2.2 Use the E notation and give the number of protons, neutrons and electrons of the hou
following elements:
39
1
(2) 13%Ba
(
(1
)
K
19
ok
​

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) =_