Which of the following is the best definition of radiation?
a.
the transmission of heat without any contact
b.
the transmission of heat across matter
c.
the transfer of heat by electrical currents
d.
the transfer of heat by currents within a liquid or gas

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?

The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?

What is formed when amino acids form long chains or polymerize