Need !
when a basketball player jumps to make a shot,

a.)the downward force on the floor is equal to the upward force on his feet
b.)the force with which he jumps is equal to the force with which he shoots the ball
c.)the forces on the player’s feet and on the floor are both in the upward direction
d.)the action-reaction forces are unequal because they act on different objects

Clike bone scan for find heart

Answer body lying face up ;

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.