Answer:
exit velocity = 62 m/s
exit pressure is 98.52332 kPa
Explanation:
given data
pressure p1 = 80 kPa
temperature t1 = 27°C = 300 K
velocity v1 = 220 m/s
temperature t2 = 42°C = 315K
area exit = 370 cm²
lose heat at a rate = 18 kJ/s
gas constant of air = 0.287 kPa·m^3/kg·K.
h1 = 300.19 kJ/kg
h2 = 315.27 kJ/kg
to find out
exit velocity and exit pressure
solution
first we apply here energy balance equation to find out outlet velocity
Einlet = Eoutlet
m(h1 + v1²/2) = m (h2+v2²/2) +Q
m(v1²-v2²) /2 = m (h2 -h1) +Q
v2² = v1² - 2Cp Δt - 2Q/m
here Δt = h2 - h1 and put all value
v2² = 220² - 2(1.005)10³ (15) - 2(18)10³ /2.5
exit velocity = 62 m/s
so
now find outlet pressure that is
p2 = mRT / A2 v2
put value
p2 = 2.5 (287) 315 / (370 
62)
p2 = 98.52332 kPa
exit pressure is 98.52332 kPa
high velocity is the answer as baby oil is dense
Given parameters;
Time taken to complete a lap = 8.667s
Radius of flower = 13.9cm
convert to SI unit of m, 100cm = 1m
13.9cm gives 
= 0.139m
Unknown = speed
To solve this problem, we need to first find the circumference of the flower.
Circumference of the circular flower = 2 π r
where r is the radius of the flower;
Circumference = 2 x 3.142 x 0.139 = 0.87m
Now to find the how fast the bug is travelling,
Speed = 
Since the bug covered 1 lap, the distance is 0.87m
Now input the parameters and solve for speed;
Speed = 
= 0.1m/s
The bug is travelling at a speed of 0.1m/s
The type of pure substances that can create elaborate structures is :
( D ) Atoms that are not attracted to each other because they will stay still and end up laying on top of each other.
<h3>What is an Elaborate structure ?</h3>
An elaborate structure is a complex structure formed by the combination of different unrelated parts. Atoms that are un attracted to each other are made of different parts therefore when they come together they will lay on each other, forming an elaborate structure which is complex in nature.
Hence we can conclude that the type of pure substance that can create elaborate structures is Atoms that are not attracted to each other because they will stay still and end up laying on top of each other.
Learn more about elaborate structure: brainly.com/question/508618
I’m pretty sure it’s just gas
