Fundamental constants: e 1.60 x 1019 c - elementary charge me 9.11 x 1031 kg - electron mass 1. the intrinsic concentration of charge carriers in crystalline germanium is 2.0 x 1019 m3. the mobility of electrons is ue = 0.39 m2/(v s) 0.19 m2/(v s). ni and the mobility of "holes" is h (a) estimate the relaxation time t for electrons in crystalline germanium. (b) calculate the electric conductivity of crystalline germanium. (c) calculate the resistance r of a cylindric rod made of crystalline ger- manium that has diameter d = 5 mm and length 20 mm.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

here are some information of the future of geothermal energy:

-the future of geothermal energy can pretty much be summed up with a single word: more

-scientists plan in going deeper than 120 meters

-we are hoping that one day, we will get all of our energy from renewable energy sources such as geothermal energy

hope this !

where is the photo and the answer choices?

3. dark matter

empty space could also be a simple vacuum