Aprofessional boxer hits his opponent with a 1025-n horizontal blow that lasts 0.150 s. the opponent's total body mass is 116 kg and the blow strikes him near his center of mass and while he is motionless in midair.

determine the following.

(b) the opponent's final velocity after the blow

1.29 incorrect: your answer is incorrect. try to express the impulse in terms of the force and time the force acts and also in terms of the mass and speed. then see if you can combine these two expressions for the impulse to determine the final speed. m/s

(c) calculate the recoil velocity of the opponent's 5.0-kg head if hit in this manner, assuming the head does not initially transfer significant momentum to the boxer's body.

30.0 incorrect: your answer is incorrect. if the blow is to the head rather than the body, how does your solution to part (b) get modified? m/s

The inside surface of a cylindrical-shaped cave of inner diameter 1.0 m is continuously covered with a very thin layer of water. the cave is very long and it is open on both ends. the water on the cave surface is at a constant temperature of 15.5 °c. the cave is constantly exposed to wind such that 15.5 °c air flows through the cave at 4.5 m/s. the kinematic viscosity of the air is 14.66 x 10-6 m2/s and the molecular diffusion coefficient of water vapor in the air is 0.239 x 10-4 m2/s. because the cave diameter is so large, the flow of wind down the length of the cave, in the x direction, can be treated like it is external flow and the cave surface can be approximated as flat where appropriate. calculate the x value, in a) the transition to turbulent flow occurs at rex meters, where the air flow transitions from laminar to turbulent along the inside surface of the cave b) calculate the x value, in meters, where the bulk steady state concentration of water vapor in the air flowing in the cave is 10% of the saturation concentration. assume the air at the surface of the water layer is 100% saturated with water vapor. assume the wind entering the cave contained no moisture before it entered the cave. take into account the transition from laminar to turbulent flow when solving part b