Answer:
Potassium argon dating
Explanation:
Potassium argon dating is a method used in determining the origin of a rock. I is done by comparing the ratio of radioactive argon to radioactive potassium in the rock. This method is used to date rocks that are thousands of million years old.
the assumptions made when using the Potassium argon dating include :
- no argon was left after formation of the rock
- no argon has either entered or escaped the sample since it was formed.
Answer:
latitudes that are (a) and (b)
longitudes that are (c) and (d)
Explanation:
we get here line of latitudes that are
for
(a) N 34 08' 44.9"
it is north 34 degree 8 minute 44.9 seconds
it is Northern Hemisphere
and
(b) S 18 09' 30.3"
it is south 18 degree 9 mint 30.3 seconds
it is Southern Hemisphere
and
here
(c) E 10 25' 41.3" and ( d) W 118 07' 02.3"
they are not at line of latitude
they are at line of longitude because east and west
as we know that N and S are at Latitudes
and E and W are at longitudes
If the sin 30° = 0.5, then the cos 60° = 0.5
Question A
Correct option is (iii) sought after, as it is indicated in the passage that "I was overwhelmed with gratuitous advice". Gratuitous means not required, or not necessary. Hence the author was not asking for advice, it was not sought after
Question B
Correct option is (iv) when he was on the steamer. It is indicated at the end of the passage that "The fellow passengers in the steamer began to advise us". After reading the statement, "I should want them after leaving Aden", you might feel that the correct option could be (ii) when he was in Aden, but the passage doesn't give enough information to confirm that the advice was give at the point when he was in Aden
Question C
The correct option is (iii) meat-eating would keep him healthy. It is indicated in the passage that "The majority of them said I couldn't do without meat in the cold climate. I would catch consumption.". Hence, the meat was supposed to keep him healthy and not catch consumption.
Question D
The correct option is (iv) he had promised his mother he would not do so. It is indicated in the passage that "My mother, before consenting to my departure, had exacted a promise from me not to take meat. So, I was bound not to take it, if only for the sake of the promise.".
