Assuming ideal gas behavior, determine the speed of sound in refrigerant-134a at 0.8 mpa and 55°c. the gas constant of r-134a is r = 0.08149 kj/kg·k. its specific heat ratio at room temperature is k = 1.108. the speed of sound in refrigerant-134a is m/s.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

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 =

false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.