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

Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.