10 water does not drip through an open
umbrella of silk unless the inside of the
umbrella is touched. which of the following
phenomena is responsible for this?
a. surface tension.
b. hydrostatic upthrust
c. viscosity.
d. diffusion
e. osmosis.
waec

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.