Ascientist builds an apparatus to measure the charge to mass ratio of ions. an ion is first accelerated to a speed of 5.00 x 10 m/s. it then passes through a region of magnetic field, with a of 1.88 x 10-2 t, perpendicular to the lon's velocity. because the lon is moving so fast, it is only in the presence of the magnetic field for 2.00x 10-7s upon exiting the magnetic field, the scientist measures that the ion was defilected a distance of 3.00 cm in a direction perpendicular to its initial velocity (e) what is the ratio of the absolute value of the lon's charge to its mass (in c/kg)? assume the velocity change is small, and that the component of the velocity along the lon's original direction does not change noticeably. c/kg (b) suppose the scientist determines the ion is singly charged, that is, the magnitude of its charge is that of a proton. what is the mass of the ion (in kg)? kg

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

reserve is the answer

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia