A0.3-cm thick, 12-cm high, and 18-cm long circuit board houses 80 closely spaced logic chips on one side, each dissipating 0.04 w. the board is impregnated with copper fillings and has an effective thermal conductivity of 30 w/m˚c. all the heat generated in the chips is conducted across the circuit board and is dissipated from the back side of the board to a medium at 40˚c, with a heat transfer coefficient of 40 w/m2 ˚c. (a) determine the temperatures on the two sides of the circuit board. (b) now a 0.2-cm thick, 12-cm high, and 18-cm long aluminum plate (k = 237 w/m˚c) with 864 2-cm-long aluminum pin fins of diameter 0.25 cm is attached to the back side of the circuit board with 0.02-cm thick epoxy adhesive (k =

5submission this assignment is worth 20 points total. you are required to submit the following by next lab: 1. (3 points) determine the equation for the output angular velocity ω2 = θ˙ 2 as a function of θ1, ω1 = θ˙ 1 and α. you must show all your work to receive credit. 2. (2 points) use the result of problem#1 to plot ω2 over 0 ≤ θ1 ≤ 360deg with ω1 = 360deg/sec. do this for α = {10,30}deg. show the results on the same plot and properly label the axes, title, legend. for this you can use matlab or ms excel. 3. (3 points) determine the equation for the output angular acceleration ω˙ 2 and create a plot similar to the one in problem#2. 4. (10 points) submit plots of the results (ω2 and ω˙ 2) obtained from creo/mechanism and compare them to results of problem#2 and problem#3. note that you should do these comparisons for the two cases with α = {10,30}deg. 5. (2 points) provide a brief explanation of the results. did they match? what are the implications as misalignment angle increases?

Select the three ways that the parallel-plate capacitor differs from a car battery.

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .