Heat energy refers to the kinetic energy of molecules. heat can move in a number of different ways: when warm air rises causing
2 answers:
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Answer:
The correct answer is option B.
Explanation:
f = focal length
P = -5.5 D (negative power means that lens is concave)
1 m = 100 cm
f = -0.1818 m = -0.1818 × 100 cm= -18.18 cm
v = -18.18 cm
v = 1.8 cm - far point
far point = 1.8 cm - v =1.8 cm - (-18.18 cm) = 19.98 cm
But closest answer from the given options is option B.Hence, 20 cm is the correct answer.