Astream of liquid cyclopentane flows at a rate of 0.35 lbm / s into an initially empty container with a volume of 2.0 ft3, placed on a scale calibrated to read weight in lbf. the process takes place at sea level.
when only the empty container was on the scale, the scale reading was 2.50 lbf. estimate the reading 10 seconds after the flow starts.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the volume increases

that's what i got you can count the number of atoms

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.