A70 n force pulls a box straight up 5 m above the ground. how much work is done on the box?
a. 70 j
b. 35 j
c. not enough info
d. 350 j

the dependant variable is spilled water

the independent is the heat

answerlinnaeus;

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.