A100 μf capacitor is subjected to a voltage pulse having a duration of 4 s. the pulse is described by the following equations: vc(t)=⎧⎩⎨5t3v,−5(t−4)3v,00≤t≤2s; 2s≤t≤ 4s; elsewhere, where t is in seconds.

part a select the correct current pulse that exists in the capacitor during the 4 s interval.
select the correct current pulse that exists in the capacitor during the 4 interval.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

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

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