Melting is considered a(n) ___ change because energy is gained by the substance as it changes state A. Physical.
B. Chemical.
C. Volume.
D. Dynamic.

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

Name the element in group 17, period 2. (periodic table)

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *