The speed of sound in neon gas (a=20, y=1.67) at temperature t is measured to be 451 m/s, determine the value of t.

desired temperature comes out to be equal to 293 K

Explanation:

M =20 g/ mol

   = 0.02 kg/mol

γ = 1.67

R is (gas constant) = 8.314 J/ mol K

we know that,

hence the desired temperature comes out to be equal to 293 K.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

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 =