Ahole of diameter d 0.25 m is drilled through the center of a solid block of square cross section with w 1 m on a side. the hole is drilled along the length, l 2 m, of the block, which has a thermal conductivity of k 150 w/m k. the

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

Which changes of state do the labels represent? a: b: c:

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_