# initialization of variables m=10 # mass in Kg V=5 # velocity in m/s KE=m*V**2/2 # kinetic energy in N-m print "The Kinetic Energy is ",round(KE)," N.m"
The Kinetic Energy is 125.0 N.m
# initialization of variables V= 3*5*20; # Volume of air in m^3 from dimensions m= 350.0; # mass in kg g= 9.81; # gavitational acceleration in m/s^2 rho=m/V;# density print " The Density is ",round(rho,3),"kg/m^3 \n" v= 1/rho # specific volume of air print " The specific volume is", round(v,3),"m^3/kg \n" gama= rho*g # specific weight of air print " The specific weight is", round(gama,2)," N/m^3"
The Density is 1.167 kg/m^3 The specific volume is 0.857 m^3/kg The specific weight is 11.45 N/m^3
# initialization of variables h=0.020 # height of mercury in m gammawater=9810 # specific weight of water in N/m^3 Patm=0.7846*101.3 # atmospheric pressure in kPa from table B.1 Pgauge=13.6*gammawater*h/1000 # pressure in Pascal from condition gammaHg=13.6*gammawater P=(Pgauge+Patm)# absolute pressure in KPa #result print "The Pressure is",round(P,2)," kPa"
The Pressure is 82.15 kPa
import math # initialization of variables d=10.0/100 # diameter of cylinder in 'm' P=600 # pressure in KPa Patm=100 # atmospheric pressure in Kpa K=4.8*1000 # spring constant in N/m deltax=(P-Patm)*(math.pi*1000*d**2)/(4*K) # by balancing forces on piston #result print "The Compression in spring is",round(deltax,3)," m"
The Compression in spring is 0.818 m
# initialization of variables ma=2200 # mass of Automobile 'a' in kg va=25 #velocity of Automobile 'a' in m/s before collision va1=13.89 # velocity of Automobile 'a' after collision in m/s mb=1000 # mass of Automobile 'b' in kg vb=24.44 #velocity of Automobile 'b' after collision in m/s KE1=(ma*va**2)/2 # kinetic energy before collision KE2=(ma*va1**2)/2+(mb*vb**2)/2 # kinetic energy after collision U=(KE1-KE2)/1000 # internal energy from conservation of energy principle in kJ #result print "The increase in kinetic energy is of",round(U,1)," kJ"
The increase in kinetic energy is of 176.6 kJ