General Chapter 02 Flashcards
Physics
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 gases 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 generally considered in-compressible.
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 times pressure.
What is the approximate speed of sound at sea level on a standard day?
661 Knots or 340 meters per second.