7-Derive the expression for the current density of a conductor in terms of the conductivity and applied electric field. Explain with reason how the mobility of electrons in a conductor changes when the potential difference applied is doubled keeping the temperature of the conductor constant​

Asher cycles 12 miles in 16 hours. what is his speed?

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?