ENGR 103 - Test 2 Defintions With Solutions

ENGR 103 - Test 2 Defintions With
Solutions

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"




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)