Aplastic cube is immersed in water having an index of refraction of 1.33. a laser beam in the plastic strikes the interface at an angle of 14.5° with the normal in the plastic. in the water, this beam makes an angle of 21.8° with the normal. what is the speed of light in the plastic cube? (c = 3.0 × 108 m/s)

Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk,in meters?

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

When barack obama was running for president, at a campaign stop he tried to bowl, something he isn't very good at. the media loved it because he threw a gutter ball while they were all watching. this is an example of: