The difference between tropical and temperate is the mainly the result of ​

Amplitude is a measure of a waves a; speed b; distance c; energy d; frequency

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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