(a) in tin at room temperature, the mobility of mobile electrons is about 1.5 ✕ 10-3 (m/s)/(v/m), and there are about 3.7 ✕ 1028 mobile electrons per m3. calculate the conductivity σ. in actual practice, it is usually easier to measure the conductivity σ and deduce the mobility u from this measurement.

To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit

Can anybody me with this? ? (picture included.)

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid