The diagram below shows a light ray striking Medium A and Medium B at the same angle. Air
Air
50
50:
Medium A
Medium B
Which statement is correct?
The speed of the light ray is the same in air and Medium A
The speed of the light ray is the same in air and Medium B.
O Medium A and Medium B have different densities because light refracts at different angles.
O Medium A and Medium B have the same density because the light ray strikes both at the same angle.

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?