Which of the following is the primary medium for beach erosion? ice gravity wind water

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Write the correct abbreviation for each metric unit

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the