Basic Physics Flashcards
What is matter?
Anything that occupies space and has weight.
What are the three states of matter?
Solids, liquids, and gases. (Plasma added in 2007.)
What is standard atmospheric pressure at sea level?
It is considered to be 14.7 psi, 29.92 inches of Mercury, or 1013.2 millibars.
What is the name of the atmospheric phenomenon where cool air is trapped near the earth by warm air? .
A temperature inversion
What is the speed of sound through the air under standard sea level conditions?
It is 662 knots and 750 mph and 1100 fps.
What determines the density of the air (density altitude)?
The temperature and pressure acting upon it.
What are the three basic parts of a lever?
The fulcrum, force or effort, and resistance.
What is a first class lever, and give an example?
A first class lever is when the fulcrum is located between the effort and the resistance. An example of a first class lever is a seesaw.
In what direction is force transmitted in a confined fluid?
Force is transmitted equally in all directions.
What is the formula for computing force, pressure, and area?
Force equals pressure times area or F = P x A.
What is absolute zero?
It is the temperature at which all motion of the molecules will cease entirely in a given sample of gas. It is considered to be -273°C.
What are the two factors involved in work?
Force and movement through a measurable distance.
. How is pressure expressed in hydraulics and pneumatics?
It is expressed in pounds per square inch (psi).
What are the three methods of heat transfer?
Conduction, convection, and radiation.
What is kinetic energy?
Energy due to motion.
