Answer:
Q = 62 MJ
Explanation:
given data
ideal gas mixture He = 3 kmol
ideal gas mixture Ar = 7 kmol
temperature t1 = 27°C = 300 K
pressure p1 = 200 kPa
solution
we apply here charle's law for pressure p constant that is
v ∝ T ..................1
and put here value we get
\frac{2v1}{v1} = \frac{t2}{300}
solve it we get
t2 = 600 K
so here mass of He is
mass = mole of He × molecular weight He
mass = 3 × 4
mass = 12 u
and
mass of Ar is
mass = mole of Ar × molecular weight Ar
mass = 7 × 40
mass = 280
and
heat supply will be
heat supply = mHe × CpHe × ΔT + mAr × CpAr × ΔT ................2
and here we use gas table and we get
CpHe = 5.19 (kJ/(kg K)) and CpAr = 0.5203 (kJ/(kg K))
put here value and we get
Q = 12 × 5.19 × 10³ (600-300) + 280 × 0.5203 × 10³ ( 600 -300 )
Q = 62 MJ
Answer:
a) 358.8 KJ/kg
b) 0.0977 KJ/K- kg
c) 83.28%
Explanation:
N2 at 300 k. ( use the properties of N2 at 300 k (T1) )
Cp = 1.04 KJ/kg-k , Cv = 0.743 KJ/Kgk , R = 0.1297 KJ/kgk , y = 1.4 ,
Given data:
T2 = 645 k
P1 = 1 bar , P2 = 10.5 bar
<u>a)Determine the work input in KJ/Kg of N2 flowing </u>
Winput = h2 - h1 = Cp( T2 - T1 ) = 1.04 ( 645 - 300 ) = 358.8 KJ/kg
<u>b) Determine the rate of entropy in KJ/K- kg of N2 flowing </u>
Rate of entropy ( Δs ) = Cp*InT2/T1 - R*In P2/P1
= 1.04 * In (645/300) - 0.1297 * In ( 10.5 / 1 )
= 0.0977 KJ/K- kg
<u>c) Determine isentropic compressor efficiency </u>
Isentropic compressor efficiency = 83.28%
calculated using the relation below
( h'2 - h1 ) / ( h2 - h1 ) = ( T'2 - T1 ) / ( T2 - T1 )
where T'2 = 587.314
Answer:
#Selling vehicles
import locale
locale.setlocale( locale.LC_ALL, 'en_CA.UTF-8' )
#Declaration of variables
total_pay=0
total_sales=0
#Selling details
for i in range(0,2):
#Ask the type of sell
type=input("Enter the type of the car you sold(used/new)? ")
#Check error
while(type.upper()!="USED" and type.upper()!="NEW"):
print('ERROR!!!Should be used or new!!Please Re-enter')
type=input("Enter the type of the car you sold(used/new)? ")
#Input price of the car
price=float(input("Enter the price of the car: "))
#Calculations
if(type.upper()=="NEW"):
total_pay+=1500
else:
total_pay+=price*.05
total_sales+=price
#Display results
print('Total Pay of the sale person = ',locale.currency(total_pay))
print('Total Sales = ',locale.currency(total_sales))
Answer:
Explanation:
neither of the technicians is correct
Answer:
C-People biking must follow all rules and laws applicable to a motorist, with some minor exceptions
Explanation:
People biking should ride on the right side of the right lane when safe, except to pass or make a left turn. When there is only one lane for traffic traveling in each direction and passing is permitted, the center of the street is marked with a broken yellow stripe
~Hope this helps!