A convex mirror is used as a driving mirror because
I. its image is erect
II. It has a large field of view
III. It has a long focal length
Identify the CORRECT statement(s)
I and III only
I and II only
II and IIII only
I, II and III only
Correct answer is B
No explanation has been provided for this answer.
When a sound wave passes from air into water its
speed and frequency increases but its wavelength remains the same
speed and wavelength increases but its frequency remains the same
speed decreases
speed increases but its frequency and wavelength decreases
Correct answer is B
No explanation has been provided for this answer.
2
32
23
3
Correct answer is D
Relative density of solid
weight of solidweight of an equal volume of water
= 4.84.8−2.8
= 4.82 = 2.4
Relative density of liquid
= Weight of liquid kerosineWeight of an equal volume of water
= 4.8−3.24.8−2.8 = 1.62 = 0.8
= Ratio of relative density of solidRelative density of Kerosine
= density of soliddensity of Kerosine
= 2.40.8
= 3
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