CBSE BOARD X, asked by patrabapan098, 3 days ago

1.What is the radius of curvature if the focal length of a concave mirror is 15 cm ?
2.How do you know if a gas is heavier than air?
Please solutions

Answers

Answered by kaarthikpranesh

1

Answer:

1.) Radius of curvature = 30 cm.

2.) Air has an average molecular weight of 29. If the molecular weight of any gas is higher than 29 then they are heavier gases.

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