3. Observe the adjacent figure and answer the following questions : a) What is the name of the electric device
who’s (I, V) characteristic is D1? D2 ?
b) In what current does the two devices have
the same voltage?
c) Find the voltages of D1 & D2 at I=1A.
d) Find the characteristics of each device.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

The solid that is formed and usually sinks to the bottom of a solution is the

Which sections of the heating curve illustrate this process?