A friend tells you a way to estimate how far away a lightning bolt strikes. You count the number of seconds between seeing the flash and hearing the thunderclap. Then you divide that number by five to get a distance in mile. In terms of the physics of light and sound waves, does the method make sense?

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.

If you let go of the notebook after lifting it, will it move? how?