D-Q-1 Write T for true Statement or F for False Statement. [1]. Heat transfer: is transit mass between the bodies of materials due to the temperature difference. [2]. Conduction: is this phenomenon replay to random motion, translational motion, rotational motion and internal vibrational motion of particles. [3]. The thermal diffusivity represents how fast heat diffuses through a material [4]. A material that has a low thermal conductivity or a low heat capacity will have a large thermal diffusivity. [5]. Heat transfer by radiation does not require the presence of an intervening medium. [6]. Convection is the mode of energy transfer between a solid surface and the adjacent liquid or gas that is in motion [7]. Conduction: is cold transfer from the higher particles activity to lower activity due to the temperature difference [8]. The larger the thermal diffusivity, the non-faster the propagation of heat into the medium [9]. The convection heat transfer coefficient in W/m. [10]. he rate of convection heat transfer is expressed by Newton's law of cooling [11]. Radiation is the energy emitted by matter in the form of electromagnetic waves as a result of the changes in the electronic configurations of the atoms or molecules [12]. The idealized surface that emits radiation at this maximum rate is called a blackbody. [13]. The radiation emitted by all real surfaces is less than the radiation emitted by a blackbody at the same temperature. [14]. The fraction of the radiation energy incident on a surface that is absorbed by the surface is termed the absorptivity [15]. Convection is commonly classified into three sub-modes: Forced convection, Natural (or free) convection and Change of phase (liquid/vapor, solid/liquid, etc.) Q-2; Plane wall has thickness 100mm and thermal conductivity k=100W/m.K, and the steady state conditions occurs at T1=[Colum] K, T2=[Row] K. Calculate the heat flux q'x' and temperature gradient dT/dx?

An elastic foundation is often used to support heavy machinery that vibrates in such a way to cause problems for the rest of the structure. An elastic foundation with two equal springs each of stiffness k = 600 lbs/in is used to support the equipment of weight W = 1000 lbs shown. The equipment vibrates in such a way that it causes a vertical forcing function P(t) = 100 sin(20t) [lbs]. %3D (a) Draw the degree of freedom for the motion of the machinery. (b) Determine the equation of motion. What type of motion is this? (c) Determine the natural frequency and the displacement of the machinery. (d) What is the maximum amount of force that will be felt by the rest of the structure? (Think about what causes force to the rest of the structure) Rest of structure Hww