The amount of heat per second conducted from the blood capillaries beneath the skin to the surface is 240 j/s. the energy is transferred a distance of 2.0 x 10^-3 m through a body whose surface area is 1.6 m^2. assuming that the thermal conductivity is that of body fat (k = 0.20 j/(s•m•degrees determine the temperature difference between the capillaries and the surface of the skin :

a. 9.2 degrees c

b. 5.4 degrees c

c. 1.5 degrees c

d. 6.9 degrees c

e. 3.7 degrees c

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)