The pressure in an automobile tire depends on the
temperatureof the air in the tire. when the air temperature
is25oc, the pressure gage reads 210kpa. if the volume
ofthe tire is 0.025 m3, determine the pressure rise in
thetire when the air temperature rises to 50oc.
also, determine the amount of air that must be bled off to
restorepressure to its original value at this temperature. assume
theatmospheric pressure to be 100 kpa.
do the calculations asssuming an ideal gas and thenrepeat the
calculations using a compressibility factor.

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

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

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.