7. La luz que emite una nave espacial tarda 30 segundos en llegar a la Tierra. La distancia entre la Tierra y la nave es: a) 300.000 km
b) 1.200.000 km
c) 9.000.000 km
d) 25.000.000 km

Dalton’s model of an atom is the best described as a) a solar system b) a solid sphere c) a cloud d) a scoop of chocolate chip ice cream

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?