Thursday, May 26, 2016

Biology (জীবে পরিবহন)

(ক) কোলেস্টেরল কি ?
(খ) উচ্চ রক্ত চাপের কারন ব্যাখ্যা কর।
(গ) চিত্র - P এর চিহ্নিত চিত্র অঙ্কন কর।
(ঘ) আমাদের জীবনে A,B,C,D অংশ গুলোর গুরুত্ব বিশ্লেষণ কর।




Sunday, May 22, 2016

Newton's laws of motion

Inertia : The tendency of  a body to maintain its own state for ever in which the body is at present is defined as inertia.

First law : An object at rest rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.  



Second law : The force acting on an object is proportional to the rate of change of momentum of that object and takes place in the direction in which the force act.

Third law : Every action has an equal and opposite reaction.