71 Un mobil se deplasează pe o dreaptă plecand din punctul de coordonată +10 m si ajunge in punctul de coordonată - 10 m, in timp ce alt mobil pleacă pe aceeasi dreaptă din punctul de coordonată 10 m și ajunge in punctul de coordonată +10 m. Prin ce se aseamănă si prin ce se deosebesc miscarile acestora? plAm nevoie repede.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

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 =

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.