A) Gravity attracts horizontally downwards the weight of any object such a building or a part of building. (True / False) b) Predixes is used to represent quantities which is very small or big in S. I unit. (True / False)
c) 11500 kmh-2 is equal to 0.877 ms-2 . (True / False)
d) Moment of moment force measures the efficiency of the shape of the cross sectional of material to resist bending. (True / False)
e) 123.456 x 108 cm2 is equivalent 1234560 m2. (True / False)

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.