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

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct