1. What critical assumption must you make about the initial vertical velocity of a projectile that is launched horizontally? 2. What can you assume about the horizontal acceleration of projectiles that are launched horizontally?
3. What can you assume about the vertical acceleration of projectiles that are launched horizontally?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.