Luke is a 225-pound professional rugby player who normally speaks with a deep voice. Yet when he talks to his baby daughter Rae, his voice takes on a higher pitch and a singsong quality. Why?

How do changes in the mass of an object affect its motions?

The Solar System formed from the ... A. Collapse of an interstellar cloud B. Collision of two massive stars C. Explosion of an interstellar sun D. Grouping together of asteroids

What name is given to the variable we plot on the x-axsis

How are electrons distributed in the molecular orbitals, when the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule?

Briefly explain what water is. in your explanation include what a water molecule is, what elements makes up water and draw a molecule structure of the water molecule

Electricity problem (coulomb's law)

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

In order for convection to occur, you must have

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?

In what way are all forms of potential energy the same?