Crystal Structure
What are crystals?
A regular geometric shape found in a solid
What is density?
A measure of how much matter is squeezed into a given space
What is elasticity?
The property of a body by which it experiences a change in shape when a deforming force acts on it and by which it returns to their original shape
true or false: steel is an elastic metal
true
what is scaling?
the study of how size affects the relationship among weight, strength, and surface area
True or False: All crystals are evident to the naked eye
False
What is the equation for density?
density = mass/volume
Do all materials return to their original shape when a deforming force is applied and then removed?
No
when is a typical high rise girder compressed?
under a 10 ton load
weight depends on
a. mass
b. volume
c. surface area
b. volume
What tool helped discover more crystals
X-Ray
What is weight density?
The amount of weight a body has per unit volume
What are inelastic materials?
Materials that do not resume their original shape after being distorted.
what are flanges?
the material in I-beams concentrated at the top and bottom
what is the equation for volume?
length x width x height
Does every crystalline structure have its own unique X-Ray pattern?
Yes
What is the equation for weight density?
WD = weight/volume
What is elastic limit?
The distance at which permanent distortion occurs
what is the neutral layer of a beam?
region between the top and bottom where there is neither tension nor compression
if all dimensions of an object were doubled, how much greater would its volume be?
eight times
Are metal crystal structures simple or complex?
Both
What is specific gravity?
What is Hooke's Law
The distance of stretch or squeeze of an elastic material
when does most deformation of a girder occur?
when girders are used horizontally
bonus: on average, what is the number of heartbeats in a mammal's lifespan? (excluding humans)
800 heartbeats