1. Which is not a characteristic of a compound?
•has different properties from its component elements
•can be represented by a chernical formula
•different samples have different properties
•a pure substance made of two or more elements

In what direction does the medium move relative to the direction of the wave? explain.

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?