Which isotope is used to treat cancer?
(1) c-14 (3) co-60
(2) u-238 (4) pb-206

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

The fact that the total amount of energy in a system remains constant is a(n)

What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m