Magnetoencephalography (meg) is a technique for measuring changes in the magnetic field of the brain caused by external stimuli such as touching the body or viewing images of food. such a change in the field occurs due to electrical activity (current) in the brain. during the process, magnetic sensors are placed on the skin to measure the magnetic field at that location. typical field strengths are a few femtoteslas (1 femtotesla=1 ft=10−15 t) . an adult brain is about 140 mm wide and divided into two sections (called "hemispheres" although the brain is not truly spherical), which are each about 70 mm wide. model the current in one hemisphere as a circular current loop 65.0 mm in diameter. a sensor is placed so that it is along the axis of the loop, 3.10 cm from the center. suppose a magnetic field of 4.95 ft is measured by the sensor. according to the model, what is the current in the hemisphere of the brain being measured?

How have the competing explanations' experiments on atoms affected the development of the atomic model?

An isolated conducting spherical shell carries a positive charge. part a which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? electric potential inside the shell is constant and outside the shell is changing as 1/r2 both the electric potential and the electric field does change with r inside and outside the spherical shell electric potential inside and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is equal to zero electric field inside and outside the shell is constant (does not change with the position r), but is not equal to zero electric field inside and outside the shell is changing as 1/r (where r is the distance from the center of the sphere) electric field inside is equal to zero and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is changing as 1/r electric field inside and outside the shell is changing as 1/r2 electric field inside is equal to zero and outside the shell is changing as 1/r2 electric field inside and outside the shell is zero electric field inside is constant and outside the shell is changing as 1/r

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario