The total charge accumulated by a certain device is given as a function of time by
q(t) = 16.8 t^2 - 1.7 t^4 C.
Find:
(a) What total charge is accumulated at t=2s
(b) What is the maximum charge accumulated in the interval 0 (c) At what rate is the charge being accumulated at t=0.8s?
Use explicit methods (calculus) to determine your answers.21 s.

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.

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

Fluids at rest possess no flow energy. a)- true b)- false