Mr. johnson challenged his students to see which group could dissolve salt the fastest in 100 ml of water. the students could change any variable(s) except the volume of water used. group 1 changed the water temperature. they used tap water at 22oc and then three other temperatures: 32, 42, and 52  oc. they did not stir the mixture and they kept the volume of the water constant, just like mr. johnson directed. the salt dissolved fastest in the warmest water. in their conclusions, group 1 wanted to include a line graph of their data.  what label(s) should they place on the x axis? a)rate of dissolving. b)volume of water used. c)time to dissolve (sec). d)temperature of water

In a system, when potential energy decreases, then entropy also decreases. true false

What is the largest meteoroid that has collided with this planet

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”.