Ablock of mass 0.75 kg is suspended from a spring having a stiffness of 150 n/m. the block is displaced downwards from its equilibrium position through a distance of 3 cm with an upward velocity of 2 cm/sec. determine: a)- the natural frequency b)-the period of oscillation c)-the maximum velocity d)-the phase angle e)-the maximum acceleration

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

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

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.