I only
II only
I and II only
II and III only
Correct answer is C
Statements I & II are correct
Statement III is incorrect because short sightedness is corrected by using suitable concave or diverging lens
Hence; option C is the correct option
10m
350m
175m
125m
Correct answer is D
Difference in time = 1 sec
echo time = 1 \(\div\) 2 = 0.5 sec
Difference of cliff from ship = 0.5 x 250
= 125m
1.5 x 10\(^8ms^{-1}\)
2.0 x 10\(^8ms^{-1}\)
3.0 x 10\(^8ms^{-1}\)
4.5 x 10\(^8ms^{-1}\)
Correct answer is B
n = \(\frac{\text{speed in air}}{\text{speed in glass}}\)
1.5 = \(\frac{3 \times 10^4}{\text{speed in glass}}\)
Speed in glass = 3 x 10\(^8\)m/s / 1.5
= 2 x 10\(^8\)m/s
I only
II only
III only
I, II and III only
Correct answer is C
No explanation has been provided for this answer.
A hydrometer is an instrument for measuring the
a depth of water of water in a vessel
relative density of a liquid by the method of flotation
relative density of a liquid by finding the apparent loss in weight
relative humidity of the air
Correct answer is B
No explanation has been provided for this answer.
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