A horizontal steel pipe having a diameter of 5 cm is maintained at a temperature of 50oC in a large room where the air (h = 6.5 W/m2.oC) and wall temperature are at 20oC. The surface emissivity of the steel may be taken as 0.8. Calculate the total heat lost by the pipe per unit length.

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.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid