A man at the back of a crowd watches a parade by holding a plane mirror just above his head. The parade passes 6 metres behinde his head and the mirror is 0.25m in front of the man. How far does the image in the mirror appear to be from the man?
6.50m
6.25m
6.00m
5.75m
5.50m
Correct answer is A
No explanation has been provided for this answer.
A piece of stone weighs 180 N in air and 150 N in a beaker containing 160 N of methylated spirit. What is the up thrust exerted on the stone?
50N
40N
30N
20N
10N
Correct answer is C
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