Air at 550oC and 900 kPa is expanded through an adiabatic gas turbine to final conditions of 100 kPa and 300oC. The total power output of the turbine is 1.6 MW. If the inlet velocity is 25 m/s, determine the required inlet pipe diameter. Neglect kinetic and potential energy.

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)