A cyclist competes half round of a circular track of a diameter 636m in 1.5 minutes . find the velocity​

Select all the correct answers. which three statements about electromagnetic radiation are true?

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.

What happens when the vapor pressure of a liquid is equal to the external pressure?