Why is testing a leaf for starch a reliable indication that photosynthesis has taken place?
2. Question | Mathematics
The triangle ABC above shows the angle of
elevation of the top, B,
of a tower, BC, from A, to be 30°.
AB = 40 m. The length of BC is
3. Question | Chemistry
The number of carbon atoms in the alcohol, pentanol, is:
4. Question | Chemistry
In a titration the long tube with a volume scale is a:
5. Question | Social Studies
For which of the following purposes is the information collected in a census normally used?
1. To determine the rate of population growth
2. To predict the needs of the society and plan how to satisfy them
3. To estimate the number of government supporters in the country
6. Question | Physics
The following statements describe an ordinary mercury-in-glass laboratory thermometer. Which
one of them is NOT true?
7. Question | Chemistry
More collisions between particles are likely to happen if a solution is made:
8. Question | Mathematics
The range of values of v when
5 - v ≤ 2v - 1 is
9. Question | Integrated Science
Hormonal methods of contraception work by:
10. Question | Mathematics
-7 - (-3) =
11. Question | Mathematics
2p2 -15p + 25 =
12. Question | Social Studies
Which of the following statements is true?
13. Question | Chemistry
In the modern Periodic Table the elements are arranged:
14. Question | Mathematics
The interest rate on investments in a bank
increased from 5 per cent per annum to 6 1/2
per cent per annum. The difference in annual
interest on a deposit of $4000 is
15. Question | Mathematics
A contractor completed five-ninths of a job before a second contractor completed an additional one-third. What fraction of the job is left undone?
16. Question | Integrated Science
Sea breezes result because:
17. Question | Mathematics
Profits in the partnership of Bess, Bill and Bob are shared in the ratio 1 : 2 : 3. If Bill's share of the profits is $300, what is Bob's share?
18. Question | Chemistry
All of these reactions are exothermic EXCEPT for:
19. Question | Mathematics
Which of the following is NOT a prime number?
20. Question | Biology
All of the following are possible consequences of global warming EXCEPT for: