Show all work: A rock contains 125g of a radioactive isotope with a half-life of 150,000 years and 875g of its daughter material. How old is the rock according to radioactive dating ?

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.

The heliocentric and the geocentric models of the solar system included these central principles

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?