Seismic station A is 5000 kilometers from the epicenter. What is the difference between the arrival time of the first P-wave and the arrival time of the first S-wave recorded at this station? 2 minutes 20 seconds
6 minutes 40 seconds
8 minutes 20 seconds
15 minutes 00 second

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line