1. which one of the following statements is correct?
a. when heat is transferred from the surroundings to the system, q is negative.
b. heat is transferred from the system to the surroundings in an endothermic
process.
c. the si unit of specific heat capacity is calories per gram (cal/g).
d. specific heat capacity is a positive value for liquids and a negative value for
solids.
e. the larger the heat capacity of an object, the more energy it takes it is to
cause a ten degree increase in temperature,

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.