Aship has a length of 150 m and wetted area of 3000 m2. a model of this ship 5m in a ship has a length of 150 m and wetted area of 3000 m2. a model of this ship 5m in surface has skin resistance of 49.05 n/m2 at a velocity of 3 m/s and the velocity index is 1.85. the corresponding values for the model surface towed in fresh water are respectively 16.38 n/m2, 3m/s and 1.90. calculate : (i) the corresponding speed of ship (ii) the shaft power required to propel the ship at this speed through sea water (p =1030 kg/m3). take the propeller efficiency as 75%.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k