Why are the Inner Planets composed mostly of rock and the Outer Planets

composed mostly of gas

What must happen for liquid water to become water vapor

Suppose a train engine is pulling ten cars. The last car becomes separated from the train. What happens to the motion of the rest of the train and why?

Iron's ability to rust is not a physical property because A. it cannot be observed. B. the identity of iron stays the same. C. a new substance with new properties is formed. D. iron is magnetic

The diagram shows a person holding a bow and arrow. Which will most likely increase the kinetic energy in this system? pulling farther back on the string releasing the string holding the arrow higher decreasing the mass of the arrow

Why do gases have low densities?

I am looking for this answer : Which shows a correct order of steps in the scientific method? develop a hypothesis, analyze data, make observations, draw conclusions make observations, draw conclusions, develop a hypothesis, analyze data.

A gas in a piston is compressed doing - 439 j of work, and its internal energy increases by 318 j. how much heat flows? (be careful with + and -. + w = expansion. + q = added, + u = temp goes up) (unit = j)

A loop of wire is placed in a uniform magnetic field. (a) For what orientation of the loop is the magnetic flux a maximum? The plane of the loop is perpendicular to the magnetic field. The plane of the loop is parallel to the magnetic field.

Dr. Arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode.

Stephen buys a new mop he travels 3 km south and the. 4 km east and then 3km north how far does he need to go to get back. To where he started