which pair of rays would be part of a ray diagram showing reflection? - a & b which pair of rays would be part of a ray diagram showing refraction? c & a

If the light undergoes refraction at the interface, then the event is described by the rays A and C .

If the light undergoes reflection at the interface, then the event is described by the rays A and B .

Oops.  I see that these are answers.  Somehow I must have stumbled onto the set of Jeopardy.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min