Julie walked to her friend's house to spend the afternoon. she walked at 4 mph. when she went home, she ran at 6 mph so she wouldn't be late. what is true about her average speed and average velocity? aher average speed is smaller than her average velocity bher average speed and her average velocity are the samecher average speed is 0, but her velocity is notdher average speed is grater than her average velocity

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?