Please help me with this question. Every help is appreciated.

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

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) =_