What is one way in which sending information by digital signals is better than sending it by analog signals? A The equipment for analog signals costs more.
B Analog signals can't transmit sound information.
C Analog signals suffer more interference.
D The range of analog signals is only a few meters.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.

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 =

snell's law

refractve index = sin incidence / sin refraction