At noon, ship a is 45 miles due west of ship
b. ship a is sailing south at 5 mph while ship
b is sailing north at 15 mph.
at what speed is the distance between the
ships changing at 3: 00 pm?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies. molten iron has a density of 7.0g/cm cubed. in its solid state, iron has a density of 8.0g/cm cubed.

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.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?