A0.3-cm thick, 12-cm high, and 18-cm long circuit board houses 80 closely spaced logic chips on one side, each dissipating 0.04 w. the board is impregnated with copper fillings and has an effective thermal conductivity of 30 w/m˚c. all the heat generated in the chips is conducted across the circuit board and is dissipated from the back side of the board to a medium at 40˚c, with a heat transfer coefficient of 40 w/m2 ˚c. (a) determine the temperatures on the two sides of the circuit board. (b) now a 0.2-cm thick, 12-cm high, and 18-cm long aluminum plate (k = 237 w/m˚c) with 864 2-cm-long aluminum pin fins of diameter 0.25 cm is attached to the back side of the circuit board with 0.02-cm thick epoxy adhesive (k =

If 1 lb of fat is stored by the body for each 14.6×103kj of excess nutritional energy consumed, how long will it take this person to gain 1 lb?

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

What is the measurement of how fast an object moves relative to a reference point?