Zoom a 50,000 kg box car traveling at 5.5 m/sec and is loaded with a dubious cargo. as it travels north on a railroad track it collides inelastically (stickage) with 3 empty box cars ( at rest ) which have a combined mass of 30,000 kg. determine the final velocity of these cars as they travel down the track.

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.

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses? a) 34.5 grams b) 35.0 grams c) 35.5 grams d) the mass cannot be determined without knowing the volume