Một con lắc lò xo đặt nằm ngang gồm lò xo có độ cứng 10N/m và vật có khối lượng 100g. Kích thích cho con lắc dao động điều hòa . Xác định độ lớn của lực đàn hồi khi vật cách vị trí cân bằng một đoạn 2cm. L ấy g=10m/s2.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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i will be your freind and say    

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =