Which of the following best describes what causes the phases of the moon?
a. the alignment of the sun, earth and moon (i think it's this one)
b. the speed of the moon around the earth c. the speed of the earth around the sun d. the alignment of the planets

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

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.