All of the following are types of models EXCEPT O a theory.
Dan analogy.
Oa physical replica.
O a mathematical representation.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.