DAY 3 Flashcards
G
Gravitation Constant
const 39
Stefan Boltzmann constant
const 31
Co
Speed of light constant
const 28
h
Planck’s constant
const 06
Element associated with the unit seconds
Cesium 133
R, infinite
Rydberg constant
const 16
A cylinder with Platinum iridium alloy is used to define the kilogram. What is the name of the cylinder?
Le Grand K
Mass and Radius of Earth and Moon
Masses
EARTH: m=5.98x10^24 kg (81 * moon mass)
MOON: m=7.35x10^22 kg
Radii
EARTH: R= 6,371 km (3.67 * moon radius)
MOON: R=1,738 km
Single seller
Monopoly
Few sellers
Oligopoly
Traded freely
Perfect competition
Single buyer
Monopsony
Few buyers
Oligopsony
Economic system based on private ownership of businesses driven by competitive market and motivation to profit
Capitalism
Rules for Leap years
- Every 4 years
- Century years must be divisible by 400
Internal force resisting external forces per unit area
Stress
Stress that occurs when a member is loaded by an axial force.
normal stress
Force that causes layers or parts to slide upon each other in opposite directions
shearing stress
Load applied in one plane that would result in the fastener being cut into two pieces.
single shear
A failure mechanism in structural members like slabs and foundation by shear under the action of concentrated loads.
punching shear
For body subjected to uniaxial stress
Ratio: transverse strain/axial strain
Poisson’s ratio
Slope of the stress-strain diagram that is a straight line.
Young’s Modulus
Max stress developed during a simple tension that the stress is a linear function of strain.
proportional limit
Max stress possible during a simple tension such that there is no permanent or residual deformation when the load is entirely removed
elastic limit