75 g of freshly dug soil was placed in an oven at 105 ℃ for 24 hours. It was allowed to cool, then reweighed. If the final mass of the dry soil was 66 g, what was the % water content of the original soil sample?
5. Question | Physics
The method by which certain uranium and plutonium nuclei can release energy in a reactor is
known as:
6. Question | Mathematics
The value of 5 in the number 357.21 is
7. Question | Mathematics
$x is divided among three boys, Romon,
Deven and Adam, in the ratio 2 : 3 : 7,
respectively.
If Adam gets $28, what is the value of x ?
8. Question | Information Technology
The speed of an ink-jet printer is measured by the number of __________ it can print.
9. Question | Biology
Crossing two brown mice produced an offspring with a black coat.Which of the following statements MUST be correct?
Ⅰ Brown coat is dominant to black.
Ⅱ The brown mice were heterozygous for coat colour.
Ⅲ The black mouse was homozygous for coat colour.
Ⅳ Crossing a black mouse with another black mouse could produce a brown offspring.
10. Question | Social Studies
Removal of forests may cause all of the following EXCEPT
11. 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.
I formed the brilliant idea of climbing the fence and to hang from the top of the rail until the bull went away.
12. Question | Physics
A loudspeaker emits a steady note.A girl sings a note which is of lower pitch but higher volume.
The sound wave she is producing has:
13. Question | Chemistry
In metals, the particles forming the structure are all:
14. Question | Physics
Two resistors, one of 4 Ω and one of 6 Ω, are connected in parallel.Their combined resistance is:
15. Question | Biology
Which one of the following is NOT a function of the placenta?
16. Question | Mathematics
How many grams are in 2.5 kilograms?
17. Question | Integrated Science
Which of the following are all deficiency diseases?
18. Question | Biology
The part of the brain that processes information from the sense organs is the:
19. Question | Biology
Decomposers are important in the process of decay because:
20. Question | Chemistry
To electrolyse solid lead bromide it must first be heated so that: