The medium of a mechanical wave is the matter through wich it travels? tru or false

Let's say you place a metal tray of foam pieces on top of a Van de Graaff generator. You turn it on and nothing happens right away but in a few seconds the foam pieces begin flying out of the pan. Why does this happen? A.

Describe the type of geographical features and natural disasters that can oucar

A boy pushes a box with a horizontal force across a rough surface. He then changes the direction of his force to be diagonal into the ground. He pushes with the same force as before.

What in the world is infrared radiation

Give the name of the element that is represented by the atomic symbol Fe. A) Fermi B) Ferrous C) Igneous D) Iron

Most metallic ores are produced by which two of processes? a) Metamorphic and Sedimentary b) Igneous and Metamorphic c) Igneous and Sedimentary d) Cementation and Compaction

Two persons are applying forces on two opposite sides of a moving cart. The cart still moves with the same speed in the same direction. What do you infer about the magnitudes and direction of the forces applied?

SI unit of mass and gravity

What is the difference between porosity and permeability

In the diagram below, the planets' relative distances from the Sun are shown. The sizes of the planets are not drawn to scale.