Two resistors, one of 4 Ω and one of 6 Ω, are connected in parallel.Their combined resistance is:
2. Question | Biology
The optimum temperature for enzyme action is:
3. Question | Mathematics
This question refers to the triangle PQR in
which angle QPR = 90°, PR = 12 cm and
PQ = 5 cm.
The length of QR, in cm, is
4. Question | Biology
The main site of action of ADH (antidiuretic hormone).
5. Question | Biology
AIDS is a killer disease because:
6. Question | Information Technology
All of the following devices are commonly used non-impact printers EXCEPT __________.
7. 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
8. Question | Principles Of Accounts
A trader received an invoice for $4,000 less 25% trade discount. Subsequently he returned one eighth of the goods. What amount would be entered in his Returns Outwards Account?
9. Question | Mathematics
2p2 -15p + 25 =
10. Question | Chemistry
One example of an emulsifying agent is:
11. Question | Biology
Which one of the following is NOT a reflex action?
12. 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.
13. Question | Chemistry
If a reaction takes 50 seconds at 25 ℃, then at 50 ℃ the time for the reaction in seconds is likely to be about:
14. Question | Mathematics
3 4/5 expressed as a decimal is
15. Question | Physics
Dividing 9 × 10-2 by 3 × 10-8 gives:
16. Question | Biology
The part of the brain that processes information from the sense organs is the:
17. Question | Chemistry
When metals react with acids they give a salt and:
18. Question | Mathematics
8x - 4(x - 5) =
19. Question | Mathematics
The shaded area in the Venn diagram above
represents
20. Question | Biology
Plant stems grow towards a light source.This is an example of: