©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
ENGR 103 - Test 2 Defintions
Integral - answer✔Area under a curve
Derivative - answer✔slope of the tangent line to a curve
Area of a Rectangle - answer✔A=lw
Area of a Triangle - answer✔A=1/2bh
Area of a Trapezoid - answer✔A=1/2(b1+b2)h
"Negative Area" - answer✔Negative area can exist numerically. When calculating an integral
just subtract it from the positive area.
Fluids - answer✔randomly arranged molecules held together by weak cohesive forces; fluid
flows under the slightest stress and continues flowing as long as stress is present
Solids - answer✔molecules arranged in crystals (orderly on a lattice)
elastic (solid) - answer✔finite deformation under load; recovers original shape when unloaded
plastic (solid) - answer✔finite deformation under load; does not return to original state
liquid - answer✔"incompressible"
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
volume=constant
may have a free surface (subject to its own vapor pressure)
Gas - answer✔very compressible
expands to fill a containment
"incompressible" - answer✔high bulk modulus (constant density)
large change in pressure = small change in volume
compressible - answer✔gases with low bulk modulus
pressure - answer✔normal force exerted per unit area by a fluid
atmospheric pressure - answer✔pressure exerted at a certain location
absolute pressure - answer✔pressure referenced to a perfect vacuum
gauge pressure - answer✔uses atmospheric pressure as a reference; difference between absolute
and local atmospheric pressure
12/3/2024 11:27AM
ENGR 103 - Test 2 Defintions
Integral - answer✔Area under a curve
Derivative - answer✔slope of the tangent line to a curve
Area of a Rectangle - answer✔A=lw
Area of a Triangle - answer✔A=1/2bh
Area of a Trapezoid - answer✔A=1/2(b1+b2)h
"Negative Area" - answer✔Negative area can exist numerically. When calculating an integral
just subtract it from the positive area.
Fluids - answer✔randomly arranged molecules held together by weak cohesive forces; fluid
flows under the slightest stress and continues flowing as long as stress is present
Solids - answer✔molecules arranged in crystals (orderly on a lattice)
elastic (solid) - answer✔finite deformation under load; recovers original shape when unloaded
plastic (solid) - answer✔finite deformation under load; does not return to original state
liquid - answer✔"incompressible"
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
volume=constant
may have a free surface (subject to its own vapor pressure)
Gas - answer✔very compressible
expands to fill a containment
"incompressible" - answer✔high bulk modulus (constant density)
large change in pressure = small change in volume
compressible - answer✔gases with low bulk modulus
pressure - answer✔normal force exerted per unit area by a fluid
atmospheric pressure - answer✔pressure exerted at a certain location
absolute pressure - answer✔pressure referenced to a perfect vacuum
gauge pressure - answer✔uses atmospheric pressure as a reference; difference between absolute
and local atmospheric pressure
