PHYS 2101 Lecture 9: PHYS 2101 9

By substituting T=T(m)+A(s)exp(-z/d)sin[(2pi/P)(t-t(m))] intodT/dt=(d/dz)[(k/C(s))(dT/dz)]=(d/dz)[a(h)(dT/dz)], verify that theformer is a solution of Fourier's equation of heat conductionthrough a homogenous soil medium, and then, derive the expressionfor the ground heat flux.

T(m)-->the mean temperature of the surface
A(s)-->amplitude
P-->period
t(m)--> the time when T(s)=T(m)

What is the force on an electron that has a velocity equal to 2.0 106 m/s i - 3.0 106 m/s j when it is in a region with a magnetic field given by 0.90 T i+ 0.55 T j - 0.30 T k?

A transverse periodic wave is represented by equation z(y,t)=1.50 cm sin(1250 rad/s t +10m^-1 y). What is the k vector of ther wave?