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please tell me the answer of this question.
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Answers
Answer:
Answer of the 2nd question!
Answer:
1.Newton's Second law of motion :-
The rate of change of momentum is directly proportional to the force applied on the system.
Force applied is directly proportional to the product of mass and acceleration .
Let be the initial and final momentums respectively.
According to newton's second law :-
pf - pi / t ∝ F
We know that, Momentum ( P) = mv .
Let v be the final and u be the initial velocity .
Now,
mv - mu / t ∝ F
F ∝ m ( v-u) /t
F ∝ ma.
F = kma.
Here, K is the proportionality constant. It's value is 1 .
Units of Force are given by the units of mass and acceleration. Units of force is Kgm/s² .
In accordance to honour the contributions of Newton, 1 kgm/s² is termed as 1 Newton.
2.characteristics of plant belonging to division of bryophyta :
1.These are called amphibians of the plant Kingdom.
2. the plant body is commonly differentiated to form stem and leaf like structure.
3. however, there is no specialised tissue for the conduction of water and other substances from one part of the plant body to another.
4. examples are moss( funaria) and marchantia