A student leaves her house at 9 am, goes to Ridgedale, then goes to Green Mill on Hwy 55, and return home at 9 pm. What was her average velocity over these 12 hours?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.