Afree falling rock is released at an altitude of 50 m. earth's gravity g = 9.81 m/s^2 is the only force acting upon the rock. (i. e. no atmospheric drag). plot the altitude, velocity, and acceleration as a function of time (4 seconds in 0.05 second steps) in one figure using the "subplot" function. in a second figure plot the velocity as a function of the altitude.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?