An air-standard thermodynamic cycle consists of isentropic compression with pressure ratio R, isobaric heat addition, isentropic expansion and isobaric heat rejection. The ratio of specific heats is denoted by γ, which expression gives the thermal efficiency:

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Which feature of a heating curve indicates a change ofn state

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?