What happens to the total mass of a substance undergoing a physical change?

It stays the same.

It doubles.

It triples.

It is reduced.

Air is matter which backs best support the statement

In a radio, pulse modulation refers to encoding a wave with information by: a) adjusting the height of the waves b) adjusting how many waves are produced per second c) turning the wave on and off d) changing the medium in which the waves travel

What is one way to describe elements A. They are the building blocks of matter B. They are the smallest pancies of any matere C. They break down easile D. They are the mostepensive materas on sen

Identify the following as a suspension or a colloid. sand in water

The perforating canals run perpendicular to osteons. a. True b. False

What's the difference between solids and liquids?

Which type of reaction will for a chemical bonded combination

What kind of change is salt dissolving in water

Which of these is the most effective way for manny to cool down after kickboxing? start static stretches to increase his flexibility walk around to lower his heart rate sit and catch his breath to avoid light-headedness run one to three miles to

One of the driving forces of plate motion is: A. volcanic eruptions along coastlines B. meteor impacts in the ocean basins C. convection currents in the mantle D. hot liquid magma in the inner core