State the temperature of absolute zero in ∘C^\circ\text{C}∘C.
Describe, in terms of the kinetic theory of gases, how gas molecules produce a pressure on the container walls.
A salt-gradient solar pond uses a deep layer of concentrated brine to store thermal energy. A submerged gauge at the bottom of the brine layer measures the total pressure to monitor the depth of the brine. The gauge registers a total pressure of 125 kPa125\text{ kPa}125 kPa when the brine layer is at its target depth.
The total pressure at this depth is given by:
total pressure=atmospheric pressure+pressure due to the brine column \text{total pressure} = \text{atmospheric pressure} + \text{pressure due to the brine column} total pressure=atmospheric pressure+pressure due to the brine columnState the equation linking pressure difference, depth, density, and gravitational field strength ggg.
Calculate the depth of the brine layer when the gauge measures a total pressure of 125 kPa125\text{ kPa}125 kPa.
[atmospheric pressure = 101 kPa101\text{ kPa}101 kPa, density of brine = 1200 kg/m31200\text{ kg/m}^31200 kg/m3, gravitational field strength g=10 N/kgg = 10\text{ N/kg}g=10 N/kg]