Consider steady heat transfer between two large parallel plates at constant temperatures of t1 = 210 k and t2 = 150 k that are l = 2 cm apart. assume that the surfaces are black (emissivity ε = 1). determine the rate of heat transfer between the plates per unit surface area assuming the gap between the plates is filled with atmospheric air.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

State the following: boyle's law and charle's law

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?