In the circuit diagrammed in Figure P32.25, assume the switch has been closed for a long time interval and is opened at t 5 0. Also assume R 5 4.00 V, L 5 1.00 H, and e 5 10.0 V. (a) Before the switch is opened, does the inductor behave as an open circuit, a short circuit, a resistor of some particular resistance, or none of those choices? (b) What current does the inductor carry? (c) How much energy is stored in the inductor for t , 0? (d) After the switch is opened, what happens to the energy previously stored in the inductor? (e) Sketch a graph of the current in the inductor for t $ 0. Label the initial and final values and the time constant.
Biogeography in a Changing World GEOG 2 Lecture 4: Biological Interactions and Distributions Professor D. Cusack dcusack@geog.ucla.edu Office: 1113 Bunche 1 What factors determine the spatio- temporal distributions of organisms History Chance Physical Biological climate competition topography predation soils symbiosis dispersal disturbance Human activity 2 Biological Interactions • Niche Theory • Predation • Competition • Symbiosis Niche Theory • The n-dime
