While a train is moving forward, a 25,000-N force on the train in the forward direction, and then an additional 26,000-N force acts in the opposite direction. What is the net force?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

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.

Which atomic model was proposed as a result of j. j. thomson’s work?