Arod having a diameter of 2 cm and a length of 10cm has one end maintained at 200°c and is exposed to a convection environment at 25°c with h = 40 w/m2 k. the rod generates heat internally at a rate of 50 mw/m3 and the thermal conductivity of the rod is k 35 w/m k. (a) derive the nodal equation for node 3, using symbols for h, k, ax, d and q (b) -substitute numerical values for each of the given quantities and obtain an expression for the unknown nodal tem- perature t3.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.

In the first law of thermodynamics, triangle e=q-w, what does q stand for