| 1 |
what is the time required for half a radioactive substance to decay?
|
Libby factor <br>
Bisecting period <br>
Disintegration period <br>
Half life <br>
|
| 2 |
If we multiply force by its duration what quantity will we get?
|
work <br>
Energy <br>
Impulse <br>
momentum <br>
|
| 3 |
What do you call an infection in the body where pus collects?
|
Infraction <br>
Abscess <br>
gangrene <br>
carbuncle<br>
|
| 4 |
What metallic element is also called wolfram:
|
Technetium <br>
antimony<br>
tungsten <br>
astatine <br>
|
| 5 |
What do you call the positive electrode of an electric cell?
|
Diode <br>
anode <br>
grid <br>
cathode<br>
|
| 6 |
What is the heavlest metallic element?
|
Lead <br>
uranium <br>
osmium <br>
iridium <br>
|
| 7 |
Weight of an object put in a satellite orbiting in space around the earth i8s reduced to:
|
Zero <br>
Half <br>
Same <br>
None of these <br>
|
| 8 |
The speed of sound depends on the medium through which the waves are passing.The speed of sound in gases depends on what?
|
Density <br>
Weight <br>
Volume <br>
Mass <br>
|
| 9 |
What is the only element that burns with nitrogen:
|
Fluorine <br>
Titanium <br>
Antimony <br>
Manganese <br>
|
| 10 |
What unit of frequency is equal to one cycle per second:
|
Hertz <br>
Decibel <br>
Unicycle <br>
Ampere <br>
|
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