Let pp, qq, rr, and ss be the following propositions:

pp: colonel mustard was murdered
qq: the butler did it
rr: miss scarlet is lying
ss: the murder weapon was the candlestick
which of the following corresponds to the proposition: either miss scarlet is lying or the butler didn’t do it, but not both

select one:

r⊕¬qr⊕¬q

q⊕rq⊕r

r∨¬qr∨¬q

s↔¬r

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk