Which best describes how fluids change as they travel through different portions of the convection
currents?
O They change to solids at the outer portion of the
Convection currents.
O They change to solids at the inner portion of the
convection currents.
O They become more dense at the outer portion of
the convection currents.
O They become more dense at the inner portion of
the convection currents.

Onsider a u-tube whose arms are open to the atmosphere. now, equal volumes of water (ρ = 62.4 lbm/ft3) and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and thus the liquid levels in the two arms are the same. if the fluid height in each arm is 31 in, determine the gage pressure the person exerts on the oil by blowing. (round the final answer to three decimal places.)