For 1.0 W of electrical input power, a certain loudspeaker produces a sound pressure level of 92 dB at a distance of 1 m from the speaker. When sound is radiated uniformly into a hemisphere, a handy rule is that the sound power level at the source is 8 dB greater than the level at 1 m. For this speaker, the sound power level at the source LW = dB and the sound power W =
W

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

it was given as a lesson and guide for prayer.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it