The list of choices that you provided suggests profound silence, which is not too popular among scientists.
Answer:
his is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Air enters a nozzle steadily at 2.21 kg/m3 and 40 m/s and leaves at 0.762 kg/m3 and 192 m/s. The inlet area of the nozzle is 90 cm2.
determine (a) the mass flow rate through the nozzle, and (b) the exit area of the nozzle.
a)0.7956kg/s
b)5.437 × 10⁻³m²
Explanation:
The concepts related to the change of mass flow for both entry and exit is applied
The general formula is defined by

Where,

values are divided by inlet(1) and outlet(2) by


PART A) Applying the flow equation

PART B) For the exit area we need to arrange the equation in function of Area, that is

Explanation:
Assuming no air resistance, the horizontal acceleration at all points is 0, and the vertical acceleration at all points is -g (if near the surface of the Earth, -9.8 m/s²).
Answer:
1. speed is the distance travelled by an object in unit time
2. velocity is the displacement of a body in in unit time
3. formula of speed =total distance (d)÷ total elapsed time