two planets have the same mass, but planet x has twice the radius of planet z. how does the acceleration due to gravity compare between the two?

i believe it is b. what was the cause of the big bang

hope this !

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

we need to know the time interval during which the force acts. impulse of force = momentum change

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 =