Ahall probe, consisting of a rectangular slab of current-carrying material, is calibrated by placing it in a known magnetic field of magnitude 0.15 t . when the field is oriented normal to the slab's rectangular face, a hall emf of 17 mv is measured across the slab's width. the probe is then placed in a magnetic field of unknown magnitude b, and a hall emf of 60 mv is measured. determine b assuming that the angle θ between the unknown field and the plane of the slab's rectangular face is

Diamond will scratch quartz. true or false

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

How does an observation about an object differ from an inference about that object