Which of the statements below are true about scientific theories. select all that apply.

Blank is the amount of energy in a sound wave per unit of time and is also related to the loudness of a sound

The different layers of gases that extend form the surface of the earth into space

Ateacher attaches a ball to a meter long string and whirls it around in a horizontal circle at constant speed. the teacher explains that the string is what makes the ball go in a circle. why is the string necessary? a) the string is needed to apply a torque to the ball. b) the string is needed to push on the ball to get it up to speed. c) circle motion requires an inertia which is provided by the string. d) circle motion requires a force to give it a centripetal acceleratio