Why did Jim Bridger build a fort along the Oregon Trail? AGave travelers a safe spot to hide from bears
B Offered protection to explorers against the British
C Rest stop and good spot for trading post
D Shelter for Native Americans during snowstorms

Amarble, a bowling ball, a basketball, and a baseball are rolling across the floor at 10 m/s. which one has the greatest kinetic energy? the marble the bowling ball the basketball the baseball

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?