Peter visits his grandmother every Saturday. The diagram below shows a graph that describes the distance he travels over time. Which of the following tables matches the information in the above graph? A. TIME (minutes) TOTAL DISTANCE (kilometers) 0 0 15 15 40 30 50 45 65 60 B. TIME (minutes) TOTAL DISTANCE (kilometers) 0 0 15 15 30 40 45 50 60 65 C. TIME (hours) TOTAL DISTANCE (miles) 0 0 15 15 30 40 45 50 60 65 D. TIME (minutes) TOTAL DISTANCE (kilometers) 0 0 15 15 30 25 45 10 60 15

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.