An expert in organ transplants, the chief surgeon of the hospital routinely spoke at conferences.

an expert in organ transplants, the chief surgeon of the hospital routinely spoke at conferences.
a. appositive
b. relative clause
c. restrictive phrase
d. restrictive clause

your answer is c) experiments with water vapor showed that elements combine in specific proportions.

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).

you can buy 12 peppers or less. $1.50*12 = $18