A detector close to a sample of radioactive material records 76 counts per second (cps).
Precisely 2 days later the count rate has fallen to 22 cps.The count rate due to background
radiation, taken immediately before and after the experiment, averaged 4 cps. The half-life of the
material is:
2. Question | Chemistry
We use expanded polystyrene cups for heat of reaction experiments because the cups are:
3. Question | Social Studies
Which is the MOST appropriate order of tasks for job seeker?
1. Write applications for the desired jobs.
2. Assess the suitability of the available jobs given his/her qualifications and interests.
3. Collect information about available job vacancies.
4. Question | Integrated Science
Transpiration is:
5. Question | Biology
Which of the following are advantages of asexual reproduction in a flowering plant?
Ⅰ Large numbers of offspring are rapidly produced.
Ⅱ Favourable genotypes are maintained from one generation to the next.
Ⅲ The plant does not need to rely on wind or insects for pollination.
Ⅳ Several identical individuals grow close together.
6. Question | Social Studies
A political campaign is a method used by political parties to
7. Question | Principles Of Accounts
Which of the following documents may be used to inform a customer of an undercharge on an invoice?
8. Question | Chemistry
When solid carbon dioxide turns straight into a gas we call it:
9. Question | English A
Instructions: Select the option A, B, C or D that BEST describe the sentence.
The modern approach to fitness is to adopt a holistic approach: physical, mental and emotional.
10. Question | Chemistry
A ballpoint pen mark can be removed using:
11. Question | Chemistry
When aluminium is extracted by electrolysis, cryolite is added to:
12. Question | Mathematics
The interest rate on investments in a bank
decreased from 8 1/2 per cent per annum to 6
per cent per annum. The difference in annual
interest on a deposit of $2 000 is
13. Question | Social Studies
THE ITEM is based on the following statement.
John, Simon and Harry are cousins who live in the same house.
Which of the following terms BEST describes their relationship?
14. Question | Principles Of Accounts
The following figures are taken from a manufacturing account.
The cost of tie year's production of finished goods is
15. Question | Mathematics
If US$1.00 is equivalent to J$120.00, how
much in US$ would one get for J$9600?
16. Question | Chemistry
Different structures based on the same molecular formula are called:
17. Question | Biology
An enzyme which has an optimum pH of 3 will function best in the:
18. Question | Chemistry
The number of atoms in this formula, H2SO4, is:
19. Question | Mathematics
In the Venn diagram above, the shaded
portion represents
20. Question | Integrated Science
Which of the following tests describes the test for glucose?