(me if you can)
a wall is made up of four elements, as follows: ½” wood siding r = 0.81 ½” plywood sheathing r = 0.62 3 ½” fiberglass r = 10.9 ½” sheetrock r = 0.45 (units of r-value are ft2-hr-of/btu)
a. how many btu per hour would be would be transferred through a 1 sq. foot section of the wall if the outside is 50of colder than the inside.
b. in which direction (in or out) would the heat flow? (units of r-value are ft2-hr-ºf/btu)
c. what is the heat transfer through the wall (in btu/hr) if the insulation was not installed?

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.