Position coordinate of a particle confined to

move along a straight line is given by s=

2t

3–24t+ 6, where s is measured in meters

from a convenient origin and t is in seconds.

determine: (a) time required for the particle

to reach a velocity of 72 m/s from its initial

condition at t= 0, (b) acceleration of the

particle when v= 30 m/s, and (c) net

displacement of the particle during the

interval from t= 1 s to t= 4 s.

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)

Of is j/kg·k. if a 2.6 kg of isk to k,is ?

Acorporation gives out its profits as dividends paid to whom?