One end of an insulated metal rod is maintained at 100 ∘c and the other end is maintained at 0.00 ∘c by ice–water mixture. the rod has a length of 60.0 cm and a cross-sectional area of 1.50 cm2. the heat conducted by the rod melts a mass of 8.30 g of ice in a time of 10.0 min. find the thermal conductivity k of the metal.

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=