Why is plasma called the "fourth state of matter"? I've recently heard that plasma is sometimes referred to as the "fourth state of matter". Why is this? Why is it not the first, second or third?

large cylindrical water tank is mounted on a platform with its central axis vertical. The water level is 3.75 m above the base of the tank, and base is 6.50 m above the ground. A small hole 2.22 mm in diameter has formed in the base of the tank.

Describe how sound waves bend. What is this called and give an example of the bending of sound waves.

A wave has a frequency of 440 hz and a wavelength of 0.77m. What is the velocity of the wave

Which of the following would not be useful in trying to correct spherical aberration a. using a combination lens made up of lenses, each of which has a different index of refraction b. using a circular stop to block out the outside rays of light c.

What is a difference between physical traits and personality traits? A. Physical traits are mainly determined by a person's environment; personality traits are determined by both a person's genes and environment. B.

The model that describes a Sun-centered solar system is called theA. laws of motion. B. geocentric model. C. heliocentric model. D. general theory of relativity.

A truck on a straight road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed of 20.0 m/s. Then the truck travels for 20.0 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.

which of the following best describes the amount of natural resources found here in the united states. coal is the only natural resources found in abundance in the US. Natural resources here are lacking and must all be imported to the us.

A ""zero-net energy"" building: A. is built using only natural raw materials B. can last longer than a traditional building C. produces as much as or more energy than it uses D. produces less than half the solid waste of a traditional building E.

What's the net force acting on an 18-kg object if an acceleration of 3.0 m/s2 is produced?