Questions and answers by

kelvin

Questions (162)

Transplänting genetic material into bacteria is a sim-ple task.
1. 1 answer
2. 174 views
As the senior prefect of your school,you have been invited to tell the parent teacher association(PTA)what your school need
1. 1 answer
2. 631 views
Q4. Radioactive elements decay via first-order kinetics. Consider a certain type of nucleus that has a rate constant of 2.4 ×
1. 1 answer
2. 269 views
Q3. Which of the following statements is/are true of nuclear fission?1. For the nuclear fission process to be self-sustaining,
1. 0 answers
2. 384 views
Q2. How long will it take for 98.6% of a sample of Au to decompose (t1/2 = 8.8 min)? Please write down the duration with a unit
1. 2 answers
2. 361 views
Q1. If a tree dies and the trunk remains undisturbed for 13,750 years, what percentage of the original 14C is still present?
1. 1 answer
2. 680 views
The solubility of CO2 in water at 25 degrees Celsius and 1 atm is 0.034 M. What is the Henry's law constant (k) with a unit of L
1. 1 answer
2. 416 views
What is the osmotic pressure created by 20.0 mg of insulin dissolved in 10.0 mL of solution at 27 degrees Celsius? The molar
1. 1 answer
2. 354 views
How many grams of a nonvolatile compound B (molar mass = 97.8 g/mol) would need to be added to 250 g of water to produce a
1. 1 answer
2. 413 views
Calculate the van't Hoff factor for a solute that is a univalent-univalent weak electrolyte and is 25% ionized.a. 15.0 b. 1.75
1. 1 answer
2. 305 views
which resource would you use to see if the library has a print copy of the book, research method for scientist
1. 1 answer
2. 702 views
Who can help me out?Explain how analytical chemistry studies relate to development issues and goals of the world?
1. 0 answers
2. 409 views
please help me guysFind the sum of all even numbers between -10 and 10
1. 1 answer
2. 319 views
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
1. 1 answer
2. 483 views
Please guys help me this question to get the answers.How many 1/3 are there in 2 1/2?
1. 1 answer
2. 389 views
#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
1. 1 answer
2. 526 views
#please people i need your help over this question#How much should George be loaned by the bank that offers an interest of 23%
1. 0 answers
2. 401 views
#please people i need your help over this question#How much should George be loaned by the bank that offers an interest of 23%
1. 1 answer
2. 399 views
one lady borrowed sh. 100,000. If she is required to pay an interest of 5% of the borrowed cash every month, how much money will
1. 1 answer
2. 584 views
please guys help me this question, how to solve it.Calculate the total surface area of a hollow cylinder whose radius is 15 cm
1. 1 answer
2. 406 views
please guys help me this question, how to solve it.Calculate the total surface area of a hollow cylinder whose radius is 15 cm
1. 2 answers
2. 516 views
please guys help me this question, how to solve it.Calculate the total surface area of a hollow cylinder whose radius is 15 cm
1. 3 answers
2. 512 views
#Please people help me the solution of this question#Ali was born 29th February 1980. How many birthdays he celebrated until
1. 1 answer
2. 451 views
#please people help me the solution of this question#Change 7380 seconds into hours and minutes.
1. 5 answers
2. 395 views
#please people help me the solution of this question#Change 7380 seconds into hours and minutes.
1. 2 answers
2. 490 views
Between 1:2:3 and 3:4:5 which is greater?
1. 2 answers
2. 385 views
*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
1. 1 answer
2. 464 views
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
1. 1 answer
2. 706 views
Please anyone to help me solve this questionA piece of copper wire is 52 2/3 m long. If each piece has been cut of 3/4 m from
1. 1 answer
2. 581 views
Please anyone to help me solve this questionA piece of copper wire is 52 2/3 m long. If each piece has been cut of 3/4 from it.
1. 1 answer
2. 597 views
What is the next number in the following sequence:-4, -1, 1, 2, _
1. 2 answers
2. 805 views
#please guys help me this question#Three people can wash clothes in 13 hour, 14 hour and 14 hour. If they started together at
1. 1 answer
2. 472 views
Please guys help me out this question#What is 1/4 in 24?
1. 1 answer
2. 373 views
#Please guys i need your help for this question#Sample charges: Greeting telegram on a special code;50 cents Ordinary telegram
1. 3 answers
2. 683 views
A circula garden whose radius is 14 m is fenced by posts which are 6 m far apart from each other.Find the number of posts which
1. 1 answer
2. 510 views
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
1. 1 answer
2. 519 views
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
1. 3 answers
2. 543 views
By what percentage is 5 greater than 4?
1. 1 answer
2. 353 views
By what percentage is 1/40 greater than 1/50?#Please guys help me please this question.#
1. 2 answers
2. 550 views
please i need your help guys.A rectangular cake measuring 120 cm by 72 cm is to be divided into square pieces of the same size
1. 2 answers
2. 629 views
please people i need your help.*Equal squares as large as possible are drawn on a rectangular board measuring 50 cm by 70 cm.
1. 5 answers
2. 915 views
Please i need a help also to this questionMwajuma needs 70% to receive a grade C in a certain subject.If the exam has 120
1. 5 answers
2. 546 views
please people i need your help.*Equal squares as large as possible are drawn on a rectangular board measuring 50 cm by 70 cm.
1. 3 answers
2. 564 views
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
1. 1 answer
2. 506 views
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
1. 3 answers
2. 530 views
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
1. 2 answers
2. 751 views
Plz i need your help how to solve and arrive to the answer#A richman wants to earn one million shillings in 10 years. What
1. 1 answer
2. 363 views
#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
1. 1 answer
2. 708 views
#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
1. 1 answer
2. 516 views
#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
1. 4 answers
2. 484 views
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?#pleas
1. 1 answer
2. 439 views
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?#pleas
1. 2 answers
2. 1,316 views
#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
1. 1 answer
2. 562 views
Please anyone to help me#Write the following time using roman numerals. a. 5:40 am b. 6:00 pm
1. 3 answers
2. 397 views
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
1. 1 answer
2. 513 views
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
1. 1 answer
2. 456 views
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
1. 0 answers
2. 515 views
#Please guy i need your help over this question how to do it.Mrs Ally went to the market with sh.10,000 to buy the following
1. 4 answers
2. 367 views
If I will be given a loan of sh. 500000 and required to pay a monthly interest of 5%. How much will I pay after 8 months?#Please
1. 1 answer
2. 457 views
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
1. 1 answer
2. 528 views
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
1. 2 answers
2. 609 views
If the difference between 21 and k is 48. Find the value of K#Please anyone to help me this question# Can the value of K be -27.
1. 1 answer
2. 403 views
Explain the factors that affect the intensities of absorption in IR spectroscopy.#Please anyone to help me with explanation i
1. 3 answers
2. 864 views
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
1. 1 answer
2. 969 views
A bus fare from Arusha to Dar es salaam is sh. 12,000. If the bus goes two trips carrying 7 passengers, how much will be
1. 1 answer
2. 470 views
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
1. 1 answer
2. 516 views
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
1. 1 answer
2. 531 views
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
1. 2 answers
2. 602 views
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
1. 6 answers
2. 745 views
Ali rode a bicycle from town A to town C through town B as follows.He rode from A to B a distance of 45 km in 3 hours and then
1. 1 answer
2. 574 views
Ali rode a bicycle from town A to town C through town B as follows.He rode from A to B a distance of 45 km in 3 hours and then
1. 1 answer
2. 589 views
If a trapezium was drawn such that it has got two right angled triangles,why the area of that trapezium will differ if someone
1. 0 answers
2. 560 views
If a trapezium was drawn such that it has got two right angled triangles,why the area of that trapezium will differ if someone
1. 2 answers
2. 656 views
The three co-ordinates of a rectangle are A(3,-4), B(-1,4), C(4,2).Find the fourth co-ordinate#Plz guyz may you help me out this
1. 1 answer
2. 314 views
The three co-ordinates of a rectangle are A(3,-4), B(-1,4), C(4,2).Find the fourth co-ordinate#Plz guyz may you help me out this
1. 3 answers
2. 540 views
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
1. 2 answers
2. 684 views
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
1. 1 answer
2. 1,124 views
How many minutes are there between 11:40 night and 8:10 morning?please help me out
1. 3 answers
2. 467 views
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
1. 2 answers
2. 495 views
Asha deposited sh. 280,000 into the bank.After 4 years her savings reached sh. 386,400.Find the amount of interest per year paid
1. 3 answers
2. 552 views
find the next number in the following sequence; 3,5,7,11,_#anyone to help me plz #
1. 1 answer
2. 334 views
9 men dig a farm for 5 days.How many days will 6 men take into finish the same farm?
1. 2 answers
2. 464 views
Find the difference between the sum of even numbers between 100 and 110 and the product of prime numbers between 20 and 30.#anyo
1. 4 answers
2. 911 views
i need your help guys#A fruit vendor bought 600 apples for $ 4800. He spent $ 400 on transportation. How much should he sell
1. 5 answers
2. 1,343 views
1A56B is a five digit number. When 1A56B is divided by 36 the remainder is 23. How many possible value can A take?#anyone to
1. 1 answer
2. 349 views
Find the ratio of LCM to GCF of 9,18 and 52#anyone to help me please
1. 1 answer
2. 507 views
I need anyone to help me please#Cecilia travelled a distance of 24 km at a speed of 18 km per hour. She rested for 30 minutes
1. 1 answer
2. 469 views
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
1. 1 answer
2. 764 views
find the square root of 21
1. 3 answers
2. 489 views
write zero in roman numeral.
1. 1 answer
2. 644 views
Find the cost of buying 4 dozen of exercise books at sh 6000 per dozen,a half dozen of pencil at sh 2050 per dozen,5 dozen
1. 2 answers
2. 804 views
Dallas was given a discount of 10 percent of the following items:1/1/4 cartons of exercise books @ sh 42000 per cartons,ten
1. 1 answer
2. 542 views
Dallas was given a discount of 10 percent of the following items:1/1/4 cartons of exercise books @ sh 42000 per cartons,ten
1. 1 answer
2. 472 views
Find the cost of buying 4 dozen of exercise books at sh 6000 per dozen,a half dozen of pencil at sh 2050 per dozen,5 dozen
1. 2 answers
2. 742 views
A woman deposited Tsh 480000 in CRBD which charges an interest of 15% per annum.How much did she get after six months?# anyone
1. 2 answers
2. 459 views
out of 320 students at a university,190 taking math,235 taking chemistry and 120 taking physics.125 are taking both chemistry
1. 1 answer
2. 878 views
some have more than 100 some none but matiangi has two
1. 2 answers
2. 330 views
a boy spends 3/8 of his money on food and 2/5 of the remainder on books, and had $15.how much did he have
1. 1 answer
2. 462 views
If vector a + vector b + vector c = 0.and magnitude of a = 3,magitude of b = 5 and magnitude of c = 7.Find the angle between a
1. 1 answer
2. 437 views
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
1. 1 answer
2. 667 views