Physics Flashcards
Define Matter
Any substance that occupies space and has mass
Matter may exist in what three states?
Solid, liquid and gas
Define kinetic energy
Kinetic energy is the energy of motion
Work is the product of what two factors?
Force and the distance moved
What are the parts of a lever?
A rigid bar and a pivot point called the fulcrum.
A wheelbarrow is an example of what class of lever?
A second-class lever.
Are all three states of matter affected by thermal expansion and if so, which state is affected most?
All three states are affected, with gasses being affected the most.
What is a British thermal Unit?
The amount of heat energy required to change the temperature of 1 pound of water, 1 degree Fahrenheit.
Name the three methods of heat transfer?
Conduction, convection and radiation
What term defines the temperature at which all molecular motion ceases?
Absolute zero
Can liquids be compressed?
No, liquids are normally considered incompressible
What are the customary units used to express hydraulic or pneumatic pressure in the united states?
Pounds per square inch
Describe how pressure is transmitted when a force is applied to a confined liquid?
Pressure is transmitted equally in all directions
What formula expresses the relationship between force, pressure and area?
Force equals Area * Pressure
What is the approximate speed of sound at sea level o a standard day?
661 knots or 340 meters per second.