If the number of teeth in the gears 1 and 2 are 60 and 40, the module pitch =3 mm, the pressure angle 200 and the addendum = 0.318 of circular pitch determine the velocity of sliding when the contact is at the tip of the tooth of gear 2 and the gear 2 rotates at 800 rpm

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.

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

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.