Un rayo de luz que se propaga en el aire
entra en el agua con un ángulo de
incidencia de 45°. Si el indice de
refracción del agua es 1.33. Cuál es el
ángulo de refracción

A) 45°
B) 40°
C) 32°
D) 30°

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

The ability to make things happen is also called a. heat b. force c. matter d. energy

Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.