Give reason.
(a) Two astronauts floating close to each other in space can’t talk to
each other without using any special device.
(b)It is easier to differentiate the voice of men from women.
(c) Friction is a Necessary Evil.
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Answer:
hai
Explanation:
a) air need a median to travel such as water, air, solid, space is vaccum
b)it is because men's voice is harder than female's voice. female voice is feeble
c)it is because friction very important to us in some cases like writing, holding things. but some times disadvantage because it wears the material whether they are screws, ball bearings or soles of shoes, some energy is wasted over coming friction
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