Amodel of a submarine, 1 : 15 scale, is to be tested at 195 ft/s in a wind tunnel with standard sea-level air, while the prototype will be operated in seawater.

determine the speed of the prototype to ensure reynolds number similarity.

If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.