Kinetic energy = (1/2) (mass) (speed²).
A Physicist in the canoe, or on a raft floating downriver next to the canoe, will say that the canoe's kinetic energy is zero.
A Physicist on the riverbank, watching the canoe drift by at 1 m/s, will say that its kinetic energy is 9 Joules.
They're both correct.
I don't know about it your answer will give another people
Answer:
A. Materials with a low index of refraction cause light to refract very little.
Answer:D
Explanation:
It was right o khan academy
