When starting a heavy train, why will train engineers sometimes back up, stop, and then proceed forward? (This technique is called "bunching slack.")

Which of these statements best supports the conclusion that a substance is in the plasma phase? A) The substance is flowing. B) The substance has low kinetic energy. C) The substance is at a high temperature.

54) Although Neptune is the farthest planet from the Sun, it travels in a fixed orbit around the Sun and never changes its path. What is the reason for this? A) The magnetic pull of the Sun holds Neptune in its orbit.

Rays of light strike a bumpy road and are reflected. What can be predicted about the reflected rays? They will not follow the law of reflection. Each will reflect at the exact same angle of reflection. They will all travel in the same direction.

Partial melting and the production of magma takes place at? this is for 8th grade class

A child carries a 3N book at a constant velocity 4 meters across a horizontal floor. What is the net work done?

What are some biotic factors in an ocean?

Which statement best compares potential and kinetic energy

Why is the speed of the earths plate measured in centimeter per year instead of in meter per second?

La altura de un tornillo de banco respecto a la superficie es de 80 cm expresar dicha medida en pies ...

A 2 kg mass hangs motionless from a partially stretched spring having a spring constant of 172 N/m. What is the magnitude of the force (in N) that would be required to pull the mass down by an additional 5 cm? Never include units with your answer.