Select the false statement
options:

elements are pure substances with unique properties.

mixtures like muddy water or salt water can never be separated.

compounds are unique substances that form when two or more elements combine chemically.

a mixture is a combination of two or more substances that keep their original properties and just intermix

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^−2m on an edge at the ocean's surface, decrease by 7.5 x 10−10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^−2, delta v=7.5x10^−10. at some point l needs to be cubed. why p is divided by delta v?

Blank liquids and gases exert a buoyant force on objects placed in them