Chapter 2 Oral questions Flashcards
Define matter
Any substance that occupies space and has mass
Name three states of matter
Solid, Liquid, gas
Define kinetic energy
the energy of motion
Work is the product of what two factors?
Force and distance moved (W = F X D)
What are the parts of a lever:
A rigid bar and a pivot point called the fulcrum
A wheelbarrow is what class of lever?
second class
(first class: see-saw, third class: tweezers)
Are all three states of matter affected by thermal expansion? If so, which is affected most?
All three are affected, gases are 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
Three methods of heat transfer?
Conduction, convection, radiation
What term defines the temperature at which all molecular activity stops?
Absolute zero
Can liquids be compressed?
No, liquids are generally considered incompressible
What are the units used to express hydraulic or pneumatic pressure
Pounds per square inch (PSI)
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 = Area X Pressure (F over A I P)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/111/309/263/a_image_thumb.jpg?1659432022)
What is the approximate speed of sound at sea level on a standard day?
661 knots or 340 meters per second