It means that they were set earlier therefor they are older.
Physical Weathering<span> involves rocks breaking through contact with atmospheric conditions, but </span>Chemical Weathering<span> breaks down rocks with the effect of certain chemicals. They both made rocks and other sediments have cracks in them.</span>Physical and Chemical Weathering<span> both have </span>differences<span>. Here are </span>some<span> of them</span>
Answer:
Explanation:
a )
In space due to weightlessness both astronaut and her oxygen tank will float .
when she throws the tank away from spacecraft , she will have a velocity in opposite direction ie towards the spacecraft . This happens due to conservation of momentum . She creates a momentum away so that she can get a momentum towards the spaceship.
So
m₁ v₁ = m₂v₂
12 x 8 = ( 87 - 12 ) x v₂
v₂ = 1.28 m /s
Time allowed = 2 x 60
= 120 s
So maximum distance upto which she can remain away from spacecraft
= 120 x 1.28
= 153 m .
b )
The Newton's law which explains the theory behind it is "third law of motion" . This law gives law of conservation of momentum .
