jackson are running at different speeds of 30 km/hr and 18 km/hr and in opposite directions are 10 km apart.If they both start running at exactly 11:50 pm,at what time will John pass Jackson?Anyone to help

74. ## physics

if a load 1kg streches a cordby 1.2cm.what is the force constantof the cord?

75. ## Math

(x^2+y^2)^2=4(x^2-y^2) Equation of a lemniscate curve

76. ## Pre-Calc

Find the values of the trigonometric functions of è from the information given. (sin è, cos è, csc è, sec è, cot è) tan è = −2, sin è > 0

77. ## Algebra

Using complete sentences, explain how to graph y = x - 2 using the slope-intercept method.

78. ## algebra

Solve x: 2 over 5x+2=10

79. ## math

If x represents the total number of bags a person checks and each person checks more than two bags, the equation below can be used to determine C, the total fee for all the bags. 20 + 25 + 50(x - 2) = C Arianna paid a total of \$145 to check all her bags on

80. ## 192

a pizza has a radius of 9inches. the pizza is divided into sections. one of the section has a central angle with a measure of 60 degrees wat is da area of this section of pizza? what happens to the area of the sector if u double the central angel? how much

81. ## math

A fireman stood on the mioddle step of a ladder, shooting water into a burning building . As the smoke lessened, he climbed up three steps and continued his work. the fire got worse,so he had to go down five steps. Later he climbed up the last six steps

82. ## college - economics of china

"Hi there! Can you tell me about economics of China? Can you suggest any credible source that I can look up for those information?

83. ## math

#Please guys help me how to sole this question# A man borrowed sh. 40,000 from NMB bank which charges an interest rate of 12% for 3 years. How much will a man pay after 3 years?

84. ## math

please guys help me this question, how to solve it. Calculate the total surface area of a hollow cylinder whose radius is 15 cm and height is 20 cm. (a)3297 cm^2 (b)1884 cm^2 (c) 3768 cm^2 State why you choose a,b or c?

85. ## math

please guys help me this question, how to solve it. Calculate the total surface area of a hollow cylinder whose radius is 15 cm and height is 20 cm. What formula can be applied between (a) SA = 2pie*r*h + 2pie*r^2 (b)SA = 2pie*r*h State the reason why you

86. ## math

#Please guys i need your help for this question# Sample charges: Greeting telegram on a special code;50 cents Ordinary telegram costs shs 3 for 10 words and each extra word at 30 cents. Find the cost of the following telegram. CHARLES MUSHI BOX 123 MUSHI

87. ## math

Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much was used for other expenses? #Please guys help me this question?# Steve yesterday

88. ## math

How many plant should my uncle need to plant around his farm of a circular shape of a radius 140 m, If the distance between plants is 50cm? #Please guys i need your help#

89. ## math

Mr. Ismail invested sh. 36,000 in the bank which gives an interest of 20% per year. After how long will he get sh. 43,200? #please people help me this question how to arrive to final answer. Also i need to know if sh. 43,200 is either the total amount of

90. ## math

#Anyone to help me this question# If 6 men can take 8 hours to complete a job for 5 days. How long will 4 men finish the job if they use 6 hours?

91. ## math

Guys help me this question. four yrs ago, Katie was twice as old as Anne was then. In 6 yrs, Anne will be the same age that Katie is now.How old is each now

92. ## math

Please people i need your help whoever knows# Mrs Ally went to the market with sh.10,000 to buy the following items; 5 kg of rice @ sh. 600, 2 kg of meat @ sh. 2000, 2 heaps of onions @ sh. 150, 2 kg of sardines @ sh.700 and bus fare sh. 300 @ journey. How

93. ## math

Three subjects Geography, Science and English in the library are in the ratio of 5:7:8 which they had increased by 20%,40% and 50%. Find the ratio of increased books # Please guys can you assist me this question#

94. ## math

Three people can wash clothes in 1/3 hrs, 1/4 hrs and 1/4 hrs. If they started together at 8:30 am, at what time will they finish this work together? *Please anyone to help me out this question*

95. ## math

The distance between two towns P and Q is 390 km. John left town P at 7:30 am and travelled towards town Q at an average speed of 60 km/hr. Half an hour later Patrick left town Q and travelled towards town P at the same speed. At what time did they meet? *

96. ## math

If a trapezium was drawn such that it has got two right angled triangles,why the area of that trapezium will differ if someone is considering the areas of two right angled triangles lastly he/she add to obtain the total areas from the one who will use the

97. ## math

9 men dig a farm for 5 days.How many days will 6 men take into finish the same farm?

98. ## math

Find the difference between the sum of even numbers between 100 and 110 and the product of prime numbers between 20 and 30. #anyone to help me out