Which statements about observations and inferences are correct? Select all that apply. A. Inferences can never be proven. B. Inferences are always based on observations. C. Something that is commonly known is always an observation. D. Information obtained using a tool is not an observation. E. Inferences may be true or false. OF. Observations are always made using the five senses. OG. Scientists use observations to explain how things work.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Which describes increasing the efficiency of energy resource

Find the steady-state temperature at the center of the plate = /2, = /2) for sums of w from n=1 to n=19 (only odd values). find the value of n for which the change in /2, /2) is less than 1% from the value at the previous n. at this point, we consider the solution converged. does the value of the temperature at the center seem reasonable? in this part, the values of x and y are constant scalar values. you should produce a plot of the value of n on the horizontal and the estimate of the temperature at the center of the plate on the vertical. b. using the value of n (or larger) that resulted in convergence in part (a), create a contourf plot of the temperature distribution across the entire plate. use enough spatial subdivisions to create a useful plot. comment on the results. hint: you need to determine what “x” and “y” values to use to make your t matrix. i recommend using a different number of x and y values. use enough x and y values so that the plot is “smooth”.