The specific heat capacity of a particular liquid is 3000 J kg-1 K-1. A large beaker containing
2 kg of the liquid has to be warmed from 25 ℃ to 35 ℃. A 100 W heater is used. If all the
thermal energy could be transferred to the liquid, how long would it take?
2. Question | Chemistry
To make car bodies we use:
3. Question | English A
Choose the ONE underlined part A, B or C that is inappropriate. If the sentence is acceptable as it stands, choose D.
Had they not been forewarned, they might have joined the queue, not knowing that gas was not on sale at that station.
4. Question | Biology
Leaves are thin and flat:
5. Question | Physics
In which one of the following four cases would the pressure be greatest?
6. Question | Chemistry
A salt that contains water of crystallisation is:
7. Question | Mathematics
Which of the following is a prime number?
8. Question | Physics
When a metal wire carries an electric current, charges flow through it.The moving charges are:
9. Question | Chemistry
All of the following are non-metals EXCEPT for:
10. Question | Chemistry
In an atom the neutron is found:
11. Question | Mathematics
A store charges 6% VAT on all sales. What
is the total cost of a shirt marked at $30 ?
12. 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
13. Question | Chemistry
To remove limescale from a tap you need:
14. Question | Chemistry
The Periodic Table is arranged in order of:
15. Question | Chemistry
A salt that is anhydrous contains no:
16. Question | Physics
The lowest and the highest frequencies a typical young person′s ear can detect are
approximately:
17. Question | Mathematics
Items bought by a trader for $80 are sold for $100. The profit expressed as a percentage of cost price is
18. Question | Mathematics
The average of a set of numbers reduces from 14 to 11 when the number 35 is removed. How many numbers were in the original set?
19. Question | Information Technology
In data representation, a __________ represents one character which may be a letter, number, or punctuation mark.