Which of the following statements is true?
a)organic compounds contain only carbon and hydrogen.
b)about 10 percent of all known compounds are organic compounds.
c)organic compounds always contain carbon and hydrogen.
d)organic compounds are produced only in organisms.

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

What ia the energy of an object because of its potential and kinetic energies