How are sound energy and light energy similar?
a. they both need a medium to travel through.
b. they are both carried from place to place by particles.
c. they are both kinds of mechanical energy.
d. they both have a wavelength and a frequency

What are chlorofluorocarbons made of

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?