Sound becomes louder in an empty room. Why? Give reason

An African elephant can reach height of 13 feet and possess a mass of as much as 6000kg determine the weight of an African elephant in Newton's

A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the average collision force is correct? A) The truck experiences the greater average force.

What two things do you need to know to describe the velocity of an object?

A student places a large pot of cold water on a stove and heats it for one minute. Then she takes the pot of water off the burner and places it on the counter.

If the earth makes one orbit around the sun what is it called

two punds of water vapor at 30 psia fill the 4ft3 left chmaber of a partitioned system. The right chmaber has twice the volume of the left and is initially evacuated.

Why do we eat today

Which statement about ammeters and voltmeters is true? A. Current and voltage are the same throughout a circuit so where you place the ammeter and voltmeter doesn't matter. B.

Teens realize that things may be "shades of gray" after they enter Piaget's social stage. identity crisis stage. menarche stage. formal operational stage.

Technician A says that fractured rods have a unique mating surface and that only the cap that was fractured is the one that will fit that rod. Technician B says that a powdered metal rod is less expensive, lighter, and as strong as a forged rod.