Ahall probe serves to measure magnetic field strength. such a probe consists of a poor conductor 0.155 mm thick, whose charge-carrier density is 1.05 × 1025 m3. when a 2.67-a current flows through the probe, the hall voltage is measured to be 4.89 mv. what is the magnetic field strength?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?

Mark creates a graphic organizer to review his notes aboutelectrical force.which labels belong in the regions marked x and y?

James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. why did he expect a difference