Helium gas (a monatomic gas, constant specific heats) is compressed from 16 psia and 85◦f to 120 psia in a steady-state compressor. the inlet volume flow rate is 8 ft3/s. assume internally reversible process with negligible changes in kinetic and potential energy and ideal gas behavior. determine the power input [hp] and heat transfer rate [btu/s] for each of the following processes (include p − v, t − s diagrams for each): a. isentropic process b. polytropic process with n

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87