In [1]:

```
# Variables
weight = 981. #weight of payload in N
gmoon = 1.62; #acceleration due to gravity on the moon in m/s**2
g = 9.81; #acceleration due to gravity on earth
# Calculations
mass = weight/g; # Calculations of mass of the payload in kg (calculated as F = m*g)
weightmoon = mass*gmoon; # Calculations of weight of payload on the moon in N
# Results
print ' The weight of payload on the moon = %d N'%(weightmoon);
```

In [14]:

```
# Variables
l = 15.; #length of the child's head in cm
b = 12.; #breadth of the child's head in cm
p = 101325.; #atmospheric pressure in Pa
# Calculations
area = (l*b)/(10**4); # Calculations of area of the child's head in m**2
force = p*area; # Calculations of force exerted on the child's head due to atmospheric air in N
# Results
print ' The force exerted on the childs head due to atmospheric air = %.2f N'%(force);
```

In [13]:

```
import math
# Variables
rho_water = 1000.; #density of water flowing through the pipeline in kg/m**3
rho_manomtr = 1595.; #density of manometric fluid (carbon tetrachloride) in kg/m**3
l = 40.; #length between the selected sections in cm
theta = 45. #inclination of the manometer in degrees
g = 9.81; #acceleration due to gravity in m/s**2
# Calculations
delp = (l/100.)*math.sin((theta*math.pi)/180.)*g*(rho_manomtr-rho_water); # Calculations of pressure drop between the required sections in Pa
# Results
print ' The pressure drop between the required sections = %.2f Pa'%delp
```