The weight of a vehicle is 14 kn. the wheel base is 3 m and the centre of gravity is 650 mm above the road surface. the track width of the vehicle is 1,5 m. the vehicle must negotiate a curve which is banked at 20° with a radius of 130 m. assume a coefficient of friction between the wheels and the road surface of 0,6. determine the maximum speed in km/h at which the vehicle can travel around the curve safely.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.