To work out the heat change in a reaction we need to know just three things, the mass, the temperature change and the:
2. 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
3. Question | Biology
A student observed a plant cell through a microscope and made an accurate drawing of the cell.
If her drawing was 80 mm in diameter and had a magnification of ×2000, what was the real
diameter of the cell?
4. Question | Mathematics
Which of the following is a subset of {b, c, d}?
5. Question | Mathematics
6. Question | Biology
Which of the following routes taken by blood in the body is correct?
7. Question | Social Studies
Which of the following are aspects of the socialization process?
Ⅰ. Reproduction
Ⅱ. Religious teaching
Ⅲ. Recreational activity
8. Question | Mathematics
In the diagram, B is due north of A; C is east
of B, and AB = BC.
9. Question | Information Technology
Which of the following device interfaces integrates the device controller into the disk or CD drive?
10. Question | Chemistry
The number of particles in a mole of any gas is always:
11. Question | Mathematics
Items bought by a trader for $80 are sold for $100. The profit expressed as a percentage of cost price is
12. Question | Information Technology
Eight bits are called a __________.
13. Question | Chemistry
The units we use for heat given out by a reaction are:
14. Question | Mathematics
In the rectangle above, if ∠AEB = 80°, then
∠DAC =
15. Question | Chemistry
The number of carbon atoms in the alcohol, pentanol, is:
16. Question | Biology
Asexual reproduction produces:
17. Question | Mathematics
The area of the trapezium ABCD above is
18. Question | Chemistry
The catalyst in the Haber Process is:
19. Question | Chemistry
The major plant nutrients written as NPK refer to phosphorus, nitrogen and:
20. Question | Mathematics
A store charges 15% VAT on all sales. What
is the total cost of a TV set marked at $300 ?
