A cyclic heat engine operates between the temperatures of 825° C and 555° C. Its efficiency is one-third the efficiency of an ideal
(Carnot) engine that operates between these same two
temperatures. Calculate how much input heat is required for this
engine to perform 1.00 kilojoules of work.
O 12.2 kJ
9.17 kJ
3.98 kJ
446 kJ

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.